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Mark Tauber - One of the best experts on this subject based on the ideXlab platform.
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arthroscopic coracoclavicular and Acromioclavicular stabilization of acute Acromioclavicular Joint dislocation by suspensory fixation system
Arthroscopy techniques, 2019Co-Authors: Mark Tauber, Frank Martetschlager, P Habermeyer, Hisham Anis SelimAbstract:Abstract Arthroscopic stabilization of acute Acromioclavicular Joint dislocations using coracoclavicular suspension techniques has become more popular, but lack of horizontal stability is a major concern that furthermore affects the final outcome. We present an arthroscopic technique to stabilize acute Acromioclavicular Joint dislocations in both the vertical and horizontal planes, with better results than conventional coracoclavicular suspension techniques.
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Resch H: Semitendinosus tendon graft versus a modified Weaver-Dunn procedure for Acromioclavicular Joint reconstruction in chronic cases: a prospective comparative study
2016Co-Authors: Mark Tauber, Michael Fox, Herbert ReschAbstract:Background: Biomechanical studies comparing various surgical techniques for Acromioclavicular Joint reconstruction have reported that semitendinosus tendon graft for coracoclavicular ligament reconstruction provides a substantial improvement in initial stability and a load-to-failure equivalent to the intact coracoclavicular ligaments. Although it represents a biomechanical improvement compared with coracoacromial ligament transfer, there is still a lack of prospective comparative studies confirm-ing the clinical relevance of these biomechanical findings. Hypothesis: Semitendinosus tendon graft for coracoclavicular ligament reconstruction is associated with superior clinical results compared with a modified Weaver-Dunn procedure in chronic complete Acromioclavicular Joint dislocation. Study Design: Cohort study; Level of evidence, 2. Methods: Twenty-four patients (mean age, 42 years) with painful, chronic Rockwood type III through V Acromioclavicular Joint dislo-cations were subjected to surgical reconstruction. In 12 patients, a modified Weaver-Dunn procedure was performed; in the other 12 patients, autogenous semitendinosus tendon graft was used. Clinical evaluation was performed using the American Shoulder and Elbow Surgeons shoulder score and the Constant score after a mean follow-up time of 37 months. Preoperative and postoperative radiographs were compared. Results: The mean American Shoulder and Elbow Surgeons shoulder score improved from 74 ± 7 points preoperatively to 86 ± 8 points postoperatively in the Weaver-Dunn group, and from 74 ± 4 points to 96 ± 5 points in the semitendinosus tendon grou
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semitendinosus tendon graft versus a modified weaver dunn procedure for Acromioclavicular Joint reconstruction in chronic cases a prospective comparative study
American Journal of Sports Medicine, 2009Co-Authors: Mark Tauber, Katharina Gordon, Heiko Koller, Herbert ReschAbstract:BackgroundBiomechanical studies comparing various surgical techniques for Acromioclavicular Joint reconstruction have reported that semitendinosus tendon graft for coracoclavicular ligament reconstruction provides a substantial improvement in initial stability and a load-to-failure equivalent to the intact coracoclavicular ligaments. Although it represents a biomechanical improvement compared with coracoacromial ligament transfer, there is still a lack of prospective comparative studies confirming the clinical relevance of these biomechanical findings.HypothesisSemitendinosus tendon graft for coracoclavicular ligament reconstruction is associated with superior clinical results compared with a modified Weaver-Dunn procedure in chronic complete Acromioclavicular Joint dislocation.Study DesignCohort study; Level of evidence, 2.MethodsTwenty-four patients (mean age, 42 years) with painful, chronic Rockwood type III through V Acromioclavicular Joint dislocations were subjected to surgical reconstruction. In 12...
Herbert Resch - One of the best experts on this subject based on the ideXlab platform.
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Resch H: Semitendinosus tendon graft versus a modified Weaver-Dunn procedure for Acromioclavicular Joint reconstruction in chronic cases: a prospective comparative study
2016Co-Authors: Mark Tauber, Michael Fox, Herbert ReschAbstract:Background: Biomechanical studies comparing various surgical techniques for Acromioclavicular Joint reconstruction have reported that semitendinosus tendon graft for coracoclavicular ligament reconstruction provides a substantial improvement in initial stability and a load-to-failure equivalent to the intact coracoclavicular ligaments. Although it represents a biomechanical improvement compared with coracoacromial ligament transfer, there is still a lack of prospective comparative studies confirm-ing the clinical relevance of these biomechanical findings. Hypothesis: Semitendinosus tendon graft for coracoclavicular ligament reconstruction is associated with superior clinical results compared with a modified Weaver-Dunn procedure in chronic complete Acromioclavicular Joint dislocation. Study Design: Cohort study; Level of evidence, 2. Methods: Twenty-four patients (mean age, 42 years) with painful, chronic Rockwood type III through V Acromioclavicular Joint dislo-cations were subjected to surgical reconstruction. In 12 patients, a modified Weaver-Dunn procedure was performed; in the other 12 patients, autogenous semitendinosus tendon graft was used. Clinical evaluation was performed using the American Shoulder and Elbow Surgeons shoulder score and the Constant score after a mean follow-up time of 37 months. Preoperative and postoperative radiographs were compared. Results: The mean American Shoulder and Elbow Surgeons shoulder score improved from 74 ± 7 points preoperatively to 86 ± 8 points postoperatively in the Weaver-Dunn group, and from 74 ± 4 points to 96 ± 5 points in the semitendinosus tendon grou
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semitendinosus tendon graft versus a modified weaver dunn procedure for Acromioclavicular Joint reconstruction in chronic cases a prospective comparative study
American Journal of Sports Medicine, 2009Co-Authors: Mark Tauber, Katharina Gordon, Heiko Koller, Herbert ReschAbstract:BackgroundBiomechanical studies comparing various surgical techniques for Acromioclavicular Joint reconstruction have reported that semitendinosus tendon graft for coracoclavicular ligament reconstruction provides a substantial improvement in initial stability and a load-to-failure equivalent to the intact coracoclavicular ligaments. Although it represents a biomechanical improvement compared with coracoacromial ligament transfer, there is still a lack of prospective comparative studies confirming the clinical relevance of these biomechanical findings.HypothesisSemitendinosus tendon graft for coracoclavicular ligament reconstruction is associated with superior clinical results compared with a modified Weaver-Dunn procedure in chronic complete Acromioclavicular Joint dislocation.Study DesignCohort study; Level of evidence, 2.MethodsTwenty-four patients (mean age, 42 years) with painful, chronic Rockwood type III through V Acromioclavicular Joint dislocations were subjected to surgical reconstruction. In 12...
Peter Hidas - One of the best experts on this subject based on the ideXlab platform.
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surgical treatment of chronic Acromioclavicular Joint dislocation by modified weaver dunn procedure
Knee Surgery Sports Traumatology Arthroscopy, 2001Co-Authors: Attila Pavlik, Dezso Csepai, Peter HidasAbstract:We present our technique for surgically treating Tossy III Acromioclavicular Joint dislocation, discuss the indications for various procedures, and evaluate our postoperative results. We operated on 17 patients suffering from chronic Acromioclavicular instability after such dislocation using a modified Weaver-Dunn procedure, in which there is no lateral clavicular end resection, the coracoacromial ligament graft is sutured to the inferior part of the clavicle by transosseal sutures, and a Bosworth coracoclavicular screw is used to protect the graft postoperatively for 8 weeks. After a mean of 37 months we evaluated shoulder function by the Constant score and the subjective and radiological results. Mean Constant score was 91.9% (74–100%); it was 80–90% in 5 patients and above 90% in 11. One patient had screw loosing after the operation and suffered partial loss of reduction and discomfort during shoulder loading. All patients but one returned to work, and all but one have returned to their preoperative activity at the same level. Subjectively, there were 11 excellent and 6 good results. Compared to the contralateral uninjured side, radiography showed anatomical reposition in the vertical plane in 9 cases, slight loss of reduction in 6 (difference in the distance between the inferior border of the acromion and the clavicle is 2–4 mm), and partial loss of reduction in 2 (4–8 mm). We recommend the modified Weaver-Dunn procedure for surgical treatment of chronic, Tossy grade III Acromioclavicular Joint dislocations as it provides good functional and subjective results. Our modification is indicated mainly for young patients because posttraumatic arthrosis occurs more frequently in elderly patients, making clavicular end resection necessary.
Paula M Ludewig - One of the best experts on this subject based on the ideXlab platform.
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kinematic evaluation of the modified weaver dunn Acromioclavicular Joint reconstruction
American Journal of Sports Medicine, 2008Co-Authors: Robert F Laprade, Daren Wickum, Chad J Griffith, Paula M LudewigAbstract:Background:Few reconstructive methods to treat displaced Acromioclavicular separations have been evaluated using kinematic data.Hypothesis:The modified Weaver-Dunn reconstruction restores intact Acromioclavicular Joint motion during passive scapular plane abduction.Study Design:Controlled laboratory study.Methods:Acromioclavicular Joint motion was recorded during passive humeral elevation in 3 states: an intact shoulder, an “injured” state in which the Acromioclavicular and coracoclavicular ligaments were transected, and finally in a reconstructed state using a modified Weaver-Dunn reconstruction. Measurements were taken with an electromagnetic motion analysis system attached to rigid pins placed in the clavicle, scapula, humerus, and sternum during passive scapular plane humeral elevation.Results:Total translatory motion of the Acromioclavicular Joint in the cut state was significantly greater than both the intact and reconstructed states in the medial/lateral (intact, 4.3 mm; cut, 7.9 mm; reconstructed,...
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three dimensional Acromioclavicular Joint motions during elevation of the arm
Journal of Orthopaedic & Sports Physical Therapy, 2008Co-Authors: Rachael M Teece, Jason B Lunden, Angela S Lloyd, Andrew P Kaiser, Cort J Cieminski, Paula M LudewigAbstract:Study Design Descriptive laboratory study. Objectives To determine the 3-dimensional motions occurring between the scapula relative to the clavicle at the Acromioclavicular Joint during humeral elevation in the scapular plane. Background Shoulder pathology is commonly treated through exercise programs aimed at correcting scapular motion abnormalities. However, little is known regarding how Acromioclavicular Joint motions contribute to normal and abnormal scapulothoracic motion. Methods and Measures Thirty subjects (16 males, 14 females) participated. Subjects with positive symptoms on clinical exam or past history of shoulder pathology, trauma, or surgery were excluded. Electromagnetic surface motion analysis was performed tracking the thorax, clavicle, scapula, and humerus. Subjects performed 3 repetitions of scapular plane abduction. Passive motion data were also collected for scapular plane abduction from cadaver specimens. Data were analyzed using within-session reliability and descriptive statistics ...
Richard E Debski - One of the best experts on this subject based on the ideXlab platform.
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biomechanical rationale for development of anatomical reconstructions of coracoclavicular ligaments after complete Acromioclavicular Joint dislocations
American Journal of Sports Medicine, 2004Co-Authors: Ryan S Costic, Joanne E Labriola, Mark W Rodosky, Richard E DebskiAbstract:BackgroundSurgical treatments of complete Acromioclavicular Joint dislocations replace or reconstruct the coracoclavicular ligaments with a single structure and do not account for the anatomical variance of each ligament in the design.PurposeTo evaluate the cyclic behavior and structural properties of an anatomic tendon reconstruction of the coracoclavicular ligament complex after a simulated Acromioclavicular Joint dislocation.Study DesignControlled laboratory study.MethodsCyclic loading followed by a load-to-failure protocol (simulated dislocation) of the normal coracoclavicular ligament complex was performed and repeated after an anatomic reconstruction on the same specimen (n = 9). The anatomical reconstruction consisted of a semitendinosus tendon that replicated the direction and orientation of both the trapezoid and conoid ligaments.ResultsThe coracoclavicular ligament and anatomical reconstruction complexes had clinically insignificant (<3 mm) permanent elongation after cyclic loading. The stiffnes...
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effect of capsular injury on Acromioclavicular Joint mechanics
Journal of Bone and Joint Surgery American Volume, 2001Co-Authors: Richard E Debski, I M Parsons, Savio L C WooAbstract:Background:Traumatic disruption of the Acromioclavicular Joint capsule is associated with pain and instability after the injury and may lead to degenerative Joint disease. The objective of this study was to quantify the effect of transection of the Acromioclavicular Joint capsule on the kinematics a
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functional evaluation of the ligaments at the Acromioclavicular Joint during anteroposterior and superoinferior translation
American Journal of Sports Medicine, 1997Co-Authors: Kwang Won Lee, Richard E Debski, Chih Hwa Chen, Savio L C WooAbstract:We examined the anatomy and measured the in situ force in ligaments at the Acromioclavicular Joint using a universal force-moment sensor. The in situ force in the coracoacromial, conoid, trapezoid, superior Acromioclavicular capsular, and inferior Acromioclavicular capsular ligaments of 10 fresh-frozen cadaveric shoulders was determined for a load of 70 N applied to the clavicle in anteroposterior and superoinferior directions. The lengths of the conoid and trapezoid ligaments were found to be 15.1 +/- 4.1 and 11.5 +/- 2.2 mm, respectively; the widths of the conoid and trapezoid ligaments were 10.7 +/- 1.5 and 11.0 +/- 2.8 mm, respectively. The in situ force of the trapezoid (42.9 +/- 15.4 N) was significantly greater than that for the other ligaments during posterior displacement. Otherwise, no statistically significant differences could be found between any of the in situ forces in each ligament during all other motions examined. During anterior displacement, the inferior Acromioclavicular capsular ligament appeared to be the major restraint. The trapezoid ligament was the primary restraint during posterior displacement and provided 55.8% +/- 20.0% of the resisting force. Our results suggest that the coracoclavicular and other Acromioclavicular Joint capsular ligaments should be considered for reconstruction to restore normal Joint function, especially in the anterior, posterior, and superior directions.
