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논문 기본 정보

자료유형
학술저널
저자정보
Jae-ho Ryu (Pusan National University) Jung-Bo Huh (Pusan National University) Jung-Hoon Ro (Pusan National University) Mi-Jung Yun (Pusan National University) Chang-Mo Jeong (Pusan National University)
저널정보
대한치과의사협회 대한치과의사협회지 대한치과의사협회지 Vol.53 No.11
발행연도
2015.11
수록면
804 - 816 (13page)

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PURPOSE: The aim of this study was to evaluate the influence of the oxide layer removal process in the Co-Cr-Mo (CCM) abutment after casting procedure on the prosthesis settlement and screw stability. MATERIALS AND METHODS: CCM abutments of four different interface conditions (CCM-M; machined, CCM-O; oxide layer formed, CCM-B; blasted, CCM-P; polished after blasted) and gold abutment (Gold-C; Cast with type III Gold alloy) were used. The initial settling values of abutments were evaluated according to the difference of implant-abutment length when the tightening torques were applied at 5 Ncm and 30 Ncm, and the settling values of abutments caused by loading were evaluated according to the difference of implantabutment length before and after loading with 250 N, 100000 cycle. The loss ratios of removal torque for abutment screws were evaluated according to the difference in value of removal torques under 30 Ncm tightening torque applied before and after cyclic loading. RESULTS: The CCM-P and CCM-B group showed a higher initial settling value compared with the Gold-C group (P<.05), while the Gold-C group showed the highest settling values caused by loading (P<.05) and no significant differences were observed for between CCM groups (P>.05). The loss ratio of removal torque values for the CCM-B, CCM-P groups did not differ significantly from that of the Gold-C group (P>.05). CONCLUSION: Even though the oxide layer was removed by different methods, CCM abutment with internal conical connection structure showed lower abutment settling and similar screw loosening after cyclic loading compared with gold abutment.

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ABSTRACT
Ⅰ. INTRODUCTION
Ⅱ. MATERIALS AND METHODS
Ⅲ. RESULTS
Ⅳ. DISCUSSION
Ⅴ. CONCLUSION
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UCI(KEPA) : I410-ECN-0101-2016-515-002001622