The Clinical Challenge: Reconstructing After Implant Failure

When dental implants fail, their removal inevitably results in significant osseous and soft tissue defects. The challenge is amplified when multiple adjacent implants are lost, leading to substantial volumetric collapse. Traditional reconstruction often involves barrier membranes and staged grafting with coronal flap advancement, which frequently results in a loss of vestibular depth and the need for secondary surgeries to restore the mucogingival architecture. Achieving primary wound closure over an immediate graft in these sites is notoriously difficult and carries a high risk of dehiscence.

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Key Methodology & Insights (The CTBG Protocol)

The Composite Tuberosity Bone Graft (CTBG) provides a unique biological solution by harvesting a single piece of tissue containing bone, periosteum, connective tissue, and epithelium:

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• Comprehensive Harvest: The graft is harvested from the maxillary tuberosity, providing structural cortical support and a cancellous core with high osteogenic and osteoinductive potential.
• Dual-Functionality: The bony portion addresses the ridge defect, while the attached connective tissue and epithelium reconstruct the damaged buccal soft tissue and seal the site.
• Healing by Secondary Intention: By leaving the soft tissue portion of the graft exposed and sutured to the recipient gingiva, the need for aggressive flap mobilization is eliminated.
• Vestibular Maintenance: This approach avoids the reduction of vestibular depth typically seen with coronal advancement, actually increasing the amount of keratinized gingiva during healing.
• Versatile Application: The CTBG can be utilized as an inlay graft (wedged between bony borders) or an onlay graft (fixed buccally with screws) depending on the defect morphology.
• Hardware Retrieval: Failed fixtures are retrieved using a counter-torque ratchet system followed by thorough debridement before graft insertion.

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"For patients with sufficient tuberosity bone volume, using a one-piece composite tuberosity bone graft appears to be a promising approach for rebuilding the ridge in a single surgery."

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From Research to Practice

This "rescue" protocol proves that the maxillary tuberosity is a biological goldmine for complex reconstructions. By mastering the one-piece harvest technique, clinicians can drastically reduce surgical morbidity and treatment time for patients facing the trauma of implant failure. These advanced autologous strategies are a signature of the MAXI Hybrid course, where we equip surgeons with the skills to manage the most difficult complications using the patient's own biological resources.

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Expert Tip: Protection of the grafted area is critical during the initial healing phase. Always provide the patient with a fixed provisional prosthesis that avoids any pressure on the CTBG. This ensures that the soft tissue portion can heal undisturbed by secondary intention, which is the key to reestablishing a stable, natural-looking vestibular depth