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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY
Journal Basic Information
Journal DOI :
Korean Academy of Pediatric Dentistry
Editor in Chief :
Volume & Issues
Volume 24, Issue 4 - Nov 1997
Volume 24, Issue 3 - Aug 1997
Volume 24, Issue 2 - May 1997
Volume 24, Issue 1 - Feb 1997
Selecting the target year
THE ASPECT OF PROLIFERATION AND BONE NODULE FORMATION IN OSTEOBLAST-LIKE CELLS DERIVED FROM FETAL RAT CALVARIA IN VITRO
Kim, Shi-Hyeong ; Nam, Soon-Hyeun ; Shin, Hong-In ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 1~17
The purpose of this study was to investigate the aspects of proliferation and bone nodule formation of osteogenic precursor cells. To determine the effects of ascorbic acid and dexamethasone upon capacity of osteoblast proliferation and bone nodule formation, cells were maintained in the presence of one or some of these additives for up to 30 days. Group I culture was maintained in standard medium(DMEM plus 10% plus antibiotics), group II was maintained in supplemented medium containing dexamethasone, group III was maintained in supplemented medium containing ascorbic acid and sodium-
-glycerophosphate, and group IV was maintained in supplemented containing ascorbic acid, sodium-
-glycerophosphate and dexamethasone. Morphology of bone nodules was observed with light microscope and electron microscope. The results were as follows:
Proliferation capacity of osteoblasts was not affected by single use of dexamethasone, but it was chiefly affected by ascorbic acid.
Cellular morphology was fibroblastic appearance initially, but, it was gradually changed to polygonal shape accompanied by confluency stage.
Pluripotent mesenchymal cells existed during primary culture, they were differentiated to adipocyte, chondrocyte, osteocyte according to culture condition.
Dexamethasone increased bone nodule formation under the condition that the culture was maintained with supplemented medium ascorbic acid and sodium-
when the cultures were stained with alizarin red, the group supplemented with dexamethasone, ascorbic acid and sodium-
-glycerophosphate showed the marked increase of bone nodule formation, but the group supplemented with ascorbic acid and sodium-
-glycerophosphate revealed only small amounts of bone nodules. And the groups cultured without ascorbic acid showed no observed any of bone-like mass independent of dexamethasone addition.
REGIONAL ODONTODYSPLASIA : A REPORT OF TWO CASE
Son, Duk-Il ; Kim, Hyun-Jung ; Nam, Soon-Hyeun ; Kim, Young-Jin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 19~26
Odontodysplasia is a rare developmental anomaly of tooth formation in which hard tissue are affected. Odontodyplasia affects the primary and permanent dentitions in the maxilla, mandible, or both jaws. The maxilla is involved twice as often as the mandible. The condition is more common in female than in male patients and in the anterior than in the posterior regions. The clinical manifestation of odontodysplasia are hypoplasia and hypocalcification of the enamel and dentin of affected teeth. Teeth tend to be small and discolored, with short roots and widely open pulp canal. Delayed eruption of affected teeth with abscess formation is common. Radiographically teeth assume a faint radiolucent image ("ghost teeth"). enamel and dentin appear thin and are similar in radiodensity. The pulp chambers are often larger than normal, calcifications(pulp stone and denticle) are found within them. The etiology of regional odontodysplasia is unknown. However, several causes have been discussed, including somatic mutation, local circulatory disorders, local trauma, failure of migration and differentiation of neural crest cells, local infection.
AN HISTOPATHOLOGICAL STUDY ON THE EFFECT OF
LASER IRRADIATION ON THE EXPOSED DENTAL PULP
Kim, Jong-Kyu ; Lee, Keung-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 27~40
This study investigated the effects of laser irradiation on the exposed pulp and the possibility of direct pulp capping with the
laser. Results were obtained from the observation of the residual pulpal healing process. Class V cavities on 48 anterior teeth from 8 adult dogs were prepared and pulp chambers were intentionally opened with dental explorer. The control group consisted of 16 teeth.
(Caulk Co., U.S.A.) was applied to exposed site once bleeding was stopped. Cavities were sealed with
. In the experimental group 1 (16 teeth), laser(LASERSAT
, Satelec Co.) was irradiated on the exposed pulp. The laser procedure followed the manufacturers recommendations for the treatment of human pulp(1.5 Watts, 0.2 seconds, unfocused), and cavities were sealed with
. In the experimental group 2 (16 teeth), laser was irradiated on the exposed pulp in a more powerful dosage(5.0 Watts, 0.2 seconds, unfocused), and cavities were sealed with
. Two dogs were sacrificed immediately after experiment and the others were sacrificed at intervals of one, three, and eight weeks respectively. All teeth were routinely processed and the pulpal tissues and odontoblastic layers were observed by the light microscope. The results were as follows; 1. In the control group, the initial mild inflammation had improved to normal by week eight. An active formation of reparative dentin was observed at week three, and at week eight, a firm dentin bridge was present beneath the
with no inflammatory responses in the remaining pulp. 2. In the experimental group 1, immediately following irradiation, the superficial shape of the exposed pulp was crater-like. And it was lined with the coagulated layer,
in width. Moderate inflammatory pulpal conditions existing at week one were improved to mild at week eight. And from the week three specimens, a reparative dentin formation was observed in the adjacent odontoblastic layer of the exposed site. A dentin bridge at the exposed site, however, did not form during the experimental period. 3. In the experimental group 2, the width of the coagulation layer lining the crater was
. Beneath the coagulated layer, severe inflammatory pulpal responses were observed at week one, and conditions did not improve during the experimental period.
THE EFFECTS OF HYPERBARIC OXYGEN THERAPY ON PERIODONTAL WOUND HEALING OF REPLANTED RAT TOOTH
Chung, Ill-Young ; Kim, Kwang-Chul ; Lee, Keung-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 41~57
The present study investigated the effects of hyperbaric oxygen therapy on periodontal wound healing of replanted rat tooth. 80 rats (Sprague-Dawley strain) weighting
were selected and divided into experimental and control group, each group consisting of 40 rats. Rats were administered 0.4%
-aminoproprionitrile for 5 days to achieve gentle tooth extraction. The maxillary first molars were extracted under anesthesia with pentobarbital, washed in sterile distilled water, treated with bacterial collagenase to remove collagen fibers on the root surfaces. After washing in water overnight, the mesial root surface were demineralized by application of citric acid, washed, dried and stored at
. Immediately after tooth extraction and bleeding control, the treated molars extracted previously from other rats were replanted. The experimental group was exposed to hyperbaric oxygen at 2.5 atm. for 2 hrs. a day during experimental period. Eight animals of each group were sacrificed 1, 3, 6, 8, 10 days after reimplantation of teeth by intracardiac perfusion with 4% paraformaldehyde. The replanted molars and surrounding tissues were cut, demineralized, dehydrated and embedded in paraffin. Sections were stained with azan, toluidine blue and hematoxylin. Some other sections were stained by means of immunostaining achieved by the avidinbiotin complex method. The results as follows; 1. Experimental group showed fast healing of gingival epithelium. 2. Macrophage and newly formed blood vessels appeared early in the gingival connective tissue of experimental group. 3. Experimental group showed fast, abundant fibroblast proliferation and regularity of collagen fiber. 4. In both group, collagen was distributed along the collagen fiber. The distribution was strong and regular in the experimental group. 5. In the regenerated periodontal ligament of experimental group, fibers showed regular arrangement and invaded root surface fast.
A STUDY ON THE STAINING OF GLASS IONOMER CEMENT
Lee, Dong-Hoon ; Kim, Shin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 58~64
For the purpose of quantifying the staining rendency of light-cured glass ionomer cements and chemical-cured glass ionomer cements, Glass Ionomer specimens were stained with methylene blue and analyzed quantitatively with spectrophotometry. The data was processed and the result was as follows : 1. Chemical-cured glass ionomer cement showed higher color stability than light-cured glass ionomer cement with significance.(P<0.001) 2. In light-cured glass ionomer cement groups, Vitremer showed higher dye concentration of methylene blue than Fuji II LC. 3. In chemical-cured glass ionomer cement groups, Fuji II showed higher dye concentration of methylene blue than Ketac-fil.
GENOTYPING OF STREPTOCOCCUS MUTANS USING AP-PCR IN CHILDREN WITH RAMPANT CARIES
Jang, Myung-Jo ; Kim, Shin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 65~81
For the purpose of evaluating the appropriateness of AP-PCR as a facile, rapid and reproducible method for genotyping Streptococcus mutans, and selecting the discriminant primer for it, a DNA fingerprinting was performed on the microorganisms isolated from caries-free children and children with rampant caries, respectively. In the course of selecting appropriate primer for S. mutans genotyping, we chose S2 primer from 6 different primers which shows highest resolution on the agarose gel as well. Nineteen kinds of fingerprint patterns were observed in caries-free children and children with rampant caries which were produced by combination of 7 different fragments. Interestingly, the number of types observed in caries-free children was greater than that in children with rampant caries. And we observed Type 2 was predominant in children with rampant caries (about 80%) and relatively even distribution of each types in caries-free children. Furthermore, it was appeared that the major types in normal control were not or rarely found in children with rampant caries. In conclusion, we could establish simple, rapid and highly reproducible AP-PCR method for genotyping S. mutans. We also found differences in distribution of S. mutans between normal and patient, which suggested that cariogenicity is also dependent on qualitative aspects which is caused by the difference in genotypes of S. mutans in oral cavity.
THE SHEAR BOND STRENGTHS OF COMPOSITE RESINS TO GLASS IONOMER CEMENTS BY SURFACE TREATMENT AND ELAPSED TIME
Chung, Hye-In ; Kim, Shin ; Chung, Tae-Sung ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 82~94
For the purpose of establishing the most appropriate method of bonding between glass ionomer liners and composite resin and comparing the materials for sandwich technique, an experiment was performed to measure the shear bond strengths between the two with the variables in the surface treatment of liners and elapsed time till composite buildup. Materials used were Vitrebond and Fuji II LC, each as the restorative and liner respectively, and each group was subdivided by surface treatment (acid etching and sandblasting) and time elapsed from GIC filling to composite buildup (immediately, 1 day, 7 days), consisting 12 groups as a whole. Each subgroup was composed of 10 specimens and the shear bond strength between GIC liners and composite resin was measured under UTM and analyzed. The result were as follows: 1. The shear bond strength between two materials was highest when initially filled Fuji II LC was sandblasted after 1 days and composite built-up (Group FS1). And the lowest value was found when GIC was acid-etched after 7 days and composite built-up (Group FE7). Significant difference was found between the two groups. (P<0.01) 2. In regard of surface treatment of GI liners, acid-etched group (VE) showed higher bond strength than sandblasted group (VS) for Vitrebond. But, the reverse was true for Fuji II LC. (P<0.05) 3. In regard to the time elapsed from GI filling to composite buildup, the group of 1 day elapse showed relatively higher strength for Vitrebond. On the contrary, immediate buildup group (FE0) was stronger for acid-etched group and 1 day elapse group(FS1) was higher for sand-blasted group in Fuji II LC. (P<0.05)
AN ACOUSTIC ANALYSIS OF PRONUNCIATION IN CHILDREN WITH ANGLE'S CLASS II DIV. 1 MALOCCLUSION
Park, Yun-Chung ; Lee, Sang-Hoon ; Shon, Dong-Su ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 95~111
The human speech organ consists of respiration system (lung, larynx), phonation system (vocal cord), articulation system (esophagus, pharynx, uvula, teeth, gingiva, palate, tongue, lip) and resonating system(oral cavity, nasal cavity, paranasal sinus). Because teeth are components of the articulation system, it has been reported that the persons with abnormally positioned teeth generally have abnormal occlusion and pronunciation. In this study, using /ㅅ(s)/, the most commonly mispronunced consonant in children with malocclusion, and the seven single vowels, /사(sa), 서(
), 소(so), 수(su), 스(
), 시(si), 세(se)/ and / ㅏ(a), ㅓ(
), ㅗ(o), ㅜ(u), ㅡ(
), 1(i), ㅔ(e)/ were recorded and analyzed using speech analysis program on computer by measuring formants and compared them for investigating the differences in pronunciation in children with Angle's class I occlusions and those with Angle's class II div.1 malocclusion. The result were as follows: 1. In the Angle's Class II div.1 group, there were no significant differences in F1 of all recorded sounds as compared with Angle's Class I group(p>0.05). 2. In the consonants, there were significant differences in F2 of /스(
)/ and F2/F1 ratio of /사(sa), 서(
), 시(si)/ between the two group(p<0.05). 3. In the vowels, there were significant differences F2/F1 ratio of /ㅓ(
)/(p<0.05) and no significant differences in F2/F1 ratio between two group(p>0.05). 4. In the consonants, there were significant differences in F2 and F2/F1 ratio when succeeding vowels were high or low, and F2/F1 ratio when front in accordance with tongue position (p<0.05). 5. In the vowels, there were no significant differences in formant in accordance with tongue position(p>0.05)
AN EXPERIMENTAL STUDY ON THE SHEAR BOND STRENGTHS OF COMPOSITE RESIN TO AIR-ABRADED ENAMEL AND DENTIN
Shin, Jae-Ho ; Jang, Ki-Taeg ; Hahn, Se-Hyun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 112~124
According to extensive use of composite resin which have superior esthetic property, every effort on improving bonding strength between a tooth and composite resin has been continued. Acid etching technique is a method that micro-etches the tooth surface which provides bonding with composite resin possible. Recently, there were several reports that mechanical treatment obtained from air-abrasion can provide similar bonding strength with acid etching technique. So, this experimental study was designed to compare the shear bonding strength between using air-abrasion technique and using acid etching technique. Initially, bovine teeth were divided into enamel and dentin experimental groups. Respectively each group was categorized into three subgroups. One subgroup was acid etched with 35% phosphoric acid, then bonded with composite resin. The other subgroup was air-abraded with
particles sprayed with 160psi air pressure using air abrasion unit(KCP-1000, A.D.T., U.SA), and composite resin was bonded. In another subgroup, composite resin was bonded after acid etching following air-abrasion. So, enamel experimental groups were made of E1 (acid etched only), E2(air-abraded only), E3(acid etched following air-abraded), and dentin experimental groups were made of D1(acid etched only), D2(air-abraded only), D3(acid etched following air-abraded). Each subgroup had 10 specimens. Dentin bonding system(Scotchbond Multi-purpose, 3M Co., U.S.A.) and composite resin(Z-100, 3M Co., U.S.A.) were applied on treated surface using 5mm diameter gelatin capsule as manufacturer's direction. After 1200 times thermocycling between
, shear bond strength was measured in 5mm/min crosshead speed with Instron(Instron Co., U.S.A.), and also treated enamel and dentin were observed with SEM(JEOL Co., Japan). The following results were obtained: 1. In the enamel experimental groups, acid etched following air-abraded group had highest shear bond strength, but there was no significant difference compared to acid etched group. Air-abraded only group had lowest shear bond strength, and there was significant difference compared to the rest of groups. 2. In the dentin experimental groups, acid etched following air-abraded group had highest shear bond strength, but there was no significant difference compared to acid etched group. Air-abraded only group had lowest shear bond strength, and there was significant difference compared to the rest of groups. 3. In the SEM study, air-abraded enamel and dentin had irregular and rough surfaces.
A STUDY ON THE FLUORIDE CONTENT OF THE COMMERCIALLY AVAILABLE BEVERAGES AND THE FLUORIDE INTAKE OF CHILDREN
Lee, Mi-Na ; Lee, Sang-Hoon ; Kim, Chong-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 125~138
Along with recent economic prosperity, the consumption of commercially available beverages has increased dramatically. Beverages on the market are replacing tap water and constituting an increasing large proportion of the total daily fluoride intake. If such changes in the source of fluid intake are not taken into consideration, effective fluoride intake would become difficult in the fluoridated area while there would be confusion as to the basis for proper fluoride supplement prescription in the nonfluoridated area. So, dietary consultation is recommended for every pediatric patient. This study was conducted to provide the reference for dietary consultations on the subject of fluoride supplement using 72 beverages on the market. The fluoride content was measured and the fluoride intake from each age groups was calculated using fluoride ion specific electrode and HMDS-microdiffusion technique. 1. The average fluoride concentration of the 72 beverages was
, from 0.0106ppm to 2.2050ppm. 2. Natural fruit juices, diluted fruit juices, carbonated beverages and mixed beverages showed average fluoride concentration of
, respectively. There were significant differrence between diluted friut juice drinks and mixed beverage, and between the carbonated beverages and mixed beverges(p<0.05). 3. Using available data on the daily total consumption of beverages and the relative consumption of beverages on the market according to age, daily fluoride intake for various age groups was calculated. According to the results, 2 to 3 year-old children need 0.13mgF/day, those between 4 and 6 year-old need 0.15mgF/day, and those between 7 and 10 year-old need 0.17mgF/day.
CLINICAL APPLICATION OF ARGON LASER IN PEDIATRIC DENTISTRY
Lee, Mi-Na ; Lee, Sang-Hoon ; Kim, Chong-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 139~147
Argon laser used in this case report, is special in having two wavelength of 488, 514nm blue-green visible light spectrum. Blue light is used for composite resin polymerization and caries detection. Green light is used for soft tissue surgery and coagulation. Maximum absorption of this laser light occurs in red pigmentation such as hemoglobin. The argon laser may be well-suited for selective destruction of blood clots and hemangioma with minimal damage to adjacent tissues. Argon laser light penetrates tissue to the 1 mm depth, so its thermal intensity is lower than
laser light. Also, due to its short wavelength it can be focused in a small spot and even single gene can be excised by this laser and microscopy. After applicating argon laser to 4 patient for surgical procedure and to 1 patient for curing the composite resin, following results were obtained. 1. Improved visibility were gained due to hemostasis and no specific technique were needed according to easy recontouring of the tissue. 2. Ability to use by contact mode, tactile sense was superior but tissue dragability and accumulation of tissue on the tip needed sweeping motion. 3. Additive local anesthetic procedure was needed. 4. No suture and less curing time reduced chair time, this made argon laser available in pediatric dentistry.
ANTICARIOGENIC EFFECT OF FLUORIDE RELEASED FROM SEALANT COMPARED TO TOPICAL FLUORIDE APPLICATION METHODS
Park, Ki-Tae ; Shon, Heung-Kyu ; Chai, Byung-Jai ; Park, Kwang-Kyun ; Shon, Dong-Su ; Lee, Jong-Gap ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 148~172
Sixty human premolar teeth were used for this in vitro study. After each tooth was sectioned mesiodistally, one half was used for the experimental group and the other half for the control. Three groups were made for each fluoride applying method and twenthy teeth were assigned to each group. Ten teeth were used for evaluating total fluoride amount and the other ten were used for firmly-bound fluoride. Fluorshield was used for fluoride-releasing sealant and 1.23% APF, 0.05% NaF were used for topical application fluorides. Each tooth was cleaned with a tooth brush using nonfluoride containing pumice before the experiment. In the sealant group, fluoroshield was applied to the enamel surface without etching procedure and stored in
saline for 30 days. After 30 days, sealant was removed with explorer without scratching the enamel surface and washed with distilled water and dried. In the APF group, each tooth was immersed in 1.23% APF for 30 min then washed and dried in the same manner. In the NaF group, each tooth was immersed in 0.05% NaF for 24 hours then washed and dried as described above. After each fluoride regimen was applied, ten teeth were randomly selected from each group and immersed in 1M KOH solution for 24 hours to remove loosely-bound fluoride possibly deposited by the three different fluorides applied. In each group, total fluoride amount deposited and the amount of enamel removed by acid biopsy were calculated. After loosely-bound fluoride was removed, firmly-bound fluoride deposited and the amount of enamel removed by acid biopsy were also calculated. Total fluoride amount deposition was significantly increased in the APF and NaF groups, but not in the sealant group. Amount of enamel removed by acid-biopsy was also significantly diminished in the APF and NaF groups, but not in the sealant groups. After loosely-bound fluoride was removed from each groups, no statistical difference was found in the amount of firmly-bound fluoride in any groups. Also no effect of firmly-bound fluoride on enamel dissolution was shown in any groups after loosely-bound fluoride was removed from each group. In conclusion, topical application method of APF or NaF is more effective than fluoride-releasing sealant application to make
coating on enamel surface and
coating is the main source for anticariogenic effect of fluoride. However, longterm anticariogenic effect of fluoride-releasing sealant should be further evaluated.
ACCESSORY ROOT IN DECIDUOUS TEETH -case report-
Park, Kye-Ryun ; Choi, Hyung-Jun ; Sohn, Heung-Kyu ; Lee, Jong-Gap ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 173~178
As one of the developmental disturbances in shape of teeth, an accessory root may involve any teeth, but has very rare frequency in the deciduous teeth. Because it is possible to diagnose the accessory root only by use of the radiographs, it is important to detect this root early by carefully examining the radiographs. The accessory root produces several problems such as abnormal exfoliation of deciduous teeth, eruption abnormality of successive permanent teeth, infection due to residual root during tooth extraction, and incomplete pulp treatment, and therefore it is necessary to have a continuous follow check-up to prevent these problems.
OLIGODONTIA WITH FAMILIAL HISTORY -A case report-
Jeong, Hye-Seon ; Lee, Jae-Ho ; Choi, Hyung-Jun ; Choi, Byung-Jai ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 179~185
The prevalence of congenital teeth missing is about 2-10% of population and it is more common in permanent dentition than primary dentition. In the patients with congenital missing teeth symptoms such as conical tooth, prolonged retention of primary tooth, tooth attrition. and deficient alveolar bone growth can be accompanied. In this paper the results of clinical observation of the congenital teeth missing brothers and their familial history are presented.
EFFECTS OF FIXED SPACE MAINTAINER AFTER MISSING OF ANTERIOR TEETH
Hwang, Dong-Hwan ; Choi, Byung-Jai ; Choi, Hyung-Jun ; Lee, Jae-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 186~194
The three child patients aged 3 to 5 years were worn by anterior space maintainer which are fixed type after missing of anterior teeth due to nursing caries, and were taken periodic follow check up. The results are : 1. At missing of anterior teeth, fixed space maintainer can be used. 2. Increased esthetic satisfaction and positive change of social behavior can be observed by these child patients. 3. Some phonations can be changed definitely after wearing the fixed space maintainer.
FACTORS AFFECTING WOMEN'S PREVENTIVE DENTAL UTILIZATION : AN APPLICATION OF THE ANDERSEN-NEWMAN MODEL
Kim, Soo-Nam ; Lee, Heung-Soo ; Kim, Dae-Eop ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 195~203
The purpose of this study is to provide framework for understanding women's preventive dental utilization. In this paper Andersen-Newman's model is applied to the use of dental visits. This model consists of predisposing, enabling, and need components that describe a person's decision to use preventive health services. The sample consisted of 1907 women living Iksan city. Models are operationalized using stepwise multiple regression analysis and path analysis. The number of independent variables used in the analysis was 27 in total, i.e. 20 predisposing components, 6 enabling components, and 1 need component. Preventive dental utilization was measured based on the number of visits. The data collected by means of a questionnaire survey. In this study, the amount of variance by the model was 11 percent. Number of restricted activity days caused by oral disease, perceived threat of dental disease, having a regular dental care, and income were found to have significant major effects on preventive dental utilization of women. Number of restricted activity days caused by oral disease was the most important variable affecting preventive dental utilization of women.
EFFECTS OF FLUORIDE MOUTHRINSE ON CELL ACTIVITY OF GINGIVAL FIBROBLASTS OF CHILDREN
Lee, Dong-Hyun ; Lee, Kwang-Hee ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 204~219
The use of fluoride is one of the most effective methods for caries prevention. Fluoridation of public water supply has been recognized, for many years, as an effective way to reduce dental caries. The fluoride supplement has been recommended when the natural fluoride was unavailable or below the optimal range. However the mechanism of caries prevention by fluoride has not yet been clarified and it is well known that an overdose of fluoride results inacute and chronic toxicity, especially dental fluorosis. Fluoride mouthrinsing solution is widely used in dentistry due to its effectiveness in carrying anticariogenic action. Understanding the effects of fluoride mouthrinsing solution on human gingival fibroblasts will provide the safety rationale for its use during the caries preventive therapy. The purpose of this study was to evaluate the cytotoxic effect of fluoride mouthrinsing solution on the human gingival fibroblast in vitro. The human gingival fibroblasts were cultured from healthy gingiva on the extracted deciduous teeth of children. Cells were inoculated into a 24-well plate with
of medium at
, 100% humidity, 5%
incubator for 24 hours. And the cells were counted by using the hemocytometer at each designed study. Human gingival fibroblasts were cultured in growth medium after one minute application range of 0.02%-0.2% NaF solution and 0.1%
solution. The cells used in this study were between fifth to eighth passage number. The cell morphology was examined by inverted microscope and cell proliferation was measured by incorporating
-thymidine into DNA. DNA synthesis by human gingival fibroblasts was assessed by
-thymidine uptake assays while the cell activity was measured by MTT assay. Each concentrated fluoride mouthrinsing solution was estimated for its biocompatability with fibroblasts by the tissue culture technique. The results of this study were as follows : 1. It was observed that at 0.05%, 0.2% NaF mouthrinsing solution the cytoplasmic processes became globular. When 0.1%
mouthrinsing solution was applied, the cytoplasmic process and cell morphology were disappeared. 2. DNA synthetic activity was reduced regardless of the concentration of the fluoride mouthrinsing solution. However, the result is statistically insignificant except 0.1%
mouthrinsing solution(p<0.05). 3. Our results indicate that 0.02%, 0.05% concentrations of NaF mouthrinsing solution caused minimal cytotoxicity. But 0.2% NaF and 0.1%
concentration were a significant difference between the cell activity in the experimental group and control group (p<0.05). 4. After appling 0.05% & 0.02% NaF fluoride mouthrinsing solution, cell activity was restored to the control groups level according to incubating time. The results suggest that direct exposure to fluoride solution inhibits gingival fibroblast activity. Therefore, for the most effective use of fluoride use, lowering the concentration of fluoride mouthrinsing is advisable because it maintains biocompatability and free ion in the oral fluid.
KNOWLEDGE AND ATTITUDE OF MOTHERS WHO HAVE INFANTS ABOUT BABY BOTTLE TOOTH DECAY AND DENTAL CARIES PREVENTION
Lee, Ji-Young ; Lee, Kwang-Hee ; Kim, Dae-Eop ; Jo, Jung-Han ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 220~234
The purpose of this study was to investigate the knowledge and attitude of a group of mothers who had infants about baby bottle tooth decay(BBTD) and dental caries prevention. The sample consisted of 261 mothers who had infants from 6 to 36 months from certain areas of Dae-jeon city. The mothers were asked to answer a questionnaire which included a series of questions regarding general information cencerning the infant and his mother, knowledge about BBTD and methods of prevention using fluoride, knowledge about behavioral risk factors contributing to caries of the infant, attitude toward oral health care of the infant, opinions regarding the effectiveness of methods to prevent dental caries and sources of oral health information. he results of this study were as follow. 1. 85.4% of the respondents thought that prolonged bottle feeding would harm the teeth of the infant, but 77% of the respondents had never heard of baby bottle tooth decay. 2. Levels of knowledge about methods of prevention using fluoride were relatively low and there were significant relationships between the levels of this knowledge and the educational level of the respondents(P<0.05). 3. Only 7.3% of the respondents thought that prolonged breast feeding would harm the teeth of the infant. 4. Overall oral health care of the infants was relatively insufficient. 5. Only 28.7% of the respondents selected either when the first tooth erupt or deciduous dentition complete as the time a infant should first be seen by a dentist. 6. 64.6% of the respondents thought that toothbrushing should be instituted once the first tooth appears. 7. Among the six methods of preventing caries in infants, respondents ranked the effective of fluoride lower than making regular dental visits and reducing intake of sugared foods. 8. Most frequently cited sources of information about dental health were newspapers, magazines and books(65%), followed by friends, neighborhoods and families (55%).
MAIN COLORS OF PRESCHOOL CHILDREN'S DRAWINGS OF THE DENTIST AND THEIR ASSOCIATION WITH THE DENTAL ANXIETY
You, Doo-Seon ; Lee, Kwang-Hee ; Kim, Dae-Eop ; Ro, Dong-Ju ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 235~246
This study was done as a pilot study to develop a color test measuring children's dental anxiety. The subjects of study were 511 preschool children aged from 3 to 6. Caries experience was examined. Children's drawings of the dentist were collected and analyzed by the method of human figure drawing test modified by Sonnenberg and Venham. Colors of high dental anxiety level were black, brown, purple, red, yellow, pink, green, orange, blue, gray, yellow ochre, and white in that order. Colors of high frequency of use were yellow ochre, green, blue, red, orange, pink, black & purple, yellow, brown, gray, and white in that order. As the age increased, white & gray, yellow ochre, and blue increased and black, purple, and pink decreased. Boys liked green and blue, and girls liked orange and yellow. Filled teeth rate was highest in yellow ochre group and very low in black group. Children who had an educational dental visit before the test used green color more than the rest of children.
RELATION BETWEEN CARIES ACTIVITY AND ORAL HYGIENE HABITS IN PRESCHOOL CHILDREN
Jo, Seon-A ; Lee, Kwang-Hee ; Kim, Dae-Eop ; Jeong, Young-Seok ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 247~264
501 preschool children from 4 to 6 years were examined for their salivary reductase activity and caries experience by Resazurin Disc Test and dental examination respectively. We asked the parents about their children's oral hygiene habits, between-meal eating habits, and physical exercise habits by the questionnaire. Toothbrushing frequency had negative relation to salivary reductase activity and caries experience. Caries experience was low when parents did toothbrushing for children, when teeth were brushed at bedtime, and when fluoride toothpastes were used. Salivary reductase activity and caries experience were high in bread & cookies group, chocolates & candies group, milk & soft drink group, and fruits & vegetables group in order. Caries experience was high in case of irregular between-meal eating. Sweet food eating frequency had positive relation to caries experience. Caries activity was low in case of eating homemade non-sweet between-meals. Salivary reductase activity and caries experience were low when gum-chewing frequency was high. Salivary reductase activity and caries experience were high when the amount of physical exercise was low.
SALIVARY REDUCTASE ACTIVITY AND DENTAL CARIES PREVALENCE IN PRESCHOOL CHILDREN
Hur, Yong-Wook ; Lee, Kwang-Hee ; Kim, Dae-Eop ; Jo, Jung-Han ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 265~279
The purpose of this study was to do an epidemiological survey of the salivary reductase activity and dental caries prevalence of the large group of preschool children and analyze the validity of the salivary reductase activity test as a caries activity test. One thousand and forty-four preschool children were examined for caries experience and salivary reductase activity by dental survey and the Resazurin Disc Test. 39.8% of children showed low salivary reductase activity, 39.4% showed middle, and 20.8% showed high. Salivary reductase activity increased as age increased. All indexes of caries experience were high when salivary reductase activity was high. There was positive relation between salivary reductase activity and caries experience. The salivary reductase activity of children with no caries experience was lower than that of children with caries experience. The salivary reductase activity of children with low caries experience was lower than that of children with high caries experience. It seemed that the salivary reductase activity test had basic validity as a caries activity test. However, the test's ability to select the small risk group of high caries susceptibility should be enhanced.
THE COMPARATIVE STUDY ON THE CONSCIOUS SEDATIVE EFFECT OF CHLORAL HYDRATE/HYDROXYZINE AND MIDAZOLAM FOR MANAGEMENT OF THE DIFFICULT PEDIATRIC PATIENT
Kim, Seon-Mi ; Yang, Kyu-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 280~292
The purpose of this study was to assess the sedative effect of three kinds of medication for management of the uncooperative 60 children aged from 16 months to 87 months required extensive treatment. The patients were given randomly a dose of 75mg/kg of chloral hydrate and hydroxyzine 25mg orally or 0.5mg/kg of midazolam orally or 0.3mg/kg of midazolam intranasally. All the children were restrained in a Pediwrap and were monitored with Pulse oximeter for assessing the safety of patients. According to rating scale, sleep, crying, movement, and overall behavior were checked for evaluation of the clinical sedative effect. The results were as follows: 1. In the evaluation of sleep, rating scale of chloral hydrate/hydroxyzine was superior to the other group(p<0.05). 2. In the evaluation of crying and movement at beginning of treatment, rating scale of chloral hydrate/hydroxyzine was superior to the other group(p<0.05), but during the treatment, rating scale of each group was not significantly different (p>0.05). 3. In the evaluation of overall behavior, 80% children of chloral hydrate/hydroxyzine were rated good or very good. With the oral and intranasal midazolam, 60% children were rated good or very good respectively. 4. There were no clinical signs of significant cyanosis and respiratory depression. Clinically, chloral hydrate/hydroxyzine was proved to be more effective sedation than any other sedative method. Oral and intranasal midazolam were also safe and effective sedation in young children undergoing pediatric dental procedures.
DENTAL TREATMENT IN A CHILD WITH WISKOTT-ALDRICH SYNDROME : A CASE REPORT
Yang, Cheol-Hee ; An, Soo-Hyeon ; Rho, Yong-Kwan ; Kim, Jae-Gon ; Baik, Byeong-Ju ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 293~299
Wiskott-Aldrich syndrome is a rare, hereditary disease occurring in males and was first described in 1937. It is characterized by cutaneous eczema, thrombocytopenic purpura and an increased susceptibility to infection due to an immunologic defect. Patients with Wiskott-Aldrich syndrome have a poor antibody response to polysaccharide antigens, low levels of IgM and high levels of IgA and IgE in serum. Oral manifestations of Wiskott-Aldrich syndrome was observed a spontaneous gingival bleeding, palatal petechiae, ulcer and gingival hyperplasia. We report on dental treatment of a 5 years old boy with severe spontaneous gingival bleeding and ulcer suffered from Wiskott-Aldrich syndrome. Prophylactic antibiotics to prevent infection and all potential measures including platelet concentrate therapy to prevent postoperative bleeding should be undertaken. Good oral hygiene should be maintained for prevention of infection by oral normal flora.
A STUDY OF ANALGESIC EFFECT ON PULP INDUCED BY PULSED Nd : YAG LASER
Kim, Do-Hyeong ; Lee, Chang-Seop ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 301~312
The purpose of this study was to evaluate the analgesic effect on pulp induced by pulsed Nd : YAG laser according to the power density, irradiated time and the method of application (Non-contact vs contact) in vivo. Experiments were carried out on 90 volunteers who have sound 4 canines. Each canine was grouped by the intensity and the time of irradiation of pulsed Nd : YAG laser was measured. Mean EPT response(units) was measured at 5 min, 30 min, and 60 min after irradiation with various intensity(1.5-3W, 15-30Hz), irradiated time (1.5min, 3min), and application method (Non-contact and contact). The results were as follows: 1. 5 minutes after irradiation, the mean EPT response(units) was increased by 32 % in the non-contact method and by 35% in the contact method of application. Which showed significant difference in mean EPT response(units) compared to not-lased canine in each groups(P<0.05). 2. The mean EPT response(units) with irradiating condition according to the various laser intensity, and the irradiation time stastically did not show significant difference in each groups as time elapsed. 3. There was no significant difference between the non-contact and contact method in the mean EPT response(units). 4. The mean EPT response(units) returned to the baseline value within 30 miuntes. In regard to the above results, the analgesic effect on pulp induced by pulsed Nd : YAG laser resulted a slight increase of pulpal pain threshold, but it was not as high as to replace the role of drug analgesia as whole. This technique can be used for inducing pulpal analgesia as adjunct to other pain control methods and is needed to develop better analgesic effects.
A STUDY ON THE EARLY DETECTION OF ENAMEL CARIES BY THE LUMINESCENCE EXCITED BY ARGON LASER
Lee, Nan-Young ; Lee, Chang-Seop ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 313~324
The aim of the present study was to describe an safe and convenient method for the early detection of enamel caries using laser fluorescence. Fluorescence from natually carious lesion of human teeth illuminated by an argon laser(488nm) was observed and photographed using barrier filter. Intact enamel was found to fluorescence with a yellowish light. Whereas, incipient caries lesions in the enamel were dearly visible as dark areas in contrast to the fluorescence surroundings. For evaluation of accuracy of this method, lesion depth measured by the laser fluorescence in light microscope was compared with that polarizing microscope. The results from the present study can be summarized as follows : 1. Enamel caries of smooth surface was observed as pale white spot and undefined outline in ordinary light. Whereas, lesion was clearly visible as dark spot in laser fluorescence. 2. There was no difference between ordinary light view and laser fluorescence in occlusal surface and interproximal surface. 3. There was no significant difference between the lesion depth observed by laser fluorescence with light microscope and polarizing microscope. Apparent correlation exists between two groups.
COMPENSATION EFFECT OF EXPOSURE TIME INCREASE TO DECREASED LIGHT INTENSITY OF VISIBLE-LIGHT CURING UNIT
Yoon, Tae-Won ; Lee, Chang-Seop ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 24, issue 1, 1997, Pages 325~336
The purpose of this study was to evaluate the compensation effect of exposure duration increase to decreased light intensity of visible-light curing unit. The specimen with 2mm thickness was made of Restorative
(A2 shade, 3M Dental Products, U.S.A.) and cured with
(Demetron Research Co. U.S.A.). The light intensity was controlled to 420
and curing time, also, controlled to 40, 60, 80 seconds. Cured specimen was stored in a light-proof container for 24 hours to post-irradation was completed. Microhardness of top and bottom surface of specimen were measured to evaluate the depth of cure. The obtained results were as follows: 1. The microhardness of top and bottom surface of the composite resin specimen was increased significantly as light intensity and exposure time was increased (P<0.01). 2. Light intensity was more correlated with bottom microhardness(
0.438) than top microhardness(
0.213), and exposure time was more correlated with top microhardness (
0.424) than bottom microhardness(
0.335). 3. The regressive equation was obtained in this study as follows :
(H : Microhardness(KHN), D : Exposure time, I : Light intensity)