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Clin Oral Implants Res. 2013 Dec;24(12):1316-24. doi: 10.1111/clr.12000. Epub 2012 Sep 10.

Short implants with a nanometer-sized CaP surface provided with either a platform-switched or platform-matched abutment connection in the posterior region: a randomized clinical trial.

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  • 1Department of Oral and Maxillofacial Surgery and Maxillofacial Prosthetics, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands; Department of Fixed and Removable Prosthodontics, Centre for Dentistry and Oral Hygiene, University Medical Center Groningen and University of Groningen, Groningen, The Netherlands.

Abstract

OBJECTIVE:

To assess the performance of short nanorough implants (8.5 mm in length) provided with either a platform-matched or a platform-switched implant-abutment connection, placed in the resorbed posterior region of partially dentate patients.

MATERIALS AND METHODS:

A total of 149 implants with a dual-acid surface and a discrete crystalline deposition of nanometer-sized CaP particles, with either a platform-matched (control) or a platform-switched implant-abutment connection (test) were placed (randomly assigned) in 92 patients. Follow-up visits were conducted 1 month and 1 year after placing the implant crown. Outcome measures were implant survival, radiographic peri-implant bone loss, clinical parameters, and patient's satisfaction.

RESULTS:

One year after loading, 6 of 76 implants in the control group (survival 92.1%) and 3 of 73 implants in the test group (survival 95.9%) were lost (P = 0.33). Radiographic bone loss around test implants (0.50 ± 0.53 mm) was significantly less than around control implants (0.74 ± 0.61 mm; P < 0.005). With regard to implant survival, clinical parameters, and patient's satisfaction, no significant differences were observed between test and control group.

CONCLUSIONS:

For teeth replacements in the resorbed posterior region of partially dentate patients, short implants with a platform-switched implant-abutment connection showed significantly less peri-implant bone loss after 1 year in function, while implant survival, clinical parameters, and patient's satisfaction were independent of the implant-abutment connection design.

© 2012 John Wiley & Sons A/S.

KEYWORDS:

CaP; bone-level changes; dental implant; implant-abutment connection; nanoparticles; patient satisfaction; platform switching; short implants; surface roughness; survival

PMID:
22957911
[PubMed - indexed for MEDLINE]
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