Radiological Evaluation of Different Augmentation Techniques Used for Implant Supported Rehabilitation- 2 Years Follow Up

Objectives: The purpose of the present cohort study was to evaluate two different methods of lateral mandibular augmentation techniques of narrow crests and clinical performance of implant-supported rehabilitations in posterior augmented mandibles.

Methods: Thirty two partially edentulous patients who developed lateral atrophy of the posterior mandible but with adequate bone hight (residual bone width 3 to 5 mm) were treated for lateral bone augmentation using ridge expansion techniques and screw guided bone regeneration techniques. Simultaneous implant insertion was performed at the same surgical time of bone augmentation. After 6 to 7 months of healing, implants were restored by fixed prostheses. Initially, bone thickness was determined by cone beam computed tomography and the augmentative technique was chosen depending mainly by the residual bone width. Immediately post-operative and two years post-loading bone thickness was assessed by a new cone beam computed tomography.

Results: There were no cases of infection and no complications. All treated defect sites exhibited excellent bone formation and stability of the bone width after 2 years of loading. The mean lateral augmentation was 4,8±0,6 mm. The mean peri-implant marginal bone loss around implants was 09.05 ± 0.32 mm two years after loading.

Conclusions: The results of the present 2-year study suggested high success rates for implants placed in the augmented sites. The stability of the achieved bone has proved that both techniques are reliable for an implant supported fixed mandibular prosthesis.