Effect of Push-Up Position on Wrist Joint Pressures in the Intact Wrist and Following Scapholunate Interosseous Ligament Sectioning

Daly, Brett T.; Werner, Frederick W.; Cavallaro, Salvatore M.; Tucci, Emily R.; Harley, Brian J.

doi:10.1016/j.jhsa.2017.10.019

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…13 14 22 The authors reported a significant increase in peak contact pressures in both the radioscaphoid and radiolunate fossae, but significant changes in mean contact pressure only in the radioscaphoid fossa (0.38–0.48 MPA). Additionally, in contrast to the findings reported by Daly et al and Blevens et al, which reported a shift in area from the scaphoid to the lunate fossa, the contact area was significantly increased in the radioscaphoid but not the radiolunate fossa in the study by Johnson et al 11 12 Prior literature, including these studies, on the biomechanics of the radiocarpal joint after SLIL sectioning suggests that changes may occur; however, the specifics of these changes, including magnitude and direction, are mixed.…”

Section: Discussioncontrasting

confidence: 92%

“…These findings are in contrast to a recent study by Daly et al that investigated contact pressure after SLIL injury when axial pressure is applied with the hand in either a knuckle or a push-up position. 11 The authors reported a significant increase in peak contact pressure in only the radioscaphoid fossa in a simulated push-up, while an increase in peak contact pressure in the radiolunate fossa was demonstrated in the knuckle position, the same position used in our study, after SLIL sectioning. In contrast to these findings, we did not observe a significant increase in peak pressure in the radiolunate fossa after SLIL sectioning.…”

Section: Discussionsupporting

confidence: 50%

“…Prior studies have investigated pressure changes of this SLIL deficient state; however, these cadaveric studies have reported heterogenous results, making our understanding of the effect of SLIL injury on wrist contact pressures equivocal. [11][12][13][14] The purpose of this study was to clarify the effect of an SLIL tear on radiocarpal joint contact pressures, using the most technologically advanced pressure system, Tekscan. Specifically, the goal of this paper was to investigate contact pressure and contact area changes in the radiolunate and radioscaphoid fossae after SLIL sectioning.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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Radiocarpal Contact Pressures Are Not Altered after Scapholunate Ligament Tears

et al. 2021

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Background The scapholunate interosseous ligament (SLIL) couples the scaphoid and lunate, preventing motion and instability. Prior studies suggest that damage to the SLIL may significantly alter contact pressures of the radiocarpal joint. Questions/Purposes The purpose of this study was to investigate the contact pressure and contact area in the scaphoid and lunate fossae of the radius prior to and after sectioning the SLIL. Methods Ten cadaveric forearms were dissected distal to 1-cm proximal to the radiocarpal joint and a Tekscan sensor was placed in the radiocarpal joint. The potted specimen was mounted and an axial load of 200 N was applied over 60 seconds. Results Sectioning of the SLIL did neither significantly alter mean contact pressure at the lunate fossa (p = 0.842) nor scaphoid fossa (p = 0.760). Peak pressures were similar between both states at the lunate and scaphoid fossae (p = 0.301–0.959). Contact areas were similar at the lunate fossa (p = 0.508) but trended toward an increase in the SLIL sectioned state in the scaphoid fossa (p = 0.055). No significant differences in the distribution of contact pressure (p = 0.799), peak pressure (p = 0.445), and contact area (p = 0.203) between the scaphoid and lunate fossae after sectioning were observed. Conclusion Complete sectioning of the SLIL in isolation may not be sufficient to alter the contact pressures of the wrist. Clinical Relevance Injury to the secondary stabilizers of the SL joint, in addition to complete sectioning of the SLIL, may be needed to induce altered biomechanics and ultimately degenerative changes of the radiocarpal joint.

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