Screw loosening of original and non-original abutments in implant dentistry: an in vitro study

Aim Screw loosening is one of the most common clinical complications of dental implants. This study aimed to evaluate the possibility of combining original and non original components. Materials and methods In this in vitro study, 30 implants were divided into 3 groups. For the first group, original abutments of the same implant system were used, whereas for the second and third group, abutments of a South Korean implant system and a French implant system respectivelywere connected to the implants. Abutment screws were tightened to 35 Ncm. Reverse Torque Value (RTV) was measured using a digital torque meter (pre-loading RTV). The samples were subjected to cyclic loading up to 75 N for 500,000 cycles. The RTV was measured again (post-loading RTV). Statistical analysis was performed using SPSS version 24. ANOVA test was used to analyze the data. A 5% significance level was set. Results The difference of pre-loading RTVs among the 3 study groups was not significant. Post-loading RTVs were not significantly different between the 3 groups. Conclusion The results suggest that the non original components have acceptable compatibility with the original abutment.