Biomechanical evaluation of oversized drilling technique on primary implant stability measured by insertion torque and resonance frequency analysis

• Autores: Gorka Santamaría Arrieta, Aritza Brizuela Velasco, F.J. Fernández González, David Chávarri Prado, Yelko Chento Valiente, Eneko Solaberrieta, Markel Diéguez Pereira, José Antonio Vega Álvarez, Jaime Yurrebaso-Asua
• Localización: Journal of Clinical and Experimental Dentistry, ISSN-e 1989-5488, Vol. 8, Nº. 3 (Julio), 2016, págs. 307-311
• Idioma: inglés
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• Resumen

  • Background: This study evaluated the influence of implant site preparation depth on primary stability measured by insertion torque and resonance frequency analysis (RFA).

    Material and Methods: Thirty-two implant sites were prepared in eight veal rib blocks. Sixteen sites were prepared using the conventional drilling sequence recommended by the manufacturer to a working depth of 10mm.

    The remaining 16 sites were prepared using an oversize drilling technique (overpreparation) to a working depth of 12mm. Bone density was determined using cone beam computerized tomography (CBCT). The implants were placed and primary stability was measured by two methods: insertion torque (Ncm), and RFA (implant stability quotient [ISQ]).

    Results: The highest torque values were achieved by the conventional drilling technique (10mm). The ANOVA test confirmed that there was a significant correlation between torque and drilling depth (p<0.05). However, no statistically significant differences were obtained between ISQ values at 10 or 12 mm drilling depths (p>0.05) at either measurement direction (cortical and medullar). No statistical relation between torque and ISQ values was identified, or between bone density and primary stability (p>0.05).

    Conclusions: Vertical overpreparation of the implant bed will obtain lower insertion torque values, but does not produce statistically significant differences in ISQ values.