Biomechanical Properties of the Human Soft Palate
Biomechanical Properties of the Human Soft Palate
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DOI：
10.1597/08-012.1
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发表时间：
2009-05-01
期刊：
影响因子：
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通讯作者：
Srodon, P. D.
中科院分区：
文献类型：
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作者：
Birch, M. J.;Srodon, P. D.
目的：测量人体软腭的生物力学特性及其在不同解剖部位的变化。设计图：人体组织的离体分析：患者/参与者：从10具正常成人尸体上采集的10个腭（年龄范围，37至90岁）。干预：在37摄氏度的生理盐水中测试计算机控制的单轴应力松弛机械性能。主要结果测量：测量杨氏模量、泊松比，并通过将约化松弛函数曲线拟合到数据来确定粘弹性常数C、tau（1）和tau（2）。结果：从代表10个解剖区的10个腭测试100个切片。后游离缘的平均杨氏模量范围为585 Pa，附着区为1409 Pa。上下方向的平均泊松比为0.45（SD 0.26），横向为0.30（SD 0.21）。1 mm延伸段的平均粘弹性常数为C = -0.1056（+/- 0.1303），τ（1）= 11.0369（+/- 9.1865）秒，τ（2）= 0.2128（+/- 0.0792）秒，对于2 mm延伸长度，C = -0.1111（+/- 0.1466），τ（1）= 14.3725（+/- 5.2701）秒，τ（2）= 0.2094（+/-0.0544）秒。结论：结果显示与作者估计的杨氏模量值一致（Ettema和Kuehn，1994; Berry等人，1999）进行腭的有限元建模。然而，基于闭合压力的其他模量测量是相当不同的。腭部粘弹性参数的空间分布具有良好的一致性。
Objective: To measure biomechanical properties of the human soft palate and the variation across anatomic regions. Design: Ex vivo analysis of human tissue.Patients/participants: Ten palates harvested from 10 normal adult human cadavers (age range, 37 to 90 years).Interventions: Computer-controlled uniaxial stress-relaxation mechanical properties tested in physiological saline at 37 degrees C.Main Outcome Measures: Measurement of Young modulus, Poisson ratio, and determination of viscoelastic constants C, tau(1), and tau(2) by curve-fitting of the reduced relaxation function to the data.Results: One hundred sections were tested from the 10 palates, representative of 10 anatomic zones. The mean Young modulus range was 585 Pa at the posterior free edge to 1409 Pa at regions of attachment. The mean Poisson ratio in the inferior-superior direction was 0.45 (SD 0.26) and in the lateral direction, was 0.30 (SD 0.21). The mean viscoelastic constants for 1-mm extensions were C = -0.1056 (+/- 0.1303), tau(1) = 11.0369 (+/- 9.1865) seconds, and tau(2) = 0.2128 (+/- 0.0792) seconds, and for 2-mm extensions were C = -0.1111 (+/- 0.1466), tau(1) = 14.3725 (+/- 5.2701) seconds, and tau(2) = 0.2094 (+/- 0.0544) seconds.Conclusions: The results show agreement with values of the Young modulus estimated by authors (Ettema and Kuehn, 1994; Berry et al., 1999) undertaking finite element modeling of the palate. However, other modulus measurements based on closing pressure are considerably different. The spatial distribution of viscoelastic parameters across the palate shows good consistency.