Volume 12, Issue 4 pp. 289-296

Bone Structure Changes in Iliac Crest Grafts Combined with Implants

Jan Willem Verhoeven MD, DDS, PhD

Corresponding Author

Jan Willem Verhoeven MD, DDS, PhD

Associate professor, Department of Oral & Maxillofacial Surgery, Prosthodontics and Special Dental Care, University Medical Center, Utrecht, The Netherlands, and Department of Oral & Maxillofacial Surgery, Prosthodontics and Special Dental Care, Jeroen Bosch Hospital, Den Bosch, The Netherlands;

Dr. Jan Willem Verhoeven, Department of Oral & Maxillofacial Surgery, Prosthodontics and Special Dental Care, University Medical Center Utrecht, Stratenum Building, STR.4.115, P.O. Box 85.060, 3508 AB Utrecht, The Netherlands; e-mail: [email protected]Search for more papers by this author
Jan M. Ruijter PhD

Jan M. Ruijter PhD

associate professor, Department of Anatomy and Embryology, Academic Medical Center, Amsterdam, The Netherlands;

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Ronald Koole MD, DDS, PhD

Ronald Koole MD, DDS, PhD

professor, Department of Oral & Maxillofacial Surgery, Prosthodontics and Special Dental Care, University Medical Center, Utrecht, The Netherlands;

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Cornelis De Putter DDS, PhD

Cornelis De Putter DDS, PhD

professor, Department of Oral & Maxillofacial Surgery, Prosthodontics and Special Dental Care, University Medical Center, Utrecht, The Netherlands;

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Marco S. Cune DDS, PhD

Marco S. Cune DDS, PhD

associate professor, Department of Oral & Maxillofacial Surgery, Prosthodontics and Special Dental Care, St. Antonius Hospital, Nieuwegein, The Netherlands

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First published: 05 November 2010
Citations: 8

ABSTRACT

Background: Remodeling of onlay grafts combined with implants to the mandible results in predictable changes in the graft's radiographic density. We studied the relationship between changes in radiographic density and trabecular structure during the first year after onlay grafting with simultaneous implant placement to the mandible.

Purpose: The aim of this study was to evaluate changes in bone structure after onlay grafting.

Materials and Methods: Standardized extraoral radiographs were taken regularly of 16 mandibular sides. Bone structure was measured using the Carl Zeiss Vision KS 400 3.0 imaging system. The parameters studied were trabecular area and perimeter, cavity area and perimeter, end points, branching points, skeleton length, branch angle and direction, and texture.

Results: No differences were found between measurements ventrally versus dorsally of the implant, nor close to versus away from the implant. Early cortical changes suggest partial resorption and formation of a more complex structure. In the fourth quarter after surgery, progressive resorption is seen in the graft's upper cortex. In the graft's upper spongiosa, most parameters indicate bone formation during the first postoperative year. Loading-induced structure changes could not yet be found.

Conclusion: The technique can be used to study changes in the architecture of bone grafts. Changes found in the graft's architecture are in accordance with changes in bone density.

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