Objective: This research was carried to evaluate which solitary attachment; OT Cap Ball attachment or OT Cap Equator Profile attachment mounted on a bar splinting two implants retaining mandibular overdenture is more favorable regarding crestal bone height and bone density changes surrounding the implants using cone beam computed tomography. Materials and Methods: Following two stage surgical protocol twelve completely edentulous patients received two implants placed bilaterally in the canine region (24 implants) to retain mandibular overdenture. Four months following the surgery patients were randomly divided into two equal groups; Group-I received two OT Cap Ball attachments mounted on a bar splinting the implants, while Group-II received two OT Cap Equator Profile attachments mounted on a bar splinting the implants upon which mandibular overdentures were retained in both groups. Once patients were comfortable to the prosthesis, they were placed on zero, six and twelve months follow-up periods using cone beam computed tomography. Measurements were taken on crestal bone height and bone density changes surrounding the implants then the results were statistically analyzed. Results: There was decrease in mean value of crestal bone height and increase in mean value of bone density surrounding the implants throughout the study period in both studied groups however, there was statistically none significant difference between the two studied groups whether in the decrease of crestal bone height or in the increase of bone density. Conclusion: There is no difference between using castable bar supporting either Ball attachment or Equator profile attachment retaining mandibular overdenture regarding the crestal bone height and bone density changes surrounding the implants.
Rizk, Fardos N., "Comparative Evaluation of Two Different Castable Bar Attachments in Implant Retained Mandibular Overdenture Cases" (2013). Dentistry. 91.