Maxillary Sinus Augmentation With Xenogeneic Bone Graft Associated or Not With Fibrin Rich in Platelets and Leukocytes Produced by Horizontal Centrifugation: A Randomized Clinical Trial.

Summary

The objective of study is to evaluate the influence of the use of Platelet Rich Fibrin (PRF) from the patient's produced by a new horizontal centrifugation protocol associated with particulate xenogenous bone graft in the rehabilitation of atrophic maxillary sinus for early osseointegrated implants plancement. In a split-mouth model, twelve patients in need of rehabilitation with at least two bilateral implants in the regions of atrophic maxillary sinus will simultaneously undergo bone reconstruction using deproteinized particulate xenogenous bone (Bio-Oss Small®; Geistlich AG, Wolhusen , Switzerland). Randomly, one of the surgical sites of each patient will be reconstructed using the associated technique of solid PRF + Liquid PRF with the xenogen material, where at the end of the grafting procedure, both sites will be protected by a collagen membrane (Bio-Gide® Compressed; Geistlich AG, Wolhusen, Switzerland) positioned over the surgical access of the maxillary sinus. During the research, cone-beam computed tomography scans will be performed preoperatively, immediately after surgical procedure, 3 months after maxillary sinus reconstruction, after immediate implants placement and 12 months after functional load of the implants for comparative volume measurement of tissue gain and the maintenance of the grafted tissue. During the implant surgery, bilateral biopsies will be collected after 4 months of the regenerative surgical procedure during the early dental implants surgery by virtually guided surgery. The stability of the implants will be measured by means of resonance frequency analysis (ISQ) after the immediate postoperative period and 6 postoperative months as the clinical success rates of the implants after 12 months with functional load. The tissue samples will be used for histological, histomorphometric, immunohistochemistry and microtomographic analysis. All data obtained will be statistically analyzed.

Conditions

• Platelet-rich Fibrin
• Sinus Floor Augmentation
• Cone-beam Computed Tomography
• Dental Implants
• Bone Substitutes
• Maxillary Sinus
• Atrophic Maxilla

Interventions

PROCEDURE

Maxilar Sinus augmentation

The patients will be submitted to bilateral sinus augmentation using two different techniques to provide enough bone tissue for dental implants placement.

PROCEDURE

Dental implant placement using guided surgery

After 4 months of sinus augmentation, patients will be prepared to receive dental implants for oral rehabilitation. Performed by guided surgery the implants will be placed at the best location for the rehabilitation and at the place were the sinus lighting were performed.

Sponsors & Collaborators

• University of Sao Paulo

  lead OTHER

Principal Investigators

• Dr. Michel R Messora, Phd · Universidade de São Paulo - FORP-USP

• Gabriel GD Reis, Phd Student · Universidade de São Paulo - FOR-USP

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

TRIPLE

Model

PARALLEL

Eligibility

Min Age

35 Years

Max Age

75 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2021-03-17

Primary Completion

2023-04-30

Completion

2023-07-15

Countries

• Brazil

Study Locations