Machined versus roughened immediately loaded and finally restored single implants inserted flapless: Preliminary 6 month data from a split mouth randomised controlled trial.
PURPOSE To compare the outcome of immediately loaded single implants with a machined or a roughened surface. MATERIALS AND METHODS Fifty patients had two implant sites randomly allocated to receive flaplessplaced single Syra implants (Sweden Martina) one with a machined and one with a roughened surface (sand blasted with zirconia powder and acid etched) according to a split mouth design. To be loaded immediately, implants had to be inserted with a torque superior to 50 Ncm. Implants were restored with definitive crowns in direct occlusal contact within 48 h. Patients were followed for 6 months after loading. Outcome measures were prosthetic and implant failures and complications. RESULTS Two machined implants and four roughened implants were not loaded immediately. Six months after loading no dropout occurred. One implant loaded late, which had a rough implant surface, failed 20 days after loading (P (McNemar test) 0.625; difference in proportions 0.04; 95% CI: 0.15 to 0.07) Three crowns had to be remade on machined implants and four on roughened implants (P (McNemar test) 1.000; difference in proportions 0.02; 95% CI: 0.12 to 0.08) Three machined and five roughened implants experienced complications (P (McNemar test) 0.625; difference in proportions 0.04; 95% CI: 0.15 to 0.07) There were no statistically significant differences between groups for crown and implant losses as well as complications. CONCLUSIONS Up to 6 months after loading both machined and roughened flapless placed and immediately loaded single implants provided good and similar results, however, longer follow ups are needed to evaluate the long term prognosis of implants with different surfaces.
European journal of oral implantology