Effect Of Using Two Different Attachment Systems On The Marginal Bone Height And Patient Satisfaction In Two Splinted Implants With Cantilever Bar Retaining Mandibular Overdenture (A Randomized Clinical Study)

Aim of the study: To evaluate the effect of using two different attachment systems on marginal bone height & patient satisfaction in two implant retained mandibular overdentures (IOD) with cantilever extension.Materials & Methods:Fourteen completely edentulous patients were selected from the out-patient clinic, Faculty of Dentistry, Beni-Suef University. Patients were rehabilitated with maxillary complete denture & mandibular implant overdenture with two different attachment systems. Group (I): Received two IOD with cantilevered bar-clip attachment. Group (II): Received two IOD with cantilevered bar with ball attachment. Patients were recalled at 3, 6, 9 & 12 months to evaluate marginal bone loss as well as patient’s satisfaction. Results: The mean marginal bone height loss after 3 month for Group- I (Bar & clip attachment) was 0.3889mm ± 0.3915 while for Group II (Bar -ball & socket attachment) was 0.3954mm ± 0.06046. After 6 month, the mean bone loss for Group (I) was 0.6786mm ± 0.06098, while for Group (II) was 0.7056mm ± 0.4157. After 9 month, the mean bone loss for Group (I) was 0.7897mm ± 0.01378 while for Group (II) was 0.7984mm ± 0.02584. After 12 month, the mean bone loss for Group (I) was 0.8556mm ± 0.33802 while for Group (II) was 1.0154mm ± 0.08415.Regarding patient satisfaction: there was a significant difference during the follow-up intervals in both groups.Conclusions: • Bar/clip attachment may provide better stress distribution &less marginal bone loss than bar/ball attachment.• Patients may be more satisfied with bar/ball attachment than bar/clip attachment.