Astra Tech, Brånemark, and ITI Implants in the Rehabilitation of Partial Edentulism: Two-Year Results

Purpose:To explore the soft tissue, marginal bone, and prosthetic complications (if any) of Astra Tech, Brånemark, and ITI implants supporting fixed prostheses during an observation period of 2 years. Materials:The study comprised 26 patients, who received 42 Astra Tech, 36 Brånemark, and 29 ITI implants. After 3 months of healing, abutment connections were performed for Astra Tech and Brånemark implants, and fixed prostheses were delivered to the patients at 4 months. At 6-month, 1-year, and 2-year recall appointments, plaque index, periimplant inflammation index, and bleeding index scores, were recorded. The marginal bone levels were also measured at 2-year recall by means of radiographic evaluation, and prosthetic complications were recorded throughout the study. Results:All implants survived during the 2-year observation period. The plaque index and periimplant inflammation index scores around Brånemark implants were higher than ITI and Astra Tech implants in the first year of function (P > 0.05). Marginal bone loss around ITI and Astra Tech implants was similar at 2 years (P > 0.05). The marginal bone loss around Brånemark implants was higher than Astra Tech implants (P < 0.05) but similar to ITI implants at 2-year recall appointment (P > 0.05). Fixed prostheses supported by ITI and Astra Tech implants did not experience prosthetic complications, and only 1 patient of the Brånemark group had porcelain veneer fracture. Conclusions:Astra Tech, Brånemark, and ITI implants supporting fixed prostheses had same survival rates (100%) in this study. ITI and Astra Tech implants had similar changes in marginal bone levels, whereas Brånemark implants had higher marginal bone loss, particularly in the first year of function.

[1]  A. Wennerberg,et al.  A retrospective analysis of early and delayed loading of full-arch mandibular prostheses using three different implant systems: clinical results with up to 5 years of loading. , 2009, Clinical implant dentistry and related research.

[2]  R. Brånemark,et al.  Characterization of the surface properties of commercially available dental implants using scanning electron microscopy, focused ion beam, and high-resolution transmission electron microscopy. , 2008, Clinical implant dentistry and related research.

[3]  Morton L Perel,et al.  Implant success, survival, and failure: the International Congress of Oral Implantologists (ICOI) Pisa Consensus Conference. , 2008, Implant dentistry.

[4]  P. Coulthard,et al.  Interventions for replacing missing teeth: 1- versus 2-stage implant placement. , 2007, The Cochrane database of systematic reviews.

[5]  J. Lindhe,et al.  Bone reactions to longstanding functional load at implants: an experimental study in dogs. , 2005, Journal of clinical periodontology.

[6]  M. Hallman,et al.  A three-year follow-up report of a comparative study of ITI Dental Implants and Brånemark System implants in the treatment of the partially edentulous maxilla. , 2004, Clinical implant dentistry and related research.

[7]  K. Gröndahl,et al.  Astra Tech and Brånemark system implants: a 5-year prospective study of marginal bone reactions. , 2004, Clinical oral implants research.

[8]  M. Hallman,et al.  Nonsubmerged and submerged implants in the treatment of the partially edentulous maxilla. , 2002, Clinical implant dentistry and related research.

[9]  B. Engquist,et al.  Simplified methods of implant treatment in the edentulous lower jaw. A controlled prospective study. Part I: one-stage versus two-stage surgery. , 2002, Clinical implant dentistry and related research.

[10]  G. Sagulin,et al.  Brånemark System and ITI Dental Implant System for treatment of mandibular edentulism. A comparative randomized study: 3-year follow-up. , 2001, Clinical oral implants research.

[11]  M. Quirynen,et al.  A prospective split-mouth comparative study of two screw-shaped self-tapping pure titanium implant systems. , 2000, Clinical oral implants research.

[12]  R. Wilson,et al.  A clinical, radiographic, and microbiologic comparison of Astra Tech and Brånemark single tooth implants. , 2000, Clinical implant dentistry and related research.

[13]  K. Gröndahl,et al.  Astra Tech and Brånemark System implants: a prospective 5-year comparative study. Results after one year. , 1999, Clinical implant dentistry and related research.

[14]  H. De Bruyn,et al.  Comparison of Brånemark fixture integration and short-term survival using one-stage or two-stage surgery in completely and partially edentulous mandibles. , 1998, Clinical oral implants research.

[15]  K. Nilner,et al.  Some clinical and radiographical features of submerged and non-submerged titanium implants. A 5-year follow-up study. , 1997, Clinical oral implants research.

[16]  J. Lindhe,et al.  The mucosal barrier following abutment dis/reconnection. An experimental study in dogs. , 1997, Journal of clinical periodontology.

[17]  D Buser,et al.  Long-term evaluation of non-submerged ITI implants. Part 1: 8-year life table analysis of a prospective multi-center study with 2359 implants. , 1997, Clinical oral implants research.

[18]  P. Kemppainen,et al.  A comparative prospective clinical study of two single-tooth implants: a preliminary report of 102 implants. , 1997, The Journal of prosthetic dentistry.

[19]  J. Wennström,et al.  The peri-implant hard and soft tissues at different implant systems. A comparative study in the dog. , 1996, Clinical oral implants research.

[20]  J. Fiorellini,et al.  Radiographic evaluation of crestal bone levels adjacent to nonsubmerged titanium implants. , 1992, Clinical oral implants research.

[21]  D Buser,et al.  Tissue integration of non-submerged implants. 1-year results of a prospective study with 100 ITI hollow-cylinder and hollow-screw implants. , 1990, Clinical oral implants research.

[22]  I P Sewerin,et al.  Errors in radiographic assessment of marginal bone height around osseointegrated implants. , 1990, Scandinavian journal of dental research.

[23]  N. Lang,et al.  The microbiota associated with successful or failing osseointegrated titanium implants. , 1987, Oral microbiology and immunology.

[24]  G Zarb,et al.  The long-term efficacy of currently used dental implants: a review and proposed criteria of success. , 1986, The International journal of oral & maxillofacial implants.

[25]  F Sutter,et al.  The reactions of bone, connective tissue, and epithelium to endosteal implants with titanium-sprayed surfaces. , 1981, Journal of maxillofacial surgery.

[26]  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.

[27]  H. Löe,et al.  PERIODONTAL DISEASE IN PREGNANCY. I. PREVALENCE AND SEVERITY. , 1963, Acta odontologica Scandinavica.