Primary study · included by 1 review

Helio 2019 (Monteiro)

ProbableThe reviews cited this study without a PMID, DOI or NCT, so it is matched by first author and year. Two different studies by the same author in the same year could be merged here.

Included by

Comparative outcomes of xenogeneic collagen matrices and autogenous graft-based techniques to increase mucosal thickness and keratinised mucosa width at implant sites: are autologous grafts still the gold standard? A systematic review and meta-analysis of randomised clinical trials.

Non-Cochrane · intervention · 2026 · cited as Helio 2019 (Monteiro) · Results, Study selection; Figures 2-4 and 6; reference list

Outcome this study informs	Pooled effect	Evidence	Certainty
Increase in buccal mucosal thickness (MT), mm Non-crosslinked xenogeneic collagen matrix (XCM*) with bilaminar technique vs Subepithelial connective tissue graft (CTG) with bilaminar technique · 3 months	MD 0.27 [0.05, 0.49]	5 studies · 152 participants	GRADE not reported
Increase in buccal mucosal thickness (MT), mm Xenogeneic collagen matrices (XCM*, non-crosslinked, and VCMX, crosslinked) with bilaminar technique vs Subepithelial connective tissue graft (CTG) with bilaminar technique · 3 months	MD 0.27 [0.12, 0.42]	9 studies · 294 participants	GRADE not reported

1 including review in total.