Patient Morbidity After Palatal Free Gingival Grafts With or Without PRF Membranes Coverage

Study Overview
=================
Brief Summary
-----------------
This study evaluates postoperative morbidity of patients that undergo free gingival graft harvesting from palate with or without use of autogenous PRF (Platelet Rich Fibrin) membranes to cover the donor site.In the Test Group venous blood sampling was done in order to prepare PRF membranes used to cover the donor site, whereas in Control Group hemostatic agents with oxidized and regenerated cellulosa were used.

Official Title
-----------------
Patient Morbidity After Palatal Free Gingival Grafts With or Without PRF Membranes Coverage: a Comparative Randomized Clinical Trial

Conditions
-----------------
Postoperative Pain, Postoperative Complications, Gingival Recession

Intervention / Treatment
-----------------
* Biological: Platelet rich fibrin ( PRF)
* Drug: hemostatic agents with oxidized and regenerated cellulosa


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: FMPS (Full Mouth Plaque Score) and FMBS (Full Mouth Bleeding Score) < 20%, presence of two adjacent Miller's Class I and II recession defects on natural teeth (≥ 2mm in depth); Exclusion Criteria: contraindications for periodontal surgery taking medications or having diseases known to interfere with periodontal tissue health or healing and coagulation. smoking more than 10 cigarettes a day Gingival recessions on molar teeth were excluded.

Ages Eligible for Study
-----------------
Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Test Group<br>In the Test Group venous blood sampling was done in order to prepare PRF membranes used to cover the donor site of the connective tissue graft. | Biological: Platelet rich fibrin ( PRF)<br>* Venous blood was collected with a butterfly needle in two 10 mL tubes without anticoagulants or other chemicals. The tubes were immediately centrifuged at 3000 rpm for 10 minutes. At the end of centrifugation a fibrin clot (PRF) was obtained in the middle of the tube, just between the red corpuscles at the bottom and acellular plasma at the top. The PRF clot was taken from the tube and the red cells portion at the base of the clot was eliminated with sterile scissors Then the PRF was enveloped in sterile gauzes and positioned between two glass plates: the compression drove out the serum from the clot obtaining PRF membranes that were ready to be used in the surgical site.<br>|
| Active Comparator: Control Group<br>In Control Group hemostatic agents with oxidized and regenerated cellulosa were used to cover the donor site. | Drug: hemostatic agents with oxidized and regenerated cellulosa<br>* In the Control Group hemostatic agents with oxidized and regenerated cellulosa were sutured to the palatal wound with mattress suture ( silk 5/0).<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Post-operative Pain: VAS | The patient morbidity was evaluated with a questionnaire given to patients 1 week following surgery considering parameters such as post-operative pain, discomfort, bleeding, stress and inability to chew. The questionnaire included the evaluation of the intensity of these parameters on a Visual Analogical Scale (VAS) of 100 mm. Patients had to show their level of pain by indicating a position along a continuous line of 100mm between two end-points. The 0 end-point corresponded to abscence of pain, whereas the end-point at 100mm corresponded to the worst level of pain felt in life. Then the point indicated by the patient was measured in millimeters. | 2 weeks. | 
| Post-operative Discomfort | Discomfort was defined as the level of soreness experienced by the patients during the first post-operative week due to the palatal wound and how it influenced the ability to work and the quality of the sleep. The questionnaire included the evaluation of the intensity of post-operative discomfort on a Visual Analogical Scale (VAS) of 100 mm. Patients had to show their level of discomfort by indicating a position along a continuous line of 100mm between two end-points. The 0 end-point corresponded to abscence of discomfort whereas the end-point at 100mm corresponded to the worst possible discomfort . Then the point indicated by the patient was measured in millimeters. | 2 weeks | 
| Post-operative Stress | Stress was related to the level of apprehension and fear experienced by the patients of jeopardizing the palatal wound. The questionnaire included the evaluation of the intensity of post-operative stress on a Visual Analogical Scale (VAS) of 100 mm. Patients had to show their level of stress by indicating a position along a continuous line of 100mm between two end-points. The 0 end-point corresponded to abscence of stress whereas the end-point at 100mm corresponded to the worst possible stress . Then the point indicated by the patient was measured in millimeters. | 2 weeks | 
| Post-operative Inability to Chew | Inability to chew was described as the level of variation of the patients' eating habits due to the presence of the palatal wound. The questionnaire included the evaluation of the intensity of post-operative inability to chew on a Visual Analogical Scale (VAS) of 100 mm. Patients had to show their level of inability to chew by indicating a position along a continuous line of 100mm between two end-points. The 0 end-point corresponded to abscence of changes in their eating habits whereas the end-point at 100mm corresponded to the worst possible inability to chew. Then the point indicated by the patient was measured in millimeters. | 2 weeks | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Connective tissue graft, Platelet concentrates, PRF, Mucogingival surgery