A Randomized Comparative Study of Two Techniques to Optimize the Root Coverage Using a Porcine Collagen Matrix

Abstract

The aim of this randomized controlled clinical study was to compare the extended flap technique (EFT) with the coronally advanced flap technique (CAF) using a porcine collagen matrix (PCM) for root coverage. Twenty patients with two bilateral gingival recessions, Miller class I or II on non-molar teeth were treated with CAF+PCM (control group) or EFT+PCM (test group). Clinical measurements of probing pocket depth (PPD), clinical attachment level (CAL), recession height (RH), keratinized tissue height (KTH), keratinized mucosa thickness (KMT) were determined at baseline, 3 and 6 months post-surgery. At 6 months, the mean root coverage for test group was 81.89%, and for control group it was 62.80% (p<0.01). The change of recession depth from baseline was statistically significant between test and control groups, with an mean of 2.21 mm gained at the control sites and 2.84 mm gained at the test sites (p=0.02). There were no statistically significant differences for KTH, PPD or CAL comparing the two therapies. The extended flap technique presented better root coverage than the coronally advanced flap technique when PCM was used.

Root coverage procedures for treating single and multiple recession‐type defects: An updated Cochrane systematic review

“…Forty‐eight studies (reported in 57 papers) were included in the review, with 20 providing data for meta‐analyses. Nine RCTs had their data reported in two articles each (i.e., according to the follow‐up period or type of data (i.e., clinical or patient‐reported outcomes) .…”

Influence of tooth location on coronally advanced flap procedures for root coverage

“…The k value for interreviewer agreement for potentially relevant articles was 0.85 (titles and abstracts) and 0.89 (full‐text articles), indicating a consistent agreement between the two reviewers. The supplementary data of 4 articles were provided by 4 authors after being contacted . Hence, 18 articles reporting 399 localized GRs treated with CAF, with a mean follow‐up of 9.6 months, were included in the present systematic review (Table ).…”

“…Twelve articles were RCTs, 2 case‐control and 4 were case series, The general characteristics of the included articles are depicted in Table .…”

“…CAF alone was investigated in nine study whereas five articles evaluated CAF + CTG, 2 CAF + Xenogeneic Collagen Matrix (XCM), 1 CAF + Acellular Dermal Matrix (ADM), 4 CAF + Enamel Matrix Derivative (EMD), 1 CAF + Free Rotated Papilla Autograft (FRPA), 1 CAF + Platelet‐Rich Plasma (PRP), and 1 CAF + Periosteal Pedicle Graft (PPG) . The general characteristics of the intervention and results are depicted in Table .…”

“…The results of bias risk assessment for the included RCTs, using The Cochrane Risk of Bias Tool, are summarized in supplementary Data S6 in the online Journal of Periodontology ; 6 articles were considered to have a low risk of bias, 4 studies were considered to have a moderate risk of bias, and 2 studies a high risk of bias.…”