title: Success and survival rates of narrow diameter implants made of titanium-zirconium alloy in the posterior region of the jaws - results from a 1-year follow-up.
abstract: OBJECTIVE
  The aim of the present prospective clinical study was to evaluate and to compare the success and survival rates of narrow diameter implants made of titanium-zirconium alloy and commercially pure titanium.
  
  
  METHODS
  Forty-two healthy adult patients scheduled for implant-supported single restorations were included in the study. In each patient, a titanium-zirconium alloy (Test group) or a commercially pure titanium (Control group) narrow diameter implants was installed in the posterior regions of the jaws. After 8 weeks of healing, all metal-ceramic single crowns were adapted to the implants and the patients enrolled in a plaque control program. The survival and success rates of the implants and the success rate of the implant-supported prosthesis were evaluated following 1 year of loading. Furthermore, mobility (M), suppuration (S), clinical probing depth (CPD), and bleeding on probing (BoP) were measured around the implants at 6 weeks of healing (T1) and 12 months after loading (T2).
  
  
  RESULTS
  In T2, survival and success rates for both groups were 95.2%. The corresponding value for the success rate of the implant-supported prosthesis was 100% in both groups. The average CPD was the following: 2.29 (±0.52) and 2.59 (±0.52) (P < 0.05) in the Test and Control groups, respectively, at T1; and 3.0 mm (±0.74) and 3.07 mm (±0.90) (P > 0.05) in the Test and Control groups, respectively, at T2. There was no statistically significant difference between groups concerning about S, M, and BoP at T1 and T2 (P > 0.05).
  
  
  CONCLUSIONS
  The present study suggests that, in a short-term follow-up, narrow diameter implants made of either titanium-zirconium alloy or commercially pure titanium may be used to support single crowns in the posterior portions of the jaws.
authors: Division of Periodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil.
authors: L
authors: L
authors: Tolentino
authors: F
authors: F
authors: Sukekava
authors: M
authors: M
authors: Seabra
authors: L A
authors: LA
authors: Lima
authors: J
authors: J
authors: Garcez-Filho
authors: M G
authors: MG
authors: Araújo
mesh_terms: D000497:Alloys; D001938:Brazil; D002138:Calibration; D003442:Crowns; D019250:Dental Implants, Single-Tooth; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D011446:Prospective Studies; D014025:Titanium; D016896:Treatment Outcome; D015040:Zirconium
chemical_list: D000497:Alloys; D015040:Zirconium; D014025:Titanium
keywords: biomaterials; bone implant interactions; clinical research; prosthodontics