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Relevant bibliographies by topics / Scapholunate ligament

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Academic literature on the topic 'Scapholunate ligament'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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Journal articles on the topic "Scapholunate ligament"

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Shahabpour, Maryam, Wiem Abid, Luc Van Overstraeten, Kjell Van Royen, and Michel De Maeseneer. "Extrinsic and Intrinsic Ligaments of the Wrist." Seminars in Musculoskeletal Radiology 25, no. 02 (April 2021): 311–28. http://dx.doi.org/10.1055/s-0041-1731653.

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AbstractCarpal stability depends on the integrity of both intra-articular and intracapsular carpal ligaments. In this review, the role of the radial-sided and ulnar-sided extrinsic and intrinsic ligaments is described, as well as their advanced imaging using magnetic resonance arthrography (MRA) and contrast-enhanced magnetic resonance imaging (MRI) with three-dimensional (3D) scapholunate complex sequences and thin slices. In the last decade, the new concept of a so-called “scapholunate complex” has emerged among hand surgeons, just as the triangular ligament became known as the triangular fibrocartilage complex (TFCC).The scapholunate ligament complex comprises the intrinsic scapholunate (SL), the extrinsic palmar radiocarpal: radioscaphocapitate (RSC), long radiolunate (LRL), short radiolunate (SRL) ligaments, the extrinsic dorsal radiocarpal (DRC) ligament, the dorsal intercarpal (DIC) ligament, as well as the dorsal capsular scapholunate septum (DCSS), a more recently described anatomical structure, and the intrinsic palmar midcarpal scaphotrapeziotrapezoid (STT) ligament complex. The scapholunate (SL) ligament complex is one of the most involved in wrist injuries. Its stability depends on primary (SL ligament) and secondary (RSC, DRC, DIC, STT ligaments) stabilizers.The gold standard for carpal ligament assessment is still diagnostic arthroscopy for many hand surgeons. To avoid surgery as a diagnostic procedure, advanced MRI is needed to detect associated lesions (sprains, midsubstance tears, avulsions and chronic fibrous infiltrations) of the extrinsic, midcarpal and intrinsic wrist ligaments, which are demonstrated in this article using 3D and two-dimensional sequences with thin slices (0.4 and 2 mm thick, respectively).

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Mathoulin, Christophe. "From Scapholunate Interosseus Ligament to Scapholunate Ligament Complex." Journal of Wrist Surgery 02, no. 02 (May 21, 2013): 098. http://dx.doi.org/10.1055/s-0033-1341961.

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Garcia-Elias, M., X. Alomar Serrallach, and J. Monill Serra. "Dart-throwing motion in patients with scapholunate instability: a dynamic four-dimensional computed tomography study." Journal of Hand Surgery (European Volume) 39, no. 4 (April 8, 2013): 346–52. http://dx.doi.org/10.1177/1753193413484630.

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When the normal wrist rotates along the ‘dart-throwing’ plane, the proximal row remains still, with most motion occurring at the midcarpal joint. Whether this behaviour is maintained when the scapholunate ligaments are torn is not known. If this is the case, patients having a scapholunate ligament repair could benefit from early dart-throwing exercises without the risk of pulling the sutures apart. Using dynamic computer tomography, we analysed the carpal behaviour of six normal wrists and six wrists with scapholunate instability during dart-throwing motion. In the normal wrists, the scaphoid and lunate did not flex or extend, but translated along the frontal plane an average 5.9 and 5.6 mm, respectively. When the scapholunate ligaments were torn, the scaphoid shifted towards the radial styloid considerably more than the lunate (12.8 mm versus 4.8 mm; p = 0.005), inducing a scapholunate gap. Based on these findings, we cannot recommend dart-throwing exercises after scapholunate ligament repair, unless the joint is stabilized with wires or screws.

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Mathoulin, Christophe, Lorenzo Merlini, and Chihab Taleb. "Scapholunate injuries: challenging existing dogmas in anatomy and surgical techniques." Journal of Hand Surgery (European Volume) 46, no. 1 (September 20, 2020): 5–13. http://dx.doi.org/10.1177/1753193420956319.

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The management of scapholunate injuries and dissociation remains debatable. Traditional methods of fixation had centred around open procedures, but advances in wrist arthroscopic techniques has redefined both major anatomical findings and operative approaches. This article challenges two main existing dogmas: first, the anatomy of the scapholunate ligament and second, the management of these injuries. For the first, we propose that scapholunate stability is in fact maintained by a whole anatomic complex, consisting of well-defined capsuloligamentous structures and extrinsic ligaments, and that the scapholunate ligament itself probably has a limited role. For the second, we challenge the notion that scapholunate injuries often require open procedures and propose that mini-invasive arthroscopic dorsal repair of the scapholunate complex is an efficient technique and sufficient for achieving long-term stability.

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Shershneva, O. G., and I. V. Kirpichev. "Modern approaches to the treatment of scapholunate interosseous ligament injuries (literature review)." Genij Ortopedii 26, no. 4 (December 2020): 593–99. http://dx.doi.org/10.18019/1028-4427-2020-26-4-593-599.

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Introduction The scapholunate interosseous ligament binds the scaphoid and lunate together, and is the primary stabilising ligament between these two bones. Scapholunate injuries lead to chronic instability and degenerative arthritis of the wrist. Scapholunate injuries are graded based on the acuity and the severity of the injury. Purpose The paper is a review of various techniques used to repair or reconstruct the scapholunate ligament according to the clinical manifestations, anatomic and pathologic findings. Methods A review of the literature covering this topic is presented. Results Conservative treatment is primarily indicated in stable and partial ligament tears. Arthroscopic treatment is used when immobilization is unsuccessful. Arthroscopically assisted scapholunate reduction and K-wire fixation is commonly used for acute injuries. Primary repair of scapholunate injuries are performed in all tear types using an open approach. Surgical indications depend on the severity of the instability, time after trauma and the presence of degenerative changes. Acute repair of scapholunate ligament injuries remains the gold standard as an earlier intervention provides better results. Acute injuries to the scapholunate ligament require two-four weeks before surgery. Within this period the ligament is often still repairable itself both with or without supplementary capsulodesis procedures; ligament reconstruction is generally preferable in patients with chronic injures. There are many arthroscopic techniques to treat chronic scapholunate injures such as scapholunate ligament primary repair using various types of capsulodesis, tendon graft reconstruction, bone-ligament-bone procedure, various intercarpal fusions and proximal row carpectomy, total wrist fusion and arthroplasty. Conclusion Early diagnosis and management of scapholunate ligament tears are necessary to preserve wrist functions.

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Taleisnik, Julio. "Scapholunate ligament excision." Journal of Hand Surgery 13, no. 5 (September 1988): 790–91. http://dx.doi.org/10.1016/s0363-5023(88)80153-9.

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Ward, Patrick J., and John R. Fowler. "Scapholunate Ligament Tears." Orthopedic Clinics of North America 46, no. 4 (October 2015): 551–59. http://dx.doi.org/10.1016/j.ocl.2015.06.013.

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Loveridge, Jeremy, Kenneth Cutbush, Greg Couzens, and Mark Ross. "Scapholunate Ligament Reconstruction." Journal of Wrist Surgery 02, no. 02 (May 21, 2013): 110–15. http://dx.doi.org/10.1055/s-0033-1341962.

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Rajan, Prashant V., and Charles S. Day. "Scapholunate Ligament Insufficiency." Journal of Hand Surgery 40, no. 3 (March 2015): 583–85. http://dx.doi.org/10.1016/j.jhsa.2014.10.028.

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Athlani, Lionel, Nicolas Pauchard, and Gilles Dautel. "Radiological evaluation of scapholunate intercarpal ligamentoplasty for chronic scapholunate dissociation in cadavers." Journal of Hand Surgery (European Volume) 43, no. 4 (December 4, 2017): 387–93. http://dx.doi.org/10.1177/1753193417746055.

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We performed a cadaveric study to evaluate radiological performance of a technique for scapholunate intercarpal ligamentoplasty designed for treating reducible scapholunate dissociation. We created scapholunate instability in 12 fresh adult cadaveric forearms by sectioning the dorsal scapholunate interosseous ligament and the dorsal intercarpal ligament. All wrists showed scapholunate diastasis, dorsal intercalated segmental instability and posterior scaphoid subluxation. We performed scapholunate intercarpal ligamentoplasty in six wrists and Garcia-Elias three-ligament tenodesis in another six. Wrists were examined radiographically both after ligament sectioning and after ligamentoplasty to compare static and dynamic scapholunate gaps and scapholunate and capitolunate angles. Improvement was statistically significant in all measurements, reflecting a return to normal values. Posterior scaphoid subluxation was also corrected. There was no significant difference between the two treatment groups. Our findings suggest that ligamentoplasty can restore scapholunate joint stability and normal carpal anatomy.

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Dissertations / Theses on the topic "Scapholunate ligament"

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Johnston, James Duncan. "Mechanical testing of the scapholunate ligament." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2002. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ65628.pdf.

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Rossi, Laetitia. "Contribution à la spécification d'un implant assurant la stabilité et la mobilité des os du carpe dans le cas de la rupture du ligament scapho-lunaire." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM4039.

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Le poignet, complexe articulaire situé entre l'avant-bras et la main, est sujet aux traumatismes. Par exemple, une chute sur le poignet suite à la pratique d'un sport de glisse ou tout simplement dans un accident de la vie quotidienne peut entraîner une lésion du ligament scapho-lunaire. Cette lésion, difficile à diagnostiquer sur une simple radiographie, évolue toujours vers l'arthrose du poignet. Si le diagnostic est fait pendant la phase aigue, proche du traumatisme, la réparation du ligament ou des techniques conservatrices sur parties molles sont possibles. Si la lésion n'est pas détectée à temps, celle-ci engendre une instabilité du carpe évoluant vers l'arthrose.. A ce stade, des techniques plus radicales incluant des arthrodèses partielles ou totales sont bien connues. Cependant, ces techniques de fusion des os engendrent une perte conséquente de mobilité du poignet. L'objectif de la thèse est de définir une méthode de conception et le dimensionnement d'un implant dont le but est de rétablir la cinématique du carpe après une lésion ligamentaire. Ce dispositif devra remplacer la partie dorsale du ligament scapho-lunaire lorsque celui-ci n'est plus réparable et avant apparition de l'arthrose
ScaphoLunate interosseous ligament (SLIL) lesion can occur when falling on an outstretched, pronated hand and lead to carpal instability. If SLIL tears are detected early, the ligament can be repaired. However, if the ligament is left untreated, SLIL instability can evolve into carpal arthritis called ScaphoLunate Advanced Collapse (SLAC). Well-known SLAC treatments include arthrodeses. These techniques modify the carpal kinematics and involve a range of motion (ROM) loss. Different prostheses are proposed for patients with arthritis. However, these prostheses do not make an acceptable compromise between the ROM allowed and their mechanical strength. This thesis presents an implant to replace the dorsal part of SLIL when the ligament is not repairable and before the apparition of SLAC. The implant must restore normal kinematics and the mechanical behavior of the carpus. Each step of its design is presented. Kinematic constraints of the implant were derived from measured bone displacements. Using a 3D best-fit method, their mean values and uncertainties were determined. The mechanical behavior of the implant was defined by SLIL stiffness and elongation. Strain energy of the native ligament was a characteristic relevant to the implant behavior design. Surgical and anatomical constraints lead to a small amount of space availaible; hence, the design was driven by strain energy distribution. Using an material capability index, the choice of suitable material is discussed. Finally, the implant design and its method are presented, which satisfy all previous constraints. FEA of the most critical case of kinematic constraints was performed to validate the proposed implant design

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HIlton, Thomas. "Clinical outcomes following reduction and pinning of lesser arc injuries without repair of the scapholunate interosseous ligament." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20373.

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Study Rationale: Purely ligamentous lesser arc, Mayfield grade 3 and 4, perilunate dislocations (PLD's) are uncommon. Current recommendations are for open reduction and repair of the interosseous ligaments to prevent the development of scapholunate dissociation and degeneration to a scapholunate advance collapse (SLAC) wrist. This study proposes a less invasive treatment method which includes closed reduction and pinning alone without repair of the scapholunate interosseous ligament. We propose that the majority of patients will obtain good function and pain scores and the few that develop instability may still have a reconstruction performed through a naïve surgical field. Methods: Dislocations were reduced anatomically and held with buried k-wires which were removed at 6 weeks with no specific rehabilitation protocol observed. Subjective assessment included MAYO wrist scoring system, wrist range of movement, instability and grip strength testing. Radiological measurements included scapholunate distance, scapholunate angle, radiolunate angle and osteoarthritis. Results: 10 male patients, median age of 35, were followed-up for a median of 22 months. 7 patients underwent a closed reduction and anatomical pinning while 3 underwent open reduction due to unachievable reduction by closed means. All of these patients presented at a median of 14 days after the injury occurred. None of the patients had their scapholunate ligaments repaired or reconstructed. MAYO scores included, 3 excellent scores, 2 good scores and 5 fair scores. Instability was found clinically in 1 asymptomatic patient who had a positive Watson shift test. Radiological scores include a median scapholunate distance of 2mm, a scapholunate angle of 70° and a radiolunate angle of 15°. Osteoarthritis was found in 2 patients, all of whom were asymptomatic. Discussion: Current recommendations in the literature are that PLD's should be reduced via an open surgical technique with repair of the SLIL and percutaneous pinning. However the results of this treatment strategy are not optimal and do not confer uniformly good results. We propose a closed anatomical reduction and percutaneous pinning of the PLD. Our study shows that the majority of patients will demonstrate good function and pain scores when managed this way. A smaller number of these injured wrists will go on to develop instability. However the advantage of our method over the current recommendations is that when this happens the reconstruction of the SLIL will be made easier through a naïve surgical field. Conclusion: We recommend the closed reduction and anatomical pinning of a purely ligamentous lesser arc injury. This treatment strategy yields good results at medium term follow-up and preserves the option for the reconstruction of the scapholunate interosseous ligament should instability develop.

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Darbelley, Laurence Dautel Gilles. "Instabilité scapholunaire dissociative post-traumatique du carpe place de la ligamentoplastie de Peter Weiss /." [S.l] : [s.n], 2004. http://www.scd.uhp-nancy.fr/docnum/SCDMED_T_2004_DARBELLEY_LAURENCE.pdf.

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Handschak, Tino [Verfasser], Mark Sebastian [Gutachter] Lenz, Frank [Gutachter] Siemers, and Michel [Gutachter] Schädel-Höpfner. "Etablierung eines standardisierten Untersuchungsverfahrens zur sonographischen Darstellung und Beurteilung des scapholunären Bandes/Ligamentum scapholunatum / Tino Handschak ; Gutachter: Mark Sebastian Lenz, Frank Siemers, Michel Schädel-Höpfner." Jena : Friedrich-Schiller-Universität Jena, 2019. http://d-nb.info/1207155764/34.

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I-HsienChen and 陳一賢. "Biomechanical Evaluation of Scapholunate Ligament." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/11540379950286490148.

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碩士
國立成功大學
醫學工程研究所碩博士班
98
Scapholunate ligament (SLL) has been known as a major ligament to retain the carpal stability. However, because of its complex geometry, the biomechanical properties of SLL are not clearly understood yet. Even though previous studies have conducted mechanical researches on SLL under different loadings, their focus was on measuring the structure stiffness of SLL. Whereas, the load-displacement curve derived from merely measuring a single point is unable to represent SLL properties under loading. Traditional mechanical measurement is difficult to obtain enough information for evaluating SLL material properties. Therefore, this study aimed to construct an experimental model to evaluate SLL mechanical response by means of digital image correlation (DIC) technology. First, the properties of SLL, obtained from adult canine, were evaluated from traditional approach. Then DIC was applied on one specimen to demonstrate its ability. Also, finite element analysis was employed to compare with the DIC outcome in a linear sense. The loads applied included both tension, loading parallel the SLL fiber direction, and shear, loading vertical to the SLL fiber direction. The results showed that adult canine SLL posses a viscoelastic property and the stiffness and relaxation rate increased as the strain rate increased. However this strain rate effect is limited (2000% vs. 62.84% at most). With the aided of DIC, the displacement distribution on an area region could be obtained. Integrate with digital microscope, DIC method is capable to study the deformation of soft-tissue such as SLL. DIC provides qualitative and quantitative outcome for more detailed analysis in biomaterial. However, based on the experience of this study, better registration is required for finite element simulation to compare with DIC outcome.

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Book chapters on the topic "Scapholunate ligament"

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Messina, Jane C. "Scapholunate Ligament Injuries." In Arthroscopy, 903–11. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49376-2_73.

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Adamthwaite, Jonathan, Sina Babazadeh, and Marc Garcia-Elias. "Scapholunate Ligament Injury." In Sports Injuries of the Hand and Wrist, 201–34. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-02134-4_11.

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Camus, E. "Dorsal Scapholunate Capsulodesis: Viegas’ Technique." In Carpal Ligament Surgery, 235–41. Paris: Springer Paris, 2013. http://dx.doi.org/10.1007/978-2-8178-0379-1_22.

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Garret, J. "Technique of Open Scapholunate Ligament Repair." In Carpal Ligament Surgery, 187–97. Paris: Springer Paris, 2013. http://dx.doi.org/10.1007/978-2-8178-0379-1_18.

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Ross, Mark, William B. Geissler, Jeremy Loveridge, and Gregory Couzens. "Management of Scapholunate Ligament Pathology." In Wrist and Elbow Arthroscopy, 119–37. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4614-1596-1_10.

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Mesplié, Grégory, and Olivier Léger. "Sprains of the Scapholunate Ligament." In Hand and Wrist Rehabilitation, 127–45. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16318-5_4.

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Van Overstraeten, L. "Management of Scapholunate Instabilities Resorting to Blatt’s Capsulodesis." In Carpal Ligament Surgery, 199–203. Paris: Springer Paris, 2013. http://dx.doi.org/10.1007/978-2-8178-0379-1_19.

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Delattre, O., S. Joulie, J. Vogels, C. Alexieva, L. Stratan, and F. Duroux. "The Capsulo-Fibrodesis: Horizontal Proximal Carpal Row Retightening Capsulodesis with Scapholunate ‘Fibrodesis’ – A New Surgical Option for Scapholunate Dissociation." In Carpal Ligament Surgery, 243–50. Paris: Springer Paris, 2013. http://dx.doi.org/10.1007/978-2-8178-0379-1_23.

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Goubau, J., P. Van Hoonacker, B. Berghs, and D. Kerckhove. "Scapholunate Ligament Reconstruction Using a Bone-Ligament-Bone Autograft." In Carpal Ligament Surgery, 261–64. Paris: Springer Paris, 2013. http://dx.doi.org/10.1007/978-2-8178-0379-1_26.

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Dréant, N. "Berger’s Capsulodesis with Dorsal Intercarpal Ligament in Chronic Scapholunate Instability." In Carpal Ligament Surgery, 227–34. Paris: Springer Paris, 2013. http://dx.doi.org/10.1007/978-2-8178-0379-1_21.

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Conference papers on the topic "Scapholunate ligament"

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Gardner, Thomas R., Faiq Amin, Aron M. Trocchia, Andrew J. Cordiale, Michael W. Grafe, Ryan A. Beekman, Nathan L. Taylor, and Melvin P. Rosenwasser. "Comparison of Three Repair Techniques to Restore Scapholunate Kinematics in a Cadaver Model of a Simulated Scapholunate Dissociation." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-176685.

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The scapholunate ligament plays a vital role in normal physiological wrist kinematics. Rupture of this ligament is common and results in a dorsal intercalated segment instability (DISI) deformity that, if not corrected, progresses to a scapholunate advanced collapse (SLAC) wrist. Multiple treatment techniques have been proposed to address scapholunate dissociation such as indirect soft tissue repairs, autografts, allografts, and arthrodesis. Yet no single procedure has proven to be superior clinically or biomechanically for chronic DISI deformity. This study accurately assesses the degree to which three repair techniques, the Reverse Blatt’s Capsulodesis [1] (RBC), the Bone-Ligament-Bone autograft repair technique (BLB) and the Reduction and Association of the Scaphoid and Lunate (RASL), restore the normal physiologic scapho-lunate in vitro kinematics following a simulated scapholunate dissociation in a human cadaveric model.

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Sturgeon, Dannica L., Sang-Pil Lee, Terence E. McIff, E. Bruce Toby, and Kenneth J. Fischer. "Evaluation of Wrist Cartilage With and Without Scapholunate Ligament Injury in Pre and Post Operation Subjects." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53718.

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Hand and wrist injuries commonly occur and can be debilitating. Scapholunate dissociation generally requires surgery, and if left untreated, can lead to scapholunate advanced collapse (SLAC wrist) and associated osteoarthritis [1]. The overall goal of this research is to make a positive impact on the assessment and treatment of wrist injuries and on prevention of osteoarthritis as a result of injury.

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Johnson, Joshua E., Phil Lee, Terence E. McIff, E. Bruce Toby, and Kenneth J. Fischer. "Finite Element Analysis of In Vivo Radiocarpal Contact Mechanics Resulting From Scapholunate Ligament Injury." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80279.

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Secondary osteoarthritis (OA) as a result of joint injury is a significant problem. For the wrist in particular, scapholunate dissociation, resulting from injury to the scapholunate interosseous ligament (SLIL), is a commonly occurring pathology. SLIL tears can lead to scapholunate joint instability due to abnormal motion and load transfer through multiple carpal joints. If left untreated, SLIL injury has been known to progress to scapholunate advanced collapse (or SLAC wrist) with radiocarpal OA [1]. While the pathomechanics leading to the onset of OA are not clearly understood, changes in kinematics and contact mechanics with injury are believed to be causative factors. Of particular importance are joint contact pressures and pressure distributions, which are considered to be important mechanical factors. Comparing changes in joint mechanics between normal and injured wrists may help us better understand the progression of OA and improve the efficacy of corrective measures. Several techniques exist to evaluate joint mechanics. Of these, 3D image-based computational modeling is very useful to determine in vivo joint mechanics. Finite element modeling (FEM) is the most common and widely used computational method because of the ability to obtain 3D stresses and strains, and due to software availability. Therefore the objective of this study was to compare radiocarpal joint mechanics (contact forces, contact areas, contact locations, peak and average contact pressures) from FEM between normal and injured wrists. We hypothesized that peak contact pressures and average contact pressures would be higher in the injured wrists.

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Kallem, Madhan Sai, Sang-Pil Lee, Terence E. McIff, E. Bruce Toby, and Kenneth J. Fischer. "Comparison of Normal Capitate Mid-Carpal Joint Mechanics With the Effects of Scapholunate Dissociation Injury." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53895.

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The wrist is one of the most complicated multibody joints in the human body. It can be subject to many injuries. Scapholunate (SL) dissociation is a relatively common injury that is particularly difficult to diagnose and treat. Without treatment, SL dissociation is known to progress to scapholunate advance collapse (SLAC wrist) and associated osteoarthritis (OA) [1]. Traumatic arthropathy of the wrist due to scapholunate dissociation has a definitive pattern from onset to severe bone and joint degeneration. The altered radiocarpal and SL mechanics with SL dissociation may be accompanied by a secondary carpal collapse between the capitate and lunate [2]. The initial SL disruption causes apparent changes in joint kinematics and contact patterns. Thus, understanding normal and abnormal in vivo contact mechanics as a result of SL ligament injury may lead to more effective treatments that may even prevent the onset of OA. In addition, in vivo contact mechanics data after surgical treatment may help determine the effectiveness of various surgical techniques which are used to correct SL injury.

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Johnson, Joshua E., Sang-Pil Lee, Terence E. McIff, E. Bruce Toby, and Kenneth J. Fischer. "Effects of Surgical Repair or Reconstruction on Radiocarpal Mechanics From Wrists With Scapholunate Injury." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53687.

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Scapholunate dissociation (SL ligament disruption) due to trauma can cause changes in joint kinematics and contact patterns, which can lead to scapholunate advanced collapse (SLAC wrist) with secondary radiocarpal osteoarthritis (OA) [1]. The relationship between consequent abnormal mechanics and the onset of OA is not clearly understood, however elevated joint contact pressure is believed to be an associated factor. Knowing how injuries affect joint physiology and mechanics and how well surgical repairs restore the mechanics may improve surgical efficacy and help predict OA risk. Recently a method was proposed to measure joint contact mechanics from in vivo imaging data during functional loading [2]. The objective of this study was to compare radiocarpal joint mechanics (contact forces, contact areas, peak and average contact pressures) of injured and post-operative wrists to contralateral controls using MRI-based contact modeling. We hypothesized that average contact pressures and peak contact pressures would be higher in the injured wrists, and that these measures would decrease post-operatively.

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Chappell, Isaac D., Phil Lee, Terence E. McIff, E. Bruce Toby, and Kenneth J. Fischer. "In Vivo Evaluation of Wrist Cartilage Integrity Using T2 Relaxation Time After Scapholunate Ligament Injury and Surgical Repair." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80278.

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Osteoarthritis (OA) is a serious and frequently occuring outcome of untreated scapholunate dissocation, the most common form of carpal instability in the wrist [1]. As cartilage degenerates, the water content of surrounding tissue becomes less bound. Magnetic resonance imaging (MRI) T2 relaxation time is longer when water content is less bound [2]. MRI offers the advantageous combination of detailed images of soft tissues such as cartilage with the ability to evaluate free water content. Contrasting the various T2 relaxation times found in the cartilage of healthy wrist surfaces with those of injured wrists is thereby proposed as a method of evaluating cartilage degeneration. We hypothesized that T2 values obtained would be longer for the cartilage of the injured wrists. Though surgical treatment may relieve pain and restore some function to the wrist, it is hypothesized that T2 relaxation time will remain increased after surgery as cartilage regeneration is a very slow process, if it happens at all. The goal of this research is to provide a method to evaluate the biochemical and infer the biomechanical integrity of cartilage for various cartilage surfaces in a wrist after injury.

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Rafijah, Gregory. "Four Corner Intercarpal Arthrodesis." In ASME 2009 4th Frontiers in Biomedical Devices Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/biomed2009-83095.

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Abstract:

Intercarpal arthrodesis is a common motion sparring procedure for post-traumatic arthritis of the wrist. Untreated scaphoid non-union or scapholunate ligament injury often leads to progressive arthritis of the wrist that can be salvaged by proximal row carpectomy (PRC), limited intercarpal arthrodesis or total wrist fusion. Most surgeons elect to perform a motion sparring procedure in lieu of total wrist fusion. PRC is favored by many because of the ease of surgery and no need to obtain bony union. However, several reports are pessimistic about the out comes of the PRC operation in the long term. Most agree that the four corner arthrodesis with scaphoid excision is the optimal reconstruction to maintain wrist motion and strength and provide long-term durability.

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