Alveolar Ridge Augmentation with Three-Dimensional Printed Hydroxyapatite Devices: A Preclinical Study

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Oral and Maxillofacial Surgery

Background:

• Alveolar ridge defects pose challenges in dental implantology.
• Effective bone regeneration strategies are crucial for successful augmentation.
• 3D printing offers novel scaffold designs for bone tissue engineering.

Purpose of the Study:

• To assess the efficacy of 3D printed hydroxyapatite micro- and macrochannel devices for alveolar ridge augmentation.
• To evaluate bone ingrowth and tissue response within these scaffolds in a canine model.

Main Methods:

• Fabrication of precise 3D hydroxyapatite scaffolds with micro- and macrochannels.
• Surgical implantation of scaffolds for alveolar ridge augmentation in a canine model.
• Histological analysis of undecalcified sections to evaluate bone ingrowth and inflammatory response.

Main Results:

• Both micro- and macrochannel hydroxyapatite grafts demonstrated significant bone ingrowth.
• New bone formation was observed within the channels and directly into the scaffold structure.
• Grafts elicited minimal inflammatory and fibrotic reactions, indicating good biocompatibility.

Conclusions:

• 3D printed hydroxyapatite micro- and macrochannel devices are effective for alveolar ridge augmentation.
• These scaffolds promote robust bone ingrowth, supporting their use in regenerative applications.
• The study confirms the potential of tailored 3D printed constructs for craniofacial bone regeneration.