The Clinical Challenge: Combating Post-Extraction Resorption

The removal of a tooth triggers an inevitable biological remodeling process, with up to two-thirds of bone volume loss occurring within the first three months. Systematic reviews indicate that horizontal ridge width can decrease by as much as 29% to 63% within just six months. This resorption is primarily driven by the loss of the tooth-dependent bundle bone, which currently no grafting material can entirely prevent. For a surgeon, the challenge is maintaining enough volume and vertical height to ensure a stable and aesthetic implant placement without undergoing invasive secondary augmentations.

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Key Methodology & Insights (The MPDA/PRF Protocol)

This retrospective CBCT study evaluated 58 extraction sockets to determine the effectiveness of autologous dentin as a bone substitute:

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• Biological Composition: Dentin and cementum are almost identical to membranous bone but contain higher mineral content, which is beneficial for volume maintenance as the graft resorbs slowly.
• The Grafting Mixture: Sockets were grafted with a mixture of two-thirds particulate dentin autograft and one-third chopped PRF membranes.
• Processing Protocol: Extracted teeth were cleaned of all filling materials and decay, then ground into 300–1200 µm particles using a Smart Dentin Grinder.
• Flapless Precision: Teeth were extracted with great care to preserve the buccal bone plate without elevating a flap.
• Healing Acceleration: PRF promotes wound healing and angiogenesis, while the dentin provides the necessary scaffold for long-term site maintenance.
• Radiographic Results: After four months, the protocol resulted in a slight gain in vertical bone height (+1.1% buccal, +5.6% lingual) and a minimal horizontal width reduction of only 1.38 mm at 1 mm below the crest.
• Histological Success: Trephine samples confirmed new bone formation in close contact with dentin particles (ankylosis) with no signs of inflammation or fibrous encapsulation.

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"It is beneficial to utilize extracted teeth as autogenous grafting material, especially as their processing is now efficient and simple, rather than discarding them as waste."

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From Research to Practice

This "biological recycling" approach proves that the most effective grafting material might be sitting in the extraction forceps. By mastering the chair-side processing of autologous dentin and the use of PRF, clinicians can achieve high-level ridge preservation with superior biocompatibility. These biological protocols are a fundamental component of the MAXI Hybrid course, where we teach surgeons how to leverage autogenous materials to maximize predictability while minimizing the need for expensive synthetic bone substitutes.

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Expert Tip: To simplify the clinical procedure and protect the patient's anatomy, avoid attempting primary wound closure over the socket. Using PRF membranes or a collagen sponge to cover the graft allows for successful healing without repositioning the muco-gingival junction or displacing keratinized mucosa, both of which are common side effects of flap elevation .