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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 37, Issue 4 - Nov 2010
Volume 37, Issue 3 - Aug 2010
Volume 37, Issue 2 - May 2010
Volume 37, Issue 1 - Feb 2010
Selecting the target year
GENE EXPRESSION ANALYSIS OF THE DENTAL PULP IN HEALTHY AND CARIES TEETH
Oh, So-Hee ; Kim, Jong-Soo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 275~287
Deep caries may induce pulpitis and the pulpal tissue interacts with microbial invasion. The immune response to protect the pulpal tissue can be mediated by cellular signal molecules produced by the pulpal cells. The understanding of these processes is important to find future therapeutic method for the diseased pulp. The pulp tissue from sound teeth was set as control group (n=30) and the pulp tissue from decayed teeth was set as test group (n=30). Total RNA was extracted from the pulp of each group and it was used for cDNA microarray and reverse transcriptase-polymerase chain reaction(RT-PCR). The expression of TGF-
was studied by immunohistochemistry. The results were as follows: 1. cDNA microarray analysis identified 520 genes with 6-fold or greater difference in expression level with 143 genes more abundant in health and 377 genes more abundant in disease. 2. The RT-PCR analysis was done for randomly selected 14 genes and the results supported the result of cDNA microarray assay. 3. TGF-
was highly expressed in the carious pulp and it was found in odontoblast by immunohistochemistry. In conclusion, many cytokines were found to be significantly changed their expression in the diseased pulp(/M/>1.6).
IN VITRO STUDY OF DEMINERALIZATION INHIBITION EFFECT AND FLUORIDE UPTAKE INTO ADJACENT TEETH OF LIGHT-CURED FLUORIDE-RELEASING RESTORATIVES
Kim, Song-Yi ; Choi, Sung-Chul ; Kim, Kwang-Chul ; Choi, Yeong-Chul ; Park, Jae-Hong ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 288~297
The purpose of this study was to evaluate the effect of light cured fluoride-releasing materials on the inhibition of demineralization. In addition, the pattern of fluoride uptake of adjacent tooth structure was analyzed with EPMA. Eighty intact premolars were restored with
Z250(control group, composite), Fuji Filling
(compomer) and Beautifil II(giomer). Restored teeth were stored in distilled water for 30 days. Then sixty teeth(n=15) were exposed to demineralizing solution(pH 4.3). Demineralized teeth were bisected and polished. The specimens were observed with confocal laser scanning microscope. The depth of outer lesion and the thickness of inhibition zone were measured. Remained twenty teeth(n=5) were bisected for fluoride uptake analysis. The fluoride analysis were taken at enamel-restoration interface and dentin-restoration interface by electron probe micro-analyzer. The results are as follows: 1. The depth of outer lesion of Fuji Filling
Dyract AP, Beautifil II was shallower than that of
Z250 at the margin of restoration(p<0.05). 2. The thickness of caries inhibition zone of Fuji Filling
, Dyract AP, Beautifil II was greater than that of
Z250 at the margin of restoration(p<0.05). 3. Fuji Filling
, Dyract AP, Beautifil II groups showed the greater fluoride uptake into enamel and dentine around restoration than
Z250 group. 4. In dentin the difference of fluoride concentration were greater than in enamel, and Dyract AP showed the greatest fluoride concentration in dentin.
THE EFFECT OF OXYGEN INHIBITION ON INTERFACIAL BONDING BETWEEN COMPOSITE RESIN LAYERS
Choi, Su-Mi ; Park, Jae-Hong ; Choi, Sung-Chul ; Kim, Kwang-Chul ; Choi, Young-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 298~307
The purpose of this study was to assess the effect on oxygen inhibition layer(OIL) for the interfacial bonding between resin composite layers, including shear bond strength, fracture modes and degree of conversion. The first layer of specimen was filled with Z-250(shade A3) and was cured for 40s. The second layer of specimen was filled with same composite(shade A1) and was cured for 40s. The first layer of specimens for each group were prepared by methods as followings. Control(curing in atmospheric air), Group1(curing against Mylar strip), Group2(scrubbed with a acetone-soaked cotton), Group3(using Tescera light cup), Group4(using Tescera heat cup), Group5(stored in disti1led water for 30days at
), Group6 (using bonding agent). The results were as follows: 1. There was no statistically significant different shear bond strength between control and group 1(p>0.05). 2. Group 2 showed significantly lower shear bond strength than control and group 1(p<0.05). 3. The observation of the fracture surface leads to the evidence that a major difference occurs in the case of control, group1 and group 3 samples which break mainly cohesively while the other groups break in majority adhesively. 4. The results of FTIR showed that the degree of conversion was the highest in group 2 and the lowest in control group(p<0.05). It can be concluded that an OIL is not necessary for bonding with composite resin. But if a reduced critical amount of the unreacted monomer is present, it was detrimental to bonding additional layers of composite. Further study, such as the quantitative analysis of the unreacted monomer are required.
THE ADHESION OF ODONTOBLAST TO TYPE I COLLAGEN
Ahn, Myung-Ki ; Jeong, Tae-Sung ; Kim, Shin ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 308~316
Odontoblasts are anchorage dependent cells adhering to a substrate via cell adhesive molecules. Receptor ligands such as integrins bind to these proteins and are known to function as signal transduction molecules in a series of critical recognition events of cell-substratum. The aim of this study is to examine the interaction of odontoblast (MDPC-23 cell) with type I Col and the effect of TGF-
on the expression of cell adhesion molecules. In this study, MDPC-23 cells adhered to type I Col dose-dependently. Immunofluorescence data demonstrated that integrin
and CD44 were expressed on cell surface, and FAK and paxillin were localized in focal adhesion plaques in MDPC-23 cells adhesion to Col. Cytokine TGF-
increased the adhesion of MDPC-23 cells to Col and the expression level of integrin
and chondroitin sulfate on MDPC-23 cells. RT-PCR data demonstrated that cytokine TGF-
increased the amount of integrin
mRNA in MDPC-23 cells. Therefore, MDPC-23 cells adhere to collagen type I Col and expressed a complex pattern of integrins and proteoglycans, including
, chondroitin sulfate and CD44 detected by immunoblotting and immunofluorescence assay. TGF-
treatment enhanced the expression of adhesion molecules such as integrin
and chondroitin sulfate.
A PATTERN OF THE FORMATION AND ERUPTION OF FIRST PERMANENT MOLARS
Jeong, Hae-Kyoung ; Yang, Yeon-Mi ; Kim, Jae-Gon ; Baik, Byeong-Ju ; Soh, Yu-Ryeo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 317~327
Among the permanent teeth, the first permanent molars play the greatest role in occlusion and function. So, early diagnosis for congenital missing, abnormal eruption and abnormal formation is very important to the first permanent molars in the course of arch development. The aim of this study is to analyse the differences between right and left first permanent molar's formation and eruption and between upper and lower one. A total of 545 children were selected am ong children who had visited our clinic, investigate eruption and calcification stage of permanent first molar, based on Gleiser and Hunt criteria for this study. 1. Gingival emergence of mandibular first molar is faster than maxillary first molar by 0.75~0.8 years, gingival emergence of maxillary first molar in girls faster than boys by 0.45 years, and that of mandibular first molar in girls faster than boys by 0.5 years. 2. There is the significant difference between right and left first molar on the eruption score and the calcification stage ; 5 year old children show the significant difference on the eruption score. 7 year old children show the significant difference on both the eruption score and calcification stage. 3. It shows the most active eruption movement of crown on the maxilla while the root is rapidly widening its furcation and completing root formation to 2/3, on the other hand, the most active crown emerging on mandible is shown when the root formation completed to 1/4 to 1/2.
A STUDY ON THE TRAUMATIC INJURIES TO PRIMARY TEETH
Chung, Youn-Joo ; Kim, Kwang-Chul ; Park, Jae-Hong ; Choi, Sung-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 328~337
The purpose of this study was to research the traumatized primary teeth and investigate following factors: sex, age, cause, place and time(of the year) of injury, elapsed time, area and type of injury, dental treatment and prognosis. The analysis includes total of 1533 traumatized primary teeth from 758 children aging from 6 months to 6 years(mean age: 2.8) from 2003 to 2007. The result follows : 1. The children of age between 1-2 and 2-3 were involved in the largest number of injuries in both sexes with boy/girl ratio of 1.77:1(p<0.001). 2. Fall and collision were the main causes of traumatic dental injury, especially in younger children(p<0.05). Places of injury occurrence varied: home, outdoors, and kindergarten. Warm climate accounts for frequent outdoor injuries in May, September and October(p<0.001). 3. Most of the children visited dental clinic within 24 hours of the injury(77.6%). From March to September, dental trauma occurrences were distributed evenly, except for Winter period(p<0.001). 4. Upper central incisors were the most commonly affected teeth, and the injuries usually involved 1 tooth or 2 teeth. 5. Periodontal tissue injuries dominated and subluxation was the most common type. Lateral luxation, enamel fracture, intrusion and root fracture followed.
EFFECTS OF CHILDREN'S TONSIL SIZE ON THE BEHAVIOR DURING PEDIATRIC DENTAL SEDATION
Kim, Hyeon-Ji ; Baek, Kwang-Woo ; Mah, Yon-Joo ; Jung, Young-Jung ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 338~344
The purpose of this study was to evaluate the effect of children's tonsil size on the behavior during pediatric dental sedation. The sedation records of thirty five children were examined in this study. All the sedations had been performed using chloral hydrate/hydroxyzine, nitrous oxide/oxygen or/and submucosal midazolam, and the subjects were divided into 4 groups according to their tonsil size using Brodsky's tonsil classification. The results were as follows: 1. The patients with enlarged tonsils showed negative behaviors in all behavior rating aspects(sleep, movement, crying, overall behavior) during sedation than those with normal tonsils(p<0.05). 2. Enlarged tonsils were correlated with mouth breathing(p<0.05) but not with snoring and coughing(p>0.05) during sedation. 3. For the patients with enlarged tonsils, significantly higher doses of midazolam were administered during sedation than for those with normal tonsils(p<0.05).
A STUDY OF MICROLEAKAGE AND PENETRATION ABILITY OF A PIT AND FISSURE SEALANT APPLIED ON CARIOUS FISSURES
Im, El ; Lee, Sang-Ho ; Lee, Nan-Young ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 345~351
The purpose of this study is to compare microleakage and penetration depths of sealants applied in carious and sound fissures. Extracted premolars(n=80) were divided into 4 groups according to caries status. 1; sound, 2; stained, 3; initial caries, 4; enamel caries. Sealants were applied to the occlusal groove as per manufacturers' instructions, and specimens were thermocycled, stained, sectioned, and examined for microleakage and penetration ability. The results of the present study are as follow: 1. It showed significantly higher microleakage scores in group I than group Two, Three, Four(p<0.05), but no significant difference was found between group Two, Three, and IV(p>0.05). 2. It showed significantly higher penetration scores in group Four (p<0.05), followed by group One, Two, Three, but no significant difference was found between group One, Two, and Three(p>0.05). Based on the results of present study, when the borders of the fissure sealant are on carious enamel, a significantly higher microleakage must be expected. It is considered that depth of enamel caries in the fissure should be taken into account when applying a fissure sealant.
THE EFFECTS OF CHEMORADIATION THERAPY FOR NEUROBLASTOMA ON DENTAL CARIES ACTIVITY
Lee, Ji-Hyun ; Park, Ki-Tae ; Sung, Ki-Woong ; Kim, Ji-Yeon ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 352~358
Chemotherapy or radiotherapy used for the treatment of pediatric cancer may have many adverse effects on the oral cavity. Oral mucositis, reduced salivary flow, oral infection, hypodontia, microdontia, arrested root development, and enamel hypoplasia are common oral complications. The aim of this study is to evaluate the effects of cancer therapy on dental caries activities. The children who had been treated for neuroblastoma in the department of pediatrics, Samsung Medical Center, were included and healthy children served as controls. The salivary flow rate, salivary buffering capacity, and Streptococcus mutans counts of both groups were evaluated using Dentocult
SM and Dentobuff
Strip. The dental caries activity related to the age at the start of treatment and the time elapsed since treatment completion were also evaluated. As a result, neuroblastoma patients had significantly lower salivary flow rate than the controls, while there were no significant differences between two groups as for salivary buffering capacity and Streptococcus mutans counts. The dental caries activities related to the age at the start of treatment and the time elapsed since treatment completion were not significantly different.
A STUDY ON THE DENTAL MATURATION IN CHILDREN WITH SKELETAL ANTERIOR CROSSBITE
Shin, Jong-Hyun ; Kwon, Min-Seok ; Kim, Shin ; Jeong, Tae-Sung ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 359~366
It was easy to find that children of a skeletal anterior crossbite in the early mixed dentition period showed a stark difference in the dental maturity between their maxillary and mandibular teeth, if they have stronger physical characteristics. If the difference of dental age between maxillary and mandibular teeth which can be identified via panoramic radiographs may serve as an early sign of class III malocclusion, this is considered valuable as a tool of early detection diagnosis. We obtained lateral cephalometric radiographs, panoramic radiographs, working model and clinical images of patients of Hellman dental age IIA and IIC who visited the department of pediatric dentistry, Pusan National University Dental Hospital and examined them to select 50 patents for normal occlusion group and skeletal anterior crossbite group, respectively. Their panoramic radiographs were used for the Demirjian's method to figure out dental ages of maxillary and mandibular teeth of each group and the eruption rate of the first molars. Their differences are as follows: 1. In both groups, the dental ages from Demirjian's method were advanced than the chronological ages. No sexual dimorphism was detected for the chronological or dental age in either group (p>0.05). 2. The difference of dental age of maxillary and mandibular teeth between the normal occlusion group and crossbite group was 0.22 and 0.69 years, respectively, with a higher difference in crossbite group(p<0.05). 3. Compared to the normal occlusion group, the crossbite group showed a higher difference in the eruption rate between maxillary and mandibular first molar(p<0.05).
CONSERVATIVE TREATMENT OF A UPPER CENTRAL INCISOR WITH POOR PROGNOSIS
Lee, Doo-Young ; Kim, Seung-Hye ; Choi, Hyung-Jun ; Choi, Byung-Jai ; Lee, Jae-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 368~373
The incisors function as instruments for biting and cutting food during mastication. They also support the lips and face and maintain vertical dimension. In addition, they contribute to overall normal arch appearance. They play important role during the articulation of speech and assist in guiding jaw closure. Extraction and space maintenance are the most common treatment for a tooth with poor prognosis. However, in the mixed dentition, extraction of the upper permanent incisors results in many complications, such as resorption of alveolar bone, poor esthetics, pronunciation, and mastication. Considering these various roles of incisors in oral cavity, approach for traumatized incisors, even the ones with poor prognosis, should be considered first prior to simple extraction. The dentist must take into account the age of the patient, growth potential, occlusion, oral hygiene status, economic status and motivation towards dental health in addition to patient compliance. In this case, although the prognosis was predicted to be unfavorable due to short root and mobility, we could save the central incisor using conservative treatment, reposition by orthodontic appliance instead of extraction.
TREACHER COLLINS SYNDROME : A CASE REPORT
Park, Ji-Hyun ; Kim, Seung-Hae ; Song, Je-Seon ; Kim, Seong-Oh ; Lee, Jae-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 374~380
Treacher Collins syndrome(TCS) is a rare, incurable condition occurring in approximately 1 of 25,000 to 50,000 births. It may occur as a spontaneous mutation out of genetically normal parents or it may be manifested as an autosomal dominant pattern. TCS is characterized by facial deformities such as, underdevelopment of the maxilla, mandible and zygoma, malocclusion, bilateral deformities of auricles, antimongoloid slant of the palpebral fissures. The syndrome is often associated with cleft lip and palate, ear malformations and hearing loss, short stature, and anomalies of the heart and skeleton. Respiratory difficulty associated with air way obstruction may also be observed, and there is considerable difficulty in airway management during general anesthesia. It is necessary that dentists provide safe dental treatments and guidelines to TCS patients by providing adequate understanding about the characteristics of the syndrome and proper ways of managements. The purpose of this study is to report the dental and medical characteristics of the patient who visited the Department of Pediatric Dentistry, Yonsei University for multiple dental caries treatment and to review the literatures of TCS.
INTENTIONAL REPLANTATION OF THE CROWN-ROOT FRACTURED TOOTH: A CASE REPORT
Kim, Soo-Kyoung ; Ahn, Seung-Tae ; Choi, Sung-Chul ; Kim, Kwang-Chul ; Park, Jae-Hong ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 37, issue 3, 2010, Pages 381~386
As the vertical fracture occurs at the various locations following the long axis of a root, treatment method of crown-root fractured anterior teeth is decided according to the depth. If the fracture line is close to the crown, gingivectomy, orthodontic - forced eruption or surgical extrusion of apical fragment could be done. If the line is over 1/3 length of the root, the prognosis is poor and extraction is usually undertaken. However, extraction of maxillary incisor at growing children causes many complications such as esthetic, phonetic problem and alveolar bone resorption. Therefore, preservation of tooth is the highest priority. Recently, intentional replantation with composite resin could be considered as alternative treatment of crown-root fractured anterior tooth. This report presents a patient in mixed dentition with deep vertical crown-root fracture of the maxillary permanent central incisors by trauma. Intentional replantation of the fractured teeth was performed using composite resin. After 2 years, specific clinical symptom has not been found and the patient was satisfied of esthetic result. This method suggests the new technique to preserve a tooth as an alternative to extraction, although it is technically sensitive and the reports of long-term prognosis is insufficient.