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

Gorka Santamaría-Arrieta, Aritza Brizuela-Velasco, Felipe J Fernández-González, David Chávarri-Prado, Yelko Chento-Valiente, Eneko Solaberrieta, Markel Diéguez-Pereira, José-Antonio Vega, Jaime Yurrebaso-Asúa, Gorka Santamaría-Arrieta, Aritza Brizuela-Velasco, Felipe J Fernández-González, David Chávarri-Prado, Yelko Chento-Valiente, Eneko Solaberrieta, Markel Diéguez-Pereira, José-Antonio Vega, Jaime Yurrebaso-Asúa

Abstract

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.

Key words: Implant stability quotient, overdrilling, primary stability, resonance frequency analysis, torque.

Conflict of interest statement

Conflict of interest statement:Nothing to declare.

Figures

Figure 1
Figure 1
Surgical procedure: locating implant positions with the cortical drill.
Figure 2
Figure 2
Implant primary stability measured by peak insertion torque with a manual torque wrench.
Figure 3
Figure 3
Implant primary stability measured with resonance frequency analysis (Osstell ISQ).
Figure 4
Figure 4
a) CBCT images of a Group A implant and b) An implant of group B. Od: Over-drill.

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Source: PubMed

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