title: Clinical results of implant placement in resorbed ridges using simultaneous guided bone regeneration: a multicenter case series.
abstract: OBJECTIVE
  The purpose of this case series was to evaluate the new bone formation following guided bone regeneration (GBR) with a calcium phosphosilicate (CPS), alloplastic bone putty at peri-implant dehiscence defects and to assess survival rate of implants placed in the augmented sites after 12 months of function.
  
  
  METHODS
  Implants were placed in patients exhibiting Seibert class I ridge defects resulting in peri-implant dehiscence defects. The defects were treated following GBR principles with the use of a CPS alloplastic bone graft putty in combination either with a collagen membrane or a titanium mesh. The height of each bony dehiscence was clinically measured at the time of implant placement and again during second-stage surgery. The percentage of complete defect coverage, frequency of adverse events, and risk factors for residual defect were determined.
  
  
  RESULTS
  Thirty-six implants were placed in 26 patients. Twenty-seven of the 36 sites employed a collagen membrane in conjunction with the CPS while the remaining nine sites utilized a titanium membrane. Mean gain in bone height was 3.23 ± 2.04 mm, with 75 % of the peri-implant defects achieving complete regeneration. A negative correlation was identified between patient age and complete coverage of the peri-implant defect (p = 0.026). The implant survival rate at 12 months was 97.22 %.
  
  
  CONCLUSIONS
  Use of CPS bone putty during delayed implant placement at peri-implant dehiscence sites either in combination with a collagen membrane or a titanium mesh results in predictable defect coverage.
  
  
  CONCLUSIONS
  The handling characteristics of CPS putty may simplify GBR protocol. Implants placed in conjunction with GBR have a very good survival rate after 1 year of follow-up.
authors.affiliation: Department of Prosthodontics, TU Dresden, Dresden, Germany, ioannis.konstantinidis@uniklinikum-dresden.de.
authors.forename: Ioannis
authors.initials: I
authors.lastname: Konstantinidis
authors.forename: Tarun
authors.initials: T
authors.lastname: Kumar
authors.forename: Udatta
authors.initials: U
authors.lastname: Kher
authors.forename: Panagiotis D
authors.initials: PD
authors.lastname: Stanitsas
authors.forename: James E
authors.initials: JE
authors.lastname: Hinrichs
authors.forename: Georgios A
authors.initials: GA
authors.lastname: Kotsakis
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001861:Bone Regeneration; D015921:Dental Implants; D006801:Humans; D008875:Middle Aged; D055815:Young Adult
chemical_list: D015921:Dental Implants