title: Clinical experiences with laser-welded titanium frameworks supported by implants in the edentulous mandible: a 10-year follow-up study.
abstract: BACKGROUND
  Long-term follow-up studies for more than 5 years are not available on laser-welded titanium frameworks.
  
  
  OBJECTIVE
  To report and compare 10-year data on implant-supported prostheses in the edentulous mandible provided with laser-welded titanium frameworks and conventional gold alloy frameworks.
  
  
  METHODS
  Altogether, 155 patients were consecutively treated with prostheses at abutment level with two generations of fixed laser-welded titanium frameworks (test groups). A control group of 53 randomly selected patients with conventional gold alloy castings was used for comparison. Clinical and radiographic 10-year data were collected for the three groups.
  
  
  RESULTS
  All patients followed-up for 10 years (n=112) still had fixed prostheses in the mandible (cumulative success rate [CSR] 100%). The overall 10-year cumulative success rate (CSR) was 92.8 and 100.0% for titanium and gold alloy frameworks, respectively. Ten-year implant cumulative survival rate (CSR) was 99.4 and 99.6% for the test and control groups, respectively. Average 10-year bone loss was 0.56 (SD 0.45) mm for the titanium group and 0.77 (SD 0.36) mm for the control group (p < 0.05). The most common complications for titanium frameworks were resin or veneer fractures, soft tissue inflammation, and fractures (12.9%) of the metal frame. Loose and fractured implant screw components were below 3%.
  
  
  CONCLUSIONS
  Excellent overall long-term results with 100% CSR could be achieved with the present treatment modality. Fractures of the metal frames and remade prostheses were more common for the laser-welded titanium frameworks, and the first generation of titanium frameworks worked poorly when compared with gold alloy frameworks during 10 years (p < 0.05). However, on average more bone loss was observed for implants supporting gold alloy frameworks during 10 years. The reasons for this difference are not clear.
authors.affiliation: The Brånemark Clinic, Public Dental Health Service, Göteborg, Sweden. anders.ortorp@vgregion.se
authors.forename: Anders
authors.initials: A
authors.lastname: Ortorp
authors.forename: Torsten
authors.initials: T
authors.lastname: Jemt
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000209:etiology; D003758:Dental Implantation, Endosseous / Q000009:adverse effects; D015921:Dental Implants / Q000009:adverse effects; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D012994:Dental Soldering; D005260:Female; D005500:Follow-Up Studies; D006047:Gold Alloys; D006801:Humans; D007575:Jaw, Edentulous / Q000534:rehabilitation; D007834:Lasers; D015993:Life Tables; D008297:Male; D008334:Mandible; D008875:Middle Aged; D012189:Retrospective Studies; D014025:Titanium; D014896:Welding
chemical_list: D015921:Dental Implants; D006047:Gold Alloys; D014025:Titanium