Effect of Different Bar Attachment Modalities on the Supporting Structure of Implant Retained Mandibular Overdenture

Abstract

This study was carried out to evaluate and compare the effect of two different bar attachment modalities on the supporting structures of implant supported complete mandibular overdenture, using radiographic assessment (CBCT). Fourteen patients were selected from among those attending the out-patient clinic, Prosthodontic Department, Faculty of Dentistry, Ain Shams University to participate in this study. Patients were precisely selected and thoroughly examined in order to reduce human variables and eliminate any factor that might adversely affect the results of this study. Patients were rehabilitated by mucosa supported maxillary complete denture and two implant retained mandibular overdenture. Standard clinical and laboratory techniques were followed for denture construction for all patients. Patients participating in this study were randomly divided into two equal groups according to attachment used into; • Group I: Seven patients were rehabilitated by implant retained mandibular overdenture where the bar was retained by clip attachment. • Group II: Seven patients were rehabilitated by implant retained mandibular overdenture where the bar was retained by resilient soft liner (Retention.Sil). Surgical installation of the implant was performed under strict aseptic conditions obeying the standard protocol and delayed loading protocol was followed.