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임상 : 상모양세포성별세포종; 20명 환자들의 임상적 특징과 결과
허정우 ( Jung Woo Hur ),배정식 ( Jung Sik Bae ),양승호 ( Seung Ho Yang ),전신수 ( Sin Soo Jeun ),박춘근 ( Chun Kun Park ),김문찬 ( Moon Chan Kim ) 대한뇌종양학회 2011 대한뇌종양학회지 Vol.10 No.2
Objective: Most pilocytic astrocytomas (PA) are benign tumors. However, there can be a bad outcome according to the patient`s age, the degree of tumor resection and the location in which the established outcomes have not yet been reported. We therefore analyzed and evaluated the outcome and features of PAs in a retrospective study. Methods: We retrospectively analyzed 20 patients who were treated at our hospital between 1995 and 2009. Age, Karnofsky Performance Scale (KPS) score, tumor location, the degree of tumor resection, tumor recurrence or malignant transformation, the disease progression-free survival (PFS) rate and the overall survival (OS) rate were examined. Results: The mean age of the patients was 18.0±13.6 years. The mean PFS and OS rates were 53.3±49.2 months and 62.7±52.1 months. Twelve patients were less than 16 years of age and 8 patients were 16 years of age or older with the mean PFS rates 72.4±52.7 months and 24.6±25.5 months, respectively. Nine patients (45%) had tumor recurrence or progression and the mean PFS rate was 41.3±37.2 months. Among the recurrence group, the patients younger than 16 (5 cases) had a longer mean PFS (65.8±34.3 months) than the patients who was 16 or older (4 cases ; 11.8±12.2 months). Other factors did not show statistically significant differences in the PFS and OS rates. Conclusion: Generally, PA patients have a good prognosis. However, a bad prognosis can occur in adult patients, particularly with incomplete resection. Therefore, aggressive operations should be performed to prevent recurrence in older patients. Additionally, even though radical tumor resections are done, we should be aware of tumor recurrences, especially within the first 4 years after the operation.
허정우(Hur, Jung Woo),나민환(Na, Min Whan),탁재현(Tak, Jae Hyun),오세훈(Oh, Se Hoon) 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
The Stiffness of B.I.W is known as the important factor of a vehicle preformance. Using HAS Analysis, we can archive increasement of body stiffness. we apply same suspensions to the two bodies which has different body stiffness, then we can measure vehicle perfomance through various test. Finally we can determine the relationships between body stiffness & R&H performances.
Le Fort I 골절단술을 이용한 상악골 전진 후 안정성에 관한 3차원적 연구
오철중,허정우,정광,조민성,정승곤,박홍주,오희균,유선열,국민석,Oh, Chul-Jung,Hur, Jung-Woo,Chung, Kwang,Cho, Min-Sung,Jung, Seunggon,Park, Hong-Ju,Oh, Hee-Kyun,Ryu, Sun-Youl,Kook, Min-Suk 대한악안면성형재건외과학회 2013 Maxillofacial Plastic Reconstructive Surgery Vol.35 No.2
Purpose: This study evaluated postoperative maxillary stabilities in patients with skeletal Class III malocclusion who were taken both maxillary advancement surgery and mandibular retrusive surgery, using Le Fort I osteotomy, through three-dimensional computed tomography. Methods: We selected 14 patients who were taken postoperative three-dimensional computerized tomography at the time before surgery, immediately after surgery, six months after surgery among the patients undergone both maxillary advancement surgery using Le Fort I osteotomy and mandibular retrusive surgery using bilateral sagittal split ramus osteotomy. We measured and compared the vertical distance of A-point and posterior nasal spine (PNS), the horizontal distance of A-point and PNS in transverse plane and coronal plane of the three-dimensional reconstructed images, respectively. Results: In transverse plane, the distance difference between immediately after surgery ($S_1$) and immediately before surgery ($S_0$) of A-point was $-0.04{\pm}1.80$ mm, $S_2$ and $S_0$ was $-0.15{\pm}1.69$ mm, and between $S_1$ and $S_2$ was $0.11{\pm}0.58$ mm. There were no significant differences between these data (P>0.05). In transverse plane, the distance between $S_1-S_0$ of PNS was $-3.87{\pm}2.37$ mm, $S_2-S_0$ of PNS was $-3.79{\pm}2.39$ mm, and $S_1-S_2$ of PNS was $-0.08{\pm}0.18$ mm. There were significant differences between these data (P<0.05). In coronal plane, the distance between $S_1-S_0$ of A-point was $3.99{\pm}0.86$ mm, $S_2-S_0$ was $3.57{\pm}1.09$ mm, and $S_1-S_2$ was $0.42{\pm}0.42$ mm. There were significant differences between these data (P<0.05). In coronal plane, the distance between $S_1-S_0$ of PNS was $3.82{\pm}0.96$ mm, $S_2-S_0$ was $3.43{\pm}0.91$ mm, and $S_1S_2$ was $0.39{\pm}0.49$ mm. There were significant differences between these data (P<0.05). In transverse plane, it was estimated that PNS has no statistical postoperative stability in the same direction. In coronal plane, it was estimated that both A-point and PNS had no statistical postoperative stability (P<0.05). Conclusion: Clinically, the operation plan needs to take into account of the maxillary relapse.
자가 온레이 블럭골 이식 후 증대된 치조골과 임플란트의 평가
Uttom Kumar Shet,조민성(Min-Sung Cho),허정우(Jung-Woo Hur),오철중(Chul-Jung Oh),정광(Kwang Chung),박홍주(Hong-Ju Park),국민석(Min-Suk Kook),정승곤(Seung-Gon Jung),오희균(Hee-Kyun Oh) 대한치과의사협회 2012 대한치과의사협회지 Vol.50 No.6
Introduction: The purpose of this study is to evaluate the clinical results of vertical alveolar ridge augmentation using autogenous block bone graft, especially resorption rate, and outcomes of dental implants placed in the grafted site. Patients and Methods: Medical records and radiographs were reviewed. Twenty-seven patients who have been received the autogenous block bone graft which harvested from chin, ramus, and ilium, and the implant installation on 31 areas(22 maxillas and 9 mandibles) were included. Eight implants were installed simultaneously at the time of bone graft in 4 patients, and 65 implants were installed after 4.9 months(range 2~18 months) of autogenous block bone graft in 23 patients. The resorption amount and rate of augmented bone, and the success and survival rates implants were evaluated. Results: Mean height of the augmented block bone was 5.9??2.3 ㎜(range from 2.5 to 13.0 mm). Mean follow-up period after block bone graft was 30.4 months(range from 16 to 55 months). Mean resorption of the augmented block bone was 2.0??1.5 ㎜ (range from 0.5 to 7.24 ㎜). The success and survival rates of the implants were 78.1% and 98.6%, respectively. Conclusion: This study indicates that the autogenous block bone graft is a useful and stable method for alveolar ridge augmentation for dental implant. And more augmentation is needed to compensate the resorption of the grafted bone.