This study evaluated the effect of the platform-switching phenomenon, the use of a smaller diameter abutment on a larger diameter implant platform. Clinical and histological outcomes of the periimplant mucosa around titanium abutments in a nonsubmerged implant were evaluated.
Ten healthy adult patients, ranging from 27 to 65 years, participated in the study. A minimum of 2 endosseous implants with immediate abutment connection was placed per patient, 1 conventional and 1 platform-switched abutment. All sites for implant placement had an adequate zone of keratinized mucosa before surgical intervention.
No clinical signs of inflammation were observed in the periimplant soft tissue mucosa, and healing was uneventful throughout the study period. Histological findings showed abnormally thick stratified squamous epithelium for both groups with few inflammatory cells in the connective tissue and none on the surface of the epithelium.
Histological findings for both conventional and platform-switched implant-abutment configurations showed a similar composition of the soft tissue. These findings were in direct agreement with previous studies.
*Professor, Department of Periodontology, Pontificia Universidad Católica Madre y Maestra, Santo Domingo, Dominican Republic.
†Clinical Assistant Professor, Department of Prosthodontics, New York University College of Dentistry, New York, NY.
‡Resident, Department of Periodontology, Pontificia Universidad Católica Madre y Maestra, Santo Domingo, Santo Domingo, Dominican Republic.
§Associate Professor, Department of Biomaterials and Biomimetics; Director for Research, Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, NY.
‖Adjunct Assistant Professor, Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, NY.
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