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논문 기본 정보

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학술저널
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대한치과보철학회 The Journal of Advanced of Prosthodontics The Journal of Advanced of Prosthodontics 제1권 제1호
발행연도
2009.1
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19 - 25 (7page)

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STATEMENT OF PROBLEM. Primary stability at the time of implant placement is related to the level of primary bone contact. The level of bone contact with implant is affected by thread design, surgical procedure and bone quality, etc. PURPOSE. The aim of this study was to compare the initial stability of the various taper implants according to the thread designs, half of which were engaged to inferior cortical wall of type IV bone (Group 1) and the rest of which were not engaged to inferior cortical wall (Group 2) by measuring the implant stability quotient (ISQ) and the removal torque value (RTV). MATERIAL AND METHODS. In this study, 6 different implant fixtures with 10 mm length were installed. In order to simulate the sinus inferior wall of type IV bone, one side cortical bone of swine rib was removed. 6 different implants were installed in the same bone block following manufacturer’s recommended procedures. Total 10 bone blocks were made for each group. The height of Group 1 bone block was 10 mm for engagement and that of group 2 was 13 mm. The initial stability was measured with ISQ value using Osstell mentor® and with removal torque using MGT50 torque gauge. RESULTS. In this study, we found the following results. 1. In Group 1 with fixtures engaged to the inferior cortical wall, there was no significant difference in RTV and ISQ value among the 6 types of implants. 2. In Group 2 with fixtures not engaged to the inferior cortical wall, there was significant difference in RTV and ISQ value among the 6 types of implants (P < .05). 3. There was significant difference in RTV and ISQ value according to whether fixtures were engaged to the inferior cortical wall or not (P < .05). 4. Under-drilling made RTV and ISQ value increase significantly in the NT implants which had lower RTV and ISQ value in Group 2 (P < .05). CONCLUSIONS. Without being engaged to the inferior cortical wall fixtures had initial stability affected by implant types. Also in poor quality bone, under-drilling improved initial stability.
#Thread design #Taper implant #Bicortical engagement #ISQ #Removal torque value

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참고문헌 (21)

참고문헌 신청
Akkocaoglu M / 2007 / Primary stability of simultaneously placed dental implants in extraoral donor graft sites: a human cadaver study / J Oral Maxillofac Surg 65 : 400 ~ 40 google schola Alsaadi G / 2007 / A biomechanical assessment of the relation between the oral implant stability at insertion and subjective bone quality assessment / J Clin Periodontol 34 : google schola Balleri P / 2002 / Stability measurements of osseointegrated implants using Osstell in partially edentulous jaws after 1 year of loading: a pilot study / Clin Implant Dent R google schola Block CM / 1997 / Histologic evaluation of the LaminOss osteocompressive dental screw: a pilot study / Compend Contin Educ Dent 18 : 676 ~ 680 google schola Fernandes Ede L / 2007 / Primary stability of turned and acid-etched screwtype implants: a removal torque and histomorphometric study in rabbits / Int J Oral Maxillofac Impl google schola

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