INFLUÊNCIA DO DIÂMETRO E DO COMPRIMENTO DO MINI- IMPLANTE NO TORQUE DE INSERÇÃO

Abstract

To evaluate the influence of the diameter and length of the mini implants insertion torque. Methods: 150 mini implants with lengths of 6.0, 8.0, 9.0 and 10.0 mm and diameters of 1.3, 1.5 and 1.8 mm from three different commercial brands were used. The mini implants were inserted into blocks of artificial bone and the insertion torque was measured using a universal testing machine (EMIC). The results were compared by Analysis of Variance with a criterion (ANOVA), Tukey Test and independent t test. Results: The length and diameter of the mini implants significantly influenced the insertion torque. There was trom average a strong positive correlation and statistically significant association between the diameter of the mini implant and the maximum twisting force. On the other hand, no correlation was found between the mini implant length and the maximum torsional strength. A multiple linear regression analysis revealed that the diameter and length of the mini implants explained 59.19% of the variation of the magnitude of maximum torsional strength. Conclusion: The null hypothesis (H ₒ) was rejected because the diameter and length of the mini implants significantly influenced the insertion torque.