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.
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.
Authors: Roland Glauser; Lars Sennerby; Neil Meredith; Andreas Rée; AnnaKarin Lundgren; Jan Gottlow; Christoph H F Hämmerle Journal: Clin Oral Implants Res Date: 2004-08 Impact factor: 5.977
Authors: V Pattijn; S V N Jaecques; E De Smet; L Muraru; C Van Lierde; G Van der Perre; I Naert; J Vander Sloten Journal: Med Eng Phys Date: 2006-04-04 Impact factor: 2.242
Authors: Murat Akkocaoglu; Serdar Uysal; Ibrahim Tekdemir; Kivanc Akca; Murat Cavit Cehreli Journal: Clin Oral Implants Res Date: 2005-04 Impact factor: 5.977
Authors: G Falisi; M Severino; C Rastelli; S Bernardi; S Caruso; M Galli; L Lamazza; C Di Paolo Journal: Med Oral Patol Oral Cir Bucal Date: 2017-03-01