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상완골 간부 악성 병적골절의 비관혈적 고합성 골수강내 금속정 고정술
박원종,이승구,강용구,Bahk, Won-Jong,Rhee, Seung-Koo,Kang, Yong-Koo 대한근골격종양학회 2003 대한골관절종양학회지 Vol.9 No.1
Purpose: To analysis of the result of the treatment of metastatic diaphyseal fracture of the humerus with closed interlocking intrameduallry nailing. Materials and Methods: Among surgically treated 29 patients with pathologic or impending fracture of diaphysis of the humeurs, 13 patients (16 cases) treated with closed intramedullary interlocking nail were selected for the study. The final result of pain relief and functional recovery was evaluated by modified rating system of Perez et al. Results: Primary cancer was diagnosed after fracture was developed in 2 patients and pathologic or impending fracture was occurred average period of 28.9 months after primary cancer was diagnosed. The main primary malignancies were multiple myeloma, lung cancer and breast cancer. Mean survival after humeral metastasis was 11.7 months. The final result was superior to fair in 13 of 16 cases, and poor in 3 cases with progression of tumor spread or distant dissemination to the ipsilateral fingers. Except the latter 3 patients and other 3 patients, who died before 3 months postoperatively, bony union was achieved in 10 cases. There were no complications related to surgery. Conclusion: Closed interlocking intrameduallry nailing is accomplished with brief operative time, small amount of bleeding and provides immediate stability with resultant early return of function to the arm. Additionally it allows early postoperative irradiation. However, some of our cases shows that intramedullary nailing can accelerate tumor spread and metastases elsewhere, so that serious consideration must be given in planning this treatment. In conclusion, the functional status before fracture, life expectancy, type of tumor and extent of involvement should be carefully considered to decide operative treatment of metastatic disease.
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박원종,이승구,강용구,권오수,정양국,Bank, Won-Jong,Rhee, Seung-Koo,Kang, Yong-Koo,Kwon, Oh-Soo,Chung, Yang-Guk 대한근골격종양학회 2003 대한골관절종양학회지 Vol.9 No.1
Purpose: To analyze the clinical outcome and radiological features after surgical treatment of stage III giant cell tumor around the knee. Materials and Methods: 21 patients with stage III giant cell tumor around the knee joint, who were operated at our institutes between March 1991 and February 2000, were selected for this study. The average follow-up was 5.7 years (range, 1~9 years). After thorough curettage using high speed burr, cryosurgery and cementing with polymethymethacrylate (PMMA) were performed in 11 patients. 7 patients were treated with PMMA cementing (4 patients) or bone grafting (3 patients) after curettage without cryosurgery. Reconstruction with prosthesis composite allograft and knee fusion with Huckstep nail were performed in 3 patients with huge defect and joint perforation. Results: Local recurrence developed in 1 out of 11 patients who was treated with curettage and cementing with cryosurgery (9.1%) and 3 out of 7 patients who underwent curettage and cementing without cryosurgery (28.6%). Joint space narrowing more than 3mm was noted in 1 patient (9.1%), who treated with cryosurgery and anther patient (14.5%) who treated without cryosurgery. There was no local recurrence in case of wide resection and reconstruction. Conclusion: Thorough curettage and PMMA cementing with cryosurgery as an adjuvant is thought to be effective modalities in the treatment of stage 3 giant cell tumors around the knee. Wide resection and reconstruction can be reserved mainly for the cases of stage 3 giant cell tumor with significant cortical destruction and marked joint destruction, and the cases of local recurrence with poor bone stock.
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박원종 한국원자력산업회의 1995 원자력산업 Vol.15 No.5
방사능방재 기상자료수집시스템(REMDAS)은 방사선비상시 방사능방재대책기관이 방사성물질의 대기중 확산정도를 실시간으로 평가하여, 주민을 보호하기 위한 방지대책을 수립하는데 필요로 하는 기상정보를 제공해 주는 유익한 대응수단이다. 이 시스템이 운영됨에 따라 원자력시설의 안전성을 확보하기 위한 방사능방재대책이 전산화되는 일대 전기를 맞이하였다.
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표면처리가 치과용 콤포짓트 레진의 표면자유에너지에 미치는 영향
박원종(Won-Jong Park),최재윤(Jae-Yoon Choi),안진수(Jin-Soo Ahn),이상훈(Sang-Hoon Rhee),양형철(Hyeong-Cheol Yang),임범순(Bum-Soon Lim) 대한치과재료학회 2010 대한치과재료학회지 Vol.37 No.3
The purpose of this study was to evaluate the surface free energy of composite resin with different surface treatments. Six commercially available composite resin (Z250, P60, Metafil CX, Heliomolar, Grandio, and Supreme XT) were tested. The surface free energy of composite resin after various surface treatments was measured, and correlation between the types (microhybrid, microfilled, and nanohybrid) of composite resin and the surface free energy was evaluated. The surface of specimen was polished with SiC paper in order of #2000, #1000, and #600, respectively, and sandblasted with alumina (50 ㎛). Using 3 different liquids (deionized water, formamide and 1-bormo-naphathlene), the contact angles of resin were measured with Image analyzer, including the non-treated surface (control). The surface free energy of each specimen was calculated using Li fshitz-van der waals/aci d-base (LW/AB) method. Results were statistically analyzed using Turkey multiple comparison test (p=0.05). The surface free energy of composite resin was increased significantly compared to the energy before the surface treatment (p<0.05). The surface free energy of nanofilled composite resin showed significantly lower value compared to resin with other types of fillers, in non-treated surfaces. When the surface was treated, the surface free energy of nanofilled composite resin showed higher tendency than other resins with different types of fillers.
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