Effect of Xenogeneic Collagen Matrix on the Peri-implant Tissues of Immediate Implants.

Effect of a Volumetrically Stable Xenogeneic Collagen Matrix on the Peri-implant Tissues of Immediate Post-extraction Implants: a Randomized Controlled Clinical Study.

The present clinical trial will try to demonstrate the efficacy of stable xenogeneic collagen matrix in maintaining the vestibular coronal soft tissue volume and the stabilization of mid-buccal margin position in immediate post-extraccion sockets compared with the use of autogenous connective tissue grafts.

Inclusion Criteria:

1. Adequate oral hygiene (21).
2. Sufficient interocclusal space (≥6 mm) to place a provisional crown without occlusion.
3. Presence of adjacent teeth. Only one tooth gap.
4. Presence of soft tissue and cortical buccal bone of the tooth to be extracted according to the classification of Elian et al. 2007
5. Adequate bone quantity in the apical region of the tooth to be extracted (assessed on the CBCT).

Exclusion Criteria:

1. Patients with medical conditions that affect bone and soft tissue metabolism.
2. Uncontrolled endocrine disorders.
3. Alcohol and drug abuse.
4. Previous history of immunodeficiency syndromes.
5. Patients who smoke> 10 cigarettes a day.
6. Active periodontal disease.
7. Absence of a tooth adjacent to the tooth to be treated.
8. Oral lesions of the untreated mucosa.
9. Recent previous history (<6 months) of local radiotherapy or chemotherapy.
10. Bruxism or severe parafunctions.
11. Pregnant patients.