유년기 안구적출술 및 방사선치료로 인하여 발생된 안와 열성장에 대한 재건 치험례

홍관석,김성문,김훈,임재석,최미숙,최성원,권종진 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.1

There are many reports of the surgical management for the craniofacial abnormalities arising from the irradiation of the head and face for treatment of childhood cancers. Since the mordern combined-modality theraphy for childhood cancers began in the late 1960s and the early 1970s, recent reports have described the occular, dental and maxillo-facial abnormalities after irradiation in long-term survivors of cancers of the head and face. The resultant deformities may be known to be difficult to reconstruct with surgical techniques. This paper describes the late reconstructive surgery for the unilateral orbital and malar hypoplasia after eyeball enucleation and irradiation during childhood to correct the facial asymmetry and expand the contracted orbital socket into the functional dimension for the retaining eyeball prosthesis with spherical implant. We reports the satisfactory preliminary results from the midfacial osteotomy through the supero-lateral orbital rim and malar bone and the antero-lateral repositioning with the autogenous bone grafting in 26 year-old female patient who will be planned to make the new eyeball prosthesis by the department of ophthalmology.

구개결 언어에 대한 Screening test와 설문조사의 비교분석

임재석,권종진,장현석,박영준,최철민,전상호,장수정 大韓顎顔面成形再建外科學會 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.6

Purpose : This study was carried out to evaluate the abnormalites of the speeches of the cleft patients and compare the results of the speech evaluations of a speech pathologist with those of parents. Materials and Methods: Eleven cleft patients' parents were questioned about their children's speech and then the speeches of the cleft patients were evaluated by a speech pathologist and their results were compared with those of parents. Results : Nasal emission was noted in twenty percent of patients, with thirty percent demonstrating hypernasality and all demonstrating no hyponasality and aspirate. And twenty percent of patients show hoarseness. There was no statistically significant difference in the sensitivities to nasal emission between the speech pathologist and parents (p>0.05). However the speech pathologist is more sensitive to hypernasality than parents(p<0.05).

임프란트 식립을 위한 상악동 거상술의 임상적 연구

임재석,권종진,장현석,이성재,이부규 大韓顎顔面成形再建外科學會 1999 Maxillofacial Plastic Reconstructive Surgery Vol.21 No.4

A variety of materials and procedures such as sinus floor elevation, sinus-lift graft, inlay bone graft using Le Fort I osteotomy, and onlay graft have been used to create adequate bone volume in the maxillary sinus for placement of endosseous implants in the posterior atrophic maxilla. Because of the frequent lack of bone in the posterior maxilla, sinus lift procedure has become a commonly practiced treatment modality. The 138 endosseous implants of 36 patients with sinus augmentation procedures performed in Korea University Hospital from January 1991 to December 1998 were summarized and analysed. The result of this study were as follows : 1. Age ranged from 39 to 57, with a mean of 50.7. 2. The mean survival rate for 138 implants with maxillary sinus lift procedure was 80.4%. 3. There was no corelationship between the fixture length, width and the survival rate. 4. The result showed that the healing period for 8-12 months was necessary if the residual alveolar bone height was less than 5mm. 5. Autogenous iliac corticocancellous block graft showed the most favorable survival rate(95%).

양악 수술후 상악전진에 의한 상순 및 비부의 연조직 변화에 대한 두부계측방사선학적 연구

임재석,최철민 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.3

In case of dentofacial deformity patient, Lefort I osteotomy and BSSRO are popular methods to correct the deformity. The purpose of this orthognathic surgery is to achieve esthetic facial appearance and proper function. Various articles have been reported on soft tissue change after orthognathic surgery in terms of esthetics. Especially a change of soft tissue in upper lip and nose is important to gain facial esthetic profile. To obtain accurate prediction of postsurgical esthetics, a proper understanding of relationship between maxillary surgical movement and soft tissue change. In other words, it is very helpful in treatment planning and progonsis of orthognathic surgery to predict soft tissue changes related to hard tissue chamge. A retrospective study of selected patients was undertaken to estimate and analyze the changes of soft tissue in upper lip and nose following surgical correction with Lefort I osteotomy and BSSRO. Preoperative, postoperative, and retention period data derived from lateral cephalometric analysis.

전치부 개교합을 가진 골격성 제 Ⅲ급 부정교합 환자에 있어서 하악지 시상분할 골절단술후 술후 안정성에 관한 평가

임재석,권종진,장현석,손형민,남영원,최철민 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.6

The purpose of this study is to assess the postoperative stability and the tendency of relapse after both sagittal split ramus osteotomy in skeletal class III with anterior open bite. This retrospective study was based on the examination of 15 patients, 6 males and 9 females, with a mean age 23.1 years. The patients were divided into two groups based on the amount of preoperative overbite(group I:<1mm, group II:≥1mm). Serial lateral cephalometric radiographs were taken within 2 weeks preoperatively, within 1 week postoperatively and at a follow up period that ranged from 7 to 24 months postoperatively. All cephalometric radiographs were traced and digitized using the Quick ceph image Pro for analysis. And then, horizontal and vertical changes of reference points(B point, Pogonion, L1) were assessed by the linear measurements in millimeters on both axes. The results were as follows : 1 Mean horizontal relapses were 0.67±0.93mm (11%) at B point (P<.05) and 0.81±1.01mm (13.2 %) at Pogonion (P<.01). 2, Mean vertical relapses were 0.63±1.62mm (33.3%) at B point and 0.53±1.95mm (31.4%) at Pogonion (P>.05) 3. The mean angular change of occlusal plane to SN was 0.24±1.19 (P>.05) and that of mandibular plane to SN was 1.03±1.85 (P<.05). 4. There was correlation between the extent of preoperative overbite and the postsurgical relapse at B point and Pogonion. 5. There was no correlation between the amount of surgically produced horizontal movement and the postoperative horizontal relapse at B point.

HRTF(머리저달함수)의 샘플링률 변환에 따른 입체음향 플레이어

오재경,이동재,임철수,최범석,이원돈 호서대학교 반도체제조장비국산화연구센터 2001 반도체장비학술심포지움 Vol.2001 No.-

본 논문에서는 3D사운드 생성 기술 중 대표적인 방법인 원음에 HRTF(머리전달함수)를 콘볼루션(convolution하는 방식으로 음상정위 모듈을 구현하였으며 음장감을 부여하기 위하여 잔향(reverberation)효과를 추가하고 크로스토크 현상을 제거하기 위하여 트랜스오럴 필터를 추가하였다.본 논문에서는 sampling rate conversion을 사용하여 decimation과 interpolation을 수행하여 44.1KHz의 sampling rate로된 coefficient를 downsample하거나 upsample한 HRTR(머리전달함수)를 사용하여 콘볼루션(convolution)을 수행했다.본 논문에서는 3D사운드 생성과정에서 필요한 연산과정을 최소화하여 일반 PC의 computing power로도 sampling rate conversion된 데이터를 처리하여 줄 수 있는 알고리즘을 제시하고 구현하였다.

교육방송 TV 프로그램 시청자 요구분석

임재석,이영림 한국교육정보방송학회 2001 교육정보미디어연구 Vol.7 No.1

본 연구에서는 초·중·고등학생을 대상으로 텔레비전 시청형태와 기존 교육방송 프로그램에 대한 인지도 및 프로그램 내용에 대한 요구에 대해서 알아보았다. 이에 따라 수용자의 다양한 요구를 객관적으로 분석하여 현재 방송되는 프로그램에 대한 수용자의 의견을 향후 교육방송 프로그램 편성 및 제작에 대한 기초 자료를 제공하고자 하였다. 조사 내용은 학생들의 방송 프로그램 시청 습관, 교육 방송 프로그램 편성 요구, 교육 방송 프로그램 내용 요구, 교사들의 TV 활용 수업 의견 등 4가지 분야로 나누어 분석하였다. 분석 결과를 보면, 첫째, 초등학교 교과 프로그램은 자연과 영어 교과, 중학교 교과 프로그램은 사회와 영어 교과, 고등학교 교과 프로그램은 수리 탐구 영역(고 3 수학교과)과 외국어 영역(고3 영어 교과)을 증가해야 한다는 요구가 많았다. 둘째, 위성 TV 방송 출현으로 프로그램 방영 시간은 늘어났으나 시청 대상자의 방송 시청 시간이 증가한 것은 아니라는 점이다. 이유중의 하나는 프로그램을 흥미롭게 편성해 달라는 것이다. 다만 컴퓨터 정보 프로그램과 청소년 참여 프로그램을 중심으로는 시청율이 증가하고 있는 것으로 나타났다. 셋째, 시청자들이 교육방송 프로그램을 제대로 이해하고 활용할 수 있도록 적극적으로 홍보할 수 있는 방안이 강구되어야 할 것이다. The opinions of school students and teachers are very important in educational broadcasting program. They are the main users in educational broadcasting program. The purpose of this thesis is to suggest a new direction towards educational broadcasting programs, especially focussed on the need of school students and teachers. In order to conduct this research, the researcher analyzed literatures related to educational broadcasting system, program classification, the need , and the need analysis. To find the opinions of students and teachers, a survey was conducted to 6 elementary schools, 6 middle schools and 6 high schools in the Chung-Nam province, and the researcher especially collected and arranged the opinions of teachers who are working in the school related to this survey. The researcher was able to draw the following suggestions from the result of this study; 1. The programs should not be concentrated in educational programs, but should be broadened to the programs related to the things such as computer information and job. 2. The programs should be made with the format that students like, for example, animations or dramas. 3. A lot of marketing campaigns for educational broadcasting programs should be needed. 4. The study about the educational course programs should be continued to meet the needs of student audience.

한국인의 하악 제2 대구치의 교합면 열구 형태에 관한 연구

서규원,임재석 고려대학교 의과대학 1986 고려대 의대 잡지 Vol.23 No.2

In order to regenerate the more optimal occlusion of lower 2nd molars under the aim of repair the correct occlusal morphology, the groove morphology of "Y" form and "+" form which are different in the aspect of function and development, are studied statistically. The results are as follows: 1) In the comparison of "Y" form and "+" form, "Y" form of 688 individuals are more than the "+" form of 330. 2) In the comparison of male and female, "Y" form of male is 558 individuals and "+" form of male is 247, and "Y" form of female is 130 individuals and "+" form of female is 83. 3) In each form, 69.32% of male is more than the 61.03% of female in "Y" form disposition, and 38.97% of female is more than the 30.68% of male in "+" form disposition.

골격성 제3급 부정교합환자의 하악지 시상분할 골절단술후 하안면 폭경 및 고경의 변화에 대한 두부계측 방사선학적 연구

장현석,임재석,권종진,이부규,손형민 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.3

Purpose : The purpose of this study was to analyze the lower third facial changes in frontal view after mandibular setback surgery. Materials and Methods : In this study, fifteen subjects(6 males and 9 females) with class III dental and skeletal malocclusions who were treated with BSSRO(Bilateral Sagittal Split Ramus Ostetomy) were used. Frontal cephalometric radiographs were taken preoperatively and more than 6 months postoperatively, and hard tissue(H2-Hl) and soft tissue changes (S2-S1) were measured on vertical and horizontal reference lines. In 15 cases, changes which developed more than 6 months after surgery were studied. Results : The results were as follows. 1.In the facial height, hard tissue decreased(2.46±2.76mm) with statistical significance(P<0.01), and soft tissue also decreased(1.64±3.66mm). As a result, the facial height generally becomes shorter after sagittal split ramus osteotomy. 2.In the mandibular width, hard tissue decreased(2.08±3.59mm) with statistical sgnificance(P<0.05), but soft tissue increased (2.14±5.73mm) without statistically significant difference (P>0.05) postoperatively. 3.In the facial index, hard tissue decreased(0.23±2.21%), but soft tissue increased(2.41±3.46%) with statistical significance. Conclusion : One of the main purpose of orthognathic surgery is to achieve facial esthetics and harmony. In order to fullfill this purpose, it is important to carry out a precise presurgical treatment planning by estimating the changes of frontal profile after surgery.

성악골 절제술후 발생한 중앙부및 구개 결손부의 재건

김훈,임재석,최성원,김호겸,권종진,최미숙,김성문 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.1

There are various defects caused by trauma or resection of maignant tumor in the orofacial region, which can be reconstructed with various regional and pararegional flaps. Among these defects, it is very difficult to reconstruct palatal and midfacial defects after maxillectomy and patients have problems in speaking and swallowing of food. Therefore it is very important for surgeons to reconstruct these defects functionally and esthetically and to return the patients to the normal social activity. These defects are usually obturated with prosthodontic appliances to assist the phonation and swallowing. But nowadays surgical reconstruction by various flaps was considered and performed for better rehabilitation. For this purpose the forehead flap, the nasolabial flap, the tongue flap, the sternocleidomastoideous flap, the temporal flap, the latissimus dorsi flap, the scapular flap etc. are used. We reconstructed small-sized plalatal defects with tongue flap, medium-sized palatal and maxillary defects after maxillectomy with temporal myofascial flap and large midfacial defects including eyeball exenteration with latissimus dorsi myocutaneous flaps. Here we are to report 5 cases of these flaps used for the reconstruction of palatal and midfacial defects and consider the versatility, reliability and limitation in use of these flaps.