Failure of prosthetic screws on 971 implants

Brazilian Journal of Oral Sciences

Carolina Schäffer Morsch¹  Caroline Freitas Rafael¹  Juan Felipe Montero Dumes¹  Gabriella Mercedez Peñarrieta Juanito¹  João Gustavo Oliveira De Souza¹  Marco Aurélio Bianchini¹ 

关键词: dental implant-abutment design;    /complications;    prosthesis failure;    dental prosthesis;    implant-supported;   

DOI  :  10.1590/1677-3225v14n3a04

来源: SciELO

【 摘 要 】

AbstractAim:To evaluate the presence of failures in prosthetic screws and whether these failures are related to the type of prosthesis, abutment angulation and presence or not of intermediate.Methods: Two-hundred and sixty-seven patients were evaluated at the Federal University of Santa Catarina, totaling 971 external hexagonal implants in place for at least one year. A Tobit regression model for censored variables was used and the explanatory variables were subjected to percentage analysis.Results: The results demonstrated a relationship between the failure in prosthetic screws and the investigated factors with a significance of F=0.003 and p<0.05. The percentage analysis showed that the prosthetic screw failed in 8.82% of 238 unitary prostheses and 10.1% of 773 multiple prostheses. Among 912 abutments, 9.43% failed and in the 59 angled abutments, failures appeared in 15.25%. A total of 200 prostheses were placed over the implant platform and 13% failed. A total of 771 prostheses were made over abutment and 8.95% of these screws failed.Conclusions: Through multiple linear regression it could be concluded that the type of prosthesis showed no significant influence on the prosthetic screw failure, but other variables were related to this mechanical failure. There was a significant relationship among the variables, demonstrating the need for greater attention in choosing the type of prosthesis, the abutment angulation and whether the prosthesis will be placed directly on the implant platform or on the abutment.

【 授权许可】

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