물리적 외력이 배양중인 치주인대세포에 미치는 영향

김현영,차경석 대한치과교정학회 1994 대한치과교정학회지 Vol.24 No.2

The movement of teeth during orthodontic treatment requires bone remodeling process in periodontal tissue. To find out changes occuring in the cell itself, mechanical force was applied to the cultured periodontal ligament cells. Following results were obtained from measuring the changes in cyclic AMP and PGE₂,³H-thymidine incorporation amount in time lapse after application of mechanical force. 1. When mechanical force was applied to cultured PDL cells, the amount of cAMP in cells were increased significantly after 15 min. of force application, but were decreased gradually as time lapsed. 2. When mechanical force was applied to cultured PDL cells, the amount of PGE2 were increased at 20,40,60 min. and was significantly increased at 20 min. 3. When mechanical force was applied to cultured PDL cells, the amount of ³H- thymidine incorporation was some increased, increased, but not statistically significant.

전치부 개방교합의 치료 한계

차경석 대한치과의사협회 1995 대한치과의사협회지 Vol.33 No.9

상악골 확장과 재발에 관한 연구

이영일,차경석 대한치과교정학회 1991 대한치과교정학회지 Vol.21 No.2

This research was carried out in order to study the effects of Rapid Maxillary Expansion on maxilla and it's surrounding skeletal structures. The sample for this study consists of 14 patients who were in retention period after rapid maxillary expansion. Following results were obtained after performing comparative analysis of cephalograms taken before and after rapid maxillary expansion. 1. In almost every cases, inferior displacement of palatal planes with concurrent changes in their inclination were observed. 2. Changes in the inclination of palatal plane can be categorized into inferiorly inclined group, superiorly inclined group and constant group in relation to the states before rapid maxillary expansion. 3. Decrease in < Se-FMN/PMV and increase in < Se-FMN-A were evident in the superiorly inclined group and vice versa for the inferiorly inclined group.

骨格型 Ⅲ級 不正咬合者의 第2 大臼齒 石灰化過程에 關한 硏究

車敬石 대한치과교정학회 1981 대한치과교정학회지 Vol.11 No.2

This investigation was designed to compare the calcification degree of maxillary second permanent molar to mandibular second permanent molar in skeletal Class Ⅲ Malocclusion. The material selected for this study consisted in standand lateral cephalogram study model and orthopantomogram of two hundred fifty seven Korean Children, one hundred twenty one boys and one hundred twenty four girls, aged 6 through 12 years, having skeletal Class Ⅲ Malocclusion. On the basis of findigs of this study, the following results were obtained 1. In the stage of completion of crown, there was no significant difference in calcification degree between maxillary second molar and mandibular second molar of both boys and girls in skeletal Class Ⅲ Malocclusion. 2. From 8 years of age at the stage of beginning root formation to 12 years of age, the calcification degree of mandibular second molar was more advanced than Maxillary second molar of both boys and girls in skeletal Class Ⅲ Malocclusion.

3급 부정교합 환자에서의 치료후 골격변화 양상에 관한 연구

정동화,차경석 대한치과교정학회 1996 대한치과교정학회지 Vol.26 No.3

교정치료는 치료 후의 분석이 이루어져야 그 성공여부를 평가받을 수 있다. 왜냐하면 교정치료는 환자자신의 고유한 균형을 변화시켜 또 다른 균형을 설정해가는 과정이기 때문이다. 그러나 1급이나 2급 부정교합에 비해 3급 부정교합 환자에 대한 연구는 미비하였다. 이 연구는 일반적인 교정치료시와 보정기간 중에는 어떠한 변화과정을 겪으며, 이들 중 재발양상을 나타내는 요소에 대하여 치료 전의 골격형태와 치료기간 중 변화량과의 상관관계를 알아보고자 시행하였다. 초진시의 Helleman dental age가 ⅢB이상이며 1년 6개월이상의 보정기간이 경과한 24명을 대상으로 하여 치료기간과 보정기간 중에 각항목의 변화량을 비교하고 이중 복귀현상을 나타낸 항목에 대한 상관관계를 분석하여 다음과 같은 결론을 얻었다. 1. FH plane에 대한 교합평면의 각과 하악평면의 각, 그리고 하악평면에 대한 하악 전치의 각은 치료기간중의 변화가 보정기간 중에 치료전의 상태로의 복귀현상을 나타내었으며 이중 교합평면각과 하악 전치의 치축항목은 치료기간중의 변화량과 역상관 관계를 나타내었다. 2. 치료 종료시 교합평면의 상방변위가 보정기간 중에 원래의 형태로 복귀하려는 경향을 보였으며 이는 치료기간 중에 변위량과 비례하여 나타났으나 기저골에 대한 상하악 대구치의 경사는 치료기간중의 변화량이 보정기간에 일정하게 유지되었다. 3. 보정기간 중의 하악평면각의 치료기간 중의 하악의 후하방 회전량이 클수록 감소하였다. This study was investigated the changes during treatment and retention period in the ClassⅢ malocclusion patients and explored the correlationship between factors that showed relapse tendencies and pre-treatment skeletal pattern and the changes during treatment period. Numbers of total sample were 24 and their Hellman's dental age at the start of treatment was over ⅢB and were retained at least over 1 year 5 months. The following conclusion were obtained by comparing the differences between treatment period and retention period, and after analysing the correlationship of factors that manifested relapse tendencies. 1. The angles formed by FH plane and occlusal plane, FH plane and mandibular plane, and mandibular incisor and mandibular plane changes showed rebound effect during retention period and among them occlusal plane angle and IMPA show reverse correlationship. 2. Upward displacement of the occlusal plane at the end of treatment has returning tendency, is proportional to the displacement during treatment period, but the angle between maxillary and mandibular 1st molar to its basal bone have been constantlsy maintained during the retention period. 3. Mandibular plane decrease during retention period and downward backward rotation during treatment period show correlationship.

齒周靭帶細胞의 生化學的 特異性에 對한 硏究

趙誠旭,車敬石 대한치과교정학회 1992 대한치과교정학회지 Vol.22 No.1

To find out the differences between periodontal ligament cells (PDL cells) and gingival fibroblast cells (GFB cells), alkaline phosphatase, a marker enzyme for osteoblast, was used to measure the activities and 45CaCl₂isotope was used to find out cellular and release of 45Ca, a requisite for bone formation, PDL cells and GFB cells from 1 to 5 passages were also measured in alkaline phosphatase activity assay. By the use of above methods, followings were concluded that the PDL cells and the GFB cells have characteristics that are different from each other. In that PDL cells showed large amount of calcium uptake ad large amount of calcium release in initial stage, they seem to possess characteristics which are similar to osteoblast-like cells. 1. The PDL cells, in contrast to the gingival fibroblast, showed exceedingly high alkaline phosphatase activity which was highest at the second passage, decreasing thereon. But gingival fibroblasts cells showed no distinct differences in alkaline phosphatase activity as the passage were elapsed. 2. For both PDL cells and GF cells, the 45Ca uptake was greatest at 2 hours period. The PDL cells showed higher measuring than GFB cells through out the whole time period. 3. Whereas the GFB cells showed slow increase of 45Ca release as time relapsed, the PDL cells showed rapid increase of 45Ca release.

Angle Ⅲ급 부정교합자이 악안면골격 특성에 관한 연구

유영재,차경석 대한치과교정학회 1991 대한치과교정학회지 Vol.21 No.2

This investigation was designed to categorize Angle's class Ⅲ malocclusion groups through analyzing horizontal and vertical components of craniofacial skeleton in Angle's class Ⅲ malocclusion. The material selected for this study consisted in standard lateral cephalogram of one hundred and fifty five children, seventy four boys and eighty one girls, aged 6 through 15 years, having Angle's class Ⅲ malocclusion. On the basis of findings of this study, the following results were obtained. 1. In horizontal skeletal classifications, 16 groups were classified FMN-A-B, SE-FMN-A according to the Ba-SE-Me, Ba-SE/R. 2. The sequences that have relatively high frequency are as follow; a) Horizontal Group 1 b) Horizontal Group 3 c) Horizontal Group 5 d) Horizontal Group 9 e) Horizontal Group 4 3. In vertical skeletal classification, 8 groups were classified according to the PMV/PP, PMV/OP, PMV/MP. 4. The sequences that relatively high are as follows; a) Vertical Group 1 b) Vertical Group 3 c) Vertical Group 4 d) Vertical Group 8

前齒部 開放咬合者의 顎顔面 骨格 特性에 關한 硏究

金美卿,車卿石 대한치과교정학회 1991 대한치과교정학회지 Vol.21 No.3

This study was performed to verify the craniofacial skeletal characteristics in anterior open bite group, incontrast to normal occlusion group, and also to find out, vertical factors which shows, correlate to the amount of anterior openbite. 21 individuals, including 10 males and 11 females, without orthodontic treatment history and anterior- posterior skeletal malrelationships, were selected and analyzed basic morphology and vertical factors, using standard lateral cephalogram. The obtained results as follows: 1.Comparison of anterior open-bite group with normal occlusion group using Moyers analysis. a)In basis morphologic analysis, Ba-SE-ME was lesser and Ba-SE-Mn.P.and Mn.P/A-B were greater in both sexes of anterior openbite group than in normal occlusion group. b)In angle measurements of vertical analysis, PMV/pal.P.was lesser in male anterior openbite group and PMV/Occ.P.and PMV/Mn.P.were greater in both sexes of anterior openbite group than in normal occlusion group. c)In height ratio of vertical analysis, ATFH/PTFH and ALFH/ATFH were greater in both sexes of anterior openbite group than on normal occlusion group. 2.The amount of anterior openbite was correlated with PMV/Occ.P.and PMV/Mn.p.

Soft-tissue thickness of South Korean adults with normal facial profiles

차경석 대한치과교정학회 2013 대한치과교정학회지 Vol.43 No.4

Objective: To standardize the facial soft-tissue characteristics of South Korean adults according to gender by measuring the soft-tissue thickness of young men and women with normal facial profiles by using three-dimensional (3D) reconstructed models. Methods: Computed tomographic images of 22 men aged 20 - 27 years and 18 women aged 20 - 26 years with normal facial profiles were obtained. The hard and soft tissues were three-dimensionally reconstructed by using Mimics software. The soft-tissue thickness was measured from the underlying bony surface at bilateral (frontal eminence, supraorbital, suborbital, inferior malar, lateral orbit, zygomatic arch, supraglenoid, gonion, supraM2, occlusal line, and subM2) and midline (supraglabella, glabella, nasion, rhinion, mid-philtrum, supradentale, infradentale, supramentale, mental eminence, and menton) landmarks. Results: The men showed significantly thicker soft tissue at the supraglabella, nasion, rhinion, mid-philtrum, supradentale, and supraglenoid points. In the women, the soft tissue was significantly thicker at the lateral orbit, inferior malar, and gonion points. Conclusions: The soft-tissue thickness in different facial areas varies according to gender. Orthodontists should use a different therapeutic approach for each gender.

拔齒 및 非拔齒 治療症例에서의 治療前後 齒列弓形態의 變化에 關한 硏究

韓泓,車敬石 대한치과교정학회 1991 대한치과교정학회지 Vol.21 No.1

This study was carried out in order to findout the amount of tooth movement, the changes arch size and the changes in arch morphology following orthodontic treatment and to provide a guideline for to predict post-treatment arch morphology. The sample group for this study consists of 15 males and 22 females, totalling in 37 persons, who received orthodontic treatment at Orthodontic Department of DanKook Univ. Dental Hospital. They are classified into Extraction Class I treatment group(E I), Non-extraction Class I treatment group(N I), and Non-extraction Class Ⅲ treatment group(N Ⅲ), according to their pre-treatment malocclusion state and methods of treatment. Following conclusions and averaged dental arch form for each group were obtained by cephalometric linear measurements and dental arch measurements using pre-and post-treatment lateral cephalograms and plaster study models. 1.Intercanine width were reduced in max, of both EI and NI during the period of treatment. 2.Intermolar width were reduced in max, of EI and increased in max, of NI. Therefore although there was no difference between these two groups before the treatment, intermolar width of the max, of NI was wider than that of E1 after the treatment. 3.PMV-incisor distance and PMV-canine distance were decreased in both max, and mand, of EI and that of NI, during the period of treatment, PMV-molar distance was decreased in both max, and mand, of NI and in mand, of NIII. 4.Items that showed stability during the treatment were: max& mand. PMV-molar distance, mand. intercanine and intermolar width in EI; mand. Intercanine and intermolar width in NI; mand.&max. PMV-incisor distance, PMV-canine distance, max. PMV-molar distance and max.& mand. intercanine and intermolar width in NIII. 5.The differences in averaged canine and molar variances to post-treatment dental arch form were present only in EI and in NI. There was no variance between maxilla and mandible in each group.