Aim: Dental implant is becoming common option for replacement of lost teeth, there are various reasons for implant failure one of them is peri-implantitis. This systematic review compares clinical evaluation associated with bleeding on probing of soft tissue around dental implants restored with cement-retained and screw-retained restorations. Objectives: To evaluate bleeding on probing of soft tissue around screw-retained prosthesis on implant. To evaluate bleeding on probing of soft tissue around cement-retained prosthesis on implant. To compare bleeding on probing of soft tissue around screw-retained and cement-retained prosthesis on implant. Data Source: Electronic search of PubMed, Google Scholar, EMBASE, Institutional Library and manual search of various journals. Study Eligibility Criteria: Inclusion criteria: All the randomized control trails evaluating bleeding on probing of soft tissue around screw and cement-retained prosthesis. All the case reports evaluating bleeding on probing of soft tissue around screw and cement-retained prosthesis. All the case series evaluating bleeding on probing of soft tissue around screw- and cement-retained prosthesis. All the studies comparing bleeding on probing of soft tissue around screw-retained and cement-retained prosthesis on implant. All the studies conducted between 2000 and May 2018. Exclusion criteria: All the studies conducted in vitro. All the narrative reviews. All the letters to editor. All the articles published in other languages. Intervention: Cement-retained restorations. Results: A total number of 367 articles were identified through the electronic search. Only 5 articles were included on the basis of inclusion and exclusion criteria. All the 5 articles were reviewed by the two authors for their study characteristic. All the articles indicated that there was no evidence of different behavior of the peri-implant marginal bone and of the peri-implant soft tissue with screw- and cementretained prosthesis. Limitations: Total number of articles screened for full text are limited in number i.e., only 5 articles are screened in this systematic review. Conclusion: There was no evidence that one method of retention of the implant supported prosthesis i.e. Screw- and cement-retained prosthesis was biologically superior to the other during the time period for the respective study. The choice of cement-retained versus screw-retained implant restoration is based on their specific indications for the clinical situation.

Keywords: Cement-retained prosthesis; Screw retained prosthesis; Bleeding on probing.