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Changes in Alveolar Bone Height and Width Following Ridge Augmentation Using Bone Graft and Membranes
Author(s) -
Simon Barry I.,
Von Hagen Stanley,
Deasy Michael J.,
Faldu Mitesh,
Resnansky Dasha
Publication year - 2000
Publication title -
journal of periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.036
H-Index - 156
eISSN - 1943-3670
pISSN - 0022-3492
DOI - 10.1902/jop.2000.71.11.1774
Subject(s) - crest , alveolar crest , alveolar ridge , ridge , medicine , dentistry , dental alveolus , midpoint , orthodontics , iliac crest , implant , anatomy , surgery , mathematics , geometry , geology , paleontology , physics , quantum mechanics
Background: Clinical observation suggests the amount of bone height and width created during guided bone regeneration (GBR) to augment alveolar ridges is not retained during healing. A study was designed to determine: 1) whether the amount of osseous structure 4 months postoperatively after GBR was significantly less than the amount surgically created; and 2) if this change was uniform over the area treated.Methods: Nineteen extraction sites (10 patients) were treated with GBR prior to placing endosseous implants. Allograft (DMFDB) and a bioabsorbable membrane were employed. Standardized measurements were taken of alveolar height and width 1) prior to augmentation; 2) after placement of graft and membrane; and 3) following 4 months of healing. Width measurements were taken 3 mm, 5 mm, and 10 mm from the crest at 3 intervals: the mesio‐distal midpoint of the edentulous area and 3 mm mesial and distal to the midpoint. Height measurements were recorded at the mesio‐distal midpoint and points 3 mm mesial and distal to the midpoint.Results: Loss in width of supplemented bone after 4 months of healing ranged from 52.1% to 58.0% 3 mm from the crest, 47.6% to 67.4% 5 mm from the crest, and 39.1% to 46.7% 10 mm from the crest. Loss of augmented height averaged 14.7% in the center of the edentulous area but ranged from 60.5% to 76.3% 3 mm mesial and distal to the midpoint.Conclusions: The results indicate significant nonuniform loss of augmented alveolar height and width during GBR healing. The implications of these findings impact preoperative augmentation planning for endosseous implantology. J Periodontol 2000;71:1774‐1791.