title: Soft tissue conditions and marginal bone levels of implants with a laser-microtextured collar: a 5-year, retrospective, controlled study.
abstract: OBJECTIVE
  To compare clinical and radiographic outcomes of implants with a Laser-Lok®-microtextured collar to implants with a resorbable blast textured (RBT) collar after a 5-year follow-up period.
  
  
  METHODS
  Thirty-four implants with a Laser-Lok®-microtextured collar (test group [TG]) and 31 implants with an RBT collar (control group [CG]) were placed in 45 non-smoking, periodontally healthy patients. The full-mouth plaque score, full-mouth bleeding score, number of sites with plaque, and the number of sites with bleeding on probing (BOP) were recorded at baseline, and at 1-, 2-, 3-, 4-, and 5-year follow-up. Probing depth (PD) and mucosal recession were assessed at baseline and after the 5-year follow-up period. The radiographic marginal bone loss (MBL) was calculated by subtracting the bone level at the time of crown insertion from the bone level at the 5-year follow-up.
  
  
  RESULTS
  An implant survival rate of 94% and of 90% was reported for the TG and the CG, respectively. No statistical differences were found between the study groups for presence of plaque (10.1% vs. 25%) or for number of sites with BOP (10.3% vs. 23%). The differences between both study groups were statistically significant for mean MBL (0.81 ± 0.24 vs. 2.02 ± 0.32 mm), mean PD (2.32 ± 0.44 vs. 4.25 ± 0.87 mm), and mean mucosal recession (0.16 ± 0.3 vs. 0.22 ± 0.3 mm).
  
  
  CONCLUSIONS
  Within the limitations of this study, results suggest that the laser-microtextured implant collar surface may provide more favorable conditions for the attachment of hard and soft tissues, and reduce the level of MBL.
authors.affiliation: Department of Periodontology, University "Federico II" Napoli, Napoli, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Iorio-Siciliano
authors.forename: R
authors.initials: R
authors.lastname: Matarasso
authors.forename: R
authors.initials: R
authors.lastname: Guarnieri
authors.forename: M
authors.initials: M
authors.lastname: Nicolò
authors.forename: D
authors.initials: D
authors.lastname: Farronato
authors.forename: S
authors.initials: S
authors.lastname: Matarasso
mesh_terms: D000328:Adult; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging*; D003442:Crowns; D003758:Dental Implantation, Endosseous / Q000379:methods; D015921:Dental Implants; D003774:Dental Plaque Index; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D005260:Female; D005500:Follow-Up Studies; D005889:Gingival Recession / Q000000981:diagnostic imaging*; D006801:Humans; D007834:Lasers; D008297:Male; D008875:Middle Aged; D010512:Periodontal Index; D012189:Retrospective Studies; D013499:Surface Properties; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants
keywords: clinical study; laser microtextured surface; marginal bone loss; soft tissue conditions