Reverse shoulder arthroplasty as a salvage procedure for failed conventional shoulder replacement due to cuff failure--midterm results.

Our goal was to evaluate the objective and subjective midterm outcome after revision of a failed shoulder arthroplasty with a reverse design prosthesis. Twenty consecutive patients with 21 revisions of a primary shoulder arthroplasty using reverse shoulder prosthesis Delta III(®) were followed up postoperatively for a mean of 46 months including clinical and radiological examination. Complications were recorded and Constant score, DASH and SF36 were assessed. With the numbers given a significant reduction of pain was achieved from 8.7 to 3.0 (p < 0.001). There was a significant improvement of active flexion from 43° to 97° (p < 0.001) and active abduction from 44° to 90° (p < 0.001). However, at the same time, active external rotation with an adducted humerus decreased significantly from 26° to 12° (p = 0.012). The constant score improved significantly from 16.7 to 55.9 (p < 0.001). Sixteen patients (84%) rated their shoulder better or much better than before. In 43% an intraoperative and in 38% a postoperative complication occurred including two late stage infections which required prosthesis removal. Our results support the use of the reverse prosthesis as revision prosthesis. The reverse design helps to compensate functional deficits due to severe soft-tissue damage except active external rotation. Nevertheless, the revision is a technically demanding procedure reflected in a high rate of intraoperative complications. The rate of secondary infections of 10% remains a special concern.

Biomechanical testing of rectangular humeral shaft prosthesis: higher torsional stability without increased fracture risk.

BACKGROUND: Rectangular cementless femur shaft prostheses have a higher primary stability than round shafts. A novel rectangular humeral shaft design was tested with two questions: does the rectangular design cause a higher fracture risk during implantation than round designs, and does it increase the torsional stiffness? MATERIALS AND METHODS: Two series with six paired human humeri (total 24) were tested on one side with the rectangular shaft and on the contralateral side with a round shaft. In the first series, the shaft implantation was carried out with a constant speed of 100 mm/min and the maximum force was measured when the fracture occurred. In the second series, the implants were preloaded with 50 N and then rotated at 2° per second with monitoring of the torsional torque. RESULTS: The maximum force at fracture showed no significant difference for the two designs (p = 0.34). Higher age and low bone density reduced the force required for fracture. The rectangular shaft showed significant higher torsional moments (p < 0.05). CONCLUSIONS: In biomechanical testing, the rectangular shaft had a significantly higher primary torsional stability than the round shaft without a higher risk of fracture during cementless implantation. Fracture risk and torsional stability are influenced by age and bone density.

Short-term results after reversed shoulder arthroplasty (Delta III) in patients with rheumatoid arthritis and irreparable rotator cuff tear.

The purpose of this study was to describe the outcome after reversed Delta III shoulder prosthesis in patients with rheumatoid arthritis (RA) and irreparable rotator cuff tear. Fifteen patients (17 joints) were prospectively analysed using the Constant-Murley score (CS). Comprehensive outcome measure was carried out by means of four widely used questionnaires as well as clinical and radiographic examinations at an average of 24.3 months postoperatively. The CS improved significantly from 19 to 59.5 points. The mental (MSC) and physical (PCS) component summary score of the Short Form 36 (SF-36) reached 108% and 77%, respectively, while the DASH (Disabilities of the Arm, Shoulder, and Hand) was 58% of a comparative norm population. Remaining deficits were documented by SPADI (Shoulder Pain and Disability; 54.4 points) and ASES (clinical and patient-orientated American Shoulder and Elbow Surgeons; 84.3 and 61.3 points, respectively). No radiological signs of loosening were found, but scapular notching occurred in four cases. Reversed arthroplasty provides a substantial improvement of shoulder function in patients with RA. The high incidence of notching is of concern.

[In situ assembly of a modular noncemented total shoulder prosthesis for the reconstruction of complex joint pathology]. / In-situ-Montage einer modularen, nichtzementierten Schulterprothese zur Wiederherstellung komplexer Schulteranatomie.

OBJECTIVE: Exact restoration of the glenohumeral joint, especially in the case of complex pathologies, due to high prosthesis modularity and in situ assembly; later conversion to inverse design with same shaft possible. INDICATIONS: Primary shoulder osteoarthritis, secondary joint destruction after previous fracture or its treatment, humeral head necrosis, or inflammatory processes, revisions of defect situations such as hemiprostheses. CONTRAINDICATIONS: General contraindications of total shoulder arthroplasty, additionally, functional loss of the rotator cuff, advanced osteoporosis, narrow medullary canal, e.g., in patients with juvenile rheumatoid arthritis. SURGICAL TECHNIQUE: After deltopectoral approach free resection of the humeral head along landmarks, stepwise rasping of the humeral medullary canal, insertion of the rectangled stem, realignment of humeral height with the body, realignment of inclination and possible retroversion with the inclination set. The asymmetric head ensures exact restoration of the joint center. Implantation of the cemented glenoid, test of range of motion and soft-tissue tension, and exchange of components in situ, if necessary. RESULTS: A prospective evaluation of the first 146 consecutive patients with 1-year follow-up revealed significant improvements of about 151% regarding pain and of about 98% in function without significant differences between different indications. Four shaft fissures were observed and treated with intraoperative cerclages during the learning period. No further fissures were noted after adaptation of the surgical procedure and subsequent guidelines. One traumatic and one atraumatic head rotation were observed but should be prevented with a new torque wrench. Similar functional results can be achieved even in complex shoulder pathologies due to the high modularity of the prosthesis.

Arthroscopic and open options for surgical treatment of chondromatosis of the elbow.

PURPOSE: The purpose of this study was to evaluate the treatment-specific outcome of surgical therapy of chondromatosis of the elbow with special attention on the complication and recurrence rate as well as induction of secondary osteoarthritis. METHODS: A consecutive patient group from 1989 to 2003 was evaluated retrospectively and followed up clinically and radiologically. Special attention was paid to locking and catching, swelling, pain, loose bodies, and signs of osteoarthritis. In the case of a causal pathology, mostly osteoarthritis, the condition was classified as secondary; otherwise, it was classified as primary. The following scores were calculated: modified American Shoulder and Elbow Surgeons questionnaire for elbows; Disabilities of the Arm, Shoulder and Hand questionnaire; and Short Form 36. RESULTS: Of 24 patients operated on, 19 (79%) were followed up after 56 months (range, 11 to 177 months). Of these, 10 were primary types and 9 secondary types. The extension deficit of 12 degrees preoperatively decreased to -9 degrees , and pain was significantly (P = .001) reduced. Postoperatively, 1 patient still reported occasional locking and 1 patient had swelling. In both patients no loose bodies could be identified by radiography. Comparison of the arthroscopic and open techniques showed a trend toward a shorter rehabilitation time of 2.4 months after arthroscopic intervention, in contrast to 4.6 months for an open procedure, and a trend toward higher patient satisfaction after arthroscopy. Comparison of the primary and secondary forms showed significantly (P = .042) better pain reduction for primary chondromatosis. Of the patients with distinct preoperative osteoarthritis, 44% showed ongoing osteophytic growth; there were no cases of new osteoarthritis. CONCLUSIONS: Both open and arthroscopic approaches give satisfactory results with a trend toward shorter rehabilitation and higher patient satisfaction for the arthroscopic approach. Osteoarthritis is not induced and there is no danger of recurrence in the medium term. LEVEL OF EVIDENCE: Level III, therapeutic, retrospective comparative study.

Usefulness of concomitant biceps tenodesis in total shoulder arthroplasty: a prospective cohort study.

The purpose of this report is to assess the association of concomitant biceps tenodesis in total shoulder arthroplasty with treatment success 1 year after total shoulder arthroplasty. Of 136 consecutive shoulders (124 patients) undergoing primary total shoulder arthroplasty between 2003 and 2006, 54 (39.7%) underwent biceps tenodesis. For each patient, we obtained potential preoperative confounding data, such as age; gender; presence of rheumatoid arthritis; Short Form 36; number of previous shoulder operations; Disabilities of the Arm, Shoulder and Hand score; Shoulder Pain and Disability Index score; and insurance status. At the 1-year follow-up, we calculated the Constant score of all patients (ranging from 0 [worst] to 100 [best]). We first determined the crude association of concomitant biceps tenodesis with 1-year treatment success (Constant score > or =80) and then fitted a multivariate model correcting for potential confounders to assess the adjusted association of the biceps tenodesis on treatment success. The total number of treatment successes was 46 of 136 shoulders (33.8% of all prosthesis implantations). The crude association (odds ratio) of a concomitant biceps tenodesis with treatment success was 2.38 (95% confidence interval [CI] 1.15 to 4.93; P = .02). When adjusting for potential confounders, we found that this association slightly increased to 2.97 (95% CI 1.00 to 8.85; P = .05). Concomitant biceps tenodesis appears to have a favorable effect on 1-year treatment success after total shoulder arthroplasty.

Does Weber's rotation osteotomy induce degenerative joint disease at the shoulder in the long term?

Weber's internal rotation osteotomy of the humeral head is recommended for the treatment of anteroinferior shoulder instability with a large Hill-Sachs defect. The observation of severe joint degeneration in the course of long-term follow-up provided the motivation for this study. An osteotomy was performed in 42 patients from 1984 to 1990. Thirty-four patients were available for clinical and radiological follow-up after 14.5 years. Our own CT-based classification was applied to categorize the degree of osteoarthritis. A shoulder prosthesis was implanted in 9 patients (26%). Only 3 patients (9%) did not show any signs of degeneration. A statistically significant relationship was found between increased internal rotation of the humeral head and disease severity (P = .03). A lower incidence of joint degeneration (P = .02) was found for patients with generalized ligamentous laxity. We therefore recommend this osteotomy only as a salvage procedure whereby the internal rotation of the humeral head should not exceed 20 degrees .

Rupture of the subscapularis tendon (isolated or in combination with supraspinatus tear): when is a repair indicated?

Ruptures of the subscapularis tendon, isolated or combined, are rare, and the treatment modalities are controversial. Of 1345 patients who underwent rotator cuff repair in a 7-year period, 73 had either an isolated rupture of the subscapularis or a subscapularis rupture combined with rupture of the supraspinatus. All reconstructions were performed through a deltopectoral approach. Reinsertion of the subscapularis was combined with reconstruction of the supraspinatus in 32 patients. Of the patients, 63 (86%) were re-examined at a mean follow-up of 35 months. The modified Constant score improved from 62% preoperatively to 91% at follow-up. Isolated or combined reconstructions did not result in significant differences with respect to the Constant score. Of the patients, 62 (98%) were satisfied with the operation. Rerupture was found by ultrasound in 8 subscapularis tendons (13%) and 4 supraspinatus tendons (13%). The rerupture rate showed a significant correlation with the Goutallier stage of fatty degeneration and the interval between injury and operation.

Sports activity after anatomical total shoulder arthroplasty.

BACKGROUND: Implant functionality has clearly increased over the past decades because of improvements in total shoulder arthroplasty systems. This means that prostheses are now being implanted in younger patients with high sports activity. HYPOTHESIS: The implantation of the total shoulder arthroplasty does not mainly influence the sports activity. STUDY DESIGN: Case series; Level of evidence, 4. METHODS: One hundred consecutive patients with unilateral total shoulder arthroplasty, followed for at least 1 year, were included in the study. Assessment preoperatively and 1 year and 2 years after operation included clinical examination and a validated questionnaire (Constant, Shoulder Pain and Disability Index [SPADI], and Disabilities of the Arm, Shoulder and Hand [DASH] scores, and the Short Form 36 [SF-36]). In addition, all patients received a sports questionnaire developed in house. RESULTS: Of the 55 patients who took part in sports before having shoulder disease, 49 (89%) were still able to participate after a mean follow-up of 2.8 years (range, 1.3-4.6 years). Seventeen patients had given up sports before total shoulder arthroplasty; 11 of them resumed activities after joint replacement but 6 did not start again. No patient had to stop sports because of the total shoulder arthroplasty. The sports most commonly mentioned were swimming (10 patients [20.4%]), golf (8 patients [16.3%]), cycling (8 patients [16.3%]), and fitness training (8 patients [16.3%]). Strength and range of motion, as well as the physical component summary (PCS) of the SF-36 and the Constant score (CS) after total shoulder arthroplasty, were significantly better in the sports group (49 of 100; PCS = 46, CS = 77) than in the nonsports group (45 of 100; PCS = 41,CS = 71). Eighteen patients (36.7%) stated that even after joint replacement, they still suffered restrictions on their sports activities because of shoulder problems. Whereas the overall mean age at follow-up was 68.9 years (range, 26-92 years), the mean age of patients participating in sports was significantly lower than in the nonsports group (63 vs 70 years; P = .002). CONCLUSION: Total shoulder arthroplasty allows patients to participate in sports without significant restriction of their level of activity. The probability of being able to do sports postoperatively-if done preoperatively-is high. Long-term studies are needed to determine whether the greater loading on the joint will lead to more rapid wear and a higher rate of loosening with time.