A multicenter randomized controlled clinical trial using a new resorbable non-cross-linked collagen membrane for guided bone regeneration at dehisced single implant sites: interim results of a bone augmentation procedure.

The membrane exposure rate during the healing phase was lower in the CXP arm, and the mean bone gain after 6 months of healing achieved in defects protected with CXP was higher than with the BG membrane, although these differences did not reach statistical significance.

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