http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 백명환 (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Computer-aided axiograph를 이용한 하악의 전방운동거리 분석
백명환,정호균,강홍구 중앙대학교 의과대학 의과학연구소 1997 中央醫大誌 Vol.22 No.2
Using axiography, dentists can observe and analyse the mandibular movements three dimensionally. The axiography can also reveal the subclinical arthrophthy in temporomandibular joint. The recent introduction of computer-aided axiography (CADIAX) gives a additional advantage that can display the enlarged diagram of condylar movement tracing so as to diagnose the initial changes of disc displacement more readily. The purpose of this study was to determine the protrusive length of condylar movement in sagittal plane. With the aid of diagnostic computer software, the length of the pathways was measured in 67 patients and the characteristics of curves were analyzed. The observed interquartile ranges of the length of protrusive condylar movement were 7.37-11.33 mm in the right joint and 7.20-10.42 mm in the left joint. The mean values of the protrusive length were 9.57 mm for the right joint and 9.28 mm for the left joint.
-
혈소판 농축 혈장이 임플란트 주변 골형성에 미치는 효과에 대한 연구
백명환,한석환,권종진 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.1
Various methods have been used to fill in the defects around the implants. Recently, researchs of developing and purifying various growth factors, and efforts to apply these growth factors in clinical situations have been carried out. Among those tries, platelet-rich plasma(PRP) containing abundant PDGF and TGF-β obtained by the sequestration and concentration of platelets by the gradient density centrifugation became one of the popular and preferred methods becuase of relatively simple procedure and abundant growth factor components. Bone morphogenic protein(BMP), platelet-derived growth factor(PDGF), and transforming growth factor-beta(TGF-β) are growth factors in the PRP that promote the bone formation. To elucidate the effects of PRP on the bone formation in peri-implant bone defects, twenty-seven Steri-Oss implants were inserted in the mandibular premolar areas of 8 adult dogs and artificial bone defects(3×4×4㎜) were prepared at the buccal side of the implants in 1st premolar, at the distal side of the implants in 3rd premolar. The control groups were filled with bovine bone grafts without PRP, and the experimental groups were filled with bovine bone grafts with PRP. Animals were sacrificed at 1, 2, 4, 8, and 12 weeks after the operation and speimens were observed by light and electron microscope. The results were as follows. first, the bone formation was observed at 1st week in the experimental groups, but at 2nd week in the control groups. second, the mature bone was observed at 4th week in the experimental groups. but 8th week in the control groups. the bone growth rate of experimental groups was more rapid than that of control groups. third, at 12th week, bone density ratio was higher in the experimental groups(71.65%) than that of the control groups(48.49%). fourth, Grafted bovine bone were almost completely absorbed at 1st week in experimental groups, but it was still present at 8th week in control groups. From the above results, PRP may accelerate the formation of new bone by promoting absorption of the graft material and increasing the growth rate of bone.
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
