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Peri‐implant bone regeneration using recombinant human bone morphogenetic protein‐2 in a canine model: a dose‐response study
Author(s) -
Tatakis Dimitris N.,
Koh Alexander,
Jin Lisa,
Wozney John M.,
Rohrer Michael D.,
Wikesjö Ulf M. E.
Publication year - 2002
Publication title -
journal of periodontal research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.31
H-Index - 83
eISSN - 1600-0765
pISSN - 0022-3484
DOI - 10.1034/j.1600-0765.2002.00021.x
Subject(s) - osseointegration , beagle , medicine , dentistry , radiodensity , implant , alveolar ridge , bone morphogenetic protein , dental alveolus , regeneration (biology) , surgery , radiography , chemistry , biology , biochemistry , gene , microbiology and biotechnology
The objective of this study was to evaluate the effect of recombinant human bone morphogenetic protein‐2 (rhBMP‐2) dose on alveolar ridge augmentation and dental implant osseointegration. Bilateral, 5 mm supraalveolar, peri‐implant defects were surgically created in 6 beagle dogs. rhBMP‐2 (0.05, 0.1 or 0.2 mg/ml) in an absorbable collagen sponge (ACS) carrier was molded around the fixtures and wounds were closed. Treatment variations were alternated between animals (incomplete block design). Animals were sacrificed at week 8 postsurgery. Nine of twelve jaw quadrants healed uneventfully. Two jaw quadrants exhibited wound failure by week 4 and one by week 8 postsurgery. Radiographic bone regeneration was observed in defects without wound failure from week 4 postsurgery. Radiolucent voids of variable size and shape were observed and regressed over time. In weeks 6 through 8, there was an apparent increase in bone density and trabecular structure, while bone height and volume decreased. Histometric analysis revealed limited differences in bone regeneration between experimental conditions. Bone regeneration area averaged (±SD) 1.0±0.5, 3.5± 1.4 and 2.3±0.4 mm 2 for the 0.05, 0.1 and 0.2 mg/ml dose, respectively. There were no significant differences in osseointegration. Osseointegration in newly formed bone averaged 19± 4%, 18± 10% and 21±6% for the 0.05, 0.1 and 0.2 mg/ml rhBMP‐2 sites, respectively. Collectively, the data suggest that there are no dramatic differences in bone induction and osseointegration within the selected dose and observation interval.