Immediately loaded machined versus rough surface dental implants in edentulous jaws: One-year postloading results of a pilot randomised controlled trial.

Abstract

PURPOSE:

To compare the effectiveness of immediately loaded total prostheses supported by implants with a roughened surface versus implants with a machined/turned surface.

MATERIALS AND METHODS:

Fifty edentulous or to-be-rendered edentulous patients requiring an implant-supported cross-arch prosthesis, were randomised either to receive four to eight implants with a roughened surface (25 patients) or with a machined/turned surface (25 patients). Provisional metal-reinforced acrylic prostheses were delivered 48 h after implant placement. Provisional prostheses were replaced after 4 months, by definitive screw-retained metal-resin cross-arch restorations. Outcome measures were prosthesis and implant failures, any complications and peri-implant marginal bone level changes. Patients were followed 1 year after loading.

RESULTS:

One year after loading no patient dropped out. No prosthesis failed, but two machined implants were found to be mobile at definitive impression taking in 1 patient (Fisher's exact test: P = 0.312; difference in proportions = 4%; 95% Cl: -10 to 18). No complications occurred. Both groups presented a significant peri-implant marginal bone loss at 1 year after loading (P < 0.0001), -0.64 ± 0.20 mm for rough implants and -0.68 ± 0.23 mm for turned implants, respectively, with no statistically significant differences between the two groups (P = 0.482; mean difference = 0.04 mm; 95% Cl: -0.17 to 0.25).

CONCLUSIONS:

Up to 1 year after immediate loading, both implant surfaces provided good and similar results, however, the only two implants which failed early in the same patient had a machined surface. These preliminary results must be confirmed by larger trials with longer follow-ups.

• Authors: Marco Esposito, Pietro Felice, Carlo Barausse, Roberto Pistilli, Giovanni Grandi, Massimo Simion
• Journal: European journal of oral implantology (Eur J Oral Implantol) Vol. 8 Issue 4 Pg. 387-96 ( 2015) ISSN: 1756-2406 [Print] England
• PMID: 26669548 (Publication Type: Comparative Study, Journal Article, Randomized Controlled Trial)

Chemical References

• Acrylic Resins
• Dental Alloys
• Dental Implants
• Dental Materials

Topics

• Acrylic Resins (chemistry)
• Adult
• Aged
• Aged, 80 and over
• Alveolar Bone Loss (etiology)
• Dental Alloys (chemistry)
• Dental Etching (methods)
• Dental Implants (adverse effects)
• Dental Materials (chemistry)
• Dental Prosthesis Design
• Dental Prosthesis, Implant-Supported
• Dental Restoration Failure
• Denture Design
• Denture, Complete, Immediate
• Female
• Follow-Up Studies
• Humans
• Immediate Dental Implant Loading (adverse effects, methods)
• Jaw, Edentulous (rehabilitation, surgery)
• Male
• Middle Aged
• Pilot Projects
• Surface Properties
• Torque
• Treatment Outcome