Computer-Guided CO2-Laser Osteotomy of the Sheep Tibia: Technical Prerequisites and First Results
| Autor: | Martin Werner, Stefan Stübinger, Peter Hering, Mikhail Ivanenko, Brigitte von Rechenberg, Hans-Florian Zeilhofer, Johannes Kuttenberger, Robert Sader, Manfred Klasing, Alessa Waibel |
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| Rok vydání: | 2008 |
| Předmět: |
medicine.medical_specialty
Laser cutting Radiography medicine.medical_treatment Biomedical Engineering Bone healing Osteotomy Tissue Culture Techniques medicine Animals Radiology Nuclear Medicine and imaging Tibia Fracture Healing Orthodontics Sheep Co2 laser business.industry Surgery Surgery Computer-Assisted Lasers Gas Feasibility Studies Osteotome Thermal damage Laser Therapy business |
| Zdroj: | Photomedicine and Laser Surgery. 26:129-136 |
| ISSN: | 1557-8550 1549-5418 |
| Popis: | OBJECTIVE: The purpose of this study was to examine for the first time the feasibility of performing complete osteotomy of sheep tibia using a computer-guided CO2-laser osteotome, and to examine bone healing under functional loading. BACKGROUND DATA: Bone cutting without aggravating thermal side effects has been demonstrated with scanning CO2-laser osteotomy. Further research is necessary to develop a clinically usable laser osteotome, which may allow new types of bone surgical procedures. MATERIALS AND METHODS: The scanning parameters for performing tibial osteotomies were determined in preliminary ex vivo trials. Osteotomies were performed in the mid-diaphysis of sheep tibia using either the prototype laser osteotome (osteoLAS, study group; n = 12), or an oscillating saw (control group; n = 12). Both groups were divided into two subgroups each (n = 6), and the two groups were sacrificed after 4 and 12 wk. Radiographs were taken postoperatively and after 4, 8, and 12 wk to compare the course of bone healing. RESULTS: Laser osteotomies of sheep tibia up to a depth of 20 mm were possible without visible thermal damage to the bone. A sequential PC-controlled cut geometry with artificial widening of the osteotomy gap was required for a complete osteotomy. Both clinically and radiologically, the laser and control groups showed undisturbed primary gap healing. Bone healing was similar and undelayed after both laser osteotomy and osteotomy done by mechanical saw. CONCLUSIONS: Osteotomy of multi-layered bones with a scanning CO2-laser demonstrates clinical and radiological healing patterns comparable to those seen with osteotomy done by standard mechanical instruments. It is, however, a technically demanding procedure, and complete laser osteotomies of long bones are only reasonable in bones with a diameter |
| Databáze: | OpenAIRE |
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