A Volumetric Analysis of Soft and Hard Tissue Healing for Ridge Preservation and Socket Seal After Tooth Extraction

Summary

This study will be a randomized clinical trial involving a total of 24 subjects. The investigators propose to recruit subjects into 2 groups: 1) Extraction treated with xenograft bone substitute (BioOss Collagen®) + collagen dressing (HeliPlug®), 2) Extraction treated with xenograft bone substitute (BioOss Collagen®) + 3D-collagen matrix (Mucograft Seal®). All subjects recruited will have already been approved and treatment planned for extraction + implant placement by non-study personnel to avoid any potential conflict of interest. All subjects will have radiographs that show the tooth planned for extraction. Each subject will be eligible for only 1 tooth extraction + dental implant rehabilitation. After tooth extraction, subjects will receive a standard site preservation therapy consisted with xenograft bone substitute + collagen dressing or the alternative site preservation therapy consisted with xenograft bone substitute + 3D-collagen matrix. After the conventional 6-month healing period, subjects will receive a dental implant in the previous extracted site. During the dental implant procedure, a 2x5mm bone core biopsy + a 2mm gingival biopsy will be obtained from the implant site. Biopsy samples will be stored for future histological and histochemical analysis. After dental implant placement, all subjects will receive a healing abutment for soft tissue healing prior to implant restoration.

During the 6-month healing time after tooth extraction and site preservation therapy, subjects will return at week-1, week-2, week-4, month-3, and month-6 for intra-oral scanning for soft tissue volumetric acquirement. Subjects will receive a Cone beam computed tomography (CBCT) prior to extraction for the baseline hard-tissue volume measurement and appropriate extraction planning and at 6-month post-extraction for volumetric measurement and appropriate implant treatment planning.

Hard tissue analysis will be performed to compare linear ridge remodeling (baseline vs. 6-month healing). CBCT images will be analyzed by non-contact reverse engineering system. Soft tissue volumetric analysis will be performed to compare the soft tissue healing between BioOss Collagen + Mucograft Seal and BioOss Collagen + Collagen Dressing. Images captured with an intra-oral scanner collected at baseline, week-1, -2, -4, month-3, and month-6.

Conditions

• Tooth Extraction

Interventions

DEVICE

Xenograft bone substitute

Subjects requiring tooth extraction will have the hopeless tooth extracted. The extraction socket will be treated with xenograft bone substitute. At 6 months post-extraction a dental implant will be placed at the extraction site.

DEVICE

Collagen dressing

Subjects requiring tooth extraction will have the hopeless tooth extracted. The extraction socket treated with xenograft bone substitute will receive a collagen dressing to cover the surgical site.

DEVICE

3D-collagen matrix

Subjects requiring tooth extraction will have the hopeless tooth extracted. The extraction socket treated with xenograft bone substitute will receive a 3D collagen matrix to cover the surgical site.

Sponsors & Collaborators

• Geistlich Pharma AG

  collaborator INDUSTRY

• University of North Carolina, Chapel Hill

  lead OTHER

Principal Investigators

• Julie Marchesan, DDS, PhD · Assistant Professor Periodontology

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

80 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2016-07-31

Primary Completion

2018-02-28

Completion

2018-02-28

Countries

• United States

Study Locations