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Linear (mean, SE) bone loss for xenogeneic collagen matrix (CMX) and collagen plug (CP) groups at six-months post-extraction and socket augmentation. Measures were obtained at 1mm, 3mm, and 5mm below the alveolar crest at the mid-buccal of the extraction site. No statistically significant differences at 1mm and 3mm (p>0.05). Statistically significant difference at 5mm (p<0.05) at 5mm in favor of the collagen plug group (*).
