The aim of this study is to investigate the effects of the application of a citric acid + tetracycline gel solution during 90 or 180 seconds compared to no conditioning in the outcomes of treatment of Miller's class I or II recession defects by subepithelial connective tissue graft.
Adult patients showing Miller's class I or II recession defects requiring root coverage were recruited to participate in the study. All patients were submitted to non surgical periodontal therapy consisting of scaling and root planing, prophylaxis, and oral hygiene instruction in order to reduce/eliminate gingival inflammation. After that, patients were randomly allocated to three different treatment groups based on root conditioning: G0- no conditioning; G90- root conditioning for 90 seconds; G180- root conditioning for 180 seconds. Allocation was defined by a software. Root coverage was performed by subepithelial connective tissue graft (SCTG) in all treated sites by the same operator, who performed the indicated root treatment. Periodontal parameters were investigated at baseline and at 1, 3, 6 and 12 months post-operatively by a blinded trained expertise different from operator and included: pocket depth, recession height, clinical attachment level, width of keratinized gingiva, sulcular bleeding index and plaque index. Hypersensitivity at recession sites was also investigated at baseline and at 7 days, 14 days, 1, 3, 6 and 12 months after treatment according to visual analogic scale (VAS).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
36
Application of a citric acid + tetracycline gel solution (1:1) for decontamination of root surfaces during the treatment of recession defects by subepithelial connective tissue graft
School of Dentistry at Bauru- University of São Paulo; Clinics of Periodontics
Bauru, São Paulo, Brazil
percentage of root coverage (%REC)
Percentage of root coverage obtained at 1 year after procedure. Represented by the difference of baseline recession height and final recession height divided by baseline recession height multiplied by 100 (in percentage).
Time frame: one year
reduction in recession height
Linear difference between final recession height and baseline recession height, measured by a millimeter periodontal probe as the distance from cementum-enamel junction and gingival margin at the center of recession defect (in mm).
Time frame: one year
increase in the width of keratinized gingiva
Linear difference between final and baseline width of keratinized gingiva. Measured with a millimeter periodontal problem as the distance from gingival margin to mucogingival junction (in mm).
Time frame: one year
gain in clinical attachment level
Linear difference between final and baseline clinical attachment level. Measured with a millimeter periodontal probe as the distance from cementum-enamel junction and the bottom of the sulcus or pocket (in mm).
Time frame: one year
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