EFFECT OF PREFABRICATED BAR DESIGN WITH IMPLANT-STABILIZED PROSTHESESON RIDGE RESORPTION - A CLINICAL REPORT

This investigation was concerned with the resorption of the posterior mandibular residual ridge in patients wearing mandibular overdentures supported by either parallel-sided bars (rigid joint) or oval straight bars (resilient joint) on two activated implants. Rotational tomograp hs were taken shortly after implant placement and up to 8 years later. Using proportional measurement, the area of residual ridge was measur ed in bilateral posterior areas. Patients rehabilitated with implant-s tabilized mandibular overdentures demonstrated posterior mandibular re sidual ridge resorption at low rates, which were not significantly inf luenced by the design of the prefabricated bar.