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http://dx.doi.org/10.5051/jpis.2010.40.5.239

The effect of implant shape and bone preparation on primary stability  

Moon, Sang-Hyun (Department of Periodontology and Research Institute for Oral Sciences, Gangneung-Wonju National University College of Dentistry)
Um, Heung-Sik (Department of Periodontology and Research Institute for Oral Sciences, Gangneung-Wonju National University College of Dentistry)
Lee, Jae-Kwan (Department of Periodontology and Research Institute for Oral Sciences, Gangneung-Wonju National University College of Dentistry)
Chang, Beom-Seok (Department of Periodontology and Research Institute for Oral Sciences, Gangneung-Wonju National University College of Dentistry)
Lee, Min-Ku (Department of Periodontics, Kangbuk Samsung Hospital)
Publication Information
Journal of Periodontal and Implant Science / v.40, no.5, 2010 , pp. 239-243 More about this Journal
Abstract
Purpose: The purpose of this study was to evaluate the effects of implant shape and bone preparation on the primary stability of the implants using resonance frequency analysis. Methods: Sixty bovine rib blocks were used for soft and hard bone models. Each rib block received two types of dental implant fixtures; a straight-screw type and tapered-screw type. Final drilling was done at three different depths for each implant type; 1 mm under-preparation, standard preparation, and 1 mm over-preparation. Immediately after fixture insertion, the implant stability quotient (ISQ) was measured for each implant. Results: Regardless of the bone type, the ISQ values of the straight-screw type and tapered-screw type implants were not significantly different (P>0.05). Depth of bone preparation had no significant effect on the ISQ value of straight-screw type implants (P>0.05). For the tapered-screw type implants, under-preparation significantly increased the ISQ value (P<0.05), whereas overpreparation significantly decreased the ISQ value (P<0.05). Conclusions: Within the limitations of this study, it is concluded that bone density seemed to have a prevailing effect over implant shape on primary stability. The primary stability of the tapered-screw type implants might be enhanced by delicate surgical techniques.
Keywords
Bone density; Dental implants;
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