Ridge Preservation Following Tooth Extraction Using Two Mineralized Cancellous Bone Allografts

December 18, 2017 updated by: Brian L Mealey, The University of Texas Health Science Center at San Antonio

Ridge Preservation Following Tooth Extraction Using Mineralized Freeze-Dried Bone Allograft Compared to PUROS Mineralized Bone Allograft

The study is a 2-arm, parallel-design, randomized, prospective clinical trial designed to examine histologic wound healing following ridge preservation using bone allograft that has been prepared by either freeze-drying or via a non-freeze-dried solvent process.This entire protocol involves procedures that are standard care. All materials are FDA-approved materials being used in an FDA-approved manner. The test group subjects will have extraction sockets grafted with a cancellous non-freeze-dried bone allograft (called PUROS graft). This test group will be compared to an active control group using cancellous freeze-dried bone allograft (called FDBA). The null hypothesis is that there will be no significant difference in formation of new vital bone between treatment groups (primary outcome).

Each subject will provide a single non-molar tooth site for study treatment. After tooth extraction, the graft material will be placed and covered by a resorbable collagen membrane. Following 3 months of healing, the dental implant will be place, at which time a core of bone will be removed from the site as part of the preparation for the implant. The core biopsy will then be evaluated for the primary histologic outcome of % vital bone formation and secondary histologic outcome of % residual graft material.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The study is designed to examine histologic wound healing following ridge preservation using cancellous bone allograft that has been prepared either by freeze-drying (FDBA) or by a solvent-based processing method (PUROS). This entire protocol involves procedures that are standard care. All materials are FDA-approved materials being used in an FDA-approved manner. The test group subjects will have extraction sockets grafted with a cancellous non-freeze-dried bone allograft (called PUROS graft). This test group will be compared to an active control group using cancellous freeze-dried bone allograft (called FDBA). The null hypothesis is that there will be no significant difference in formation of new vital bone between treatment groups (primary outcome).

Each subject will provide a single non-molar tooth site for study treatment. After tooth extraction, the graft material will be placed and covered by a resorbable collagen membrane. Following 3 months of healing, the dental implant will be place, at which time a core of bone will be removed from the site as part of the preparation for the implant. The core biopsy will then be evaluated for the primary histologic outcome of % vital bone formation and secondary histologic outcome of % residual graft material.

Study Type

Interventional

Enrollment (Actual)

44

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Texas
      • San Antonio, Texas, United States, 78229
        • UT Health Science Center at San Antonio, School of Dentistry

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 89 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:Patients will be included in this study if they qualify the following inclusion criteria:

  • Live within 50 miles from the School of Dentistry, University of Texas Health Science Center at San Antonio
  • Are able to attend a minimum of 6 visits over a 4-5 month period, as required by the study protocol
  • A single rooted tooth that has been identified as requiring extraction
  • Desire a dental implant to replace the missing tooth
  • Have adequate restorative space for a dental implant-retained restoration
  • Have at least 10mm of alveolar bone height, without impinging on the maxillary sinus or inferior alveolar canal.
  • Have a dehiscence of the buccal or lingual bony plate of the tooth socket extending no more than 50% of the total depth of the socket.
  • Female patients who have undergone a hysterectomy, tubal ligation, or menopause, and non-pregnant women of child-bearing potential.
  • Are nonsmokers or former smokers. Current smokers may only be included if they smoke <10 cigarettes per day

Exclusion Criteria:

  • Patients who live more than 50 miles from the School of Dentistry, University of Texas Health Science Center at San Antonio
  • Patients who do not meet all the inclusion criteria or who will not cooperate with the required follow-up schedule.
  • Patients will are mentally incompetent, prisoners, or pregnant.
  • Pregnant women or women intending to become pregnant during the study period.
  • Smokers who smoke >10 cigarettes per day
  • Clinical and/or radiographic determinations which will preclude inclusion in this study are: Active infection other than periodontitis; Inadequate bone dimensions or restorative space for a dental implant; Presence of a disease entity, condition or therapeutic regimen which decreases probability of soft tissue and bony healing, e.g., poorly controlled diabetes, chemotherapeutic and immunosuppressive agents, autoimmune diseases, history of bisphosphonate use or long-term steroid therapy; Positive medical history of endocarditis following oral or dental surgery.
  • Sensitivity or allergy to Bacitracin, Gentamicin, Polymyxin B Sulfate, alcohol and/or surfactants

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: PUROS (Non-Freeze-Dried bone allograft)
Ridge preservation bone grafting surgery with Non-Freeze-Dried cancellous bone allograft (PUROS)
Device: PUROS (Ridge Preservation bone grafting surgery)
Ridge preservation bone grafting after tooth extraction
Active Comparator: FDBA (Freeze-Dried bone allograft)
Ridge preservation bone grafting surgery with Freeze-Dried cancellous bone allograft (FDBA)
Device: FDBA (Ridge Preservation bone grafting surgery)
Ridge preservation bone grafting after tooth extraction

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
% Vital Bone Formation (Histological)
Time Frame: 3 months after ridge preservation
histologic determination of % of vital bone formation
3 months after ridge preservation

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
% Residual Graft Material (Histological)
Time Frame: 3 months after ridge preservation
histologic determination of % of residual bone graft material
3 months after ridge preservation

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

The University of Texas Health Science Center at San Antonio

Investigators

  • Principal Investigator: Brian L. Mealey, DDS, MS, UT Health Science Center at San Antonio, School of Dentistry

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2015

Primary Completion (Actual)

September 1, 2017

Study Completion (Actual)

September 1, 2017

Study Registration Dates

First Submitted

July 31, 2015

First Submitted That Met QC Criteria

August 3, 2015

First Posted (Estimate)

August 4, 2015

Study Record Updates

Last Update Posted (Actual)

January 23, 2018

Last Update Submitted That Met QC Criteria

December 18, 2017

Last Verified

November 1, 2017

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 15-0552H

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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