Abstract
Comparison of the Effect of Two Different Abutment Diameters on Detorque Value Using Cyclic Loading and Thermocycling
Highlights
Background and AimScrew loosening is a common problem with both screw-retained and cemented implant restorations
When the load is applied at an angle of 30 degrees, it is subdivided into horizontal and vertical components such that the load is applied along both horizontal and vertical axes, similar www.jrdms.dental.ac.ir to the load during mastication.(15) the abutments (3.9 and 5.2 mm) were installed into the implants with a 25Ncm torque as recommended by the manufacturer
Parametric ttests can be used to compare the mean of these two DentinDysplasia Type 1 (DD1)
Summary
Background and AimScrew loosening is a common problem with both screw-retained and cemented implant restorations. It is assumed that the abutment diameter affects detorque value and screw loosening. We aimed to determine the effect of two different abutment diameters on detorque value using cyclic loading and thermocycling. Eight screws from each group (3.9- and 5.2-mm abutments) were maintained for a month in a stable state while the rest of the screws underwent cyclic loading for 10,000 cycles with the frequency of 1 Hz and force of 75 N/cm. Detorque value was determined using the torque meter used for screw tightening. Result: Detorque values were 18.25±1.91 and 21.13±1.46 Ncm with 3.9- and 5.2-mm abutments, respectively. Detorque loss value was 15.50±5.83% with 5.2-mm abutment and 27±7.63% with 3.9-mm abutment. Conclusion: The results suggested that torque loss was lower with 5.2-mm abutment diameter.
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