Implant-supported fixed prostheses in the edentulous maxilla. A 2-year clinical and radiological follow-up of treatment with non-submerged ITI implants.

OBJECTIVES To evaluate the survival rate of non-submerged solid-screw ITI dental implants with a rough (titanium plasma sprayed, TPS) surface in the edentulous maxilla after 1 and 2 years of loading. MATERIAL AND METHOD Twenty-five patients (mean age 64 years) with edentulous upper jaws received five-seven implants and, after a mean healing time of 6.9 months, screw-retained implant-supported fixed prostheses. A total of 146 ITI solid screw TPS implants were inserted. The diameter of 56% of the implants was smaller (3.3 mm) than the standard (4.1 mm) and the diameter of the rest (44%) was standard. The bone quantity of the majority of the patients was low and the bone quality poor. Clinical parameters were registered at baseline and at two annual follow-ups. Radiological examinations and assessments were also made at these times. RESULTS Mean marginal bone level at baseline was measured at a point 4.52 mm (range 1.45-7.70, SD 1.2) apical of the reference point. Mean bone loss from baseline to 1 year of loading was 0.24 mm (SD 0.9, P=0.002) and from 1 year to 2 years of loading 0.15 mm (SD 0.4, P<0.001). Five implants failed, four of which were early failures prior to loading. One implant failed shortly after bridge installation. The cumulative survival rate was 96.6% after 1 and 2 years. CONCLUSION ITI TPS solid-screw implants in combination with fixed prostheses had successful survival rates and were found to be a viable treatment alternative in the edentulous maxilla.

[1]  L. Sennerby,et al.  An update on the clinical documentation on currently used bone anchored endosseous oral implants. , 1997, Dental update.

[2]  T. A. Larheim,et al.  Method for radiographic assessment of alveolar bone level at endosseous implants and abutment teeth. , 1979, Scandinavian journal of dental research.

[3]  J. Ainamo,et al.  Problems and proposals for recording gingivitis and plaque. , 1975, International dental journal.

[4]  D. Brocard,et al.  A multicenter report on 1,022 consecutively placed ITI implants: a 7-year longitudinal study. , 2000, The International journal of oral & maxillofacial implants.

[5]  C. T. ten Bruggenkate,et al.  Treatment of fully edentulous patients with ITI implants. , 2000, Clinical Oral Implants Research.

[6]  M. Hallman,et al.  A prospective study of treatment of severely resorbed maxillae with narrow nonsubmerged implants: results after 1 year of loading. , 2001, The International journal of oral & maxillofacial implants.

[7]  J. Hirsch,et al.  Biological factors contributing to failures of osseointegrated oral implants. (II). Etiopathogenesis. , 1998, European journal of oral sciences.

[8]  I Naert,et al.  The influence of static and dynamic loading on marginal bone reactions around osseointegrated implants: an animal experimental study. , 2001, Clinical oral implants research.

[9]  A Frykholm,et al.  A clinical and radiological two-year follow-up study of maxillary overdentures on osseointegrated implants. , 1993, Clinical oral implants research.

[10]  Babbush Ca.  Titanium plasma spray screw implant system for reconstruction of the edentulous mandible. , 1986 .

[11]  N P Lang,et al.  The diagnosis and treatment of peri-implantitis. , 1998, Periodontology 2000.

[12]  Babbush Ca.  ITI endosteal hollow cylinder implant systems. , 1986 .

[13]  B. Rangert,et al.  Marginal bone resorption at different treatment concepts using Brånemark dental implants in anterior mandibles. , 2001, Clinical implant dentistry and related research.

[14]  J Gunne,et al.  Osseointegrated implants in edentulous jaws: a 2-year longitudinal study. , 1990, The International journal of oral & maxillofacial implants.

[15]  D Buser,et al.  The original one-stage dental implant system and its clinical application. , 1998, Periodontology 2000.

[16]  N. Lang,et al.  The effect of subcrestal placement of the polished surface of ITI implants on marginal soft and hard tissues. , 1996, Clinical oral implants research.

[17]  D. Buser,et al.  Basic surgical principles with ITI implants. , 2000, Clinical oral implants research.

[18]  B. d'Hoedt,et al.  Hard and soft tissue reactions to ITI screw implants: 3-year longitudinal results of a prospective study. , 1997, The International journal of oral & maxillofacial implants.

[19]  D Buser,et al.  The treatment of partially edentulous patients with ITI hollow-screw implants: presurgical evaluation and surgical procedures. , 1990, The International journal of oral & maxillofacial implants.

[20]  S. Hellem,et al.  Nonsubmerged implants in the treatment of the edentulous upper jaw: a prospective clinical and radiographic study of ITI implants--results after 1 year. , 2000, Clinical implant dentistry and related research.

[21]  N. Ferrigno,et al.  A long-term follow-up study of non-submerged ITI implants in the treatment of totally edentulous jaws. Part I: Ten-year life table analysis of a prospective multicenter study with 1286 implants. , 2002, Clinical oral implants research.

[22]  J. Hirsch,et al.  Biological factors contributing to failures of osseointegrated oral implants. (I). Success criteria and epidemiology. , 1998, European journal of oral sciences.

[23]  T. A. Larheim,et al.  Measurements of alveolar bone height at tooth and implant abutments on intraoral radiographs. A comparison of reproducibility of Eggen technique utilized with and without a bite impression. , 1982, Journal of clinical periodontology.

[24]  R. Mericske-Stern.  Clinical evaluation of overdenture restorations supported by osseointegrated titanium implants: a retrospective study. , 1990, The International journal of oral & maxillofacial implants.

[25]  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.

[26]  Jean-Pierre Bernard,et al.  The use of reduced healing times on ITI implants with a sandblasted and acid-etched (SLA) surface: early results from clinical trials on ITI SLA implants. , 2002, Clinical oral implants research.

[27]  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.