Clinical results of implant placement in resorbed ridges using simultaneous guided bone regeneration: a multicenter case series.

OBJECTIVES

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.

MATERIALS AND 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 %.

CONCLUSION

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.

CLINICAL RELEVANCE

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.