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이중 지대주에서 티타늄 링크 높이가 지르코니아 지대주와의 유지력에 주는 영향
신홍수(Hong-Soo Shin),허수복(Soo-Bok Her),석수황(Soo-Hwang Seok),이유미(Yu-Mi Lee),임범순(Bum-Soon Lim) 대한치과재료학회 2013 대한치과재료학회지 Vol.40 No.3
The aim of present study was to evaluate the effects of link height and dental cements on the retention force between titanium link and zirconia abutment in the Ti-Zr bicomponent abutment system. Three different height (2.0, 2.5, and 3.0 mm with 0o taper) of titanium links (MonoDent, Korea) were machined and pertinent zirconia abutments (Acucera, Korea) were fabricated with CAD/CAM. One hundred thirty five titanium links and zirconia abutments were prepared. Zirconia abutments were cemented on their respective titanium links with three different types of dental cements, such as zinc phosphate (Fleck’s), resin-modified glass ionomer (RMGI, RelyX Luting 2), self-adhesive resin cement (RelyX U200). Specimens were stored in deionized water (37℃) for 24 hours until testing. Pull-off test was performed using a universal testing machine (Instron 4466, USA) with a crosshead speed of 1 mm/min. Fifteen specimens were tested at each experimental group. The data were analyzed using t-test and Newman-Keuls multiple comparisons test (p=0.05). RMGI showed the lowest retention force (p<0.05) and ZPC showed similar retention force with resin cement (p>0.05) regardless of link heights. For ZPC groups and self-adhesive resin cement groups, 3.0 mm height showed significantly higher retention force than both 2.5 mm and 2.0 mm groups which were not significantly different (p>0.05) For RMGI groups, the retention force increased significantly with increasing of link height (p<0.05). To obtain the proper retention in clinical situation, height of titanium link should be no less than 3.0 mm.
컴퓨터단층촬영과 파노라마상을 이용한 한국인 하치조관의 하악에서의 협, 설측 위치 관계에 대한 연구
신홍수(Hong-Soo Shin),황순정(Soon-Jung Hwang) 대한구강악안면외과학회 2002 대한구강악안면외과학회지 Vol.28 No.1
When bilateral sagittal split ramus osteotomy or mandibular angle reduction are carried out, we have to consider the position of inferior alveolar nerve. For bone splitting or resection using a saw or an osteotome, the bucco-lingual position of the inferior alveolar nerve plays an important role in the preventing perioperative complications such as paresthesia or anesthesia. Because it is rare to find literatures concerning the mean anatomic position of the inferior alveolar nerve in Koreans, we investigated 30 patients who underwent to take CT and orthopantomogram for implant surgery, and evaluated the bucco-lingual position and vertical relationship of the inferior alveolar nerve at the mandible. The results showed that the distance between inferior alveolar nerve and buccal plate was the farthest at mandibular second molar (7.17.4mm) and the nearest at mandibular angle area (4.44.8mm). But it was no statistical relationship between the bucco-lingual postion of inferior alveolar nerve on the CT and its vertical position on the OPT. In conclusion, the results suggest that a careful surgical procedure is needed at the mandibular angle area to avoid a nerve damage and there are sufficient bone materials at the mandibular second molar are for bilateral sagittal split ramus osteotomy or mandibular angle reduction or plate fixation. And OPT is not usefull for the evaluation of a relative bucco-lingual position of inferior alveolar nerve in relation to its vertical postion on the OPT.
효과적인 비익기저부의 회복을 위한 치조열 환자의 골이식 치험례
신홍수(Hong-Soo Shin),유양근(Yang-Keun Yoo),최영준(Young-Joon Choi),황순정(Soon-Jung Hwang) 대한구강악안면외과학회 2002 대한구강악안면외과학회지 Vol.28 No.1
The cleft alveolus is one of three parts in cleft deformity. The purpose of cleft alveolus bone grafting is the recovery of normal esthetics, occlusion and speech. If a bony defect is extended to the nasal floor, especially wide bony defect at the ala base, it is difficult to condense the cancellous bone during bone transplantation and to reconstruct the normal anatomy at the alar base. We treated with above mentioned cleft alveolus patients using the autogenous cortical bone effectively. We report this technique with two cases and the literatures review.