Journal of Periodontal and Implant Science

Korean Academy of Periodontology (대한치주과학회)
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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)
  • Received : 2010.07.07
  • Accepted : 2010.09.20
  • Published : 2010.11.03
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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

References

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