기능성 및 골격성 전치부 반대교합 환자의 형태학적 차이점에 관한 연구

유임학,김태선 대한치과교정학회 2001 대한치과교정학회지 Vol.31 No.4

본 연구의 목적은 기능성 및 골격성 전치부 반대교합 환자에 대한 형태학적 차이점을 비교하는 것이다. 전치부의 기능성 반대교합을 보이는 28증례와 골격성 반대교합을 보이는 31증례를 각각 실험군과 대조군으로 삼았다. 실험군자 대조군의 평균연령은 9.6±1.8세와 9.8±1.9세이었다 측모두부방사선 사진을 촬영하였으며 두 군간의 형태학적 차이를 비교하기 위해 49개 항목에 대한 계측 및 통계학적인 분석을 시행하였다. 계측항목 중 cranial deflection, maxillary depth, ANB, convexty, NPo-AB, APDI, Mx 1-SN, Mx 1-NA angle, Mx 1-NA, Md 1-NB angle and Md 1-NB에서 통계학적인 유의차가 나타났다. 실험군에서는 Class III로의 성장 가능성, 상악골의 전방위치, 상하악골간의 전후방적 부조화 감소, 상악 중절치의 후퇴, 직립 및 하악 중절치의 전돌, 순측경사를 보였다. (주요 단어 : 형태학적 차이, 기능성 전치부 반대교합, 골격성 전치부 반대교합) The purpose of this study was to compare the dento-skeletal characteristics between functional and skeletal anterior cross-bite patients. Twenty-eight functional anterior cross-bite patients and thirty-one skeletal anterior cross-bite patients were selected as a test and a control group. Mean ages of the test and the control group were 9.6±1.8 and 9.8±1.9, respectively. Lateral cephalograms were taken. Forty-nine cephalometric variables were measured and statistical analysis was performed to find the morphological differences between the groups. Statistically significant differences were found in the cephalometric variables of cranial deflection, maxillary depth, ANB, convexity, NPo-AB, APDI, Mx 1-SN, Mx 1-NA angle, Mx 1-NA, Md 1-NB angle and Md 1-NB. The test group showed more Class III growth potential, more protruded maxilla, lesser maxillo-mandibular difference, more uprighted and retruded maxillary central incisor, more labially tipped and protruded mandibular central incisor. ※ Key words : Morphological differences, Funtional anterior cross-bite, Skeletal anterior cross-bite

개방교합 경향을 갖는 성인 여성 환자들의 보상양상에 관한 연구

유임학(Eem-Hak Yoo),김동언(Dong-Un Kim) 대한치과교정학회 2002 대한치과교정학회지 Vol.32 No.1

개방교합 경향을 갖고 있으나 보상작용 등에 의해 전치부 개방교합을 보이지 않는 성인 여성환자들의 보상양태를 관찰하여 진단 및 치료계획 수립에 도움을 주고자 본 연구를 시행하였다. 피개교합 심도지수(ODI)가 66이하이며 전치부 개방교합을 나타내는 증례 (50명)를 대조군으로, 피개교합 심도지수(ODI)가 66이하이나 보상작용에 의하여 전치부 개방교합을 보이지 않는 증례(55명)를 실험군으로 하였다. 대조군과 실험군의 평균연령은 각각 23.88 ± 4.53세와 24.7 ± 6.20세이었다. 측모두부방사선 사진을 촬영하였으며 두 군간의 형태학적 치아를 비교하기 위해 41개 항목에 대한 Mx1-SN, Mx1-FH, Mx1-NA(mm), Mx1-APo, PP to Mx6, Mn1-NB(degree), Mn1-NB(mm)에서 통계학적인 유의차가 나타났다. 실험군에서는 감소된 lower face heifht, N-Me, ANS-Me, ANS-Me/N-Me ratio와 상하악전치의 설측 경사 및 후퇴, 대조군에서는 상악 구치의 과맹출이 관찰되었다. The purposes of this study were to observe the compensation pattern of human female adults with openbite tendency and to provide the decision criteria of the diagnosis and treatment planning for those patients. Fifty patients with anterior openbite and fifty-five patients without anterior openbite patients were selected as a control and a test group. ODI of the all patients was below 66. Mean ages of the control and the test group were 23.88 ± 4.53 and 24.7 ± 6.20 years, respectively. Lateral cephalograms were taken and forty-one variables were measured. To identify the morphological differences between the groups, statistical analyses were performed. Statistically significant differences were found in the measured variables of lower face height, N-Me, ANS-Me, ANS-Me/N-Me ratio, Mxl-SN, Mxl-FH, Mxl-NA(mm), Mxl-APo, PP to Mx6, Mnl-NB(degree), Mnl-NB(mm). The test group showed decreased lower face height, N-Me, ANS-Me, ANS-M -Me ratio, more uprighted and retruded maxillo-mandibular incisors. Overeruption of the maxillary first molar was found in the ontrol group.

측두하악장애 환자의 임상적 양태에 대한 연구

김두용,유임학(Eem Hak Yoo) 대한턱관절교합학회 2001 구강회복응용과학지 Vol.17 No.4

치근단 병소의 임상적 연구

김상우,우순섭,유임학,이영수,심광섭 대한악안면성형재건외과학회 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.3

The purpose of this study was to find the clinical features of periapical lesions. A total of 130 periapical lesions which were obtained from biopsy and diagnosed histopathologically as periapical cyst, periapical abscess, and periapical granuloma at the Department of Dentistry in Hanyang University Hospital were throughly analysed according to the distribution and incidence of age, sex, location, and so on. The following results were obtained : 1.Out of 130 periapical lesions, 88 cases(67.7%) were periapical cysts, 30 cases(23.1%) were periapical abscesses, and 12 cases(9.2%) were periapical granulomas. 2.The periapical lesions occurred most frequently in the third decade, and followed by the fourth, fifth, sixth, and second decade. The periapical cysts occurred most frequently in the third decade(26.1%), the periapical granulomas in the fourth decade(33.3% ) the periapical abscesses in the sixth decade(26.7%). 3.The periapical lesions were more frequent in men than in women with the ratio of men to women of 1.4 : 1. The radio of men to women of periapical cysts was 1.6 : 1, that of periapical granulomas was 0.5 : 1, and that of periapical abscesses was 1.3 : 1. 4.The periapical lesions were more frequent in maxilla than in mandible with the ratio of 1.2 : 1. The ratio of maxilla to mandible of periapical cysts was 1.5 : 1, that of periapical granulomas was 0.5 : 1, that of periapical abscesses was 1 : 1. 5.The most commonly involved location of the periapical lesions was maxillary anterior teeth(40.8%), and followed by mandibular molars, mandibular premolars, and mandibular anterior teeth and maxillary molars. The most frequent location of the periapical cysts was maxillary anterior teeth(48.9%), that of periapical granulomas was mandibular molars(50.0%), that of periapical abscesses was mandibular molars(40.0%).

하악골비대칭 환자의 형태학적 특징에 관한 연구

이태희(Tae-Hee Lee),유임학(Eem-Hak Yoo) 대한턱관절교합학회 2001 구강회복응용과학지 Vol.17 No.4

성인 만성 측두하악장애 환자에서 전악각 함요 및 하악지 고경의 변화에 대한 연구

이영수(Young-Soo Lee),김동언(Dong-Eon Kim),유임학(Eem-Hak Yoo),우순섭(Sun-Sup Woo),심광섭(Kwang-Sup Shim) 대한턱관절교합학회 2001 구강회복응용과학지 Vol.17 No.1

진성 골격성 Ⅲ급 부정교합에서 두개저, 상악, 하악의 위치 및 크기에 관한 연구

우순섭(Soon-Seop Woo),최용수(Yong-Soo Choi),박원희(Won-Hee Park),유임학(Im-Hag Yoo),이영수(Young-Soo Lee),심광섭(Kwang-Sup Shim) 대한구강악안면외과학회 2002 대한구강악안면외과학회지 Vol.28 No.1

The facial patterns were expressed by the interrelation of variable factors such as heredity, function and environment. Such variable factors have an effect on the growth and development of maxillofacial bones. The malocclusions with skeletal discrepancies are caused by abnormal forms, sizes and positions of cranial base, maxilla and mandible. For the proper diagnosis and treatment planning, the analysis of such structures is necessary. Lateral cephalograms of 54 adults with class Ⅲ malocclusion patients (test group) and 61 adults with normal occlusion (control group) were analyzed. Anteroposterior relations and sizes of cranial base, maxilla, mandible were estimated to compare with those of normal ones. In test group, the anterior cranial base length was within normal range, but posterior cranial base, maxilla and mandibular body were longer than those in control group, significantly. Based on the cranial base, the location of maxilla in test group was normal, but the location of mandible was more anterior than that in control. Based on the maxilla, the location of mandible was more anterior in test group than that in control. Both mandibular body and ramus anteroposterior lengths in test group were larger than those in control. Both mandibular plane angle and upper gonial angle were within normal range, but lower gonial angle was significantly high in test group.

악교정 수술을 위한 한국인 하악지의 해부학적 위치에 관한 연구

우순섭(Soon-Seop Woo),조정연(Jung-Yeon Cho),박원희(Won-Hee Park),유임학(Im-Hag Yoo),이영수(Young-Soo Lee),심광섭(Kwang-Sup Shim) 대한구강악안면외과학회 2002 대한구강악안면외과학회지 Vol.28 No.2

Anatomical shape of the mandibular ramus, which includes the area from the rear of the mandibular second molar to the mandibular posterior border and from the mandibular sigmoid notch to the inferior mandibular border, must be carefully considered to perform orthognathic surgery. The locations of the lingula and mandibular foramen in medial side of mandibular ramus are one of the most important factors to decide the location of the horizontal medial osteotomy in sagittal split ramus osteotomy and to select the line of vertical osteotomy in intraoral vertical ramus osteotomy. Sixty-five different Korean human dry mandibles were surveyed. All mandible have permanent dentition including complete eruption of the mandibular second molar. The locations of the lingula and mandibular foramen in medial side of the ramus were identified and following results were obtained. Anterior ramal horizontal distance from lingula was 16.13±3.53mm(range:8.6-24.3mm), anterior ramal horizontal distance from mandibular foramen was 23.91±4.79mm(range: 14.1-39.7mm), horizontal width of mandibular foramen was 2.79±0.95mm(range: 1.5-6.1mm), height of lingula was 10.51±3.84mm(range: 3.1-22.4mm), vertical distance from sigmoid notch to lingula was 19.82±5.11mm(range: 9.1-35.3mm). From this study, the result could be used to select the location of osteotomy lines and to decide amount of periosteal elevation to avoid injury of neurovascular bundle, and to accomplish the appropriate split in Korean patients in mandibular orthognathic surgery.

구내고정원을 이용한 교정 치료중 miniscrew 탈락에 관한 연구

우순섭(Soon-Seop Woo),정순태(Soon-Tai Jeong),허영성(Young-Sung Huh),황경균(Kyung-Gyun Hwang),유임학(Im-Hag Yoo),심광섭(Kwang-Sup Shim) 대한구강악안면외과학회 2003 대한구강악안면외과학회지 Vol.29 No.2

At orthodontic treatment, we have made every effort to get rigid anchorage which is not stirred when teeth move. As a result, the miniscrew that is rigid anchorage was invented recently, and now it is used widely. Concerning the advantage of miniscrew, it is reduced dependence of extraoral anchorage and it shortens treatment time for rapid tooth movement. In contrast, the defect of miniscrew is falling off it resulted from increasing of the mobility. So the purpose of this research is to be of help to prognose clinical use of miniscrew, which is inserted for intraoral anchorage, by investigating and comparing the failure rate of miniscrew for loading time. This study researches the failure rate of miniscrew for teeth movement at the orthodontic treatment. The failure rate of miniscrew in mid course, after inserting 147 miniscrews in 51 patients, is 13%(20/147). It showed no statistically significant differences as compared man with woman, maxilla with mandible, double-head with uni-head miniscrew, and drilling and non-drilling before inserting the miniscrew. In comparison below twenties with over twenties and the times that we give load to miniscrew, it produced that the failure rate of miniscrew is 9.7% higher in the case of below the twenties than over the twenties. Also, the failure rate of loading immediately is 10.8% higher than loading after 7 days. According to using driver for the insertion of miniscrew, the failure rate of miniscrew is higher in the case of using machined driver than in the case of using hand driver when the level of significance is 95%. According to the research, we can suppose that the failure rate has no concern with using miniscrew on man or woman, maxilla or mandible, the shape of head, and drilling or non-drilling before insertion of miniscrew. Therefore, we can choose eclectic miniscrew as demands. In addition, we must notify the patient, below twenties, to be possibility of high failure rate. And It is strongly recommended to give load after 1􀅭2 weeks for healing of the insertion area.

교정치료시 전치부 후방견인에 이용하는 SAS의 효율성

우순섭(Soon-Seop Woo),정순태(Soon-Tai Jeong),허영성(Young-Sung Huh),황경균(Kyung-Gyun Hwang),유임학(Im-Hag Yoo),심광섭(Kwang-Sup Shim) 대한구강악안면외과학회 2003 대한구강악안면외과학회지 Vol.29 No.4

The retraction of anterior teeth could be performed more easier by inducing of skeletal anchorage system rather than by conventional method on orthodontic treatment. But, we wonder how effective the system draws well without anchorage loss and draws anterior teeth aside posteriorly, and if the system can reduce the time, in comparison with the anchorage of posterior teeth. For that reason we have studied on the subject of patients, who were required the maximum anchorage on orthodontic treatment and the cases without crowding. The subjects of the experimental group are 35 areas of 20 people who were inserted miniscrews after Mx or Mn 1st premolar extracted. Also, the subjects of the control group are 81 areas of 45 people who were not inserted miniscrews. Compared the anchorage loss of experimental group with control one, we could get the result that the anchorage loss of experimental group is 1.034±0.891mm and control group is 2.790±1.882mm(P<0.01). Compared the space closing time of experimental group with control one, we could get the result that the space closing time of experimental group is 369.40±110.81days and control group is 406.56±231.63days. But the result of comparing space closing time has no significance in statistics. We recognized that the experimental group is more faster than the control group in the canine retraction velocity from the result ; the speed of a experimental group has as much as 0.60±0.23mm/30days while the speed of a control group has 0.44±0.35mm/30days(P<0.05). So, we could convince that orthodontic miniscrew is used effectively in the cases required the maximum anchorage.