Regional mechanical properties of the long head of the biceps tendon

Kolz, Christopher W.; Suter, Thomas; Henninger, Heath B.

doi:10.1016/j.clinbiomech.2015.07.005

Cited by 18 publications

(6 citation statements)

References 38 publications

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“…This indicated that OSPBT may be the optimal method of tenodesis for the complete removal of all hidden biceps lesions and for the revision of failed postoperative LHB lesions (27). Kolz et al (28) compared the mechanical properties between OSPBT and ASPBT, and indicated that LHB in the suprapectoral region tended to have higher tensile strength than in the subpectoral region, and LHB tenodesis in the suprapectoral region could withstand higher failure loads and become more arthroscopically accessible. Furthermore, this present study found that the incidences of postoperative stiffness and bicipital groove tenderness in the ASPBT group were significantly higher than those in the OSPBT group.…”

Section: Discussionmentioning

confidence: 99%

Open subpectoral vs. arthroscopic proximal biceps tenodesis: A comparison study of clinical outcomes

Tang

Guo

2019

Exp Ther Med

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The purpose of the present study was to compare the results of open subpectoral biceps tenodesis and arthroscopic proximal biceps tenodesis for treating long head of biceps (LHB) lesions. From January 2015 to June 2016, a total of 259 patients underwent LHB tenodesis surgery. Among them, 117 patients (60 females and 57 males) who met the inclusion and exclusion criteria were enrolled into the present study and were randomly divided into two groups, including an open subpectoral tenodesis group (OSPBT; n=62) and an arthroscopic proximal tenodesis group (ASPBT; n=55). All patients were followed up for at least 12 months. The demographic characteristics of each patient were recorded in detail. Moreover, clinical examinations of LHB lesions, such as shoulder range of motion (ROM), Visual Analog Scale (VAS) scores (0, no pain, to 10, most severe pain), American Shoulder and Elbow Surgeons (ASES) scores, and Constant-Murley shoulder outcome scores, were investigated prior to surgery, as well as 3, 6 and 12 months after surgery. Postoperative complications were also comprehensively investigated. There were no significant differences in sex, body mass index, dominant shoulder, duration of pain, injury type and operation time between the groups. The mean length of hospital stay in the ASPBT group was significantly lower than that of the OSPBT group (5.4±1.8 days vs. 9.3±2.9 days; P<0.05). The clinical outcomes, including shoulder ROMs, VAS scores, ASES scores and Constant-Murley shoulder outcome scores, were significantly improved after either OSPBT or ASPBT treatment. Specifically, the VAS score, incidence of postoperative stiffness and bicipital groove tenderness in the OSPBT group were significantly lower than those in the ASPBT group at 3 months post-surgery (P<0.05). Additionally, there were no significant difference in the improvement of other clinical outcomes and postoperative complications between the two groups. ASPBT and OSPBT were both effective and safe techniques for treating LHB lesions. However, tenderness of the bicipital groove was more common in the early stages of recovery post-surgery in the ASPBT group, which may be related to tendinitis of the LHB in the bicipital groove.

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Section: Discussionmentioning

confidence: 99%

Open subpectoral vs. arthroscopic proximal biceps tenodesis: A comparison study of clinical outcomes

Tang

Guo

2019

Exp Ther Med

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“…American Society for Testing and Materials guidelines for testing the strength of materials suggest using dog-bone shaped specimens to ensure that failure occurs away from the testing grips (i.e., midlength failure) [18,19]. Rectangular and dog-bone shaped specimens have been successful in evaluating failure mechanics of tendons and ligaments, where collagen fibers are aligned along the loading direction [20][21][22]. However, materials with fibers oriented off-axis from the applied loading direction, such as AF (fiber orientation range ¼ 30-45 deg), often fail unpredictably, even with a dogbone shaped geometry [11,16,23].…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Repeatable Failure Testing of Annulus Fibrosus

Werbner

Zhou

O’Connell

2017

Journal of Biomechanical Engineering

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Tears in the annulus fibrosus (AF) of the intervertebral disk can result in disk herniation and progressive degeneration. Understanding AF failure mechanics is important as research moves toward developing biological repair strategies for herniated disks. Unfortunately, failure mechanics of fiber-reinforced tissues, particularly tissues with fibers oriented off-axis from the applied load, is not well understood, partly due to the high variability in reported mechanical properties and a lack of standard techniques ensuring repeatable failure behavior. Therefore, the objective of this study was to investigate the effectiveness of midlength (ML) notch geometries in producing repeatable and consistent tissue failure within the gauge region of AF mechanical test specimens. Finite element models (FEMs) representing several notch geometries were created to predict the location of bulk tissue failure using a local strain-based criterion. FEM results were validated by experimentally testing a subset of the modeled specimen geometries. Mechanical testing data agreed with model predictions (∼90% agreement), validating the model's predictive power. Two of the modified dog-bone geometries ("half" and "quarter") effectively ensured tissue failure at the ML for specimens oriented along the circumferential-radial and circumferential-axial directions. The variance of measured mechanical properties was significantly lower for notched samples that failed at the ML, suggesting that ML notch geometries result in more consistent and reliable data. In addition, the approach developed in this study provides a framework for evaluating failure properties of other fiber-reinforced tissues, such as tendons and meniscus.

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“…On the tissue level, tendons have been tested in vitro under multiaxial loading conditions (i.e., tension, compression, shear) and their mechanical properties have been shown to vary between individuals, across different anatomical locations, and even within specific regions . For example, our work has shown that the distal region of bovine DDFT exhibited greater shear and compressive stresses than the corresponding proximal region .…”

Section: Contribution Of Tendon Structure To Mechanicsmentioning

confidence: 85%

Experimental evaluation of multiscale tendon mechanics

Fang

Lake

2017

J. Orthop. Res.

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Tendon's primary function is a mechanical link between muscle and bone. The hierarchical structure of tendon and specific compositional constituents are believed to be critical for proper mechanical function. With increased appreciation for tendon importance and the development of various technological advances, this review paper summarizes recent experimental approaches that have been used to study multiscale tendon mechanics, includes an overview of studies that have evaluated the role of specific tissue constituents, and also proposes challenges/opportunities facing tendon study. Tendon has been demonstrated to have specific structural characteristics (e.g., multi-level hierarchy, crimp pattern, helix) and complex mechanical properties (e.g., non-linearity, anisotropy, viscoelasticity). Physical mechanisms including uncrimping, fiber sliding, and collagen reorganization have been shown to govern tendon mechanical responses under both static and dynamic loading. Several tendon constituents with relatively small quantities have been suggested to play a role in its mechanics, although some results are conflicting. Further research should be performed to understand the interplay and communication of tendon mechanical properties across levels of the hierarchical structure, and further show how each of these components contribute to tendon mechanics. The studies summarized and discussed in this review have helped elucidate important aspects of multiscale tendon mechanics, which is a prerequisite for analyzing stress/strain transfer between multiple scales and identifying key principles of mechanotransduction. This information could further facilitate interpreting the functional diversity of tendons from different species, different locations, and even different developmental stages, and then better understand and identify fundamental concepts related to tendon degeneration, disease, and healing. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:1353-1365, 2017.

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Regional mechanical properties of the long head of the biceps tendon

Cited by 18 publications

References 38 publications

Open subpectoral vs. arthroscopic proximal biceps tenodesis: A comparison study of clinical outcomes

Open subpectoral vs. arthroscopic proximal biceps tenodesis: A comparison study of clinical outcomes

A Novel Method for Repeatable Failure Testing of Annulus Fibrosus

Experimental evaluation of multiscale tendon mechanics

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