Dimensional changes of soft tissue following immediate flapless implant placement and provisionalization with or without xenograft: A Randomized Clinical Trial

Determination of soft tissue changes in immediate implant placement with and without xenograft bone graft with the immediate temporary prosthesis in patients referred to the Department of Oral and Maxillofacial Surgery, School of Dentistry, Islamic Azad University of Medical Sciences and Private Clinic in 1400

A clinical trial with parallel case and control groups, one-way blind, randomized, on 34 patients, Paired means power option of PASS 11 software was used for randomization

Patients undergo extraction of one of their anterior teeth in the dental area 14-24. They receive an immediate implant. case group underwent xenografting and the healing placement, but the control group without xenograft. taking impression is done to make a provisionalization and after 2 weeks, it will be placed.

Inclusion criteria: extraction of one of the maxillary anterior teeth in the cosmetic zone (number of teeth 14-24) and placement of immediate implants with provisionalization; Continuation of the buccal wall bone of the extracted tooth socket with sufficient thickness; Existence of more than 2 mm gap between the implant and the socket buccal wall Exclusion criteria: Periodontal disease; Presence of systemic or local diseases that are opposed to implant placement; Pregnancy; Cigarette and drug addiction; Presence of acute infection at the implant site; Patient undergoing radiotherapy; Use of drugs that disrupt bone and gingival tissue repair; Patients with parafunctional habits such as Bruxism or Clenching

1) Case group: receiving immediate implant+bone graft 2) Control group: receive immediate implants

The thickness and height of the buccal soft tissue of the implant area, in both case and control groups, during the evaluation period of 3 and 6 months.

the selected patients will be divided into two groups by the Balanced block randomization method with a size of 4 blocks. Participants will be randomly allocated (1:1) to group 1 (with bone graft) and group 2 (without bone graft). The randomization sequence will be generated by an independent investigator using computer software ( www.randomization.com ). Balanced Blocked randomization will be used, with a block size of 4. The surgeon will open sequentially numbered, sealed envelopes only after the implants will be inserted at the day of surgeries. Although the surgeon will be aware of the allocated arm, soft tissue dimentional changes outcome assessor will be kept blinded to the allocation.

the selected patients are unaware of their assignment to the case group (performing xenograft bone graft) or the control group (not performing xenograft bone grafting).