Journal of AdvancedMedical and Dental Sciences Research

Aim: To assess the abutment screw loosening in dental implants survival with especially screw coating in literature. Methodology: A database search yielded a total of 14 articles out of which 8 were excluded based on the title and abstracts not relevant to the topic of our interest and 6 were included based on the core data. The six articles were reviewed, and four articles were consolidated to perform the meta-analysis. Three- year survival rates were also taken into consideration for screw loosening in case of implants. Results: All the four studies showed a similar expression of outcome measure; the detorque values were expressed in Ncm. The χ2 = 144.71, df = 3, p < 0.00001, and I2 = 98%. Hence, a Random Effect model with 95% confidence interval was chosen for meta-analysis. The overall effect observed in the meta-analysis was Z = 0.36, p = 0.72, and no statistically significant differences were observed between the coated and noncoated screws with respect to detorque values. Complication free survival rate of implants was 97.3%. Conclusion: This meta-analysis inferred that there is no difference between the coated and noncoated screws with respect to screw loosening and loosened screw which was rare event in our studies did not affect the survivability of implant in general provided proper anti-rotational features are employed.