Effectiveness of Sealing Gel on Vertical Misfit at the Implant-Abutment Interface and Preload Maintenance of Screw- Retained Implant-Supported Prostheses

Author(s)

Seloto, Camila Berbel ^[1] ; Strazzi-Sahyon, Henrico Badaoui ^[1] ; dos Santos, Paulo Henrique ^[1] ; Assuncao, Wirley Goncalves ^[1]

Affiliation

^[1] Sao Paulo State Univ UNESP, Aracatuba Sch Dent, Dept Dent Mat & Prosthodont, Jose Bonifacio 1193, BR-16015050 Aracatuba, SP - Brazil

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF ORAL & MAXILLOFACIAL IMPLANTS; v. 35, n. 3, p. 479-484, MAY-JUN 2020.
• Web of Science Citations: 0

Abstract

Purpose: This in vitro study evaluated the effectiveness of a sealing agent on vertical misfit of the implant-abutment interface in an external hexagon implant system before and after mechanical cyclic loading. Effects on preload maintenance of retaining screws after mechanical cycling were also assessed. Materials and Methods: External hexagon implant systems were divided into two groups (n = 12) according to the presence of an anaerobic sealing gel (control group-no sealing gel; experimental group-sealing gel applied). A prefabricated UCLA abutment was attached to the external hexagon implant with a digital torque wrench in accordance with the recommendations of the manufacturer. Specimens were tested through mechanical cyclic loading (1 x 10(6) cycles, 2 Hz, and 130 N). Vertical misfit of the implant-abutment interface was analyzed using a stereomicroscope, and reverse torque values were obtained using a digital wrench. Misfit and reverse torque data were measured and analyzed via analysis of variance (ANOVA) and the Tukey least significant difference test (alpha = .05). Results: The sealing gel promoted lower vertical misfit values in the test group after mechanical cycling compared with before cycling (P = .009). The control group showed lower reverse torque values for retaining screws compared with the initial torque after mechanical cyclic loading (P < .0001). However, sealing gel application promoted higher reverse torque values in the test group postcycling (P = .0003). Conclusion: Anaerobic sealing agent application improved vertical misfit of the implant-abutment interface and preload maintenance of screw-retained implant-supported prostheses post-mechanical cycling. (AU)

• FAPESP's process: 15/11617-4 - Evaluation of the efficacy of a gel sealant in sealing abutment of inferface / implant and maintaining the preload of retaining screws
• Grantee: Camila Berbel Seloto
• Support Opportunities: Scholarships in Brazil - Master