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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 35, Issue 4 - Nov 2008
Volume 35, Issue 3 - Aug 2008
Volume 35, Issue 2 - May 2008
Volume 35, Issue 1 - Feb 2008
Selecting the target year
EFFECTS OF COLLAGENASE AND ESTERASE ON DENTIN BOND STRENGTH AND NANOLEAKAGE
Jung, Young-Jung ; Hahn, Se-Hyun ; Kim, Chong-Chul ; Lee, Sang-Hoon ; Kim, Jung-Wook ; Kim, Young-Jae ; Jang, Ki-Taeg ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 389~398
The purpose of this study was to evaluate the effects of collagenase and esterase on dentin bond strength and nanoleakage. Resin composites were bonded to occlusal dentin of premolars with Single Bond 2(SB) and Clearfil SE Bond(SE). After the microtensile specimens were prepared and stored in PBS for 24 hours(I) or, PBS(II), collagenase(III), esterase(IV) solution for 4 weeks, the specimens were stained with silver nitrate solution. Microtensile bond strength(
) and silver penetration area were measured and, the results were as follows: 1. For group II, III, and IV, the bond strengths of SB were lower than those of SB(p<0.05). The bond strengths of SB II, III, and IV were lower than that of SB I(p<0.05). There was no difference among the bond strengths of SE
groups(p>0.05). 2. Silver penetration areas of SB were higher than those of SE for all storage groups(p<0.05). In SB and SE groups, there was no significant difference of silver penetration area among
groups(p>0.05). 3. SE I, II, and III showed inverse relationship between the bond strengths and the silver penetration areas(p<0.05).
A STUDY OF RELATIONSHIP BETWEEN BITE FORCE, MASSETER MUSCLE AND CRANIOFACIAL MORPHOLOGY : CEPHALOMETRIC & ULTRASONOGRAPHIC ANALYSIS
Lee, Mi-Sook ; Choi, Yeong-Chul ; Choi, Sung-Chul ; Kim, Gwang-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 399~417
The aim of this study was to investigate the relationships between bite force, masseter muscle and craniofacial morphology. 141 individuals were included. Bite forces were measured with a bite force transducer(SKT 2004). The facial morphology of the samples was evaluated on the Lateral and PA cephalometric radiographs(Asahi CX-90 SP). Ultrasonographic images were obtained for 36 individuals(Logiq 500). General status of the subjects were also measured for investigating possible relationships. Their relationships were analyzed by means of t-test, Pearson's correlation coefficients and simple regression analysis. In conclusion, bite force of molar was significantly correlated with craniofacial morphology for males and females, but not to masseter muscles. The masseter muscle for males had a significant correlation with craniofacial morphology. The unexpected negative correlations between size of masseter muscle and maxillary width was revealed for males. One possible way to arrive at a plausible explanation for the correlation between masster muscle, bite force and craniofacial morphology of males were the deep layer of masseter muscle had a great influence on males and the superficial layer of masseter muscle had a great influence on females.
PROPERTIES OF FLUORIDE-RELEASING RESIN COMPOSITE RESTORATIVE MATERIALS
Kim, Sang-Hoon ; Baik, Byeong-Ju ; Kim, Jae-Gon ; Yang, Yeon-Mi ; Park, Jeong-Yeol ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 418~426
The objectives of this study were to examine the properties of fluoride-releasing resin composite restorative materials. Four commercially available compomer materials (Compoglass F: CF,
flow: DF, F2000: FT) and one fluoride-releasing composite resin (
Ceram: TC) were selected as experimental materials. Rectangular-shaped tensile test specimens were fabricated in a teflon mold giving 5mm in gauge length and 2mm in thickness. Disk-shaped specimens were fabricated in the split teflon mold with diameter of 15mm and thickness of 1mm. After curing for an hour, specimens were immersed in deionized water at
for 30 days. All specimens were thermocycled for 10,000 cycles with 15 seconds of dwelling time in each
water baths. Toothbrush abrasion test was conducted under a load of 1.5 N and the abraded surfaces were examined with surface roughness tester (SV-3000, Mitutoyo Co, Japan) and SEM (JSM-5800, JEOL, Japan). Fluoride recharging was done by toothbrushing for 3 min. using a fluoride toothpaste (Perio Alpine Herb, LG Household & Health Care, Korea). The results obtained were summarized as follows; 1. The highest tensile strength value of 32.3 MPa was observed in TC group and the lowest value of 16.8 MPa was observed in CF group. The tensile strength of TC group was significantly higher than those of CF and DF groups (P<0.05). 2. The lowest Ra value of 0.287 was observed in TC group and the highest value of 1.516 was observed in FT group. The Ra value of FT group was significantly higher than other groups (P<0.05). 3. The abraded surfaces revealed the increase of surface roughness due to the protrusion and missing of filler particles. 4. The release of fluoride of compomers after tooth brushing by Perio Alpine Herb was initially large and then followed by small and continuously. But it remains small and constant in fluoride-releasing composite resin of TC. 5. The highest value of fluoride release after toothbrushing by Perio Alpine Herb was
in CF group and the lowest value was
in TC group. The amount of fluoride release of CF group was significantly higher than other groups (P<0.05).
Comparison of Behavioral Response between Intranasal and Submucosal Midazolam Adminstration
Kim, Yun-Hee ; Jung, Sang-Hyuk ; Baek, Kwang-Woo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 427~436
Purpose. The objective of this study was to evaluate the behavioral response and assess the effectiveness of additional intranasal (IN) and submucosal (SM) administration of midazolam during pediatric sedation for dental procedure. Material and methods. Thirty-three cases of healthy (ASAⅠ), uncooperative children aged from 24 to 72 month old at pediatric dental clinic of Ewha Womans University Hospital were selected for this study. Children received oral chloral hydrate 50 mg/kg with hydroxyzine 1.0 mg/kg. After waiting for 45 minutes, midazolam 0.2 mg/kg was administrated via IN route and via SM route randomly maintaining 50% of
. A pulse oximeter and a capnograph were used for measuring vital signs (
, PR, RR,
) throughout the sedation. Behavioral response was evaluated as Quiet (Q), Crying (C), Movement (M) or Struggling (S) in every 2 minutes for 40 minutes. Results. There were also no statistically significant differences in vital signs of the two groups. The behavioral response for the first ten minutes during sedation was a statistically significant difference (P < 0.05) between the two groups. After the first ten minutes, it was revealed that there was no significant difference. Conclusion. This study demonstrated that the addition of IN midazolam to the combination of oral chloral hydrate with hydroxyzine and nitrous oxide/oxygen inhalation is as safe and effective as that of SM midazolam in pediatric sedation for dental procedure.
THE EFFECT OF ETCHING TIME ON THE PATTERN OF ACID ETCHING ON THE ENAMEL OF PRIMARY TEETH
Choi, Su-Mi ; Choi, Young-Chul ; Park, Jae-Hong ; Choi, Sung-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 437~445
The presence of a "prismless" layer on the enamel surface particularly on deciduous teeth has been reported by a number of workers. This structure, which appears to lack the normal prism delineations, could interfere with tag formation and hence, reduce bonding to such surfaces. The purpose of this study was to investigate the relationship of etching times on the effect of acid etching on primary enamel with respect to the quality of etching patterns. Labial surfaces of 32 extracted or exfoliated caries-free primary anterior teeth were used. 35% phosphoric acid gel was used only cervical regions of labial surfaces for each etching time group, 15, 30, 45 and 60 seconds. The surfaces were then washed with water for 20 seconds and dried with air spray for 20 seconds. 1. The Type 3 is 75% when the 15 seconds acid etching time was used. 2. The Type 1 is 38% and Type 2 is 75% when the 30 and 45 seconds acid etching time was used. 3. The Type 1 is 25% and Type 2 is 75% when the 60 seconds acid etching time was used. 4. An etching time of 60 seconds produced a constant and regular etching pattern. 5. There is a significant difference between the groups with respect to the patterns of etch achieved(p<0.05). 6. We confirmed that the acid induced patterns(type 1, 2) became more pronounced when the application time increased(p<0.05).
seconds was the optimal time for etching on the primary enamel.
EFFECT OF A FLUORIDE VARNISH ON THE ENAMEL DEMINERALIZATION
Yoon, Myung-Ok ; Lee, Nan-Young ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 446~455
The aim of this study was to evaluate the effect of fluoride varnish application on enamel decalcification. Eighty bovine enamel blocks divided randomly into 4 groups. Group I is the control group. Group II was treated with the APF gel and washed after 4 minutes. Group III and IV was treated with Fluor
and washed after 1 minutes. Decalcification were created by placing all specimen into artificial acidic solution(pH 4.0). Then the optical density of the lesions were measured by visible light fluorescence and the lesion depths were measured. The results were : 1. The optical density of group II was higher than group I but lower than group III, IV(p<0.05) and there was no difference between group III, IV(p>0.05) at 48 hours. 2. The optical density of group IV was highest at 72 hours(p<0.05). 3. Mean lesion depths were
in group I, II but no significant difference between two groups(p>0.05). 4. Mean lesion depths were
in group III, IV but no significant difference between two groups(p>0.05). Fluoride varnish treatment resulted in a significant reduction in lesion depth compared with APF gel. Fluor
provided the similar effect.
THE STUDY ON THE MICROLEAKAGE PATTERN OF FLOWABLE COMPOSITE RESIN RESTORATIONS ACCORDING TO THE TYPE OF ADHESIVE MATERIALS
Park, Ji-Eun ; Kim, Jong-Soo ; Yoo, Seung-Hoon ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 456~468
This study was performed to evaluate the quality of newly offered dentin bonding system(
One) by comparing the degree of microleakage measured with those of several conventional adhesive materials(AQ Bond Plus and
Single Bond 2). The quality of hybrid layer and resin tags was analyzed by observing restoration/ tooth interface under SEM. All-in-one system is in the limelight for having advantage of reducing chair time of children with difficult behavior pattern. Therefore the possibility of clinical application of All-in-one system was evaluated. The results obtained are as follows; 1. At the enamel margin, group II(AQ Bond Plus) showed the highest value of microleakage, and the other groups showed decreased value in order of group III(
One) and I(
Single Bond 2). There was statistically significant difference between group II and the others(p<0.05), and no statistical difference was found between group I and III. 2. At the dentin margin, microleakage value was increased in order of group II, I, III and significant difference between all groups(p<0.05). 3. In group I and III, microleakage value measured at the enamel margin was significantly lower than that seen at the dentin margin(p<0.05), and there was no statistical difference in group II. 4. Resin tags observed under SEM were very weak and tangled in group II and III while the strong and thick tags were observed in group I. In conclusion, careful case selection and accurate clinical application is recommended in using AQ Bond Plus and
One, giving consideration of the results showing its higher microleakage and weaker strength than
Single Bond 2.
COMPARATIVE STUDY ON THE FLUORIDE RELEASE AND COMPRESSIVE STRENGTH OF SEVERAL F-CONTAINING RESTORATIVE MATERIALS
Park, Jee-Young ; Kim, Jong-Soo ; Kim, Seung-Oh ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 469~476
This study was performed to compare the fluoride release pattern and compressive strength of recently developed resin-modified glass ionomers(
N 100 and Fuji Fil LC) with those of conventional glass ionomer restorative material(Fuji II LC). Fifteen sample discs(6 mm diameter and 1 mm height) were prepared for each tested material. The fluoride release was measured by pH/ISE meter(750P, Istek, Korea) for 31 days. For compressive strength experiment, fifteen cylindrical specimens were prepared for each tested material. Each specimen was submitted to compressive strength testing in an universal testing machine(Kyung-sung Testing Machine Co., Korea) at crosshead speed of 5.0mm/min until failure. The results can be summarized as follows; 1. Fuji Fil LC released the highest amount of fluoride, followed by Fuji II LC and
N 100(p<0.05). 2. The compressive strength of Fuji Fil LC was the lowest(p<0.05). However, no significant difference was found from Fuji II LC and
N 100(p>0.05). By considering the above results, careful case selection and accurate clinical application is recommended when using
N 100 and Fuji Fil LC.
EFFECT OF CURING CONDITIONS ON THE MONOMER ELUTION OF ORTHODONTIC ACRYLIC RESIN
Noh, Hong-Seok ; Kim, Jae-Moon ; Kim, Shin ; Jeong, Tae-Sung ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 477~486
Acrylic resin is widely used in dental practice. However, the residual monomer in acrylic resin could act as a negative biocompatability on human body. The aim of this study was to evaluate the amount of the monomer elution from polymerized orthodontic acrylic resin. Orthodontic acrylic resin was used in the study. The curing condition of the resin was controlled by temperature, pressure, aquatic and atmospheric environment. The duration and amount of monomer elution and timedependent plot was recorded by high performance liquid chromatography. The result showed that the only monomer eluted from the resin was methyl methacrylic acid. And the amount of the monomer elution has diminished considerably by time progress especially within 24 hours. Furthermore, elution of the residual monomer was significantly lower in group of pressure, moisture and elevated temperature than control (p<.05). According to this study, it was thought that the elution of residual monomer might be influenced by curing environment.
THE ATTITUDE SURVEY OF ORTHODONTIC PATIENTS' PARENTS AT CHONBUK NATIONAL UNIVERSITY HOSPITAL, THE DEPARTMENT OF PEDIATRIC DENTISTRY
So, Yu-Ryeo ; Baik, Byeong-Ju ; Kim, Jae-Gon ; Yang, Yeon-Mi ; Lee, Young-Hun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 487~493
Recently, in proportion to the remarkable development of dentistry and income increases it is growing more and more a concern about changed awareness in appearance. In this study, it had a grasp of the purpose for university hospital visiting, the motive of the commencement for orthodontic treatment and a method of the treatment as well as term. Based on these, the aim of this study is to keep more of the information between parent and doctors for mutual understanding and to grasp the characteristics for the needs of orthodontic treatment. In order to conduct researches, there has made a survey of 150 persons among orthodontic patients' parents who visit CBNU hospital, the pediatric dentistry. The study has found the results like these. 1. There was a question about the reason to visit CBNU hospital in the department of pediatric dentistry for orthodontic treatment. 52.1% of respondents, the survey found, were more likely to receive a good medical service. 25% of them were counselled from a relative or an acquaintance. 16.7% of them were recommended by another dental clinic. 2. There was a question about the expected orthodontic treatment period, when at first hospital visiting. 37.5% of the respondents answered that it was a 'more than 2 years', 12.5% of them said 'from 12 months to 18 months'. 3. There was a question about the reason to receive orthodontic treatment. 58.3% of the respondents, the survey found, answered the reason was parents' concern about the malocclusion of their children, 12.5% of them said a the orthodontic problem pointed out by entourages. 4. There was a question about the method of orthodontic treatment for patients who visit the department in pediatric dentistry. 41.7% of the respondents said that it was used as 'an intra-oral fixed appliance', 29.2% of them said 'an intra-oral removable appliance', 2.1% of them said 'an extra-oral appliance', 5. There was a question about the waiting time for treatment after a dental appointment. 60.4% of the respondents said 'from 5 minutes to 10 minutes', 4.1% of them said 'from 15 minutes to 30 minutes'. There was a question about the extent of an acceptable waiting time. It was answered to 'from 5 minutes to 10 minutes' by 60.4% of them, 2.1% of them said 'from 15 minutes to 30 minutes'.
QUANTITATIVE DETECTION OF PERIODONTOPATHIC BACTERIA USING REAL-TIME PCR
Kim, Seon-Mi ; Yang, Kyu-Ho ; Choi, Nam-Ki ; Kang, Mi-Sun ; Oh, Jong-Suk ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 494~503
EFFECT OF INTUBATION ON THE PRIMARY DENTITION PRIOR TO TOOTH ERUPTION: A CASE REPORT
Shin, Yun-Kyung ; Kim, Yeong-Jae ; Kim, Jung-Wook ; Jang, Ki-Taek ; Lee, Sang-Hoon ; Kim, Chong-Chul ; Han, Se-Hyeon ; Hyun, Hong-Keun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 504~508
Delayed eruption and abnormal morphology of the primary incisors following intubation may be due to follicular displacement and localized trauma caused by the process of intubation. Result of such damage included palatal groove formation, defective incisors and acquired clefts. This clinical report presents effect of intubation on the primary dentition of premature low-birth-weight children prior to tooth eruption.
SCANNING ELECTRON MICROSCOPIC STUDY OF THE EFFECT OF ACIDIC DRINK ON ENAMEL EROSION : A CASE REPORT
Kim, Su-Youn ; Park, Jae-Hong ; Kim, Gwang-Chul ; Choi, Young-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 509~515
It is widely believed that the increase in the prevalence of dental erosion is due to soft drinks. The purpose of this study was to assess the influence of soft drinks and etchant on the erosion of tooth enamel and the effect of tooth brushing on the abrasion of eroded enamel, and the effect of milk, saliva and Tooth
on the remineralization. The changes in tooth enamel surface were observed by scanning electron microscophy. The results were as follows; 1. The pH of Coca-Cola and Chilsung-Cider were higher than the pH of FineEtch 37 and
. 2. The SEM photos revealed that the pattern of the surface eroded by Coca-Cola and Chilsung-Cider were more obvious than that eroded by etchants. 3. The results of remineralization by saliva, milk, Tooth
were not different from each other. 4. The remineralization by saliva decreased tooth brushing abrasion.
SURGICAL REPOSITIONING OF THE DISPLACED IMPACTED MAXILLARY CENTRAL INCISOR WITH DILACERATED ROOT : CASE REPORT
Rhee, Ye-Ri ; Choi, Sung-Chul ; Park, Jae-Hong ; Kim, Gwang-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 516~522
In the case of the impacted teeth, the clinician has to consider development of tooth, site of impaction, eruption path, and cooperation of patient. If there are genetic or general factors to effect the eruption of tooth, the clinician treats these first and then takes the early treatment for eruption guidance. If there are physical factors to intercept eruption, the clinician put them off first. However, if there are no factors to effect eruption of tooth and enough space for eruption, the clinician can consider extraction of deciduous teeth, forced eruption and surgical reposition. In case of surgical repositioning, proper time for root development, proper socket formation, and minimal trauma are important for success. This case presents displaced impacted maxillary central incisor with dilacerated root. The development of root is Nolla's stage 7, and the tooth was treated by surgical repositioning. We can observe no root resorption and good healing pattern.
MAXILLARY MOLAR DISTALIZATION WITH A PENDULUM APPLIANCE
Lee, H.J. ; Kim, Y.J. ; Kim, J.W. ; Jang, K.T. ; Lee, S.H. ; Kim, C.C. ; Hahn, S.H. ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 523~531
Maxillary molar distalization is a treatment approach for patients with Class II malocclusions who do not require extractions and mesial movements of mandibular molars. The pendulum appliance is effective for distalization of the maxillary molars and independent of patient cooperation. This appliance can stabilize the maxillary premolars and use the palatal rugae area as an additional anchorage. However, caution is needed to control collateral effects, including increase of lower facial height, incisor protrusion and damage to the rugae area. This article reports the cases in which maxillary molar distalization achieved by pendulum appliance resolves the space problems and corrects the molar relationships.
TONGUE INJURIES BY SELF MUTILATION IN LESCH-NYHAN SYNDROME PATIENT: A CASE REPORT
Kim, Ji-Hee ; Choi, Byung-Jai ; Kim, Seong-Oh ; Choi, Hyung-Jun ; Son, Heung-Kyu ; Lee, Jae-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 532~538
Lesch-Nyhan syndrome is a rare X-linked recessively inherited disorder, caused by complete absence or decrease in activity of hypoxanthine guanine phosphoribosyl transferase(HPRT), an enzyme involved in purine metabolism. This enzyme deficiency gives rise to nephropathy symptoms, such as hyperuricosuria and hyperuricemia by excessive uric acid production and neuropathy symptoms, such as mental retardation, choreoathetosis and self mutilation behavior. Patients with Lesch-Nyhan syndrome have tendency to bite their lip, tongue and finger. In severe cases, partial or even total amputation of tongue or finger occur. Self-inflicted bites are often complicated by secondary infection to the injured site as well as pain. Furthermore tissue loss by biting results in esthetic problems. The dental management of self mutilation includes treatment with appliances such as soft mouth guard or lip bumper, extraction of all the teeth, and orthognathic surgery. We report a case of a 13 year-old boy with Lesch-Nyhan syndrome, who severely injured himself on his tongue. At first, conservative treatment using soft mouth guard was considered, but it could not prevent trauma on his tongue. Therefore, extraction of the lower anterior and posterior teeth was carried out.
APERT SYNDROME : CASE REPORT
Park, Kwang-Sun ; Park, Ho-Won ; Lee, Ju-Hyun ; Seo, Hyun-Woo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 539~547
Apert syndrome is an autosomal dominant condition characterized by craniosynostosis, midface hypoplasia, and syndactyly of the hands and feet. It occurs in about 1 of every 65,000 to 160,000 births and is caused by a mutation in the fibroblast growth factor receptor 2(FGFR2) gene. Apert syndrome typically produces acrobrachycephaly(tower skull). The occiput is flattened, and there is a tall appearance to the fore head. Ocular proptosis is a characteristic finding, along with hypertelorism and downward slanting lateral palpebral fissures. The middle third of the face is markedly retruded and hypoplastic, resulting in a relative mandibular prognathism. The reduced size of the nasopharynx and narrowing of the posterior choana can lead to mouth breathing, contributing to an open-mouth apprance. Three fourths of all patients exhibit either a cleft of the soft palate or a bifid uvula. The maxillary hypoplasia leads to a V-shaped arch and crowding of the teeth. A 6-year-old male patient visited to the Department of Pediatric dentistry, Kangnung National University of Dental Hospital. He visited the hospital to get treatment of carious teeth. The purpose of this report is to present a specific dental manifestations about the apert syndrome.
DENTIGEROUS CYST OF A MAXILLARY MESIODENS: CASE REPORTS
Lee, In-Young ; Kim, Tae-Wan ; Kim, Young-Jin ; Kim, Hyun-Jung ; Nam, Soon-Hyeun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 548~555
Dentigerous cyst is the most common type of odontogenic cyst followed by radicular cyst. Most of dentigerous cysts originate from the permanent dentition and a few of them are associated with mesiodens. The complications of a dentigerous cyst associated with mesiodens are eruption abnomalies of adjacent teeth, root resorption, displacement, rotation, diastema and the secondary infection of the cyst due to adjacent teeth. The treatment of a dentigerous cyst of a maxillary mesiodens is to enucleate a cyst with a mesiodens. Otherwise, when it is close to adjacent teeth, a cyst is to reduce the through marsupialization after removing a mesiodens. There are numerous studies on dentigerous cysts and mesiodentes alone; however, the studies on the association of the two are rare. These are case reports about patients with mixed dentition whose dentigerous cyst of a maxillary mesiodens had been removed. After removal, the patients have been regularly checked up and shown satisfactory progress.
ORAL MANIFESTATIONS OF NEUROFIBROMATOSIS TYPE 1: CASE REPORT
Gwon, Sun-Yeon ; Kim, Tae-Wan ; Kim, Young-Jin ; Kim, Hyun-Jung ; Nam, Soon-Hyeun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 556~561
Neurofibromatosis is an autosomal dominant disorder caused by a mutation of a tumor supressor gene on the long arm of chromosome 17. There are two types of neurofibromatosis, and development of neurofibroma is one of clinical diagnostic criteria for neurofibromatosis. The clinical signs of neurofibromatosis include as skin lesions, bone deformities, and tumors involving central nervous system. About 25% of neurofibromatosis involves oral neurofibroma. Radiographically, oral neurofibroma is well-defined unilocular radiolucency, which involves mandibular canal, mandibular foramen and mental foramen. When a lesion is small and approachable, complete resection, including 1cm of marginal connective tissue, is feasible. However, there are studies reporting that the recurrence rate after surgical resection is high and frequent recurrence may even increase the risk of malignant transformation. This case reports a patient with neurofibromatosis type I, accompanying oral neurofibroma, who shows a favorable result after surgical resection of the oral lesion.
AMELOGENESIS IMPERFECTA: A CASE REPORT
Park, Hee-Suk ; Kim, Tae-Wan ; Kim, Young-Jin ; Kim, Hyun-Jung ; Nam, Soon-Hyeun ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 562~570
Amelogenesis imperfecta is a group of hereditary defects of enamel, unassociated with any other generalized defects. It is classified into 14 subtypes according to different clinical and genetic features. According to its clinical features, it is classified into hypoplastic type, hypocalcified type and hypomaturation type. However, these features tend to co-exist often. Dental features associated with amelogenesis imperfecta include quantitative and qualitative enamel deficiencies, pulpal calcification, root malformations, abnormal eruption, impaction of permanent teeth, progressive resorption of root and crown, congenital missing teeth and anterior and posterior open bite occlusions. The first case patient is a 16 month-old child with discoloration of deciduous teeth. All of her deciduous and permanent dentition has shown amelogenesis imperfecta. The restorational, orthodontic and recent prosthodontic treatments have been completed. Another patient is a 9 year and 3 month-old child with amelogenesis imperfecta in both deciduous and permanent dentition. The restoration has been done and the prosthodontic treatment is planned after the completion of growth. Above cases indicate that amelogenesis imperfecta occurs both in deciduous and permanent dentition, and it requires the long term treatment and care.
CONSERVATIVE APPROACH ON THE SEVERELY DISPLACED ROOT FRACTURE OF PRIMARY INCISORS : CASE REPORT
Kim, Jee-Young ; Lee, Kwang-Hee ; Kim, Dae-Eop ; Ra, Ji-Young ; Lee, Dong-Jin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 571~577
Root fracture of primary teeth is relatively uncommon because the more pliable alveolar bone allows displacement of the tooth. Root fracture of primary teeth is occupied
in trauma pattern of primary teeth. A horizontal root fracture is classified based on the location of the fracture in relation to the root tip : the apical third, middle third, or cervical third of the root. The prognosis worsens the further cervically the fracture has occurrer. Root fracture of primary teeth should be treated by splinting the incisor to the adjacent normal teeth with a resin-wire splint for
weeks. However, if a portion of the root is abscessed or extremely mobile, it can be extracted, and the remaining root fragment will resorb normally. For coronal third fracture in primary teeth, the coronal third is extracted, leaving the apical portion of the root to resorb normally. These root fracture cases of primary teeth were treated by resin-wire splinting despite extremely mobile coronal fragment. Even though they seems like healing well, They need to be monitored regularly until their successors erupt.
PRESENT STATE AND PROSPECT OF PUBLIC DENTAL HEALTH SERVICE FOR CHILDREN AND ADOLESCENTS IN KOREA
Lee, Kwang-Hee ; Kim, Jee-Young ; Song, Ji-Hyon ; Kim, Yun-Hee ; Im, Kyeong-Uk ; Jeong, Seung-Yeol ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 35, issue 3, 2008, Pages 578~588
To achieve the dental health of children and adolescents which is the objective of the pediatric dentistry, the role of the public service should be increased. The basis of the public service is established by many laws of which the Dental Health Law is most important. The percentages of primary schools that had the school dental health clinic, that implemented the fluoride rinsing program, and that implemented the group toothbrushing after lunch were 7.2%, 57.5%, and 46.9%, respectively, and the percentages of primary school children that received the dental health education and that received the fissure sealing were 48.0% and 12.4%, respectively(2006). About 42% of infants and preschool children from 0 to 6 years received preventive dental care in the last one year, at the nursery or kindergarten(18%) or at the health center(1%)(2005). The percentage of the health centers that implemented water fluoridation was 11.3%, and the percentage of the population who drank the fluoridated water was 5.7%(2006). It was suggested that the school dental health administration should be unified, that dental health teachers should be employed, and that the comprehensive dental health care should be supplied to all the children and adolescents through the circuit school dentists and the school dental hospitals in the long term. Also, the dentist in charge system for the children and adolescent was suggested.