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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 10, Issue 1 - Jan 1983
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FACIAL GROWTH CHANGE AFTER ORTHODONTIC TREATMENTS IN CHILDREN
Sohn, Dong-Su ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 7~12
The author used cephalometric roentgenogram to observe the longitudinal change by orthodontic treatment for early class III malocclusion in primary and mixed dentition. First, the cephalometric roentgenograms were measured and following results were obtained 1. SNA, SNB, ANB, Gonial angle, and SN to mandibular plane were measured as skeletal pattern and
to mandibular plane and interincisal angle were measured as denture pattern. 2. Angular measurements for the Class III malocclusion were compared with those for the normal occlusion of the same Hellman dental age.
A Survey of the Oral Status in Handicapped
Lee, Keung-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 13~23
The purpose of this study was to make a comprehensive study and provide information about the oral status of handicapped. 874 (male: 540, female: 334) persons who are housed by 12 institution aged from 4 to 28 years in Seoul area was examined by considering the DMF rate, periodontal condition and occlusion. The obtained results were as follows: 1. Cerebral palsy, poliomyelitis, mental retardation, and blindness groups had a significant higher DMF rate than that occurring in any of the remaining groups. 2. Prevalence of periodontal disease in blindness, mongolism, cerebral palsy, poliomyelitis groups showed higher than that of the remaining groups. 3. Mongolism group had a significantly higher incidence of malocclusion (69.23%).
ELECTRON MICROSCOPIC STUDY ON THE PULP OF HUMAN PRIMARY TOOTH IN THE SHEDDING STAGE
Kim, Woo-Chul ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 25~33
With electron microscope, author studied on the pulp structure of human primary tooth in shedding stage. Non-carious human primary molar teeth were selected for this study. Using standard methods, specimens were sectioned and examined by light and electron microscope, The results were as follows; 1. In coronal pulp, odontoblasts were replaced by multinucleated odontoclasts, which contained a large number of mitochondria of varying shape and vacuoles in cytoplasm. Where odontoclasts were in contact with tooth surface, the characteristic ruffled border and clear zone were observed. 2. Fibrous tissue with plentiful collagen fibers and fibroblasts was observed adjacent to the dentin in the pulp. Fibroblast contained a number of mitochondria and well-developed rough-surfaced endoplasmic reticulum. 3. Inflammatory cells were observed in the pulp and active fibroblasts could be seen between inflammatory cells. In many cases, cervical epithelium proliferated toward absorbed area. 4. Inflammatory cells consisted of a number of lymphocytes, polymorphonuclear leukocytes, plasma cells and macrophages. Macrophage containing lysosomes in digestive state or phagocyting PMN could be seen. 5. In the primary molar of delayed root resorption, odontoblast layer, zone of Weil and cell-rich zone could be seen at roof of pulp chamber and odontoblast in this area cont과ained some lipid droplets.
A HISTOPATHOLOGICAL STUDY OF PULP TISSUE REACTION TO INTERMEDIATE RESTORATIVE MATERNAL IN YOUNG ADULT DOG'S TEETH
Choi, Don-Ok ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 35~45
This study was undertaken to evaluate the pulpal responses to the intermediate restorative materials such as Zinc phosphate cement, Polycarboxylate cement, IRM (zinc oxide eugenol cement), Dycal, Life, Cresatin, and Fluoride in caivties which were cut with high speed instrument. 5 dogs were used as experimental animals and devided into 8 groups. The intervals of observaobservation ranged 3 days, 1, 3, 4, 8 weeks after experiment respectively. The specimens were fixed with 10% formalin and decalcified in 5% nitric acid. All slides were stained with hemtoxylin-eosin and examined histopathologically. The results were as follows: 1. In control group, severe vacuolar degeneration and atrophy of odontoblasts were seen in 3 days, hemorrhage and congestion continued until 8 weeks. Necrosis of odontoblastic layer was seen in zinc phosphate cement group and polycarboxylate cement group. 2. In dycal group, vacuolar degeneration and atrophy of odontoblast were not seen. but in Life group, these were seen in 3 days and partially continued until 3 weeks. In 4 weeks, regeneration of odontoblast was occured. 3. In Crcsatin group, there was no pathosis except odontoblastic displacement. In Fluoride group, vacuolar degeneration of odontoblast was seen and soon disappeared. As compared with control group, pathological change of the pulp tissue in experimental group were decreased after amalgam restoration.
A STUDY OF THE RELATIONSHIP BETWEEN THE DIET CARIOGENICITY EVALUATION AND THE CARIES EXPERIENCE IN PRESCHOOL CHILDREN.
Kang, Jong-Mi ; Lee, Chung-Suck ; Lee, Jong-Gap ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 47~55
The authur surveyed the caries experience of 108 preschool children and collected their five-day dietary data, and evaluated the cariogenicity applied to their diets and discussed the relationship between their caries experience and their diet. The results were as follows: 1. As a frequency of consumption of cariogenic foods by degree of retentiveness, highly retentive foods like sugars and dried fruits had been taken once every 3 days, next highly retentive foods like confections and breads had been taken once everyday, slightly retentive foods like ice-creams and fermented milk also had been taken once everyday, and low retentive foods like soft drinks had been taken once every 6 days. 2. The highest caries experienced children ingested more frequently retentive foods like ice-creams, fermented milk and sugars than the lowest caries experienced children. 3. As a potential cariogenicity, the mean number of cariogenic ingestions in a day was 2.26, the mean retentiveness in a day was 5.93, and the mean cariogenicity score per ingestion in a day was 2.51. 4. The highest caries experienced children had higher values in the mean cariogenic ingestions, the mean retentiveness, and the mean cariogenicity score than the lowest caries experienced children.
A ROENTGENOGRAPHIC STUDY OF THE RANGE OF CONDYLAR MOVEMENT IN CHILDREN WITH YOUNG PERMANENT DENTITION
Goo, Young-Jae ; Lee, Keung-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 57~65
The purpose of this study was to investigate the range of condylar movement of children with young permanent dentition. Materials included 33 roentgenograms of 4 serial projections of TMJ by modified transcranial projection with Accurad 100. Four serial projections were taken in the centric occlusion, rest position, 1 inch open, and maximum open position. The results obtained from this study were as follows. 1. The condyle was located anteriorly in articular fossa at centric occlusion. 2. The condyle was moved forwardly and downwardly during mandibular movement from centric occlusion to maximum open position. 3. The pattern of condylar movement was similar in both sexes, but there were no sex differences in distance of condylar movement.
A HISTOMORPHOLOGIC STUDY ON THE RESORPTION AND SHEDDING OF PRIMARY TEETH
Kim, Cheol-Hoon ; Lee, Jong-Gap ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 67~76
The state of pulp and dental hard tissue during the process of resorption and shedding of 104 non-carious primary teeth was assessed by histomorphologic study. The teeth were extracted from the Korean school children aged 5 to 15 and classified into preshedding, shedding, delayed shedding groups according to the age of the child at the time of extraction, The results were as follows: 1. The inflammatory cell infiltration in primary pulp tissues occurred in 61.5% of observed teeth and were increased in the order of preshedding, shedding and delayed shedding stages. 2. The odontoclasts were appeared in 43.3% of observed teeth and were increased in the order of preshedding, shedding and delayed shedding stages. 3. The polymorphonuclear leukocytes and odontoclasts couldn't be observed in the exfoliated primary pulp tissues before the process of resorption has involved the root surface about 1.8mm subjacent to the cemento-enamel junction. 4. The intact root surface was the longest and largest in the preshedding stage. 5. The resorption process of primary teeth roots occurred mainly in the stage of preshedding and shedding stages. 6. There was a tendency of repair of resorbing root surfaces in the delayed shedding stage.
AN AUTORADIOGRAPHIC STUDY OF THE MICROLEAKAGE AROUND A PIT AND FIGURE SEALANT
Sohn, Jang-Sook ; Lee, Jong-Gap ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 77~83
The purpose of this study was to observe the microleakage of a pit and fissure sealant at the tooth-restoration interface. One hundred and sixty-seven extracted permanent and deciduous teeth were used and some simple mechanical pretreatment were done before etching. The degree of microleakage was assessed by
after 24 hours, and 2 months. The results were as follows: 1. Among total 167 teeth, 53 teeth (32%) were demonstrated the microleakage. 2. After 2 months the leakage was increased from 22 percent to 35 percent in permanent teeth, and from 32 percent to 43 percent in primary teeth. 3. The group treated by fluoride paste was demonstrated the largest leakage, 50 percent in primary teeth and 33 percent in permanent teeth. There are more leakage in primary teeth (38%) than permanent teeth (28%).
AN EXPERIMENTAL STUDY ON THE ETCHING PATTERNS AND THE PENETRATION OF THE COMPOSITE RESIN TO HUMAN DECIDUOUS ENAMEL ETCHED WITH PHOSPHORIC ACID
Shin, Wan-Young ; Lee, Keung-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 85~93
In one group that tested for the effects of grinding and etching on the deciduous teeth, S.E.M. examination on the ground or unground labial surface of deciduous maxillary central incisors were made after etching procedure with 40% phosphoric acid for 60 secs., 120 secs., 180 sees. each. In another group that tested for the degree of resin penetration to the ground and etched deciduous teeth, composite resin application was done to the ground deciduous maxillary central incisors that had been acid-etched for 30 secs., 60 secs., 90 sees., 120 sees., 180 secs. each. The tooth-resin specimens were cut at the middle 1/3 of the crown by 2mm thickness, and the adjacent tooth materials were demineralized by 10% hydrochloric acid, the author observed the tags of the resin replica with S.E.M.. Following results were obtained. 1. After 40% phosphoric acid etching, the unground deciduous enamel surface showed various types of etching pattern. 2. For the formation of regular micropores on deciduous enamel surface by acid etching with 40% phosphoric acid, the time over 120 secs. should be requested. 3. After 40% phosphoric acid etching, the ground deciduous enamel surface showed the same etching pattern that has been a preferential removal of prism peripheries despite different etching time. 4. On the ground group that etched over 60 secs. to 180 secs., the length of tags was
, with a mean of
A STUDY ON PERIODONTAL CONDITIONS AND TREATMENT NEEDS OF ADOLESCENTS IN SEOUL SPECIAL CITY AND KYOUNGKI-DO
Oh, Hye-Eun ; Cha, Moon-Ho ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 97~105
The author made a periodontal survey on 2,000 Korean adolescents in Seoul special city and Kyoungki-Do, to detect periodontal conditions and treatment needs. The obtained results were as follows: 1. 1.20% of adolescents had healthy periodontal tissues. 2. 11.95% showed only the gingival bleeding on probing, 66.55% had the calculus. 3. The proportions of adolescents with pocket depths about 4 to 5mm and over 6mm were 19.95% and 0.35% respectively. 4. Periodontal treatment need proportion showed 98.80% in oral hygiene instruction and 86.65% in oral prophylaxis; mean number of sextants affected was 2.96. 5. 0.35% was needed complex periodontal treatment. 6. In the sex and regional distribution, girls were slightly higher than boys in periodontal treatment needs and seoul than Kyoungki-Do; but the difference was not significant statistically.(p<0.05) 7. In the age distribution, periodontal treatment needs did not increase evidently with age; but comparing those for 15 years old with 19, the latter was slightly higher than the former.(p<0.05)
A STUDY ON THE RELIABILITY OF SPACE ANALYSIS IN MIXED DENTITION
Lee, Sang-Hoon ; Shon, Dong-Soo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 107~113
20 children who visited department of pedodontics, S.N.U. Hospital were examined and their study models were obtained. The data obtained from three groups of operator, three method, twice measurement, was analysed. The results of the study were as follow: 1. The Brass-wire method appears to be the least desirable of those examined for space predictions in all three groups of operators. 2. It appears that there is little clinical significance between Moyer's and Segmented-arch method in all three groups of operators. 3. The Moyers' method appears to be more easily conceptualized by inexperienced operators than the other two methods.
THE STATISTICAL STUDY OF MAXILLARY MEDIAN DIASTEMA
Lee, Sung-Joo ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 115~122
The author surveyed 2,082 schoolchildren (Male: 1,078, Female: 1,004) from 7 to 12 years old in "N" primary school in kwang Ju City, and studied on 304 schoolchildren (Male: 176, Female: 128) having maxillary median diastema. The results were as follows: 1. The prevalence of maxillary median diastema was 14.6%, and it showed the greater rate at the boys than at the girls and the highest rate at 8 years old in the both sexes. 2. The maxillary median diastema showed decreasing tendency with ageing. 3. The frenum distance in children without local factors showed no change and the divergent degree of maxillary median diastema showed decreasing tendency after the eruption of maxillary lateral incisors. 4. The rate of maxillary median diastema associated with local factors was 37.8% and it showed increasing tendency with ageing. 5. The prevalence of median diastema according to etiology was as follows; rotated tooth; 12.2%, supernumerary teeth; 10.9%, abnormal frenum; 9.5%, peg lateralis; 7.2%, open bite; 2.6%, abnormal pattern of interseptal alveolar bone; 2.6%, missing lateral incisor; 0.7%, tooth size discrepancy; 0.3%.
STATISTICAL STUDY OF THE FUSED TEETH IN THE PRIMARY DENTITION IN KOREAN CHILDREN
Lee, Ji-Fwa ; Lee, Jong-Gap ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 123~129
This study was designed to find out the prevalence d the fused teeth in the primary dentition and their successors. The clinical and panoramic radiographic examination was undertaken of 5226 children (male 2812, female 2414) attended department of Pedodontics, College of Dentistry, Yon Sei University, Seoul, Korea. The results were as follows; 1. The prevalence of the fused teeth in the primary dentition was 1.03 percent and female (1.2%) affected more frequently than male (0.89%). 2. Compare with the maxilla and mandible, the prevalence of the fused teeth were higher in the mandible than in the maxilla. 3. The fusion of the primary teeth were occured between central with lateral incisor in the maxilla, and central with lateral and lateral with canine in the mandible. 4. There were 33 cases (61%) of succeding teeth missing among 54 case of the rused teeth.
A STUDY ON THE FACTORS OF DENIAL ESTHETIC SELF-EVALUATION IN THE KOREAN STUDENTS
Cha, Chang-Seon ; Kim, Jin-Tae ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 131~138
381 students including elementary school boys 75, girls 76 & middle school boys 115, girls 115 were examined to study the factors of dental esthetic self-evaluation: as measured by questionnaire & dental examination. The following results were obtained: 1. In the case of the girls, the more severely rotated or displaced the upper anterior teeth were, the uglier they felt themselves. 2. The students showed the tendency to answer that they were satisfied or had no feeling one way or the other even though their teeth were less straight than others. 3. Most of the students could not relate their teeth to the over-all facial appearance. 4. In the case of the elementary-school-boys, they felt themselves ugly when the overjet & overbite were excessive: in the case of the middle-school-girls, they felt themselves ugly when the rotation & displacement of the upper & lower anterior teeth were severe. 5. Angle's classification showed no statistical significancy.
A BIOCHEMICAL STUDY OF
-ATPASE ACTIVITY IN HUMAN DENTAL PULP
Hwang, In-Sung ; Lee, Jong-Gap ;
THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY, volume 10, issue 1, 1983, Pages 139~147
This study was undertaken to evaluate the physiological roles & mechanism of
-ATPase in human dental pulp. Each specimen of dental pulp was obtained from the freshly extracted, freeze-dried 242 teeth.
-ATPase activity were measured by the release of inorganic phosphate & protein with Spectrophotometer. The results were as follows; 1. The
-ATPase activity were significantly increased in developing teeth. 2. The
-ATPase activity were significantly decreased in nonvital teeth. 3. The
-ATPase activity were significant decreased in deciduous teeth. 4. The
-ATPase activity didn't have relation with dental caries. 5. The
-ATPase were activated by either