Twelve patients with isolated alveolar ridge defects bordered by teeth on each side were treated and followed for 12 months. The treatment involved use of a resorbable membrane and a particulate graft without complete flap closure. Measurements taken at 12 months showed a significant mean osseous gain of 3.27 ± 3.73 mm in mid-defect ridge width and an increase in height of 1.90 ± 2.50 mm.