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황병남,이승훈,이정근,이재봉,Hwang, Byung-Nam,Rhee, Seung-Hoon,Lee, Jeong-Keun,Lee, Jai-Bong 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.2
This study was performed to investigate the characteristics of soft tissue profile of the class III malocclusion and to test the yardstick far differential diagnosis between surgical and orthodontic patients. Initial lateral cephalograms of orthodontic group(30 patients) that have acceptable occlusion and profile by orthodontic treatment alone and surgical group(30 patients) that have favorable occlusion and profile by combined surgical-orthodontic treatment were selected in Ajou university hospital. Powell and Burstone II analysis were made on the tracing. Descriptive, comparative, factor, cluster, and discriminant analysis were carried out with computer program. The results were as followings : 1. Patients who received surgery had a more concave profile and a longer lower facial height than patients who received orthodontic treatment alone. 2. Nasolabial angle, ratio of vertical height, and mentolabial sulcus were significantly different at the 5% level. And facial protuberance, upper lip protuberance, mentocervical angle, nasofrontal angle, nasomental angle, mandibular vertical height, angle between cervix and lower face, ratio of mandibular vertical height divided by cervical depth, ratio of vertical height between upper and lower lip, and maxillary protuberance were significantly different at the 1% level. 3. 8 factors were extracted and factor 2, 3, and 8 showed significant differences by factor analysis. 4. Orthodontic group (25) and surgical group (35) were classified by cluster analysis. 5. Discriminant function was D = 0.079Nasomental angle + 0.081Sn-Gn + 3.343Sn-Gn/C-Gn + 1.734Sn-St/St-Me' -26.460, and cutting score was 0, so we can discriminate that orthodontic group has the score above 0, and surgery group below 0. And 91.7% of original grouped cases were correctly classified.
전진 이부성형술을 동반한 하악지 시상분할골절단술에서 경조직 변화와 관련된 연조직 변화에 관한 연구
최은주,이정근,이승훈,황병남,Choi, Eun-Zoo,Lee, Jeong-Keun,Rhee, Seung-Hoon,Hwang, Byung-Nam 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.1
Purpose : The purpose of this study is to setup a standard treatment protocol in surgical correction of skeletal malocclusion with Angle Class III patients. We asessed the soft tissue changes according to skeletal changes of patients who have undergone orthognathic surgery with bilateral split sagittal ramus osteotomy (BSSRO) and advancing genioplasty. Materials & Methods : The soft tissue change of 9 skeletal Class III patients was assessed after BSSRO and advancing genioplasty. The patient group was skeletal Class III who was surgically treated by BSSRO & advancing genioplasty. The average follow up period is 13 months with the range of 6 and 30 months. All patients have undergone preoperative and postoperative orthodontic treatment. The assessment was devided into two groups. One was antero-posterior relationship and the other was vertical relationship of dimensional changes of soft tissue after orthognathic surgery. Results : In antero-posterior dimensional changes after surgery, the percentage of soft tissue change in comparison to hard tissue was 89%. Vertical ratio after surgery, 86% soft tissue changes were assessed.
급성 골수성 백혈병에서 발생한 흉추부 경막외 과립구육종 - 증례보고 -
박우민,장지수,이창훈,곽호신,이승훈,Park, Woo-Min,Jang, Jee-Soo,Rhee, Chang-Hun,Gwak, Ho-Shin,Lee, Seung-Hoon 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.11
Granulocytic sarcomas are solid tumors resulting from the localized proliferation of myelogenous leukions cells. Epidural involvement of granulocytic sarcoma is very rare in acute myelogenous leukemia(AML). We report a patient with a thoracic epidural granulocytic sarcoma whose presentation with acute paraparesis led to the diagnosis of relapsing of alleged AML. Early recognition of the etiology of the paraparesis and treatment with emergency decompressive, laminectomy, radiation therapy and chemotherapy resulted in an excellent neurological and hematological outcome.
Dentascan?瑛? 이용한 하악구치부의 하악관 위치에 관한 임상적 연구
김준철(Jun-Cheol Kim),이승훈(Seung-Hoon Rhee),이정근(Jeong-Keun Lee) 대한구강악안면외과학회 2002 대한구강악안면외과학회지 Vol.28 No.5
This study was designed to determine the location of the mandibular canal on lower molar areas. Thirty-three patients were examined with multi-planar reformatted CT scan(Dentascan). Three kinds of measurements were performed. The first was the distances between the upper border of the mandibular canal and the root apices of the first and second molars, the second was the distance between the cortical plate of the mandible and mandibular canal, and the last was the location of the mandibular canal in the buccolingual plane. The obtained results are as follows 1. The distance between the root apices of lower molars and the superior border of mandibular canal was largest at the mesial root of the first molar, and shortest at the distal root of the second molar(p<0.05). 2. The longest distance between the outer surface of the buccal cortical plate of the mandible and mandibular canal was measured from the distal root of the second molar, and this distance decrease gradually mesially( p<0.05). 3. The distance between the mandibular base and inferior border of mandibular canal was longest at the distal root of the second molar, and shortest at the mesial root of the first molar(p<0.05). 4. The location of mandibular canal was lingually positioned in relation to the axis of teeth and alveolar ridge in molar areas.
박제석(Jei-Seog Park),이승훈(Seung-Hoon Lee),이필규(Phill-Kyu Rhee) 한국정보과학회 1995 한국정보과학회 학술발표논문집 Vol.22 No.2A
시각장애인들은 정보를 습득하고 전달하는데 있어서 점자를 사용한다. 그런데, 대부분의 정안인은 점자표기법을 모르기 때문에 시각장애인과 정안인 사이에 정보의 흐름이 원만하지 못하다. 본 논문은 점자문서를 영상으로 입력받아 인식해서 정안인에게 묵자(한글)로 보여주거나 음성으로 출력할 수 있는 점자 인식시스템의 기반기술에 해당하는 점자 인식기에 대한 연구이다. 점자문서는 색상이 없지만 오목점과 볼록점이 스캐너 램프에 의해서 그림자를 만들기 때문에 그림자 명도영상을 얻을 수 있다. 제안된 방법은 명도영상으로부터 연결화소 집단의 모양과 크기를 분석해서 볼록점을 추출한 다음, 점자표기법의 규칙성을 이용하여 추출된 볼록점들을 6점으로 구성하고 점자 코드를 생성한다. 점자문서는 시각장애인용 국민학교 5학년 2학기 사회과탐구 교과서로부터 임의로 추출해서 사용했으며 매우 높은 인식률을 얻었다.
척추 전이암 및 골수종 환자를 대상으로 시행한 경피적 척추체 성형술
박우민,장지수,이창훈,곽호신,이승훈,Park, Woo-Min,Jang, Jee-Soo,Rhee, Chang-Hun,Gwak, Ho-Shin,Lee, Seung-Hoon 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.11
Objectives : In spinal metastasis and myeloma, percutaneous vertebroplasty could be an effective treatment method to provide spinal stabilization and to relief pain for early rehabilitation. The authors report twenty-five cases the clinical results of percutaneous vertebroplasty for twenty-five cases of spinal metastasis and myeloma. Materials and Methods : From September 1998 to December 1999, seventy percutaneous vertebroplasties(PVP) were performed for spinal metastases and myeloma in 25 patients, sixteen women and nine men ranging in age from 34 to 74. The primary malignancies were 6 multiple myelomas, and in metastatic tumore from various origin. All patients complained of severe pain and had osteolytic vertebral body destructions without spinal cord compression. To evaluate clinical improvement, suObjective verbal analogue pain score(VAS) and Karnofsky performance scale(KPS) were used. Thin sliced(2mm-thickness) sectional computed tomography(CT) was performed before and after PVP. Plain X-ray film was followed up every 1 month to assess the vertebral column stability. Results : In 25 patients, a total of seventy PVPS were performed successfully : 6 cervical, 33 thoracic and 31 lumbar vertebrae. Most patients had clear improvement of pain after PVP ; mean as score was 8.1 and 2.9 before and after PVP, respectively. Improvement was maintained in most patients. No further collapse of treated vertebrae was observed(mean follow-up, 7 months). Leakage of PMMA was notod in the spinal canal(13 levels), neural foramen (2 levels), adjacent disk(15 levels), paravertebral soft tissue(14 levels) and vein(8 levels). Pulmonary embolism was detected in three patients after the procedure, but was not associated with clinical symptoms. Conclusion : These results indicate that percutaneous vertebroplasty can be valuable treatment method in osteolytic spinal metastasis and myeloma, providing immediate pain relief and spinal stabilization and contributing to early rehabilitation.