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. 2022 Oct-Dec;22(4):338-342.
doi: 10.4103/jips.jips_247_21.

Stability of implant-abutment connection in three different systems after fatigue test

Farshad Bajoghli  1 , Mohmoud Sabouhi  2 , Mohamad Pourali  3 , Amin Davoudi  4
Affiliations

Stability of implant-abutment connection in three different systems after fatigue test

Farshad Bajoghli et al. J Indian Prosthodont Soc. 2022 Oct-Dec.

Abstract

Aim: Abutment screw loosening of implant-supported prosthesis causes a mismatch between the abutment and the implant. This screw loosening is influenced by the implant-abutment connection type, however, with contradictory results reported in different studies. The present study evaluates the stability of abutment-implant connections in three different systems before and after the fatigue test.

Settings and design: Thirty implants (4.3 mm in diameter and 12 mm in length) were divided into three groups of 10: Implantium, Zimmer, and straight internal hexagonal connection (SIC) implants.

Materials and methods: Two torques of 35 Ncm with an interval of 10 min were applied, followed by measuring removal torque value (RTV). The samples were re-torqued and then underwent a simulation of 1-year chewing clinical performance of dental implant under axial force of 400 N, with a frequency of 8 Hz (one million cycles). After fatigue test, the RTV was calculated and recorded.

Statistical analysis: The mean RTVs obtained before and after cyclic load were analyzed by SPSS version 22 software using multivariate analysis.

Results: Significant differences in RTV and role of cyclic loading were found between SIC and Implantium groups (P = 0.006 and 0.021, respectively), as well as between Zimmer and SIC groups (P = 0.032 and 0.006, respectively), but not between Zimmer and Implantium groups (P = 0.771 and 0.248, respectively).

Conclusion: The type of connection could affect the screw loosening, the preload loss, and the implant component stability. SIC group revealed the highest RTVs before and after cyclic loading.

Keywords: Dental implant; fatigue; reverse torque; screw loosening.

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Conflict of interest statement

None

Figures

Figure 1
Figure 1
Mean removal torque values before and after cyclic loading in studied groups
See this image and copyright information in PMC

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