Survival of NobelDirect implants: an analysis of 550 consecutively placed implants at 18 different clinical centers.

BACKGROUND A recently introduced implant, the NobelDirect (Nobel Biocare AB, Göteborg, Sweden), has previously been documented with substantial bone resorption in a large number of operated cases. PURPOSE The aim of this study was to evaluate the failure rate of NobelDirect implants in a retrospective multicenter survey. MATERIALS AND METHODS A total of 550 NobelDirect implants consecutively placed in over 269 patients at 18 centers were evaluated with regard to failure rate after an average follow-up of about 1 year. RESULTS The overall failure percentage was 10.9% (59 failures). The 58 implants not loaded directly showed only one failure (1.7%) versus 58 failures (11.8%) of those implants that were loaded directly. A chemical x-ray photoelectron spectroscopy analysis of an implant from the original batch showed up to 3.5% silicon at parts of the implants. A retrieval analysis of one implant removed at 2 years after placement demonstrated bone resorption down to the level of the fifth thread. CONCLUSIONS It is concluded that the NobelDirect implant, if placed with a punch procedure, ground down in situ, and loaded directly, shows an unusually high failure rate at 1 year.

[1]  T. Albrektsson,et al.  Tissue Preservation in Caries Treatment , 2001 .

[2]  W. Chee,et al.  Scalloped dental implants: a retrospective analysis of radiographic and clinical outcomes of 17 NobelPerfect implants in 6 patients. , 2006, Clinical implant dentistry and related research.

[3]  R. Glauser,et al.  Immediate occlusal loading of Brånemark TiUnite implants placed predominantly in soft bone: 1-year results of a prospective clinical study. , 2003, Clinical implant dentistry and related research.

[4]  A. Wennerberg,et al.  Some soft tissue characteristics at implant abutments with different surface topography. A study in humans. , 2003, Journal of clinical periodontology.

[5]  T. Albrektsson.  Hydroxyapatite-coated implants: a case against their use. , 1998, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[6]  T. Albrektsson,et al.  Short-term clinical results of Nobel Direct implants: a retrospective multicentre analysis. , 2008, Clinical oral implants research.

[7]  Roger Watson,et al.  Tissue-integrated prostheses , 1985 .

[8]  Simone Windisch,et al.  Immediate occlusal loading of Brånemark System TiUnite implants placed predominantly in soft bone: 4-year results of a prospective clinical study. , 2005, Clinical implant dentistry and related research.

[9]  Jörgen Lindström,et al.  Intra-osseous anchorage of dental prostheses. I. Experimental studies , 1971 .

[10]  T. Albrektsson,et al.  State of the art in oral implants. , 1991, Journal of clinical periodontology.

[11]  A. Lussi,et al.  Early loading of non-submerged titanium implants with a sandblasted and acid-etched surface. 5-year results of a prospective study in partially edentulous patients. , 2003, Clinical oral implants research.

[12]  George A. Zarb,et al.  Tissue-Integrated Prostheses: Osseointegration in Clinical Dentistry , 1985 .

[13]  T. Albrektsson.  On long-term maintenance of the osseointegrated response. , 1993, Australian prosthodontic journal.

[14]  P I Brånemark,et al.  A 15-year study of osseointegrated implants in the treatment of the edentulous jaw. , 1981, International journal of oral surgery.

[15]  L. Rasmusson,et al.  A 10-year follow-up study of titanium dioxide-blasted implants. , 2005, Clinical implant dentistry and related research.

[16]  T. Albrektsson,et al.  Direct loading of Nobel Direct and Nobel Perfect one-piece implants: a 1-year prospective clinical and radiographic study. , 2007, Clinical oral implants research.

[17]  Drago Cj,et al.  A retrospective analysis of osseotite NT implants in clinical practice: 1-year follow-up. , 2006 .

[18]  J. Malmqvist,et al.  Clinical report on the success of 47 consecutively placed Core-Vent implants followed from 3 months to 4 years. , 1990, The International journal of oral & maxillofacial implants.

[19]  T. Albrektsson,et al.  Edentulousness--an oral handicap. Patient reactions to treatment with jawbone-anchored prostheses. , 1987, Journal of oral rehabilitation.

[20]  P. Branemark,et al.  Osseointegrated implants in the treatment of the edentulous jaw. Experience from a 10-year period. , 1977, Scandinavian journal of plastic and reconstructive surgery. Supplementum.

[21]  Tomas Albrektsson,et al.  Osseointegrated Oral implants , 1988 .

[22]  R. Glauser,et al.  Periimplant soft tissue barrier at experimental one-piece mini-implants with different surface topography in humans: A light-microscopic overview and histometric analysis. , 2005, Clinical implant dentistry and related research.

[23]  C. Drago,et al.  A retrospective analysis of osseotite NT implants in clinical practice: 1-year follow-up. , 2006, The International journal of periodontics & restorative dentistry.

[24]  N Freiberg,et al.  Osseointegrated oral implants. A Swedish multicenter study of 8139 consecutively inserted Nobelpharma implants. , 1988, Journal of periodontology.