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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 33, Issue 4 - Nov 2006
Volume 33, Issue 3 - Aug 2006
Volume 33, Issue 2 - May 2006
Volume 33, Issue 1 - Feb 2006
Selecting the target year
Generation of a monoclonal antibody against AgI/II, a cellular surface protein of Streptococcus mutans GS5
Cheon, Cheol-Wan ; Baik, Byeong-Ju ; Yang, Yeon-Mi ; Han, Ji-Hye ; Kim, Jae-Gon ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 587~596
Most of oral streptococci express the Antigen I/II (AgI/II) proteins, cell wall anchored adhesions. AgI/II protein binds to salivary agglutinin glycoprotein, a component of tooth pellicle and to ligands in other bacteria. These associations play important roles in bacterial colonization. Recently, it was reported that diverse host molecules also interact with AgI/II protein and that these interactions induce inflammatory responses from host cells. Among mutans streptococci containing -type hemolytic activity, Streptococcus mutans is a causative agent for dental caries. Compared with many other strains of S. mutans, GS-5 strain is unique in that this bacterium expresses truncated secretory AgI/II protein due to the nonsense mutation in the agI/II gene. This indicates that S. mutans GS-5 has a different clinical role and a recent report supported this idea based on the results from clinically isolated S. mutans strains. Previously, we had cloned agI/II gene from S. mutans GS-5 and generated recombinant N-terminal AgI/II protein. In this study, we further produced a hybridoma line expressing anti-AgI/II monoclonal antibodies named as 1C11A. This antibody showed high sensitivity to AgI/II protein in Western blot and ELISA. This new reagent will provide a basis for investigating the mechanisms of AgI/II-related diseases.
ER:YAG LASER-TREATED ENAMEL FOR PIT AND FISSURE SEALANT: A COMPARISON OF MICROLEAKAGE
Lee, Seon-Suk ; Lee, Nan-Young ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 597~605
It is introduced that pit and fissure sealant is the most universal and effective to prevent occlusal dental caries. In processing of being applied the pit and fissure sealant, the various kinds of methods are developed to remove organic matters, plaque, microflora and debris in the pit and fissure for increasing the rates of maintain the sealant. Recently, the Er:YAG laser has been used as a new enamel surface treatment method. The purpose of this thesis is compared whether that enamel surface treatment method is superior to other methods or not. 1. 100mJ 5Hz Er:YAG lased enamel surface was similar to acid-etched enamel in SEM evaluation. 2, Mechanical preparation showed decreased microleakage when compared with acid-etching only, but no significant differences in both method. 3. After laser and acid-etching method showed decreased microleakage when compared with acid-etching only.
EFFECT OF VARIOUS LINERS ON THE POLYMERIZATION SHRINKAGE OF COMPOSITE RESIN
Choi, Ji-Won ; Lee, Sang-Ho ; Lee, Nan-Young ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 606~614
The purpose of this study was to evaluate the polymerization contraction of composite resin(Tetric
, Ivoclar Vivadent Liechtenstein) according to various liners(Tetric
, Ivoclar Vivadent, Liechtenstein/
, DMG, German/
3M-ESPE, USA). The strain gauge method was used for measurement of polymerization shrinkage strain. Specimens were divided by 8 groups according to curing units and liners. Group A, E: Tetric
bulk filing, Group B, F: Tetric
filling, Group C, G:
filling, Group D, H:
filling. Group A, B, C and D were cured using the conventional halogen light(
3M ESPE, USA) for 40 seconds at
. Group E, F G and H were cured using light emitted diode(LED) light(Elipar Freelight
, 3M-ESPE, USA) for 15 seconds at 800
. Strain gauge attached to each sample was connected to a strainmeter. Measurements were recorded at each second for the total of 750 seconds including the periods of light application. Obtained data were analyzed statistically using Repeated measures ANOVA and Tukey test. The results of this were as follows : 1. Contraction stresses in flowable resin and glass ionomer lining group were lower than that in compomer lining group(p<0.05). 2, Contraction stresses in LED curing light groups were higher than that in halogen curing light groups, but there was no significant difference (p>0.05).
A STUDY ON THE RELIABILITY OF THE OPTICAL CARIES ACTIVITY TEST
Park, Cheol-Hong ; Lee, Nan-Young ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 615~623
The purpose of this study was to evaluate the specificity, sensitivity, and diagnostic power of caries activity test using LED fluorescence. The subjects of this study were 55 children of
years old. LED light were irradiated to labial or buccal surface of all teeth. Fluorescence from initial carious lesion of teeth illuminated by an LED light was observed through barrier filter and the number of teeth showing lesion, size and position of lesion were counted. Streptococcus mutans colony counting and dDfFtT rate test were also done and their correlation was compared. And then specificity, sensitivity, diagnostic power of optical caries activity test using LED light were evaluated. 1. There was positive
between LED fluorescence test and Streptococcus mutans count(P<0.05). 2. When visual examination was defined to standard testing method, the specificity, sensitivity, diagnostic power of LED fluorescence test were 100%, 76.1%, and 100%. 3. When dDfFtT rate was defined to standard testing method, the specificity, sensitivity, diagnostic power of LED fluorescence test were 88.9%, 47.8%, and 95.7%. 4. When S. mutans colony counting was defined to standard testing method, the specificity, sensitivity, diagnostic power of LED fluorescence test were 100%, 58.7%, and 100%. Considering the above results, optical caries activity test using LED light could be regarded as a practical method because of its close relationship with microbiological caries activity test.
Effects of plasma arc curing lights on the surface hardness of the composite resins
Lee, Soo-Won ; Yang, Kyu-Ho ; Kim, Seon-Mi ; Choi, Nam-Ki ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 624~632
In recent years, xenon plasma arc lamp was introduced for high-intensity curing of composite filling materials in direct resin restorations. In this study, two types of restorative materials, namely composites point
were selected and curing was conducted using a conventional halogen light and two plama curing lights. Two different resin composites were cured using the different units(
, Ultra-lite 180A, and
) and tested for microhardness. The purpose of this study was to test the hypothesis that exposure to a plasma curing lamp for 3, 6. 9 seconds is equivalent to 20 or 40 seconds of irradiation using a conventional halogen curing unit. 1.
and Ultra-lite 180A were able to polymerize point
at 6 seconds to a degree equal to that of the
(control) at 40 seconds. 2.
was able to polymerize
at 9 seconds to a degree equal to that of the
(control) on the bottom surface at 20 seconds. whereas Ultra-lite 180A could not do. 3. Two plasma curing units were able to cure the test-composites with bottom/top ratios approximately 61% to 96% at 3 to 9 seconds. There were some differences between the two composite brands, with
displaying less difference between top and bottom hardness values. For point
, at least 6 or 9 seconds were necessary to produce microhardness equivalent to that of the
curing at 20 or 40 seconds.
THE ABRASION OF SURFACE PENETRATING SEALANT BY TOOTH-BRUSHING
Song, Ju-Hyun ; Hahn, Se-Hyun ; Jang, Ki-Taeg ; Lee, Sang-Hoon ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 633~642
This study evaluated the surface changes such as surface average roughness(RA), surface free energy(SFE) and wear depth among groups treated with surface penetrating sealant(Fortify, Biscover), non treated polishing group before and after tooth-brushing, analyzing the influence of the sealants in filling of surface microdefects formed during the finishing and polishing procedures of composite resin. Results were as follow(p= 0.05) : 1. Ra was increased Biscover. Fortify and Polishing group. Before abrasion and in 6 months, all groups were statistically significant. In 1 month, 2 months and 3 months no statistical difference was noticed between Fortify and Biscover 2. SFE of Polishig and Biscover group. Fortify and Biscover group were statistically significant before abrasion. SFE of Polishing and Fortify group was statistically significant in 1 month. No statistical difference was noticed among groups in 2 months. SFE of Fortify and Biscover group was statistically significant in 3 months. Polishing and Fortify group, Fortify and Biscover group were statistically significant in 6 months. 3, Wear rate between Polishing and Fortify group was statistically significant in only 1 month. Wear rate between Polishing and Biscover group was statistically different in each month except for 2 month and so it was between Fortify and Biscover group. Considering film thickness of Fortify and Biscover, Fortify almost discappeared after 2 months and Biscover did after 6 months.
A MORPHOMETRIC STUDY OF THE MAXILLARY PRIMARY FIRST MOLARS USING THREE-DIMENSIONAL SCANNER
Lee, Jong-Beom ; Kim, Chong-Chul ; Hahn, Se-Hyun ; Lee, Sang-Hoon ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 643~652
The purpose of this study was to elucidate the size and morphologic characteristics of maxillary primary first molars in Korean children using three-dimensional laser scanner and compare three-dimensional image with preformed stainless steel crown. Scanned three-dimensional images of dental cast taken from 132 children(male 62, female 70) by three-dimensional laser scanner(Breuckmann opto-Top HE100, INUS, Korea) were used. Mesiodistal diameter, buccolingual diameter, occlusogingival height and crown shape of each image were calculated by Rapidform 2004 program(INUS, Korea). The values were statistically compared by independent samples t-test with 95% of significant level. The results were as follows : 1. No significant difference in crown size was found between left and right maxillay primary first molar(p>0.05). 2, Significant difference in mesiodistal diameter, buccolingual diameter, buccal occlusogingival height was found between male and female (p<0.05), and crown size of male was bigger than that of female. 3. Average image of maxillay primary first molar was shaped three-dimensionally and measured. In comparison with 3M stainless steel crown, this image was similar with No.4 or No.5 SS crown in male, No.4 in female. In comparison with ILSUNG SS crown, this image was similar with No.5 in male, No.4 in female. 4 Mesiolingual line angle area, distolingual line angle area and buccogingival ridge were more obvious in average image than 3M stainless steel crown. ILSUNG SS crown was more square and had longer mesiodistal diameter than average 3D image.
REMINERALIZATION EFFECT OF FUJI VII GLASS IONOMER CEMENT
Kim, Young-Jin ; Lee, Ju-Hyun ; Seo, Hyun-Woo ; Park, Ho-Won ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 653~660
Fuji VII is a glass-ionomer cement specially targeted for early protection in erupting first and second molars. Properties of Fuji VII such as very high level of fluoride release, low viscosity and no need to preliminarily etch the substrate would be useful to erupting molars with primary pit and fissure caries or hypoplastic area for preventive goal or remineralization. The purpose of this study were to evaluate remineralization of Fuji VII glass ionomer cement and to compare with one of other restorative materials such as conventional glass ionomer cement, resin-modified glass ionomer cement, compomer and composite resin. Forty-two extracted human molars were used for this study. All teeth were immersed in demineralizing solution for 48 hours after Class V cavity preparation was made on sound proximal surface. The teeth were randomly divided into six groups and restored with Fuji VII, Fuji II, Fuji II LC improved, F2000,
Z250 and control group was unrestored. The middle area with
thickness was separated from specimen using microtome and demineralized area was photographed under polarized microscope. Separated area was relocated to specimen and stored in artificial saliva, After four weeks, changes of demineralized area were observed and compared to them restorated immediately. The results from the this study can be summarized as follows ; 1. Fuji VII, Fuji II, Fuji II LC improved have more prominent remineralization effect than F2000,
Z250, control group. 2. No significant differences in remineralization effect are seen between Fuji VII and Fuji II, Fuji II LC improved.
STUDY ON THE SHEAR BOND STRENGTH OF ALL-IN-ONE DENTIN BONDING SYSTEM
Park, Hyung-Joo ; Yoo, Seung-Hoon ; Kim, Jong-Soo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 661~672
This study was performed to compare the shear bond strength of AQ Bond
. Also by observing the fractured interface under scanning electro-microscope, the fracture pattern and the quality of hybrid layer were analyzed. The possibility of clinical application of all-in-one system which has an advantage to reduce chair time for children with difficult behavior pattern was evaluated, The results obtained are as follows ; 1. There was no significant difference between AQ
and AQ Bond
in shear bond strength and Single Bond showed the highest bond strength with statistical significant difference (p<0.05). 2. Adhesive fracture pattern was mainly observed in both enamel/dentin in AQ
and AQ Bond
group while Single Bond group showed equal numbers for cohesive and adhesive pattern. 3. Under scanning electro-microscope, resin tags observed in AQ
and AQ Bond
were very weak and tangled while strong and thick tags were shown with many lateral branches in Single Bond. Careful case selection and accurate clinical application is recommended when using AQ
and AQ Bond
considering the result showing its weaker strength than Single
THE CHANGES IN PRACTICE PATTERN AND PATIENT DISTRIBUTION FOR LAST 5 YEARS(2000-2005) IN THE DEPARTMENT OF PEDIATRIC DENTISTRY AT SEOUL NATIONAL UNIVERSITY DENTAL HOSPITAL
Choi, Eun-Jung ; Jung, Tae-Ryun ; Kim, Chong-Chul ; Kim, Young-Jae ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 673~677
The spectrum of pediatric dentistry has been changing recently, due to many socioeconomic changes and developments in dental materials. The purpose of this study was to recognize the changing pattern in pediatric dental treatment and to present the direction for pediatric dentistry in the future. Patient distribution and practice trends were reviewed based on the patient records of the department of pediatric dentistry, Seoul National University Dental Hospital, from 2000 to 2005. Results were as follows ; 1. In 2000, preventive treatments comprised 14.5%, restorative treatments 52.6%, surgical treatments 11.4% and orthodontic treatments 21.5%. In 2005, the percentages were changed to 12.1%, 38.3%, 13.7%, and 35.9% respectively, showing a decline in preventive and restorative treatments and an increase in surgical and orthodontic treatments. 2. In restorative treatments, the proportion of amalgam, stainless steel crown restoration and pulp treatments decreased, and that of glass ionomer and resin restoration increased. 3. The number of out-patients increased from 2000 to 2002, and decreased thereafter. 4. In 2005, the average age of patients decreased from that of 2000.
A clinical study of the width of attached gingiva in the deciduous, mixed and permanent dentitions
Kim, Ji-Yeon ; Jung, Da-Woon ; Park, Ki-Tae ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 678~685
A certain width of attached gingiva is required to maintain gingival health The purpose of this study was to examine the dimensional changes in the width of attached gingiva and the depth of gingival sulcus among the deciduous, mixed and permanent dentitions and establish baseline information on the width of attached gingiva in Korean children. Eighty-eight children aged 4 to 14, who visited the Department of Pediatric Dentistry at Samsung Medical Center, were selected and divided into 3 groups according to the periods of dentition: deciduous, mixed and permanent dentitions. The width of keratinized gingiva and the depth of gingival sulcus were measured in each group with a periodontal probe and the width of attached gingiva was determined. The width of attached gingiva in maxillary and mandibular first molars increased significantly with age after eruption in the permanent dentition (p<0.05). The sulcus depth significantly increased in newly erupted permanent teeth with narrower width of attached gingiva (p<0.05) in all of the experimented teeth with the exception of the mandibular central incisor during the transition period. The results suggest that the mean width of attached gingiva does not increase steadily from the deciduous to the permanent dentition.
PERIODONTAL EVALUATION OF IMPACTED TEETH AFTER ORTHODONTIC TRACTION
Kim, Hyun-Jin ; Lee, Nan-Young ; Lee, Sang-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 686~692
The impacted teeth were surgically exposed by the closed-eruption technique and orthodontically retracted. The subject of this study are 24 patients(Mx. insiors; 10 Mx. canines; 14) who finished their treatment. The periodontal condition of the impacted teeth and the normally erupted proximal and opposed teeth were compared and analysed. The results are the followings ; 1. When the gingival index, plaque index, pocket depth and attached gingiva in periodontal evaluation were compared, there was no significant difference between the study group and the control group (P>0.05). 2. When the alveolar bone support of the mesial and the distal surface of the maxillary central incisors and proximal teeth was compared, there was no significant difference between the study group and the control group (P<0.05). 3. When the alveolar bone support of the maxillary canines was compared, there was no significant difference between the retracted teeth and the normally erupted teeth(P>0.05). The results above showed that the surgical exposure by closed-eruption technique followed by the orthodontic retraction of the impacted teeth has a positive influence on the regeneration of gingival tissue in clinical practice and is esthetically more stable. And it is considered that the clinicians should give attention to the direction of retraction power and the maintenance of normal shape of the alveolar bone in treatment of maxillary central incisors.
MICROTENSILE BOND STRENGTH ACCORDING TO DIFFERENT DENTIN WALL POSITION IN CLASS I CAVITY OF PRIMARY MOLAR
Lee, Hyeon-Heon ; Jung, Tae-Ryun ; Kim, Jung-Wook ; Jang, Ki-Taeg ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 693~698
In Class I cavity, the highest C-factor could be obtained and it means the highest polymerization shrinkage stress. In this study, high C-factor model was designed. The pulpose of present study was to determine differences of Microtensile bond strength (MTBS) of class I cavity pulpal and axial wall specimens in primary molar. Twenty clean mandibular 2nd primary molars were randomly divided into two groups Different composite Resins (Filtek Z250, 3M ESPE & Filtek Supreme, 3M ESPE) were bulk filled and photo cured. Axial wall specimens and pulpal specimens were prepared at the same teeth, All specimens were divided into 4 groups and MTBS were evaluated. Group ZP : Filtek Z250-Pulpal wall Group ZA : Filtek Z250-Axial wall Group SP : Filtek Supreme - Pulpal wall Group SA : Filtek Supreme - Axial wall The results were as follows: 1. Mean MTBS of ZP & ZA and SP & SA were significantly different(p<.001). 2. There was no significant difference between MTBS of ZP & SP and ZA & SA.
A STUDY ON THE DISTRIBUTION OF PARENTAL CONSULTATION ON THE WEBSITE OF KOREAN ACADEMY OF PEDIATRIC DENTISTRY AND THE DIRECTION OF IMPROVEMENT
Woo, Jue-Hyung ; Chung, Tae-Ryun ; Kim, Jung-Uk ; Kim, Chong-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 699~703
The purpose of this study was to analyze the parental consultations, patients' age and consulters. Also it was to improve the tendency of consultation homepage The subjects were 2485 questions on Korean Academy of Pediatric Dentistry Homepage except deleted questions which were not related with consultations. The examined contents were categorized into patients' age, counseling contents, consulters. The results were as follows: 1. Patients mostly belonged to preschool children(64.29%). 2. In the subjects, questions were mostly about growth and development, restorative and pulp treatment. 3. In the subdivided subjects, great part of questions were about tooth eruption, restorative and pulp treatment and trauma. 4. The 93.72% of consulters were mothers. 5. We should reinforce with FAQ about growth and development, restorative and pulp treatment and trauma. Also we should improve on quality of information and childcare related contents and Homepage related pediatric dentistry.
AUTOTRANSPLANTATION OF ECTOPICALLY ERUPTING MAXILLARY ANTERIOR TEETH
Son, Jeong-Min ; Kim, Seon-Mi ; Yang, Kyu-Ho ; Choi, Nam-Ki ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 704~709
Ectopic eruption should be understood as a change in the course of the normal eruption path of a dental bud at any moment in its origin. Transposition is a unique and extreme form of ectopic eruption. The treatment for ectopic eruption and transposition is various from simple observation to surgical exposure and orthodontic traction, according to direction of erupting tooth degree of developing root apex and eruption space etc. Autotransplantation is transplantation of tooth from one area of the mouth to another in the same individual or is moving a eruption tooth into extraction socket or surgically prepared socket, and autotransplantation is considered as a treatment of choice for the ectopic eruption when orthodontic traction is unable or when tooth movement is limited. These cases which were treated with autotransplantation of maxillary lateral incisor and maxillary canine were reported, and good esthetic and functional result were induced.
INTRAVENOUS SEDATION FOR UNCOOPERATIVE DENTAL CHILD PATIENTS
Park, Yong-Kyu ; Kim, Jong-Soo ; Kim, Seung-Oh ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 710~716
The purpose of this study is to evaluate the intravenous (IV) sedation technique with midazolam and ketamine for uncooperative dental child patients. Three child patients between the ages of 4.4 years and 5.6 years who required sedation for dental treatment were given midazolam and ketamine. Initial dosage was combined of
midazolam and 1.0mg/kg ketamine. Additional dosages of ketamine (0.33mg/kg) were given as needed to maintain deep sedation. Pulse rate, respiratory rate, blood pressure, oxygen saturation, adverse reactions, postoperative recovery and behavior were monitored with saturation pulse oximetry, ECG, NIBP and Cardiocap. In conclusion, the combination of midazolam and ketamine is efficacious in deep sedation for painful dental treatment. However, a significant drop in oxygen saturation was observed as a common adverse side effect. Therefore advanced airway management proficiency is required in order to achieve a successful IV sedation.
THE ESTHETIC RESTORATION BY OPEN-FACED STAINLESS STEEL CROWN IN PREMATURE LOSS OF MAXILLARY PRIMARY INCISORS
Lee, Jung-Jin ; Kim, Seong-Oh ; Lee, Je-Ho ; Choe, Hyeong-Jun ; Son, Heung-Kyu ; Choi, Byung-Jai ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 717~721
Premature loss of maxillary primary incisors often results from early childhood caries (ECC), trauma. While space maintenance in the posterior region is an important consideration when there is early loss of primary molars, the anterior segment appears to be stable, even with the early loss of several incisors, once the primary canines erupt. However, collapse of anterior arch integrity is evident in cases where incisor teeth are in a crowded dentition prior to extraction or lost before the eruption of the primary canines. So, when early loss of maxillary primary incisors, the aim of restoration is esthetics, speech problem, oral habit such as tongue thrusting than space maintenance. This paper reports that the esthetic problem due to premature loss of maxillary incisors can be successfully resolved by soldered open-faced stainless steel crown.
TRANSPOSITION OF THE IMPACTED PRIMARY SECOND MOLAR AND THE TOOTH GERM OF SECOND PREMOLAR
Kim, Song-Yi ; Choi, Seong-Chul ; Kim, Gwang-Chul ; Lee, Keung-Ho ; Choi, Yeong-Chul ; Park, Jae-Hong ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 722~727
Most of impacted teeth reported are permanent teeth. Impaction of primary tooth caused by primary failure of eruption is rare and the most of impacted primary tooth are second primary molars. The etiology of a primary molar impaction would appear to be a physical barrier, early ankylosis of the tooth, abnormal development of the primary molar germ or malposition of the successor bud. Transposition has been described as an interchange in the position of two teeth within the same quadrant of the dental arch. It is most commonly seen with canine and lateral incisor teeth, but is rarely associated with the primary dentition. The two cases show the transposition of impacted primary molar and the tooth germ of second premolar in their clinical and radiographic examinations. In case 1, lower second primary molar was deeply impacted inferiorly to the tooth germ suspected to be a second premolar. In case 2, impacted all second primary molars were positioned inferiorly to the tooth germs suspected to be the successors. We extracted all second primary molars under general anesthesia and the extracted tooth germs appeared to be second premolars.
SYSTEMIC REVIEWS AND META-ANANLYSIS IN RESEARCH OF THE EVIDENCE-BASED PEDIATRIC DENTISTRY
Lee, Kwang-Hee ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 728~737
The purpose of study was to introduce the method of systemic reviews and the meta-analysis as the statistical method of the systemic reviews. The resource of study was mainly the Cocharane Handbook for Systematic Reviews of Interventions. The first and most important decision in preparing a review is to determine its focus by asking clearly framed questions. Then searching for databases, quality assessment of the studies, collecting data, analysing and presenting results, and interpreting results fellow. The necessity and principle of meta-analysis were described and the methods of meta-analysis by the data types were summarised.
Molecular pathophysiology of dentinogenesis imperfecta
Kim, Jung-Wook ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 33, issue 4, 2006, Pages 738~742