Aim: The purpose of the study was to evaluate peri-implant and posterior bone loss in rigid and non- rigid telescopic two-implant supported mandibular overdenture.
Materials and Methods: 12 completely edentulous patients received two mandibular interforaminal implants to retain telescopic overdenture with metal band inserted beneath the first molar tooth bilaterally, opposed by maxillary complete denture. Group I (6 patients) had rigid telescopic connection and group II (6 patients) received non-rigid telescopic attachments. Radiographic evaluation was made after one year of using the overdenture to assess peri-implant and posterior bone loss using standardized periapical long cone parallel technique.
Results: there was no statistical significant difference regarding peri-implant bone loss between the two groups. On the other hand, there was statistical significant difference in posterior bone loss being higher in the non-rigid group.
Conclusion: telescopic two-implant mandibular overdenture showed great success and acceptance among patients, no implant failure or screw loosening occurred during one year using the overdenture, bone loss was in the accepted values. Within the limitations of this study, rigid telescopes can be used on two implants to retain mandibular overdenture opposed by maxillary complete denture.