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Three interfaces of the dental implant system and their clinical effects on hard and soft tissues

Journal

MATERIALS HORIZONS
Volume 9, Issue 5, Pages 1387-1411

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1mh01621k

Keywords

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Funding

  1. National Research Foundation of Korea (NRF) - Korea government (MSIT) [2021R1A2C200465011]

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The successful integration of hard tissue with dental implants and the formation of a strong gingival barrier to prevent bacterial infiltration are crucial for clinical implant success. The surface characteristics and materials of the abutment influence the response of epithelial and connective tissue cells, while the biomechanics of the implant-abutment connection play a critical role in soft tissue seal and hard tissue integration.
Anatomically, the human tooth has structures both embedded within and forming part of the exterior surface of the human body. When a tooth is lost, it is often replaced by a dental implant, to facilitate the chewing of food and for esthetic purposes. For successful substitution of the lost tooth, hard tissue should be integrated into the implant surface. The microtopography and chemistry of the implant surface have been explored with the aim of enhancing osseointegration. Additionally, clinical implant success is dependent on ensuring that a barrier, comprising strong gingival attachment to an abutment, does not allow the infiltration of oral bacteria into the bone-integrated surface. Epithelial and connective tissue cells respond to the abutment surface, depending on its surface characteristics and the materials from which it is made. In particular, the biomechanics of the implant-abutment connection structure (i.e., the biomechanics of the interface between implant and abutment surfaces, and the screw mechanics of the implant-abutment assembly) are critical for both the soft tissue seal and hard tissue integration. Herein, we discuss the clinical importance of these three interfaces: bone-implant, gingiva-abutment, and implant-abutment.

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