This investigation evaluated the predictability of dental implants subjecte
d to bone regeneration procedures at the time of insertion. Fifty-two lest
implants were inserted into sites with periimplant bone defects. A calcium
carbonate allograft material with or without a fibrin-fibronectin sealing s
ystem was used to fill the defects. Sixty control implants were inserted in
to an adequate volume of nonaugmented bone. Each of the 29 study patients r
eceived at least one test implant and one control implant. At the second-st
age surgery, fill of the bone defect was assessed as complete or incomplete
. The cumulative success rate was 91.7% (mean follow-up 55 mo) for the lest
implants and 93.2% (mean follow-up 59 mo) for the control implants. Within
the test group, implants with complete bone fill achieved 97.6% success ve
rsus 59. 1% success for implants with incomplete bone fill. These prelimina
ry results suggest that implants placed with simultaneous bone regeneration
procedures achieve long-term predictability that is comparable to that of
implants placed in an adequate volume of bone, provided that complete bone
fill of the periimplant defect is achieved. Long-term studies with other au
gmentation materials are needed to fully validate these findings.