http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
제1대구치(第一大臼齒)의 맹출양장(萌出樣狀)에 관(關)한 연구(硏究)
손동수,Shon, Dong-Su 대한소아치과학회 1976 大韓小兒齒科學會誌 Vol.3 No.1
The author measured the degree of development and the eruption pattern of first permanent molars with orthopantomography in 553 Korean children(male; 302, female; 251) from 4 to 9 years old. The orthopantomographs were obtained from dept. of pedodontics, college of dentistry, Seoul National University. The results of the studies were as follows: 1. Upper first permanent molars were erupted with distal inclination of about 30 degrees in the early stage and they gradually moved in the mesial direction by bodily movement of the tooth to be in contact with the disto-proximal surface of primary secondary molars in the late stage. 2. Lower first permanent molars were erupted with mesial inclination in the early stage and moved mesially by tipping movement of the tooth to be in contact with the disto proximal surface of the second primary molars in the late stage. 3. The eruptive forces were considered to be main etiologic factors of space closure after the premature loss of primary molars.
박정삼,장기택,이상훈,김종철,손동수,김진태,한세현,Park, Jeong-Sam,Jang, Ki-Jaeg,Lee, Sang-Hoon,Kim, Chong-Chul,Shon, Dong-Su,Kim, Jin-Tae,Hahn, Se-Hyun 대한소아치과학회 1996 大韓小兒齒科學會誌 Vol.23 No.2
It has widely known for speech problem in patients with malocclusion, but there have been insufficient studies on degrees of severity. Patients with openbite and Cl III malocclusion usually have speech problem. It has widely known that fricative /s/is pronunciated most abnormally in Cl III malocclusion than any other consonant. Therefore 20 children with anterior crossbite were selected for study groups and 40 children with normal anterior occlusion were selected for control group. 7 sounds such as / 사(sa), 서($s{\delta}$), 소(so), 수(su), 스($s{\omega}$), 시(si), 세(se) / were recorded, and the formants and formants ratios were measured by using Sensimetric Speech Station, which is speech analyzing program in IBM PC. The results were as follows : 1. In anterior crossbite group, F1 of all 7 sounds were significantly higher than normal anterior relationship group(p<0.05). 2. There were no significant difference in F2 between two groups except / 소(so), 수(su)/(p>0.05). 3. In anterior crossbite group, F2/F1 ratio of all 7 sounds were significantly smaller than normal anterior relationship group(p<0.05). 4. There were no significant difference in accordance with tongue position(p>0.05).
손동수,김진태,이상훈,한세현,김종철,선예경 大韓小兒齒科學會 1993 大韓小兒齒科學會誌 Vol.20 No.2
The purpose of this study was to obtain roentgenocephalmetric norms of the Korean mixed dentition children which are used in the occlusal guidance treatment. The 121 subjects(57 males and 64 females) were consisted of mixed dentition children who showed up in Department of Pediatric Dentistry Seoul National University Hospital from June 1990 till February 1993 and contestants of the Heathy Dentition Contest in 1992 and 1993. The subjects had normal profiles and occlusions without severe carious lesions or missing teeth. Following results were obtained from Sassouni, Ricketts and McNamara analysis; 1. Norms and standard deviations of the children were obtained. 2. ANS, upper incisor, pogonion, upper 1st molar and gonion were located posterior to their reference arcs and B was located anterior to its reference arc. 3. Lower anterior facial height was longer than upper anterior facial height and upper posterior facial height was longer than lower posterior facial height. Mandibular corpus length was longer than anterior cranial base length. 4. Anterior cranial length was longer in male(p<0.05) and mandibular corpus length was longer in male than in those of female(p<0.01). Porion was located more posterior in male than in those of female(p<0.05) 5. Effective mandibular length and lower anterior facial height were longer in male than in those of female(p<0.005). Effective midfacial length was longer in male than in those of female(p<0.05).
손동수,김정욱 大韓小兒齒科學會 1994 大韓小兒齒科學會誌 Vol.21 No.2
The ectopic eruption is defined rise to be abnormal eruption, which gives to displacement of the teeth and abnormal root resorption of adjacent teeth. The ectopic eruption of first permanent molar is approximately 2-4% of the population, most of them are in the maxilla, rarely in the mandible. In the case of the second permanent molars, most of them are found in the mandible for the reason of the arch length discrepancies and large size of the teeth. The ectopic erupted molars should be treated early in order to co-ordinate normal growth pattern and to obtain good occlusal support. So, this should be early diagnosed and treated. But, ectopically erupting molars are often self-corrected, hence periodic follow-up is required. The methods of the treatment are largely classified into surgical, surgical-orthodontic, and orthodontic method. Especially in orthodontic method, they are divided as follows ; appliances that is positioned at the contact point for unlocking and the distal movement, fixed and removable appliance that is connected to more than one tooth, and occlusion guiding method after disking or extraction of the second deciduous molar. The report presents the good results in treating patients, whose chief complaint was ectopic eruption of mandibular permanent molars.