Investigation of Effects of Multiple Implantations on Healing Abutments: Characterization, Microbial Analysis and Soft Tissue Compatibility



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The dental implant healing abutment (IHA) is a temporary component placed either immediately after the implant body or after the first healing phase. Very few studies have investigated dental implant components involved in the early stage of healing, especially the IHA, despite its vital role in soft tissue contouring and shaping after implant placement. The gingival mucosa around the implant neck restrains the invasion of microorganisms and infiltration of corrosive substances like biological fluids and food particles into the implant body by formation of a tight seal against the implant-IHA interface. Following IHA placement, host epithelial and gingival cells compete with oral bacteria to colonize the IHA surface. Successful implantation can be predicted based on the outcome of this race for the surface between oral bacteria and host tissue cells. The IHA, designed and labeled for “single” use, is typically re-used in multiple patients as a commercial dental practice. However, the effects of multiple implantations on the surface topography, mammalian cell attachment and bacterial colonization on the IHA surface in vivo is unknown. The goal of this study was to understand the oral microbiota colonizing the IHA as well as to characterize the surface topography and corrosion behavior of re-used IHA. In addition, the soft tissue response and bacterial adhesion were individually assessed on the used and control surfaces of the IHA.



Dental implants, Dental implants industry, Disposable medical devices--Reuse