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首页> 外文期刊>The Journal of Prosthetic Dentistry >Modeling of jaw biomechanics in the reconstructed mandibulectomy patient.
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Modeling of jaw biomechanics in the reconstructed mandibulectomy patient.

机译：重建下颌骨切除术患者的颌骨生物力学建模。

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STATEMENT OF PROBLEM: Biomechanics of occlusal force and indirect calculation of temporomandibular joint loading in patients after surgery for head and neck cancer is poorly understood. PURPOSE: This study compared occlusal force values of 6 mandibulectomy subjects with reconstructed mandibles to 6 noncancer subjects with intact mandibles and reports occlusal force predictions from a developed computer model simulation of both a mandibulectomy subject with a reconstructed mandible and noncancer subject with an intact mandible. MATERIAL AND METHODS: Maximum occlusal force was recorded at the first molar and incisal edge in 6 mandibulectomy subjects who had bony reconstruction of the mandible and 6 noncancer subjects with an intact mandible. Clinical data were then qualitatively compared with occlusal force values generated from an existing computer model simulating an average adult, and a developed model simulating an average mandibulectomy subject who had bony reconstruction of the mandible. The biomechanical parameters modeled also included an estimation of joint force magnitude and direction when biting with maximal force on the first molar. RESULTS: Clinical data revealed no significant differences in occlusal force between the 6 mandibulectomy subjects with bony reconstruction of the mandible and 6 noncancer subjects with an intact mandible; however, average molar and incisal occlusal force values were 22% and 32% less in mandibulectomy subjects with bony reconstruction. Computer simulations of a reconstructed mandibulectomy subject predicted that reconstructed subjects would have 45% less molar occlusal force, 50% less incisal occlusal force, and a higher joint/tooth force ratio compared with a simulated noncancer patient with an intact mandible. CONCLUSIONS: There were no significant differences in first molar or incisal occlusal force between reconstructed mandibulectomy subjects and noncancer subjects with intact mandibles. Trends calculated from computer simulations were consistent with clinical findings.
机译：问题陈述：对头颈部癌术后患者的咬合力生物力学和颞下颌关节负荷的间接计算了解甚少。目的：本研究比较了6名具有重建下颌骨的下颌骨切除术受试者与6个完整的下颌骨非癌受试者的咬合力值，并报告了从发达的计算机模型模拟中对具有重建的下颌骨的下颌骨切除术受试者和具有完整的下颌骨的非癌受试者进行的咬合力预测。材料与方法：在6例下颌骨骨重建的下颌骨切除术受试者和6例下颌骨完整的非癌受试者中，在第一磨牙和切缘边缘记录了最大咬合力。然后，将临床数据与从模拟普通成年人的现有计算机模型和模拟患有下颌骨骨重建的普通下颌切除术受试者的发达模型产生的咬合力值进行定性比较。建模的生物力学参数还包括以最大力​​咬合第一臼齿时关节力大小和方向的估算。结果：临床数据显示，在6例下颌骨骨重建的下颌骨切除术患者和6例下颌骨完整的非癌患者之间，咬合力无显着差异。然而，在进行骨重建的下颌切除术患者中，平均磨牙和切牙咬合力值分别降低了22％和32％。对重建的下颌骨切除对象的计算机模拟预测，与模拟的下颌骨完整的非癌患者相比，重建的对象的摩尔咬合力降低了45％，切牙咬合力降低了50％，关节/牙齿力比更高。结论：重建的下颌骨切除术受试者与下颌骨完整的非癌受试者之间的第一磨牙或切牙咬合力无显着差异。通过计算机模拟计算得出的趋势与临床发现一致。

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