title: Immediately loaded machined versus rough surface dental implants in edentulous jaws: One-year postloading results of a pilot randomised controlled trial.
abstract: OBJECTIVE
  To compare the effectiveness of immediately loaded total prostheses supported by implants with a roughened surface versus implants with a machined/turned surface.
  
  
  METHODS
  Fifty edentulous or to-be-rendered edentulous patients requiring an implant-supported cross-arch prosthesis, were randomised either to receive four to eight implants with a roughened surface (25 patients) or with a machined/turned surface (25 patients). Provisional metal-reinforced acrylic prostheses were delivered 48 h after implant placement. Provisional prostheses were replaced after 4 months, by definitive screw-retained metal-resin cross-arch restorations. Outcome measures were prosthesis and implant failures, any complications and peri-implant marginal bone level changes. Patients were followed 1 year after loading.
  
  
  RESULTS
  One year after loading no patient dropped out. No prosthesis failed, but two machined implants were found to be mobile at definitive impression taking in 1 patient (Fisher's exact test: P = 0.312; difference in proportions = 4%; 95% Cl: -10 to 18). No complications occurred. Both groups presented a significant peri-implant marginal bone loss at 1 year after loading (P < 0.0001), -0.64 ± 0.20 mm for rough implants and -0.68 ± 0.23 mm for turned implants, respectively, with no statistically significant differences between the two groups (P = 0.482; mean difference = 0.04 mm; 95% Cl: -0.17 to 0.25).
  
  
  CONCLUSIONS
  Up to 1 year after immediate loading, both implant surfaces provided good and similar results, however, the only two implants which failed early in the same patient had a machined surface. These preliminary results must be confirmed by larger trials with longer follow-ups.
authors.forename: Marco
authors.initials: M
authors.lastname: Esposito
authors.forename: Pietro
authors.initials: P
authors.lastname: Felice
authors.forename: Carlo
authors.initials: C
authors.lastname: Barausse
authors.forename: Roberto
authors.initials: R
authors.lastname: Pistilli
authors.forename: Giovanni
authors.initials: G
authors.lastname: Grandi
authors.forename: Massimo
authors.initials: M
authors.lastname: Simion
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000209:etiology; D003722:Dental Alloys / Q000737:chemistry; D045662:Dental Etching / Q000379:methods; D015921:Dental Implants / Q000009:adverse effects; D003764:Dental Materials / Q000737:chemistry; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D019232:Dental Restoration Failure; D003779:Denture Design; D003825:Denture, Complete, Immediate; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D057893:Immediate Dental Implant Loading / Q000009:adverse effects / Q000379:methods*; D007575:Jaw, Edentulous / Q000534:rehabilitation* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D013499:Surface Properties; D019415:Torque; D016896:Treatment Outcome
chemical_list: D000180:Acrylic Resins; D003722:Dental Alloys; D015921:Dental Implants; D003764:Dental Materials