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Feichtinger, M; Mossböck, R; Kärcher, H.
Evaluation of bone volume following bone grafting in patients with unilateral clefts of lip, alveolus and palate using a CT-guided three-dimensional navigation system.
J Craniomaxillofac Surg. 2006; 34(3):144-149 Doi: 10.1016/j.jcms.2005.11.005
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Leading authors Med Uni Graz: Feichtinger Matthias
Co-authors Med Uni Graz: Kärcher Hans; Mossboeck Rudolf
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Abstract:: PURPOSE: In cleft patients the eruption of the permanent canine depends very much on the amount of bone available following bone grafting. The purpose of this study was to evaluate the initial defect in alveolar clefts and the volume of bone bridging found in unilateral clefts which had undergone bone grafting. PATIENTS AND METHODS: To determine the fate of the bone graft in cleft palate patients a three-dimensional CT-based Navigation System (Zeiss, Aalen, Germany) was used. CT scans of 16 patients with unilateral clefts were taken immediately preoperatively and 1 year postoperatively. The patients underwent surgery between the age of 9 and 14 years using iliac crest bone grafts. The data was transferred to the work station of the navigation system. Using the STN software, the defect at the alveolar clefts and volume of the bone grafts were determined in each case. Three-dimensional models were created showing the amount of bone immediately preoperatively and 1 year postoperatively. RESULTS: The size of the cleft defect did not correlate with the success rate of the alveolar bone grafting. The form of the transplant remained almost constant when the permanent canine erupted spontaneously into the graft. In cases of absence of the permanent tooth or when the permanent canine required orthodontic treatment, significant bone loss could be observed in the buccopalatal direction. CONCLUSION: Three-dimensional reconstruction of bone grafts using a navigation system enables a valuable objective assessment of graft volume. Bone formation can be assessed in all three dimensions showing a high grade of resorption in patients lacking physiological load.
Find related publications in this database (using NLM MeSH Indexing): Adolescent -; Alveolar Process - anatomy and histologyAlveolar Process - radiography; Bone Transplantation - methodsBone Transplantation - radiography; Child -; Cleft Lip - surgery; Cleft Palate - radiographyCleft Palate - surgery; Cuspid -; Female -; Humans -; Ilium - transplantation; Image Processing, Computer-Assisted - methods; Incisor -; Male -; Prospective Studies -; Tomography, X-Ray Computed - methods; Tooth Eruption - physiology; Treatment Outcome -
Find related publications in this database (Keywords): alveolar bone grafting; radiographic assessment; navigation system