Enhanced Bone Regeneration Using Demineralized Dentin Matrix: A Comparative Study in Alveolar Bone Repair

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Oral and Maxillofacial Surgery

Background:

• Alveolar bone resorption after tooth extraction complicates implant-supported restorations.
• Demineralised dentin matrix (DDM) shows potential for bone tissue regeneration.
• Varying demineralisation degrees of DDM require evaluation for optimal efficacy.

Purpose of the Study:

• To evaluate the bone-regenerating potential of dentin matrix with different demineralisation levels.
• To compare undemineralised (UDDM), partially demineralised (PDDM), and completely demineralised dentin matrix (CDDM) for alveolar bone repair.
• To assess the impact of DDM demineralisation on bone regeneration and osteopontin expression.

Main Methods:

• Extraction of mandibular anterior teeth in rabbits, followed by treatment with UDDM, PDDM, CDDM, or no treatment (control).
• Assessment of alveolar bone height and width using cone-beam computed tomography (CBCT) at 4 and 8 weeks.
• Histological analysis (H&E, Masson trichrome) and immunohistochemistry for osteopontin expression.

Main Results:

• CBCT showed increased bone height and width in all treated groups over time.
• Histology revealed new bone formation, with PDDM showing better integration of bone trabeculae.
• PDDM group exhibited higher osteopontin expression, indicating superior bone inductive potential.

Conclusions:

• Partially demineralised dentin matrix (PDDM) demonstrated the most effective bone induction and regeneration.
• PDDM outperformed CDDM and UDDM in promoting alveolar bone repair post-extraction.
• PDDM is a valuable scaffold for enhancing bone regeneration in clinical implant dentistry.