Thirty-six month follow-up of 25 patients treated with combination anorganic bovine-derived hydroxyapatite matrix (ABM)/cell-binding peptide (P-15) bone replacement grafts in human infrabony defects. I. Clinical findings.
BACKGROUND
Long-term evaluation of periodontal therapy is important for clinical decision making.


METHODS
A synthetic cell-binding peptide (P-15) combined with anorganic bovine-derived hydroxyapatite bone matrix (ABM) was evaluated as a bone replacement graft in human periodontal osseous defects. Following initial preparation and reevaluation, flap surgery was performed. A variety of 1-, 2-, 3-wall bony defects were curetted and root surfaces subjected to mechanical debridement only. The bone defects were grafted with ABM/P-15, and the host flaps replaced or slightly coronally positioned. Weekly, then monthly deplaquing was performed until surgical reentry at 6 to 7 months. Patients were then followed on approximate 3-month recalls for 3 years. Twenty-five of the original 31 patients qualified for long-term evaluation in that their ABM/P-15 treated sites did not receive any additional therapy at the time of reentry.


RESULTS
Significant clinical changes for the overall group of bony defects included improvement in mean clinical attachment level from 5.4 mm at surgery to 4.5 mm at the 6-month reentry to 3.8 mm at 3 years. There was also a decrease in mean probing depth from 5.3 mm at surgery to 3.1 mm at the 6-month reentry to 2.9 mm at 3 years. The mean gingival recession changed from +0.1 mm at surgery to 1.4 mm at the 6-month reentry to 0.9 mm at 3 years. All of these differences were at least P <0.05 from surgery to the 6-month reentry, and surgery to 3 years, but were not significant from reentry to 3 years via repeated measures analysis of variance.


CONCLUSIONS
These favorable 3-year results with ABM/P-15 suggest that it may have a beneficial effect in the long-term clinical management of infrabony defects. Further long-term randomized controlled studies are needed to better assess the role of ABM/P-15 in long-term healing of periodontal osseous defects.
Yukna
Raymond A
RA
Department of Periodontics, Louisiana State University School of Dentistry, New Orleans 70119-2799, USA. ryukna@LSUHSC.edu
Krauser
Jack T
JT
Callan
Donald P
DP
Evans
Gerald H
GH
Cruz
Renee
R
Martin
Millicent
M
D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000145:classification / Q000601:surgery*; D000704:Analysis of Variance; D000818:Animals; D001857:Bone Matrix / Q000637:transplantation*; D018786:Bone Substitutes / Q000627:therapeutic use*; D002417:Cattle; D002908:Chronic Disease; D003094:Collagen / Q000627:therapeutic use*; D003475:Curettage; D003646:Debridement; D003773:Dental Plaque / Q000517:prevention & control; D017886:Durapatite / Q000627:therapeutic use*; D005260:Female; D005500:Follow-Up Studies; D005889:Gingival Recession / Q000145:classification / Q000601:surgery; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D010446:Peptide Fragments / Q000627:therapeutic use*; D017622:Periodontal Attachment Loss / Q000145:classification / Q000601:surgery; D010514:Periodontal Pocket / Q000145:classification / Q000601:surgery; D010518:Periodontitis / Q000145:classification / Q000601:surgery; D013223:Statistics as Topic; D018709:Statistics, Nonparametric; D013524:Surgical Flaps; D014092:Tooth Root / Q000601:surgery
D018786:Bone Substitutes; D010446:Peptide Fragments; C407062:cell-binding peptide P-15; D003094:Collagen; D017886:Durapatite