Biomechanical Analysis of the Distal Metaphyseal Ulnar Shortening Osteotomy

Greenberg, Jeffrey A.; Werner, Frederick W.; Smith, Jared M.

doi:10.1016/j.jhsa.2013.06.038

Cited by 25 publications

(41 citation statements)

References 23 publications

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“…However, we believe they are higher than the average value seen in this study (7.5 N). The fact that our average value was higher than other previously reported values using invasive techniques (range, 0.1 N–3.2 N) 8,13,14 supports the theory that dissecting the supporting soft tissues around the DRUJ results in a decrease in JRF. We believe our technique may allow for a more accurate assessment of DRUJ JRF in cadaver models and could offer a valuable method of assessing how various interventions or pathologies affect DRUJ JRF.…”

Section: Discussionsupporting

confidence: 77%

“…Nishiwaki et al 8 also measured force across the DRUJ using a thin malleable pressure sensor and found an average DRUJ resting JRF of 0.1 N. This is markedly lower than values found in the current study and those by Greenberg et al 13 and Gordon et al 14 In order to insert the sensors, Nishiwaki et al 8 removed the capsule of the DRUJ and the distal membranous portions of the interosseous membrane; this may explain why their finding was so much lower than others.…”

Section: Discussioncontrasting

confidence: 68%

“…The average JRF measured in this study was 7.5 N. Greenberg et al 13 measured DRUJ JRF using load cells and reported an average DRUJ JRF of 3.2 N at rest. This value is lower than that which we found.…”

Section: Discussionsupporting

confidence: 47%

“…7–11,13,14,28 However, prior methods have all involved major disruptions of periarticular soft tissues, which likely altered normal joint mechanics. In addition, methods that involve capsulotomy for sensor insertion result in loss of negative intra-articular pressure and its stabilizing suction effect.…”

Section: Discussionmentioning

confidence: 99%

“…The periarticuar soft tissue dissection required in these studies altered the normal mechanics of the DRUJ. 13,14 …”

mentioning

confidence: 99%

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A Nondestructive, Reproducible Method of Measuring Joint Reaction Force at the Distal Radioulnar Joint

Canham¹,

Schreck²,

Maqsoodi³

et al. 2015

The Journal of Hand Surgery

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Purpose To develop a nondestructive method of measuring distal radioulnar joint (DRUJ) joint reaction force (JRF) that preserves all periarticular soft tissues and more accurately reflects in vivo conditions. Methods Eight fresh-frozen human cadaveric limbs were obtained. A threaded Steinmann pin was placed in the middle of the lateral side of the distal radius transverse to the DRUJ. A second pin was placed into the middle of the medial side of the distal ulna colinear to the distal radial pin. Specimens were mounted onto a tensile testing machine using a custom fixture. A uniaxial distracting force was applied across the DRUJ while force and displacement were simultaneously measured. Force-displacement curves were generated and a best-fit polynomial was solved to determine JRF. Results All force-displacement curves demonstrated an initial high slope where relatively large forces were required to distract the joint. This ended with an inflection point followed by a linear area with a low slope, where small increases in force generated larger amounts of distraction. Each sample was measured 3 times and there was high reproducibility between repeated measurements. The average baseline DRUJ JRF was 7.5 N (n = 8). Conclusions This study describes a reproducible method of measuring DRUJ reaction forces that preserves all periarticular stabilizing structures. This technique of JRF measurement may also be suited for applications in the small joints of the wrist and hand. Clinical relevance Changes in JRF can alter native joint mechanics and lead to pathology. Reliable methods of measuring these forces are important for determining how pathology and surgical interventions affect joint biomechanics.

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Section: Discussionsupporting

confidence: 77%