Connective Tissue Graft Versus Mucograft Collagen Matrix for Coverage of Multiple Gingival Recession Defects

NCT ID: NCT01440426

Last Updated: 2018-07-13

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE4
• Total Enrollment: 187 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2011-09-30
• Study Completion Date: 2015-06-30

Brief Summary

This study deals with coverage of multiple denuded roots. The current standard treatment requires surgical correction and uses soft tissue taken from the roof of the mouth to enhance results. The hypothesis of this trial is that a synthetic collagen matrix (called Mucograft) can be used to replace soft tissue taken from the subject. If the collagen matrix will prove to be equally as effective as the patient own tissue, it will be possible to avoid a more extensive surgery and decrease pain and discomfort.

Detailed Description

Objectives The main objective of this study is to assess if the Mucograft Collagen Matrix reduces morbidity, shortens time to recovery and improves patient based outcomes with respect to the use of autologous connective tissue graft harvested from the patient own palate when used to obtain root coverage of multiple adjacent gingival recessions.

The secondary objective is to assess the non-inferiority - in terms of complete root coverage, percentage of root coverage and professional evaluation of aesthetics - of the use of Mucograft Collagen Matrix and autologous connective tissue harvested from the patient's own palate.

Design and Outcomes This will be a parallel group, standard of care-controlled, assessor-blind, randomized, multicenter, multinational, clinical trial.

The statistical design will be a superiority trial in terms of the primary outcomes (patient based outcomes) and non-inferiority trial in terms of the professional outcomes measuring root coverage and aesthetics.

Sample size has been estimated in 140 subjects per treatment arm using a pilot case series analyzed with a multilevel statistical approach and a non inferiority margin of 0.25 mm in recession coverage.

Randomization will be performed by computer generated random codes, using random permuted blocks with a block size of 4 to avoid uneven splits and minimization for the key prognostic factor cigarette smoking. Allocation will be concealed to the surgeons until completion of preparation of the recipient bed by opaque envelopes. A central study registrar will perform patient registration.

Study locations will include academic centers and a practice-based research network in Italy, Switzerland, Germany, Belgium, France, Spain and Greece.

A single examiner, blind with respect to the treatment assignment, will perform all measurements at each center. Trained personnel not involved with the surgical intervention will: i) administer patient questionnaires, ii) provide instructions and collect patient diaries. A single calibrated investigator with specific experience in using the specific score will centrally perform assessment of esthetic scores on standardized digital images.

A biostatistician blind with respect to treatment assignment will perform the analysis.

Interventions and Duration The two intervention groups will consist of surgery with connective tissue graft (standard of care control) and surgery with the application of Mucograft Collagen Matrix (MCM, Test group). Experienced clinicians will deliver treatment consisting of root coverage surgery using coronally advanced flaps, the most utilized procedure for coverage of multiple recessions. Surgery will be standardized and the same procedures/materials will be employed to ensure consistency.

Follow-up of individual patients will be 6 months (to be extended to 3 years if funding will be available)

Conditions

Gingival Recession

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: SINGLE

Study Groups

Autologous connective tissue graft

Soft tissue harvested from patient palate

Group Type: ACTIVE_COMPARATOR

Autologous connective tissue graft with rotated papilla flap

Intervention Type: PROCEDURE

Subepithelial connective tissue graft harvested from hard palate

Collagen Matrix Construct

Mucograft collagen matrix manufactured by Geistlich AG, Switzerland

Group Type: EXPERIMENTAL

Collagen matrix construct (Mucograft)

Intervention Type: DEVICE

Mucograft Collagen Matrix combined with rotated papilla flap

Interventions

Autologous connective tissue graft with rotated papilla flap

Subepithelial connective tissue graft harvested from hard palate

Intervention Type: PROCEDURE

Collagen matrix construct (Mucograft)

Mucograft Collagen Matrix combined with rotated papilla flap

Intervention Type: DEVICE

Other Intervention Names

Subepithelial connective tissue graft; Mucograft gingival augmentation

Eligibility Criteria

Inclusion Criteria

• 2-4 adjacent gingival recession (one at least 3 mm deep)

Exclusion Criteria

• Interdental attachment loss greater than 1 mm at recession sites

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 70 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

The European Research Group on Periodontology (ERGOPerio)

NETWORK

Sponsor Role: collaborator

Maurizio Tonetti

NETWORK

Sponsor Role: lead

Responsible Party

Maurizio Tonetti

Executive DIrector

Responsibility Role: SPONSOR_INVESTIGATOR

Principal Investigators

Maurizio Tonetti, DMD PhD

Role: PRINCIPAL_INVESTIGATOR

The European Research Group on Periodontology (ERGOPerio)

Pierpaolo COrtellini, MD

Role: PRINCIPAL_INVESTIGATOR

The European Research Group on Periodontology (ERGOPerio)

Locations

ICPDOI

Brussels, , Belgium

Praxis Dr. Halben

Hamburg, , Germany

Praxis Prof Huerzeler - Dr Zuhr

Munich, , Germany

Praxis Prof Wachtel - Dr Bolz

Munich, , Germany

Praxis Prof. Topoll

Münster, , Germany

Clinic Fourmousis

Athens, , Greece

University of FLorence

Florence, , Italy

Practice Prof Giulio Rasperini

Piacenza, , Italy

University of Pisa

Pisa, , Italy

Clinia Zabalegui

Bilbao, , Spain

Clinica Guerrero

Málaga, , Spain

Praxis Wallkamm

Langenthal, , Switzerland

Praxis Burkhardt

Zurich, , Switzerland

Countries

Belgium; Germany; Greece; Italy; Spain; Switzerland

Other Identifiers

ERGOPerio 11-01

Identifier Type: -

Identifier Source: org_study_id