This is a retrospective observational study of 50 implants placed between 2013 and 2023 from the same dental implant system (Osseospeed Profile, Dentsply Implants, Mölndal, Sweden).

The aim of this study is to evaluate the cumulative survival, success and complication rates obtained with the use of Osseospeed Profile EV implants in two clinical centres with similar characteristics since its launch on the market in 2013, until today.

All clinical records of patients with this implant system will be collected and the following data will be recorded:

Patient gender Date of placement Dimensions and location of implant(s) placed Type of implantation Design of the implant-supported dental prosthesis, single or partial, screw-retained or cemented Date of last radiographic control Type of biological and/or mechanical complications that occurred In biological complications, presence or absence of inflammatory signs and presence or absence of peri-implant bone loss.

For mechanical complications, screw loosening, porcelain fracture, fracture of the prosthetic abutment or fracture of the implant.

Date of explantation if present

The mean, standard deviation (SD), and percentage will be calculated for all recorded parameters.

A life table will be made with cumulative survival and success rate (CSR), according to Kaplan-Meier analysis. Correlations and regression analysis will be performed to assess the influence of the variables on the outcomes

Conclusions will be drawn based on the results obtained.

Inclusion Criteria:

• Patients who have come to private dental clinics with the need to rehabilitate a single edentulous space in the posterior mandibular area.

Exclusion Criteria:

• None

All patients who receive Astra Tech Osseospeed Profile dental implant system placement at two private dental clinics in Spain.