Association between restorative emergence profiles and peri-implant bone loss in different implant systems: A retrospective study with up to 7 years of follow up.

Description :

This retrospective study consists of evaluating the association between different restorative emergence profiles (Emergence profile angles >30 degree or Emergence profile angles <30 degrees) and the peri-implant bone loss in bone level implants, platform switching implants and tissue level implants. In other words, implants will be divided into the 3 mentioned types and bone loss will be assessed according to the emergence profile in each system of implants. Standardized periapical radiograph that were captured after crown placement on implants will be compared with the new radiographs done after recalling the patient. Radiographs used for analysis will be taken when the patients come in for the study examination. Digital radiographs will be made of the implants at the time of the follow-up examination using film holders to ensure paralleling technique and diminish distortion of the image. The image processing program (DBSWIN software) will be used to assess the emergence angle and profile of restorations.