Xenogenic Collagen Matrix and Subepithelial Connective Tissue Graft in the Treatment of Gingival Recession

change in visible plaque index:

1. Score 0 - No plaque 2. Score 1 - Separate flecks of plaque at the cervical margin of the tooth 3. Score 2 - A thin continuous band of plaque at the cervical margin of the tooth 4. Score 3 - A band of plaque wider then 1mm covering less than 1/3rd of the crown of the tooth 5. Score 4 - Plaque covering at least 1/3rd but less than 2/3rd of the crown of the tooth 6. Score 5 - Plaque covering 2/3rd or more of the crown of the tooth

Time frame: 1) baseline, 2) at 2 weeks postoperative,3) 1 month and 4) 3 month postoperative

Recession width (RW)

at the cemento-enamel junction using periodontal probe of University of North Carolina UNC15 (Medesey®-Italy).

Time frame: 1) at baseline, 2) at 2 weeks postoperative, 3) at 1 month postoperative, 4) and at 3 months postoperative.

Width of keratinized tissue (KT)

from the free gingival margin to the mucogingival junction using periodontal probe of University of North Carolina UNC15 (Medesey®-Italy).

Time frame: 1) baseline, 2) 2 weeks postoperative, 3) 1 month postoperative and 4) 3 months postoperative.

Thickness of gingival tissue (GT)

with an injection needle and a silicon marker, at the mid-buccal aspect below the gingival margin.

Time frame: 1) at baseline, and 2) 3 months postoperative.

Probing depth (PD)

the distance between the gingival margin and the bottom of the pocket measured at the mid-buccal aspect of the tooth using periodontal probe of University of North Carolina UNC15 (Medesey®-Italy).

Time frame: 1) at baseline, 2) and 3 months postoperative.

Clinical attachment level (CAL)

distance between the CEJ and the bottom of the pocket measured at the mid-buccal aspect of the tooth using periodontal probe of University of North Carolina UNC15 (Medesey®-Italy).

Time frame: 1) at baseline, 2) at 3 months postoperative.

Healing index

score 1 = uneventful healing with no gingival edema, erythema, suppuration, patient discomfort, or flap dehiscence. score 2 = uneventful healing with slight gingival edema, erythema, patient discomfort, or flap dehiscence, but no suppuration. score 3 = poor wound healing with significant gingival edema, erythema, patient discomfort, flap dehiscence, or any suppuration.

Time frame: 1) at two weeks following surgery and (2) at one month following surgery.

Pain index (PI)

Using Visual Analogue scale (VAS) (2001 Crichton), Patients will be asked to select among 100 scores (0 indicating no pain at all , 50 indicating average pain, and 100 indicating very painful).

Time frame: 1) at 2 hours, 2) 24 hours, 3) 48 hours,4) 72 hours following surgery and 5) at 1-week after surgery.

Patient Perceptions

Using 100 cm Visual Analogue Scale (VAS)Patients will be asked to select among 100 scores (0 indicating very bad, 50 indicating average, and 100 indicating excellent results).

Time frame: at three months post-surgery.

Change in root sensitivity

Using a 100 cm-visual analog scale (VAS), patients' root sensitivity will be recorded with zero indicating no pain or sensitivity, 50 indicating moderate pain or sensitivity and 100 indicating worst pain or sensitivity possible.

Time frame: 1) at baseline, 2) and at 3 months postoperative.