DOI: 10.11607/prd.2549, PubMed ID (PMID): 28834532Pages 863-874, Language: EnglishToia, Marco / Galli, Silvia / Cecchinato, Denis / Wennerberg, Ann / Jimbo, RyoThis retrospective study sought to compare a new implant (Astra Tech OsseoSpeed EV, Dentsply Sirona) with its predecessor (Astra Tech OsseoSpeed TX) by scanning electron microscopy and interferometry. Radiographic data from 19 patients who underwent implant restoration with EV (n = 49) with a median follow-up of 16 months were evaluated for mean bone level (MBL) changes from delivery of the definitive prosthesis. EV and TX did not differ in surface roughness, and both systems had a tight seal at the implant-abutment interface. The median MBL change of the EV was −0.02 mm mesiodistally after a median follow-up period of 16 months. Greater maintenance of MBL was found in the screw-retained restorations (n = 17) compared to cemented (0.35 ± 0.33 mm and −0.38 ± 0.76 mm, respectively; P = .03). The data suggest that EV shows minimal levels of bone loss and high implant survival.
