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

Autor(es)

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

Afiliação do(s) autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ORAL & MAXILLOFACIAL IMPLANTS; v. 35, n. 3, p. 479-484, MAY-JUN 2020.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 15/11617-4 - Avaliação da eficácia de um gel de vedação no selamento da inferface pilar/implante e na manutenção da pré-carga dos parafusos de retenção
• Beneficiário: Camila Berbel Seloto
• Modalidade de apoio: Bolsas no Brasil - Mestrado