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Ridge Augmentation Using Customized Allogenic Bone Blocks: Proof of Concept and Histological Findings

Schlee, Markus DDS*; Rothamel, Daniel MD, DMD, PhD

doi: 10.1097/ID.0b013e3182885fa1
Clinical Science and Techniques

Aim: To evaluate handling and healing patterns of customized allogenic bone blocks for vertical and horizontal alveolar defect augmentation.

Materials and Methods: In 2 patients, 3 combined horizontal and vertical post-foraminal mandibular defects were grafted using computer-aided design (CAD) trimmed individual block grafts, 3D-designed on preoperative computed tomography scans. After a healing period of 6 months, graft resorption was measured and bone trephines were taken in progress of implant bed preparation. Four months later, implants were restored with single crowns. Moreover, clinical and radiological implant parameters were assessed 6 and 12 months after restorative rehabilitation.

Results: Uneventful healing was observed in 2 of the 3 cases. A partial exposure of 1 block after 8 weeks could be successfully treated by block reduction and application of a soft tissue graft. Histological evaluation revealed predictable bone formation within all augmented areas, and both patient satisfaction and long-term stability parameters were considered excellent.

Conclusions: It was concluded that the application of individual CAD allografts supports bone formation at deficient sites with reduced patient morbidity, decreased surgery time, and high patient acceptance.

*Private practice, Forchheim, Germany and Department of Oral Surgery, Goethe University, Frankfurt, Germany.

Resident, Department of Oral and Maxillofacial Plastic Surgery, University of Cologne, Cologne, Germany.

Reprint requests and correspondence to: Markus Schlee, DMD, Bayreuther Strasse 39, 91301 Forchheim, Germany, Phone: +49 9191 341500, Fax: +49 9191 3415010, E-mail:

© 2013 by Lippincott Williams & Wilkins, Inc.