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[An Experiment to calculate the theoretical temperature at the drill-cortical bone interface]
Biomedizinische Technik. Biomedical Engineering
|March 1, 1989
Summary
Drilling bone generates significant heat, with drill hole temperatures up to 13°C higher than measured externally. This elevated temperature, especially during water-cooled procedures, risks exceeding critical bone damage thresholds.
Area of Science:
- Biomaterials engineering
- Orthopedic surgery
- Surgical technology
Context:
- Current methods for measuring drilling-induced heat in cortical bone rely on external thermocouple systems.
- These external measurements are often inaccurately equated with the actual drill-cortical bone interface temperature.
- A significant temperature discrepancy exists between the drill site and externally measured temperatures.
Purpose:
- To simulate and quantify the temperature at the drill-cortical bone interface during simulated drilling.
- To compare simulated interface temperatures with temperatures measured by external thermocouple systems.
- To assess the risk of thermal damage to bone tissue during orthopedic and dental procedures.
Summary:
- A Finite Element Method (FEM) simulation was employed to model heat distribution during simulated bone drilling.
- Calculations revealed that drill hole temperatures were approximately 13°C higher than those measured 0.5 mm away from the hole.
- This temperature increase was observed for both dry and water-cooled drilling conditions.
Impact:
- Findings highlight the inadequacy of external temperature measurements for assessing thermal risk during bone drilling.
- Water-cooled drilling, common in dental and orthopedic surgery, may exceed the critical bone damage threshold of 44°C (prolonged) and 50°C (brief).
- Results emphasize the need for improved intraoperative temperature monitoring to prevent bone necrosis and ensure patient safety.