Clinical and radiographic outcomes of implants placed in extraction sites treated with alveolar ridge preservation: a 10-year retrospective analysis of a case series.

The aim of the present study was to evaluate clinical and radiographic outcomes of implants placed in alveolar sockets treated by means of alveolar ridge preservation (ARP) after a 10-years follow-up. Eleven patients treated with 11 implants placed after ARP using bovine-derived xenograft particles and collagen membrane were selected. Full mouth plaque score (FMPS), full mouth bleeding score (FMBS), probing depth (PD) at four sites per implant and radiographic marginal bone level (MBL) at mesial and distal aspects for each implant were recorded at baseline and after 10-years follow-up. The primary outcome was the radiographic marginal bone loss (mBL). The mBL was considered as the difference between MBL at baseline and after 10-years observation time. After 10 years follow-up, FMPS increased significantly (P>0.05), while not statistically significant differences were found in change of FMBS (P<0.05). After 10 years observation period, a significant increase of PD was observed at all sites (P>0.05) with except of the mesial aspects (P<0.05). Radiographic marginal bone loss (mBL) was 1.1±0.1 mm and 1.0±0.1 mm at mesial and distal sites, respectively. Whitin the limitations of the present study, implants placed in post-extraction sockets treated with ARP yielded stable clinical and radiographic results after 10-years follow-up.