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van Kampen RJ, Henk Coert J, Moran SL. Mid-term outcomes of three commonly used surgical reconstructions for scapholunate instability. J Hand Surg Eur Vol 2024; 49:852-858. [PMID: 38069863 DOI: 10.1177/17531934231219191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/16/2024]
Abstract
This retrospective analysis reports the mid-term (>2 years) outcomes of capsulodesis, (modified) Brunelli tenodesis and bone-ligament-bone reconstruction for scapholunate ligament instability. In total, 60 patients (64 wrists) returned the Patient-Rated Wrist Evaluation and Disabilities of the Arm, Shoulder, and Hand questionnaires. Of these participants, 42 (46 wrists) returned for a wrist examination and radiographs. In the questionnaire group, the mean follow-up for capsulodesis was 11.8 years, tenodesis 5.9 years and bone-ligament-bone 8.9 years. In the objective outcomes group, the mean follow-up was 10.2 years for capsulodesis, 5.7 for tenodesis and 8.9 for bone-ligament-bone. In all groups, some patients showed radiographic deterioration, which did not always correlate with poor functional outcome. With a mean follow-up greater than 5 years, there was no substantial difference in clinical outcomes and patient-based outcome questionnaires between capsulodesis, tenodesis or bone-ligament-bone reconstruction for the treatment of scapholunate instability. This study emphasizes the need for further research. Surgeons should use the technique that produces the fewest complications.Level of evidence III.
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Affiliation(s)
- Robert J van Kampen
- Department of Plastic, Reconstructive and Hand Surgery, University Medical Centre Utrecht, the Netherlands
| | - J Henk Coert
- Department of Plastic, Reconstructive and Hand Surgery, University Medical Centre Utrecht, the Netherlands
| | - Steven L Moran
- Department of Surgery, Division of Plastic Surgery, Mayo Clinic, Rochester, MN, USA (all work was performed at this location)
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Nakamura T, Cheong Ho P, Atzei A, Corella F, Haugstvedt JR. Revolutions in arthroscopic wrist surgeries. J Hand Surg Eur Vol 2022; 47:52-64. [PMID: 34293945 DOI: 10.1177/17531934211030861] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Recent technical and technological developments in wrist arthroscopic surgery allow for advanced treatments of difficult wrist disorders. In this review, world leaders of wrist arthroscopy describe bone graft for scaphoid nonunion, transosseous repair for triangular fibrocartilage fovea avulsion, palmaris longus reconstruction of the triangular fibrocartilage, and arthroscopic reconstruction of the scapholunate and lunotriquetral ligaments.
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Affiliation(s)
- Toshiyasu Nakamura
- Department of Orthopaedic Surgery, School of Medicine, International University of Health and Welfare, Tokyo, Japan
| | - Pak Cheong Ho
- Department of Orthopaedic & Traumatology, Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong SAR, China
| | - Andrea Atzei
- Pro-Mano, Hand Surgery and Rehabilitation, Treviso, Italy
| | - Fernando Corella
- Hand Surgery Unit, Orthopadic and Trauma Department, Hospital Universitario Infanta Leonor, Madrid, Spain
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Treatment of static scapholunate dissociation using a slip of the flexor carpi radialis. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY AND TRAUMATOLOGY 2020; 30:1299-1306. [PMID: 32447458 DOI: 10.1007/s00590-020-02706-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Accepted: 05/13/2020] [Indexed: 10/24/2022]
Abstract
The purpose of this paper is to examine the results of reconstruction of the dorsal and palmar limbs of the scapholunate interosseous ligament in flexible static scapholunate instability using a slip of flexor carpi radialis tendon. Between June 2012 and August 2018, 13 patients with flexible static scapholunate instability underwent with this surgical technique. Mean patient age at surgery was 42 years. Average follow-up was 52, 8 months. The functional outcome postoperative according to Green and O'Brien was excellent in 1, good in 9 and regular in 3 patients. Postoperative disabilities of the arm, shoulder and hand and modified Mayo scores averaged were 9.02 and 80, respectively. At final follow-up, the radiographic findings demonstrated a significant decrease in scapholunate gap from 5 mm to 2, 5 mm and a significant improvement in scapholunate angle from 65° to 50°. Of the 13 patients, 10 were pain free and 3 had mild pain. Given the small number of cases, few conclusions can be drawn. However, results may be regarded as promising for this technique.
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Oflaz H, Gunal I. Maximum loading of carpal bones during movements: a finite element study. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY AND TRAUMATOLOGY 2018; 29:47-50. [DOI: 10.1007/s00590-018-2287-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/01/2018] [Indexed: 10/28/2022]
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Tratamiento de la disociación estática escafolunar utilizando una plastia de palmar mayor: resultados preliminares. REVISTA IBEROAMERICANA DE CIRUGÍA DE LA MANO 2017. [DOI: 10.1016/j.ricma.2016.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objetivo: Examinar los primeros resultados de la reconstrucción de la zona dorsal y palmar del ligamento escafolunar utilizando una plastia de palmar mayor en el tratamiento de la inestabilidad escafolunar estática reductible.Material y método: Desde junio del 2012, 7 pacientes con inestabilidad escafolunar estática reductible fueron intervenidos con reconstrucción de la zona dorsal y palmar del ligamento escafolunar utilizando una plastia de palmar mayor. La edad media de los pacientes fue de 44años. El seguimiento medio fue de 18 meses (rango 12-35 meses).Resultados: Los resultados funcionales según Green y O’Brien fueron buenos en 6 pacientes y satisfactorios en el otro y según las escalas Quick-DASH y Mayo modificada, 6,3 y 80 respectivamente. Radiográficamente, la diastasis escafolunar y el ángulo escafolunar preoperatorio pasaron de 4,6 a 2,4 mm y de 59,3 a 46,6°, respectivamente, al final del seguimiento.Conclusiones: Los resultados clínicos y radiográficos al final del seguimiento son buenos. Esta técnica permite reconstruir la zona dorsal y palmar del ligamento interóseo escafolunar y reforzar y tensar los ligamentos escafo-trapecio-trapezoidales reconstruyendo eficazmente la anatomía del carpo. Si bien los resultados son esperanzadores, se necesita un mayor número de pacientes y mayor seguimiento para obtener conclusiones más definitivas.
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Biomechanical Properties of First Dorsal Extensor Compartment Regarding Adequacy as a Bone-Ligament-Bone Graft. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2017; 5:e1397. [PMID: 28831343 PMCID: PMC5548566 DOI: 10.1097/gox.0000000000001397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 05/09/2017] [Indexed: 11/27/2022]
Abstract
Bone-ligament-bone grafts for reconstruction of the scapholunate ligament are a valuable tool to prevent disease progression to carpal collapse. Locally available grafts do not require an additional donor site. The first extensor compartment was evaluated biomechanically regarding its possible use as an autograft. METHODS Twelve native fresh-frozen, human cadaver specimens were tested by applying axial tension in a Zwick Roell machine. Load to failure, transplant elongation, and bony avulsion were recorded. The load to failure was quantitated in newtons (N) and the displacement in length (millimeters). Parameters were set at distinct points as start of tension, 1 mm stretch and 1.5 mm dissociation, failure and complete tear, and were evaluated under magnified visual control. Although actual failure occurred at higher tension, functional failure was defined at a stretch of 1.5 mm. RESULTS Mean load at 1 mm elongation was 44.1 ± 28 N and at 1.5 mm elongation 57.5 ± 42 N. Failure occurred at 111 ± 83.1 N. No avulsion of the bony insertion was observed. Half the transplants failed in the central part of the ligament, while the rest failed near the insertion but not at the insertion itself. Analysis of tension strength displayed a wide range from 3.8 to 83.7 N/mm at a mean of 33.4 ± 28.4 N/mm. CONCLUSIONS The biomechanical tensile properties of the first dorsal extensor compartment are similar to those of the dorsal part of the scapholunate ligament. A transplant with a larger bone stock and a longer ligament may display an advantage, as insertion is possible in the dorsal, easily accessible part of the carpal bones rather than in the arête-like region adjacent to the insertion of the scapholunate ligament. In this study, 1.5 mm lengthening of the bone-ligament-bone transplant was defined as clinical failure, as such elongation will cause severe gapping and is considered as failure of the transplant.
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Petersen W, Rothenberger J, Schaller HE, Rahmanian-Schwarz A, Held M. Experiences with Osteoligamentoplasty According to Weiss for the Treatment of Scapholunate Dissociation. J INVEST SURG 2017; 31:313-320. [PMID: 28829651 DOI: 10.1080/08941939.2017.1330907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND In post-traumatic, dynamic, or static scapholunate (SL) instability, an SL ligament reconstruction is advisable to avoid long-term complications. However, a sufficient primary reconstruction is best achieved in acute injuries. For chronic SL dissociation, there is still no satisfying standard surgical technique. In this context, we evaluated the clinical outcome of Weiss's osteoligamentoplasty as a treatment option. METHODS Over a three-year period, 16 patients with chronic and symptomatic SL dissociation Grade-II and III, without the signs of osteoarthrosis were, surgically treated using a bone-retinaculum-bone autograft from the distal radius. All patients underwent prior wrist arthroscopy. The clinical outcome was measured using the Mayo-Wrist, Krimmer, and DASH score. In addition, radiological measurements were also performed. RESULTS The postoperative clinical outcome successfully increased the Mayo-Wrist score: 32 to 64 points, Krimmer score: 30 to 53 points and DASH score: 41 to 30 points. The radiological follow-up demonstrated no evidence of an SL gap or significant loss of reposition in the SL angle in 13 of the 16 cases. Till date, two patients had to be revised to an arthrodesis. CONCLUSIONS The autogenous osteoligamentary span from the distal radius improves a chronic SL dissociation and, therefore, presents a suitable option to anatomically reconstruct the SL ligament. It leads to a proper realignment of the carpus and could help to prevent arthritic changes of the wrist. Nevertheless, in patients with postoperative high occupational physical strain, the procedure should be performed with reservations. As long as there is no satisfying standard surgical treatment, Weiss's osteoligamentoplasty is a convincing technique.
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Affiliation(s)
- W Petersen
- a BG Trauma Center, Department of Plastic, Reconstructive, Hand and Burn Surgery , Tuebingen , Baden Wuerttemberg , Germany
| | - J Rothenberger
- a BG Trauma Center, Department of Plastic, Reconstructive, Hand and Burn Surgery , Tuebingen , Baden Wuerttemberg , Germany
| | - H E Schaller
- a BG Trauma Center, Department of Plastic, Reconstructive, Hand and Burn Surgery , Tuebingen , Baden Wuerttemberg , Germany
| | - A Rahmanian-Schwarz
- b Clinic Traunstein, Department of Plastic, Reconstructive, Aesthetic and Hand Surgery , Traunstein , Bavaria , Germany
| | - M Held
- a BG Trauma Center, Department of Plastic, Reconstructive, Hand and Burn Surgery , Tuebingen , Baden Wuerttemberg , Germany
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Mathoulin C. Treatment of dynamic scapholunate instability dissociation: Contribution of arthroscopy. HAND SURGERY & REHABILITATION 2016; 35:377-392. [DOI: 10.1016/j.hansur.2016.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 08/23/2016] [Accepted: 09/14/2016] [Indexed: 02/02/2023]
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Dellarosa N, Ozben H, Abate M, Russomando A, Petrella G, Landi A. An arthroscopic-assisted minimal invasive method for the reconstruction of the scapho-lunate ligament using a bone-ligament-bone graft. J Hand Surg Eur Vol 2016; 41:64-71. [PMID: 25515919 DOI: 10.1177/1753193414563012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 10/31/2014] [Indexed: 02/03/2023]
Abstract
UNLABELLED We report the outcomes of an arthroscopic-assisted minimally invasive technique to reconstruct the scapho-lunate ligament using a bone-ligament-bone graft in 11 patients (11 wrists). The mean follow-up time was 29 months (range 20 to 38). The preoperative mean wrist flexion, extension, grip strength and patient-rated wrist evaluation score values were 61°, 54°, 115 N and 54, respectively. The postoperative mean values were 64°, 58°, 142 N and 15, respectively. There were no statistical differences between the pre- and postoperative wrist flexion and extension, whereas changes in grip strength and patient-rated wrist evaluation score were significant. Scapho-lunate angles decreased significantly from 69° to 60°. Based on our clinical outcomes, this method provides a reliable alterative for the reconstruction of the scapho-lunate ligament in patients with persistent Geissler type 3 and 4 lesions in the short-term. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- N Dellarosa
- Azienda Ospedaliero - Universitaria Policlinico di Modena, Hand Surgery and Microsurgery Unit
| | - H Ozben
- Koc University, School of Medicine, Department of Orthopaedics and Traumatology, Istanbul, Turkey
| | - M Abate
- Department of Orthopaedics and Traumatology, Azienda Ospedaliera di Rilievo Nazionale e di Alta Specializzazione Garibaldi
| | - A Russomando
- Azienda Ospedaliero - Universitaria Policlinico di Modena, Hand Surgery and Microsurgery Unit
| | - G Petrella
- Azienda Ospedaliero - Universitaria Policlinico di Modena, Hand Surgery and Microsurgery Unit
| | - A Landi
- Azienda Ospedaliero - Universitaria Policlinico di Modena, Hand Surgery and Microsurgery Unit
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Elgammal A, Lukas B. Mid-term results of ligament tenodesis in treatment of scapholunate dissociation: a retrospective study of 20 patients. J Hand Surg Eur Vol 2016; 41:56-63. [PMID: 26058802 DOI: 10.1177/1753193415587871] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 04/21/2015] [Indexed: 02/03/2023]
Abstract
UNLABELLED The purpose of this retrospective study was to assess the modified Brunelli technique for the treatment of chronic irreparable complete scapholunate ligament rupture, causing a reducible carpal malalignment without secondary osteoarthritis. A total of 20 patients were treated using this technique. At a mean follow-up period of 24 months (range 6-53, SD 15), pain on a visual analogue scale had improved from 6 (range 3-10) to 3 (range 0-7). Function measured with the DASH score had improved from 37 (range 11-90) to 20 (range 0-53). Range of motion was reduced in flexion by a mean of 19° (range 10-45), and in extension by a mean of 14° (range 0-35). Mean grip strength at last follow-up was 81% of the uninjured hand (range 50-100%) Three patients developed scapholunate advanced collapse (stage II) requiring salvage surgery. Scapholunate ligament reconstruction with the modified Brunelli technique showed satisfactory results in this study. Extended studies are needed to determine the long-term benefits of this reconstructive procedure. LEVEL OF EVIDENCE IV.
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Affiliation(s)
| | - B Lukas
- Hand, Elbow and Plastic Surgery Department, Schön Klinik München, Harlaching, Germany
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Nakamura T, Abe K, Iwamoto T, Ochi K, Sato K. Reconstruction of the Scapholunate Ligament Using Capitohamate Bone-Ligament-Bone. J Wrist Surg 2015; 4:264-268. [PMID: 26539327 PMCID: PMC4626221 DOI: 10.1055/s-0035-1566268] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background The biomechanical properties of the capitohamate (CH) ligament are equivalent to those of the scapholunate (SL) interosseous ligament. We reconstructed the SL ligament using the CH bone-ligament-bone substitute for chronic injury of the SL ligament. Patients and Methods Beginning in 2008, 15 wrists of 14 patients with an average age of 38 years underwent this procedure with a minimum follow-up of 2 years. Thirteen wrists had an SL joint gap more than 3 mm, and two had a complete SL ligament disruption with a severe dorsal intercalated segment instability (DISI) deformity. Kirschner wires (K-wires) were removed 8 weeks after the surgery, then active ROM exercise began. Pain (on visual analog scale [VAS]), wrist motion (angle), radiographic characteristics, such as SL gap (mm) and SL angle, and Modified Mayo Wrist Score (MMWS) were evaluated. Technique The SL joint was reduced by manipulation or with the use of joysticks, then temporary fixed with K-wires. A dorsal trough was then made between the scaphoid and the lunate. The proximal half of the CH ligament was harvested with attached bone from the capitate and hamate (CH bone-ligament-bone), inset into the SL trough, and fixed firmly with 1.2-mm diameter titanium screws in the scaphoid and lunate, respectively. Results The VAS improved from 77 preoperatively to 12 postoperatively. The average wrist extension/flexion was 74°/60°. There was no ossification of the reconstructed SL at the final follow-up. The SL gap improved from an average of 4.8 mm to an average of 2.1 mm, and the SL angle changed from 67° to 55°. The MMWS improved to 82 points postoperatively from a preoperative average of 47 with eight excellent, five good, and two fair results.
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Affiliation(s)
- Toshiyasu Nakamura
- Department of Orthopaedic Surgery, International University of Health and Welfare, Sanno Hospital, Tokyo, Japan
| | - Koji Abe
- Department of Orthopaedic Surgery, International University of Health and Welfare, Sanno Hospital, Tokyo, Japan
| | - Takuji Iwamoto
- Department of Orthopaedic Surgery, Keio University, Tokyo, Japan
| | - Kensuke Ochi
- Department of Orthopaedic Surgery, Keio University, Tokyo, Japan
| | - Kazuki Sato
- Department of Orthopaedic Surgery, Keio University, Tokyo, Japan
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van Kampen RJ, Bayne CO, Moran SL, Berger RA. Outcomes of Capitohamate Bone-Ligament-Bone Grafts for Scapholunate Injury. J Wrist Surg 2015; 4:230-238. [PMID: 26539325 PMCID: PMC4626222 DOI: 10.1055/s-0035-1556866] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Purpose In an attempt to restore natural carpal kinematics more closely, bone-ligament-bone (BLB) grafts have been described for treating scapholunate (SL) injury. In this article we report the long-term results of capitohamate BLB autograft for the treatment of SL dissociation. Methods The medical records of patients treated with capitohamate BLB grafts for SL dissociation were retrospectively reviewed. Twenty-three patients were available for evaluation. Patients were sent a Disabilities of the Arm, Shoulder, and Hand (DASH) and a Patient-Rated Wrist Evaluation (PRWE) questionnaire and returned for exam. Thirteen patients returned the questionnaire, and 12 wrists were examined. Range of motion, grip strength, pain, complications, return to work, and radiographic parameters were documented. Results The average length of follow-up evaluation was 9.2 years. The average SL gap was 4.5 mm preoperatively and 3.6 mm at final follow-up. The average SL angle was 70 degrees preoperatively and 73 degrees at final follow-up. There was no statistically significant difference in preoperative versus postoperative flexion, extension, radial deviation, ulnar deviation, or grip strength. The average postoperative visual analog scale (VAS) score was 1.25 at rest and 3.58 with activity. The average Mayo Wrist Score was 66.8 preoperatively and 70.9 postoperatively (p = 0.158). The average postoperative PRWE was 20.5, and average postoperative DASH was 15.1. At final follow-up, four patients had no radiographic evidence of arthritis. Two patients had evidence of early-stage radiocarpal arthritis, four had evidence of midcarpal arthritis, and two had radiographic evidence of mild scaphotrapeziotrapezoid arthritis. One patient required a salvage procedure with four-corner fusion. Discussion BLB reconstruction can be used to treat SL instability. At final follow-up, the majority of patients did not worsen clinically or functionally or require secondary salvage procedures; however, radiologic progression of arthritis was not prevented. These outcomes are comparable to midterm results of other SL reconstructive options; thus, we have abandoned this technique for other less technically demanding procedures. Level of Evidence IV.
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Affiliation(s)
| | | | - Steven L. Moran
- Department of Orthopedics, Mayo Clinic, Rochester, Minnesota
| | - Richard A. Berger
- Division of Hand Surgery, Department of Orthopedics Surgery, Mayo Clinic, Rochester, Minnesota
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Gray A, Cuénod P, Papaloïzos MY. Midterm Outcome of Bone-Ligament-Bone Graft and Dorsal Capsulodesis for Chronic Scapholunate Instability. J Hand Surg Am 2015; 40:1540-6. [PMID: 26092663 DOI: 10.1016/j.jhsa.2015.04.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 04/24/2015] [Accepted: 04/24/2015] [Indexed: 02/02/2023]
Abstract
PURPOSE To assess midterm outcomes of our bone-ligament-bone (BLB) grafts for chronic scapholunate (SL) instability and better define criteria for their use. METHODS We conducted a retrospective review of 26 patients treated with BLB grafts and dorsal capsulodesis between 1997 and 2009. Twenty-four patients were reviewed. Mean follow-up was 8.2 years. Two patients had dynamic lesions, 7 had SL dissociation, 14 had a dorsal intercalated segment instability lesion, and 1 had SL advanced collapse stage 1. Mean age at surgery was 46 years. All patients presented with pain and 14 had lack of strength. Results were reviewed clinically and radiologically. Images were assessed by 4 surgeons and 1 radiologist for radial styloid, radioscaphoid, radiolunate, midcarpal, and scaphotrapeziotrapezoid degenerative changes. RESULTS Five patients needed subsequent 4-corner arthrodesis. Of the remaining 19 patients at follow-up, both extension and flexion decreased to 73% of the contralateral side. Postoperative grip strength improved from 78% to 90% of the nonsurgical wrist. Quick Disabilities of the Arm, Shoulder, and Hand score was 10 of 100 and the Patient-Rated Wrist Evaluation score was 10 of 100. Radiologically, the SL gap was improved and maintained at follow-up. The SL angle (mean before surgery, 79°) was initially corrected to 69° but returned to preoperative values at follow-up. Eleven of the 19 cases had signs of midcarpal arthritis. CONCLUSIONS Bone-ligament-bone grafts with SL dorsal capsulodesis were able to restore and maintain an improved SL interval in all patients. The technique achieved good clinical results and high patient satisfaction, but it did not stop the progression of arthritis, particularly at the midcarpal level. This technique is an option for isolated unrepairable lesion of the dorsal SL ligament with an easily correctable lunate and especially when restoration of grip strength is important. TYPE OF STUDY/LEVEL OF EVIDENCE Therapeutic IV.
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Affiliation(s)
- Anne Gray
- Centre Hospitalier du Valais Romand (CHVR), Sierre, Switzerland
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Ellanti P, Sisodia G, Al-Ajami A, Ellanti P, Harrington P. The modified Brunelli procedure for scapholunate instability: a single centre study. ACTA ACUST UNITED AC 2014; 19:39-42. [PMID: 24641739 DOI: 10.1142/s0218810414500075] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Management of scapholunate (SL) instability remains controversial. The modified Brunelli procedure is a soft tissue procedure that recreates the stabilising forces of the SL ligament using a split flexor carpi radialis tendon graft passed from volar to dorsal via a tunnel in the distal pole of the scaphoid. Thirteen consecutive patients with an average age of 35 years underwent the modified Brunelli procedure. Pain improved from a mean visual analog score of eight preoperatively to 1.5. The DASH score improved from a preoperative score of 55.4 to 34.9 as did the grip strength from 40% to 75% respectively. All wrist ranges of motion were decreased post-operatively in particular wrist flexion. SL ligament reconstruction using the modified Brunelli procedure resulted in satisfactory outcomes. Post-operatively patients were relatively pain free, with improved grip strength. The range of motion was reduced postoperatively, however did not restrict return to work or premorbid activities.
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Affiliation(s)
- Prasad Ellanti
- Department of Orthopaedics, Our Lady's Hospital, Navan, Co-Meath, Ireland
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Biomechanical comparison of the hand-based transplant used in bone-tissue-bone scapho-lunate ligament reconstruction. ACTA ACUST UNITED AC 2014; 33:23-8. [PMID: 24412134 DOI: 10.1016/j.main.2013.11.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 10/14/2013] [Accepted: 11/01/2013] [Indexed: 11/21/2022]
Abstract
Although work has been published comparing the five most commonly used transplant techniques to the properties of the scapho-lunate interosseous ligament (SLIL), no study has been carried out which compares the biomechanical properties of the different bone-tissue-bone autografts to each other, using a standard methodology of testing. The hypothesis of this study was that mechanically significant differences in the material properties of commonly used bone-tissue-bone exist when compared to each other. We tested the dorsal part of the SLIL and the five most quoted transplants in the literature: capitate to trapezoid; trapezoid to second metacarpal; third metacarpal-carpal; dorsal capitate-hamate; 4-5 extensor retinaculum. For each transplant, we measured failure load, failure displacement, width, and thickness. Anova was used to compare the different results obtained and the level of significance attributed to P<0.05. Load to failure were: SLIL 94.3±42.86N; capitate to trapezoid 37.7±23.13N; trapezoid to second metacarpal 45.43±14.28N; third metacarpal-carpal 60.11±19.94N; dorsal capitate-hamate 63±25.51N; 4-5 retinaculum 15.67±10.7N. Only the dorsal capitate-hamate ligament showed to have no significant (P>0.05) difference in term of load to failure, all the others was significantly weaker (P<0.05). Previous biomechanical studies have identified the dorsal region of the SLIL as the most structurally and functionally important area of the SLIL. As a result, attention has been more specifically brought to the replacement of the dorsal portion of the SLIL. An attempt to achieve a reconstruction that reproduces more closely the SLIL has generated research on the use of bone-tissue-bone composite graft, several donor sites have been used in order to find the most similar. Our results suggest that, using a normalized method to compare the previously described grafts harvested at the wrist level, that the dorsal capitate-hamate ligament has the closest properties to the native dorsal scapho-lunate ligament.
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Nienstedt F. Treatment of static scapholunate instability with modified Brunelli tenodesis: results over 10 years. J Hand Surg Am 2013; 38:887-92. [PMID: 23566723 DOI: 10.1016/j.jhsa.2013.02.022] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2012] [Revised: 02/08/2013] [Accepted: 02/11/2013] [Indexed: 02/02/2023]
Abstract
PURPOSE To examine the long-term results of the modified Brunelli tenodesis using a strip of the flexor carpi radialis tendon as a ligament substitute to maintain reduced rotatory subluxation of the scaphoid for scapholunate instability. METHODS Between 1995 and 1998, 10 patients with scapholunate instability underwent the modified Brunelli procedure. We reviewed 8 patients with static instability with a mean follow-up of 13.8 years (range, 12-15 y). The mean age of patients was 40 years at the time of surgery. The mean period from the injury to surgical treatment was 4 months. RESULTS The functional outcome according to Green and O'Brien was excellent or good in 7 of 8 patients. Postoperative Disabilities of the Arm, Shoulder, and Hand and modified Mayo scores averaged 9 and 83, respectively. At final follow-up, average total wrist motion and grip strength were 85% of the opposite normal side. Of the 8 patients, 6 were pain free; 1 patient had slight and occasional pain, and another had chronic pain. On radiographs, the average preoperative scapholunate gap was 5.1 mm. It was corrected to 2.4 mm at surgery and was 2.8 mm at final follow-up. The average scapholunate angle was 72° preoperatively, 46° postoperatively, and 63° at final follow-up. We observed degenerative osteoarthritis in 1 case. CONCLUSIONS Because the number of cases is small, only a few conclusions can be made. At final follow-up there was a certain loss of scapholunate reduction. The fact that we observed arthritic changes in only 1 of 8 cases suggests that carpal stability obtained by this procedure is probably sufficient to obtain good functional long-term results. Long-term studies with more cases are required to evaluate this method, which has shown encouraging results in the present study. TYPE OF STUDY/LEVEL OF EVIDENCE Therapeutic IV.
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Affiliation(s)
- Frank Nienstedt
- Department of Orthopaedics and Traumatology, San Maurizio Hospital, Bolzano, Italy.
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Luchetti R, Atzei A, Cozzolino R, Fairplay T. Current role of open reconstruction of the scapholunate ligament. J Wrist Surg 2013; 2:116-125. [PMID: 24436803 PMCID: PMC3699272 DOI: 10.1055/s-0033-1343092] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This paper is a review of the various surgical techniques used in repair or reconstruction of the scapholunate ligament according to the clinical stages and anatomic-pathologic findings. Arthroscopy permits a direct evaluation of the scapholunate injury and the status of the articular surfaces. Specific indications for each type of scapholunate ligament tear are proposed, from the different types of dorsal capsulodesis to bone-ligament-bone techniques and tenodesis procedures. The authors' preferred techniques and literature review of the expected outcomes are presented.
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Affiliation(s)
| | - Andrea Atzei
- Fenice Hand Surgery and Rehabilitation Team, Treviso, Pordenone, Italy
| | | | - Tracy Fairplay
- Studio Fairplay, Hand Rehabilitation Private Center, Bologna, Italy
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Maillot-Roy S, Goubier JN, Dinh A, Teboul F, Dubert T, Osman N. [Scaphotriquetral capsulodesis for scapholunate instability]. ACTA ACUST UNITED AC 2011; 30:276-81. [PMID: 21816651 DOI: 10.1016/j.main.2011.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Revised: 04/19/2011] [Accepted: 06/20/2011] [Indexed: 10/17/2022]
Abstract
OBJECTIVES Scapholunate ligament injuries may lead to scapholunate instability and wrist osteoarthritis. Many surgical techniques have been described to repair these injuries. The goal of our study is to assess the clinical results after capsulodesis with the scaphotriquetral ligament for scapholunate instabilities. METHODS Twenty-eight patients, 22 men and six women, were operated for scapholunate instability between January 2006 and December 2008. The average age was 37.8 years, and the average time between trauma and surgery was 9.9 months. The scaphoid shift test was present in 26 patients. All patients underwent static and dynamic X-rays of the wrist and scan. A capsulodesis with scaphotriquetral ligament was performed in all patients. RESULTS At 24 months follow-up, a 13° significant decreased of wrist range-of-motion was noted. The strength was significantly improved after surgery. The wrist stability was improved in 26 patients. Concerning pain, a significant reduction was noted with Analogical Visual Scale after surgery (p<0.005). Twenty-one patients returned to their previous work. Complications were reflex dystrophy in one patient and wrist infection in one patient. CONCLUSION Many techniques were described for treatment of scapholunate injuries, from the simple scapholunate ligament suture to partial wrist arthrodesis. Capsulodesis with scaphotriquetral ligament improves grip strength, decreases wrist instability and pain with a slight lost of range-of-motion.
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Affiliation(s)
- S Maillot-Roy
- Clinique La Francilienne, 16, avenue de l'Hôtel-de-Ville, 77340 Pontault-Combault, France
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Kalb K, Prommersberger KJ. [Treatment of chronic scapholunate dissociation using Cuénod's bone-ligament-bone autograft]. OPERATIVE ORTHOPADIE UND TRAUMATOLOGIE 2010; 21:417-28. [PMID: 20058121 DOI: 10.1007/s00064-009-1904-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Correction of chronic scapholunate dissociation by replacement of the biomechanically most important dorsal part of the scapholunate ligament using a bone-ligament-bone autograft taken from the carpometacarpal joint II and, additionally, a modified dorsal capsulodesis. INDICATIONS Nonfixed chronic scapholunate dissociation without useful remnants of the ligament in which loss of the dorsal part of the scapholunate ligament is the crucial pathophysiological moment. CONTRAINDICATIONS Chronic scapholunate dissociation with fixed deformity. Osteoarthritis. SURGICAL TECHNIQUE Dorsal incision. Approach to the wrist using the capsular flap described by Berger. Reduction of deformity and temporary transfixation of the scaphoid to the capitate as well as to the lunate. Creation of a trough at the ulnar edge of the dorsal aspect of the scaphoid and another trough at the radial edge of the dorsal aspect of the lunate. Fixation of an exactly fitting bone-ligament-bone autograft taken from the trapezoidometacarpal joint II with 1.2-mm screws into the troughs. Fixation of a part of the dorsal intercarpal ligament which is based on the scaphoid to the lunate using a bone anchor. POSTOPERATIVE MANAGEMENT Immobilization using a below-elbow cast including the metacarpophalangeal joint of the thumb for 8 weeks; removal of Kirschner wires 10 weeks postoperatively; after Kirschner wire removal physiotherapy to improve range of motion. RESULTS Twelve out of 16 male patients were available for a clinical and radiologic examination after a mean follow-up time of 6.3 years (minimum 1.6, maximum 7.3 years). Clinical results were excellent. The modified Mayo Wrist Score averaged 87 points (minimum 65, maximum 100 points). Eleven patients had an excellent or good result, none of the patients showed a poor result. The DASH Score (Disability of the Arm, Shoulder and Hand) was 13 points on average (minimum 0, maximum 42 points). All patients would have the same operation again. Radiologically, a stretching of the bone-ligament-bone autograft was found in six cases. A symptomatic SLAC (scapholunate advanced collapse) wrist with the need for a salvage operation could not be observed.
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Affiliation(s)
- Karlheinz Kalb
- Klinik für Handchirurgie, Rhön-Klinikum, Bad Neustadt an der Saale, Germany.
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Stephan C, Prommersberger KJ, van Schoonhoven J. [Dorsal capsulodesis for the treatment of scapholunate instability]. OPERATIVE ORTHOPADIE UND TRAUMATOLOGIE 2010; 21:405-15. [PMID: 20058120 DOI: 10.1007/s00064-009-1907-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To regain stability of the proximal carpal row after scapholunate ligament rupture in order to avoid osteoarthritis and carpal collapse. INDICATIONS As additional therapy in scapholunate ligament repair especially in patients with static, but reducible scapholunate malalignment. CONTRAINDICATIONS Fixed scapholunate malalignment. Osteoarthritis of the radiocarpal or the midcarpal joint. SURGICAL TECHNIQUE Dorsal approach to the carpal joint with release of the second, third and fourth extensor compartment and resection of the dorsal interosseous nerve. Opening of the radiocarpal joint for inspection of the chondral surfaces and the scapholunate ligament for possible repair. If needed, reduction of scaphoid and lunate. Repair of the scapholunate ligament. If a reduction of scaphoid and lunate is necessary, temporary Kirschner wire fixation of the scaphoid to the capitate and the lunate. The dorsal intercarpal ligament is identified and its middle third is dissected and elevated from the triquetrum remaining attached to the distal scaphoid pole. The ulnar end of the elevated part of the dorsal intercarpal ligament is pulled through a split in the dorsal radiotriquetral ligament and fixed to itself. Closure of the proximal and distal third of the dorsal intercarpal ligament. POSTOPERATIVE MANAGEMENT Management Immobilization in a below-elbow cast including the metacarpophalangeal joint of the thumb for 6 weeks. Removal of the Kirschner wires, if used, 8 weeks postoperatively. Physiotherapy to improve wrist motion. RESULTS Most of the reports in the literature show an improvement of pain. The effect on radiologic parameters and the development of osteoarthritis remains uncertain.
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Chabas JF, Gay A, Valenti D, Guinard D, Legre R. Results of the modified Brunelli tenodesis for treatment of scapholunate instability: a retrospective study of 19 patients. J Hand Surg Am 2008; 33:1469-77. [PMID: 18984325 DOI: 10.1016/j.jhsa.2008.05.031] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2007] [Revised: 05/23/2008] [Accepted: 05/27/2008] [Indexed: 02/02/2023]
Abstract
PURPOSE Management of chronic scapholunate (SL) instability without osteoarthritis remains controversial. In order to recreate an SL interosseous linkage, some surgeons opt for a limited wrist arthrodesis, whereas others use soft tissue stabilization. The purpose of the current study was to review and assess the therapeutic benefit of the modified Brunelli tenodesis that used the flexor carpi radialis tendon to replicate the stabilizing ligaments of the scaphoid. METHODS Between 2001 and 2005, 19 tenodesis procedures have been performed to correct dynamic or static SL instability without osteoarthritis. On average, patients had surgery 15 months after injury. The mean follow-up was 37 months. RESULTS After surgery, 15 patients had no to mild pain with a mean visual analog scale score of 3 of 10. The average wrist motion was 50 degrees extension, 41 degrees flexion, 24 degrees radial deviation, and 29 degrees ulnar deviation (75%, 73%, 68%, and 86% of the uninvolved wrists, respectively). The grip strength was 78% of the uninvolved wrists. On radiographs, the mean static SL distance was 2.4 mm (2.8 mm before surgery). There was no widening of the SL gap compared to the immediate postoperative gap. The SL angle improved from a mean preoperative value of 61 degrees to 53 degrees immediately after surgery and rose again to 62 degrees at the time of the review. One patient developed a scapholunate advanced collapse wrist stage 2. CONCLUSIONS Ligament reconstruction using tendon grafts gave satisfactory results to correct reducible chronic SL instability without osteoarthritis. This repair technique achieved a relatively pain-free wrist, with acceptable grip strength and normal SL distance but with a loss in the arc of motion and a loss of correction of SL angle. TYPE OF STUDY/LEVEL OF EVIDENCE Therapeutic IV.
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Affiliation(s)
- Jean-François Chabas
- Department of Hand Surgery and Reconstructive Limb Surgery, La Conception Teaching Hospital, Marseille, France.
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Gajendran VK, Peterson B, Slater RR, Szabo RM. Long-term outcomes of dorsal intercarpal ligament capsulodesis for chronic scapholunate dissociation. J Hand Surg Am 2007; 32:1323-33. [PMID: 17996765 DOI: 10.1016/j.jhsa.2007.07.016] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2007] [Revised: 07/21/2007] [Accepted: 07/24/2007] [Indexed: 02/02/2023]
Abstract
PURPOSE Chronic scapholunate dissociation is the most common cause of symptomatic wrist instability. In an attempt to restore normal carpal mechanics and prevent wrist arthrosis, we developed and tested biomechanically the dorsal intercarpal ligament capsulodesis (DILC). Previously, we reported good early clinical results for this procedure at an average follow-up period of 25 months. Here, we report on the functional and radiographic outcomes at a longer follow-up period of a minimum of 5 years. METHODS Records of patients undergoing the DILC for chronic (greater than 6 weeks), flexible, static scapholunate dissociation were reviewed. Only patients with follow-up evaluation of greater than 60 months were included. Physical examination, radiographs, and validated outcome instruments were used to evaluate the patients. RESULTS Twenty-one patients (22 wrists) met the inclusion criteria. Fifteen of 21 patients (16 wrists) were available for follow-up evaluation. Average follow-up period was 86 months. Physical examination revealed average wrist flexion and extension of 50 degrees and 55 degrees , respectively, radial and ulnar deviation of 17 degrees and 36 degrees , respectively, and grip strength of 43 kgf. Disabilities of the Arm, Shoulder and Hand, Short Form-12, and Mayo wrist scores averaged 19, 78, and 78, respectively. Radiographs revealed an average scapholunate angle and gap of 62 degrees and 3.5 mm, respectively. Eight of the 16 wrists in our study demonstrated arthritic changes on radiographs. CONCLUSIONS The DILC does not consistently prevent radiographic deterioration and the development of arthrosis in the long-term; however, the level of functionality and patient satisfaction remained relatively high in 58% of our patients, suggesting a lack of correlation between the radiographic findings and development of arthrosis and the functional outcomes and patient satisfaction. We believe that the DILC is still a reasonable option for treating flexible static scapholunate dissociation in patients without radiographic signs of arthritis presenting with wrist pain despite conservative treatment. Prevention of radiographic deterioration and arthrosis remains an unsolved problem.
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Affiliation(s)
- Varun K Gajendran
- Department of Orthopaedic Surgery, University of California, Davis, Sacramento, CA 95817, USA
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Moran SL, Cooney WP, Berger RA, Strickland J. Capsulodesis for the treatment of chronic scapholunate instability. J Hand Surg Am 2005; 30:16-23. [PMID: 15680551 DOI: 10.1016/j.jhsa.2004.07.021] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2003] [Accepted: 07/29/2004] [Indexed: 02/02/2023]
Abstract
PURPOSE Scapholunate (SL) instability is the most common form of carpal instability. The treatment of this disorder is challenging and varying treatment options have been described. The purpose of this study was to examine the intermediate-term results of dorsal capsulodesis for cases of chronic SL dissociation. METHODS A retrospective analysis was conducted that examined all dorsal capsulodesis procedures performed for chronic SL dissociation between January of 1990 and February of 2000. Wrist pain had to be present for greater than 3 months. Patients had to have a minimum follow-up period of 2 years for inclusion in the study. Thirty-one patients were identified with isolated chronic SL dissociation. Of the 31 patients 18 had dynamic carpal instability and 13 had static carpal instability. The time from injury to surgery averaged 20 months. The follow-up period averaged 54 months (range, 24-96 mo). All patients had a dorsal capsulodesis procedure using either a Blatt or Mayo technique. Results were reviewed clinically and radiologically. Static and dynamic groups were compared with a Student t test. RESULTS There was a 20% decrease in wrist motion after capsulodesis. There was no improvement in grip strength after surgery. Most patients had improvement in pain but only 2 patients were completely pain free. Radiographically the SL gap increased over time from 2.7 mm before surgery to 3.9 mm at the final follow-up evaluation. The SL angle also increased from 56 degrees before surgery to 62 degrees on final follow-up evaluation. There was no statistical difference in overall wrist motion, grip strength, or wrist score between the dynamic and static groups. The time to surgery and age had no significant effect on overall outcome. CONCLUSIONS Dorsal capsulodesis provided pain relief for patients with both dynamic and static SL instability. Although pain was improved it was not completely resolved in the majority of cases. From a radiographic perspective dorsal capsulodesis did not provide maintenance of carpal alignment in cases of chronic SL dissociation.
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Affiliation(s)
- Steven L Moran
- Division of Hand Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
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Abstract
Ulnar instabilities of the carpus are rare findings depending on a dissociation of the lunotriquetral (LT-) junction. They are frequently not recognized or confused with ulnocarpal complaints of other origin due to missing typical clinical or radiological indications. The central structures are the os triquetrum and its connections to the os lunatum, the distal carpal row, radius and ulna. The most important causes are injuries, but degeneration, ulnar impaction syndrome or the ulna plus variant can also be involved. The symptoms are ulnar-sided pain, sensations of instability and weakness as well as "clunking" sensations in the ulnar wrist. Clinical examination may reveal tenderness in the LT-interval, between the ECU- and FCU-tendons, and displacement of the triquetrum on palpation. The LT-interval is rarely extended in conventional X-rays. A VISI position of the os lunatum is found in instabilities of higher degree. A distinct diagnosis is only achieved by arthroscopy. Conservative treatment consists of 4-8 weeks of arm immobilization. Diagnostic arthroscopy can be combined with débridement and/or closed reduction of the LT-interval with consecutive percutaneous k-wire fixation. If a repair of the LT-ligament is not possible, reconstructive methods are indicated. They include extrinsic tenodesis with part of the extensor carpi ulnaris tendon, ligamentoplasty or osteoligamentous autografts. The role of lunotriquetral arthrodesis is considered to be controversial, due to a high rate of non-fusions. Simple correction of the LT-dissociation does not resolve the static instability of the proximal row (VISI-position of the lunatum). In these cases, salvage procedures such as limited arthrodesis of the wrist, proximal row carpectomy or complete arthrodesis are indicated.
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Affiliation(s)
- T Pillukat
- Klinik für Handchirurgie, Rhön-Klinikum, Bad Neustadt an der Saale.
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Bloom HT, Freeland AE, Bowen V, Mrkonjic L. The treatment of chronic scapholunate dissociation: an evidence-based assessment of the literature. Orthopedics 2003; 26:195-203; quiz 204-5. [PMID: 12597229 DOI: 10.3928/0147-7447-20030201-28] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Heidi Taylor Bloom
- Department of Orthopedic Surgery and Rehabilitation, University of Mississippi Medical Center, Jackson, Miss 39216-4505, USA
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