Pontic Shield and Mineralized Plasmatic Matrix for Ridge Preservation (PONTIC-MPM)

Soaad Tolba Mohammed Tolba Badawi

Status: Completed

Conditions: Alveolar Ridge Preservation

Treatments: Procedure: Extraction + MPM; Procedure: Pontic Shield + MPM; Procedure: Tooth Extraction only; Procedure: Pontic Shield Only

Study type: Interventional

Funder types: Other

Identifiers

NCT07171879

R.25.09.22

Details and patient eligibility

About

This study is testing new methods to preserve the jawbone and gum tissue after removing a damaged front tooth. Normally, when a tooth is taken out, the bone and gums in that area shrink, which can make future dental treatment more difficult and affect appearance. A technique called Partial Extraction Therapy (Pontic Shield Technique) keeps part of the tooth root in place to help maintain the natural shape of the bone and gums. Another method, called Mineralized Plasmatic Matrix (MPM), uses a patient's own blood mixed with bone particles to support healing.

In this randomized clinical trial, 56 patients were assigned to one of four groups:

Group I: Tooth extraction only Group II: Tooth extraction with MPM grafting Group III: Pontic shield technique alone Group IV: Pontic shield technique with MPM grafting The main outcome measured was the amount of bone width preserved, using 3D X-rays (CBCT). Other outcomes included bone height and soft-tissue healing over 4 months.

This research will help determine whether the pontic shield technique, with or without MPM, provides better preservation of bone and gum tissue compared to tooth extraction alone.

Enrollment: 56 patients

Sex: All

Ages: 18 to 65 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Adults (≥18 years).
• Classified as ASA I (healthy) according to the American Society of Anesthesiologists Physical Status Classification.
• Presence of Type 1 extraction sockets (intact buccal bone and soft tissues).
• Adequate oral hygiene.
• Sufficient inter-arch space for prosthetic rehabilitation.
• Willingness to comply with study protocol and follow-up schedule.

Exclusion criteria

• Systemic conditions affecting bone metabolism or wound healing (e.g., uncontrolled diabetes, osteoporosis, immunosuppression).
• History of head and neck radiotherapy or bisphosphonate therapy.
• Acute infection or suppuration at the extraction site.
• Severe periodontal disease.
• Root caries or tooth mobility.
• Buccal bone plate loss due to vertical/horizontal root fractures or advanced periodontitis.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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56 participants in 4 patient groups

Extraction Only

Active Comparator group

Description:

Patients receive total tooth extraction in the esthetic maxillary zone without any adjunctive grafting.

Treatment:

Procedure: Tooth Extraction only

Extraction + MPM

Active Comparator group

Description:

Patients receive total tooth extraction in the esthetic maxillary zone, followed by grafting with MPM.

Treatment:

Procedure: Extraction + MPM

Pontic Shield Only

Active Comparator group

Description:

Patients undergo the pontic shield technique, in which a portion of the buccal root is preserved to maintain ridge contour, without grafting.

Treatment:

Procedure: Pontic Shield Only

Pontic Shield + MPM

Active Comparator group

Description:

Patients undergo the pontic shield technique combined with MPM grafting for ridge preservation.

Treatment:

Procedure: Pontic Shield + MPM