Augmented mandibular bone structurally adapts to functional loading |
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Authors: | JW Verhoeven JM Ruijter R Koole C de Putter M Terlou MS Cune |
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Institution: | 1. Department of Oral and Cranio-Maxillofacial Surgery, Prosthodontics and Special Dental Care, University Medical Centre, Utrecht, The Netherlands;2. Department of Anatomy, Embryology and Physiology, Academic Medical Centre, Amsterdam, The Netherlands;3. Department of Image Processing, Faculty of Biology, Utrecht University, Utrecht, The Netherlands;4. Department of Fixed and Removable Prosthodontics, Academic Centre for Dentistry and Oral Hygiene, University Medical Centre Groningen, The University of Groningen, Groningen, The Netherlands |
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Abstract: | Long-term changes in trabecular bone structure during the 10 years following onlay grafting with simultaneous mandibular implant placement were studied. Extraoral radiographs of both mandibular sides in eight patients were taken regularly. Bone structure was analysed using a custom-written image analysis program. Parameters studied were trabecular area and perimeter and marrow cavity area and perimeter. After skeletonisation of the trabecular network, the number of end points and branching points, skeleton length, and branch angle were determined. The observed structural changes agree with the development of a more complex and more delicate or fine osseous structure. The bone shows more trabecular branching. All changes are most pronounced in the graft spongiosa, but are also found in the graft cortex and in the original mandible. The mean trabecular branch angle becomes more horizontal. The applied technique can be used to analyse long-term changes in the architecture of bone grafts. Changes found in the graft architecture correspond to changes expected after functional adaptation to loading. |
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Keywords: | mandible dental implant bone graft bone structure radiology augmentation |
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