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KMID : 0363020100400050239
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Journal of Korean Academy of Periodontology
2010 Volume.40 No. 5 p.239 ~ p.243
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The effect of implant shape and bone preparation on primary stability
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Moon Sang-Hyun
Um Heung-Sik
Lee Jae-Kwan
Chang Beom-Seok
Lee Min-Ku
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Abstract
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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.
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KEYWORD
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Bone density, Dental implants
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