title: 6-mm-long implants loaded with fiber-reinforced composite resin-bonded fixed prostheses (FRCRBFDPs). A 5-year prospective study.
abstract: OBJECTIVE
  To evaluate the clinical and radiographic outcomes and the survival rates of fiber-reinforced composite resin-bonded fixed prostheses (FRCRBFDPs) placed in the posterior area supported by two short (6 mm) implants.
  
  
  METHODS
  Twenty consecutive patients received 40 SLActive 6-mm-long implants with a diameter of 4.1 mm (n = 29) or 4.8 mm (n = 11). Insertion torques and RFA (Resonance Frequency Analysis) were measured at implant installation. The prosthetic rehabilitation was performed after 8 weeks from insertion with a screw-retained two- or three-unit fixed dental prosthesis fabricated of FRCRBFDPs. Implant survival rates and marginal bone levels were evaluated at various time intervals until 5 years after loading.
  
  
  RESULTS
  Two of 20 patients lost four implants supporting two FRCRBFDPs between the second and the third year of follow-up (cumulative survival rate: 90% after 5 years). Four patients suffered a fracture of the prosthetic reconstruction, and the success rate of the rehabilitation was 70% after 5 years. A mean marginal bone loss of 0.30 ± 0.34 mm was found after 5 years of function at the remaining implants.
  
  
  CONCLUSIONS
  The survival of short implants was 90% owing to two bridges losses in the maxilla. However, the success rate of FRCRBFDPs over 5 years was only at 70%.
authors.affiliation: Unit Scholar, Department of Biomedical and Neuromotorial Science, University of Bologna, Bologna, Italy.|ARDEC Academy, Ariminum Odontologica, Rimini, Italy.
authors.forename: Fabio
authors.initials: F
authors.lastname: Rossi
authors.affiliation: Center for Dental Medicine, University of Zurich, Zurich, Switzerland.|University of Bern, Bern, Switzerland.
authors.forename: Niklaus P
authors.initials: NP
authors.lastname: Lang
authors.affiliation: Unit Scholar, Department of Biomedical and Neuromotorial Science, University of Bologna, Bologna, Italy.
authors.forename: Emanuele
authors.initials: E
authors.lastname: Ricci
authors.affiliation: Unit Scholar, Department of Biomedical and Neuromotorial Science, University of Bologna, Bologna, Italy.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Ferraioli
authors.affiliation: Department of Biomedical and Neuromotorial Science, University of Bologna, Bologna, Italy.
authors.forename: Claudio
authors.initials: C
authors.lastname: Marchetti
authors.affiliation: ARDEC Academy, Ariminum Odontologica, Rimini, Italy.|POI - Programa Odontológico Internacional, Cartagena de Indias, Colombia.
authors.forename: Daniele
authors.identifier: http://orcid.org/0000-0003-2804-1632
authors.initials: D
authors.lastname: Botticelli
mesh_terms: D003188:Composite Resins; D001840:Dental Bonding; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D003830:Denture, Partial, Fixed; D005260:Female; D005500:Follow-Up Studies; D005898:Glass; D006801:Humans; D057893:Immediate Dental Implant Loading; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies
chemical_list: D003188:Composite Resins; D015921:Dental Implants
keywords: dental implants; early loading; fiber-reinforced resin-bonded; fixed partial dentures; implant length; prospective study; short implants