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Biomedical subjects

Joseph A Abboud

Publications and source records attributed to Joseph A Abboud.

16 recordsLinked to original sources
PubMed2026

The impact of an intact rotator cuff on the outcomes of reverse shoulder arthroplasty: a meta-analysis of 20,924 patients.

BACKGROUND: While reverse shoulder arthroplasty (rTSA) is commonly utilized for rotator cuff tear arthropathy, indications have expanded to include, primary glenohumeral osteoarthritis (GHOA) with intact cuff. The presence of an intact cuff may influence outcomes after rTSA because preserved cuff musculature can contribute to shoulder stability and force which could potentially improve postoperative function and reduce complication rates. However, studies have reported contradictory results on whether or not an intact cuff would provide better outcomes in patients receiving an rTSA. METHODS: This is a systematic review and Meta-analysis performed according the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. PubMed, Cochrane, Embase, and Google Scholar (pages 1-20) were queried through December 2025. Inclusion criteria consisted of studies comparing the outcomes of rTSA based on whether patients had a diagnosis of GHOA with intact cuff, or had a deficient rotator cuff (ie had a diagnosis of rotator cuff tears without OA, or cuff tear arthropathy). Extracted data included adverse events, improvement in patient reported outcome measures, and improvement in range of motion. RESULTS: Eleven retrospective articles and 1 prospective article met the inclusion criteria with 4,542 in the GHOA with intact cuff group and 16,382 in the cuff-deficient group (cuff tear arthropathy: 15,423 patients; rotator cuff tear: 959 patients). Patients undergoing rTSA for GHOA and intact cuff had a lower rate of revisions (odds ratio [OR] = 0.53; 95% CI: 0.41- 0.68, P < .001; I2 = 0%), overall complications (OR = 0.57; 95% CI: 0.46-0.71, P < .001; I2 = 0%), acromial stress fracture (OR = 0.22; 95% CI: 0.08- 0.59, P = .003; I2 = 0%), infection (OR = 0.43; 95% CI: 0.26- 0.73, P = .002; I2 = 37%), and instability (OR = 0.60; 95% CI: 0.40- 0.90, P = .01; I2 = 0%). In addition, GHOA patients had a better improvement in both American Shoulder and Elbow Surgeons scores (mean difference = 7.17; 95% CI: 2.13- 12.21, P = .005; I2 = 81%) without exceeding the minimal clinically important difference, and external rotation (mean difference = 12.00&#xb0;; 95% CI: 9.63- 14.37, P < .001; I2 = 38%). CONCLUSION: Rotator cuff-deficient patients undergoing rTSA have a higher risk of postoperative complications compared to patients undergoing rTSA for GHOA with an intact cuff. They also showed less improvement in American Shoulder and Elbow Surgeons scores and external rotation. However, the clinical significance of these differences should be interpreted with caution, as not all improvements exceeded established thresholds for clinical importance.

Humans↗
PubMed2006

Arthroscopy effectively treats ganglion cysts of the shoulder.

UNLABELLED: In the hands of an experienced arthroscopist, arthroscopic decompression of a spinoglenoid notch cyst can lead to resolution of a patient's symptoms and complete functional recovery. In our study, we hypothesized that patients with a spinoglenoid notch cyst who were treated arthroscopically would have return to near normal function of their shoulders and that the outcomes for patients with a spinoglenoid notch cyst and associated labral tears would be no different than the outcomes for patients with a spinoglenoid notch cyst without associated labral tears. We retrospectively evaluated 18 consecutive patients who were treated arthroscopically for a spinoglenoid notch cyst. Nine had isolated arthroscopic decompression, and nine arthroscopic decompression with a labral repair. We used the validated American Shoulder and Elbow Society (ASES) and University of Pennsylvania (Penn) shoulder scores to evaluate patients' outcomes. We found improvements in the postoperative ASES and Penn shoulder scores for all outcomes measured including pain, satisfaction, and function. However, there were no differences in outcome when comparing the group that had decompression with the group that had decompression and labral repair for an associated superior labral anterior posterior tear. LEVEL OF EVIDENCE: Therapeutic study, Level III (retrospective cohort study). See the Guidelines for Authors for a complete description of levels of evidence.

Adolescent↗
PubMed2006

Arthroscopic and open Bankart repairs provide similar outcomes.

UNLABELLED: Recurrent instability after arthroscopic Bankart repair has decreased, largely because of improvements in surgical technique. We wanted to know whether there were differences in functional outcomes (using a validated outcomes measure) in patients who had arthroscopic Bankart repair or open Bankart repair for recurrent anterior glenohumeral instability. We retrospectively reviewed 106 patients who had a Bankart repair for recurrent anterior glenohumeral instability from 1998-2001. Of the 93 patients included, 69 patients had arthroscopic Bankart repair and 24 patients had open Bankart repair. The indications for surgery in the two groups were similar. The average age of the patients was 29.9 years (arthroscopic Bankart repair, 31 years; open Bankart repair, 28 years). The followup ranged from 24-77 months. The average modified American Shoulder and Elbow Surgeons score (PENN score) for pain, satisfaction, and function were 26.3, 8.5, and 55.1, respectively, in the arthroscopic Bankart repair group and 26.6, 8.8, and 54.2, respectively, in the open Bankart repair group. The total score was 90 in the arthroscopic Bankart repair group and 89.5 in the open Bankart repair group. Recurrent instability occurred in one patient in each group. We found no difference in outcomes between the arthroscopic and open Bankart repair groups using patient-assessed outcomes. LEVEL OF EVIDENCE: Therapeutic Study, Level III (retrospective comparative study). See the Guidelines for Authors for a complete description of levels of evidence.

Adolescent↗
PubMed2005

Telemedicine consultation for patients with upper extremity disorders is reliable.

UNLABELLED: Telemedicine is a valuable resource for the delivery of health care to patients in underserved areas. The purpose of this study was to assess the reliability of asynchronous teleconsultation in the diagnosis and establishment of treatment plans for patients with disorders of the upper extremity. One hundred patients with disorders of the upper extremity were prospectively evaluated. Initial patient evaluations, done by an independent evaluator, involved a medical history, physical examination, digital images of the patient, and digitized radiographic studies. This patient information was presented electronically to two hand surgeons 6 months after one surgeon independently evaluated the patients in the outpatient clinic. The physicians formulated diagnosis and treatment plans for the patients based on the blinded electronic information. These findings then were compared with the treatment plans made by the physicians at the time of the patients' visits. Telemedicine consultation resulted in excellent agreement within observers (kappa = .92) and between observers (kappa = .86). Telemedicine consultation seems to be a reliable method for diagnosis and establishment of treatment plans in the management of upper extremity disorders. LEVEL OF EVIDENCE: Diagnostic study, Level I-1 (testing of previously developed diagnostic criteria in series of consecutive patients--with universally applied reference gold standard). See the Guidelines for Authors for a complete description of levels of evidence.

Adolescent↗
PubMed2005

Bilateral core decompression for osteonecrosis of the femoral head.

UNLABELLED: Early treatment of osteonecrosis of the femoral head yields better results than late treatment. Because osteonecrosis frequently is bilateral, it often is advisable to treat both hips simultaneously. Core decompression is one of the more common methods of treatment; however the safety of doing simultaneous bilateral core decompression has been questioned. We sought to evaluate the safety and effectiveness of simultaneous bilateral core decompression compared with unilateral core decompression. One hundred ninety-three patients (276 hips) who had core decompression with bone grafting were followed up for 24 to 145 months. One hundred twenty-four procedures were unilateral and 152 were bilateral. Patients were evaluated by change in Harris hip score, radiographic progression, postoperative complications, and conversion to total hip arthroplasty. Total hip arthroplasty was required in 56 of 124 (45%) of hips in the unilateral, and 48 of 152 (32%) of hips in the bilateral group. Postoperative complications were similar. In the unilateral group there were two major and nine minor complications; in the bilateral group there were three major and 10 minor complications. When bilateral core decompression is indicated, it can be done simultaneously on both hips, allowing earlier treatment of the contralateral hip without risk of increased complications and possibly with a better outcome. It requires only one hospitalization and decreases recovery time compared with two separate procedures. Therefore, it provides advantages over procedures that cannot be done simultaneously on both hips. LEVEL OF EVIDENCE: Therapeutic study, Level IV (case series-no common or historical control group). See the Guidelines for Authors for a complete description of levels of evidence.

Adult↗
PubMed2004

Outcomes of total hip arthroplasty are similar for patients with displaced femoral neck fractures and osteoarthritis.

This study attempted to evaluate whether total hip arthroplasty for displaced femoral neck fractures had significantly different outcomes when compared with total hip arthroplasty for osteoarthritis. This is a retrospective study of 60 patients who had total hip arthroplasties between 1997 and 2001. Thirty patients (mean age, 79.7 years) had total hip arthroplasties for displaced femoral neck fractures; 30 patients (mean age, 76.9 years) were treated with total hip arthroplasties for osteoarthritis. The same surgeon used the modified lateral approach for all surgeries. All patients had radiographic assessment, physical examination, and evaluation with the Harris hip score. The mean followup was 38 months. The mean Harris hip score for the 25 patients treated with a total hip arthroplasty for a femoral neck fracture was 81 points; the mean hip score for the 27 patients treated with a total hip arthroplasty for osteoarthritis was 87 points. No statistically significant differences between these groups were observed. Patients who were treated with a total hip arthroplasty for a femoral neck fracture did not have increased perioperative morbidity compared with patients who had a total hip arthroplasty for osteoarthritis. This study suggests that the outcomes for total hip arthroplasties in this consecutive series of patients treated for displaced femoral neck fractures and osteoarthritis are comparable.

Aged↗
PubMed2003

Proximal tibial segmental prosthetic replacement without the use of muscle flaps.

When doing a proximal tibial prosthetic reconstruction, some surgeons think that the subcutaneous location of the proximal tibia necessitates a gastrocnemius muscle flap for closure and function. In this study, 22 patients with bone tumors had proximal tibial segmental prosthetic replacement using direct reattachment of the patellar tendon to the prosthesis without the use of a muscle flap. Two of 19 patients required reoperation in the postoperative period for hematomas. Both were free of infection or other complications at 24 months mean followup. No other wound complications occurred despite initiation of chemotherapy 2 to 3 weeks after surgery in patients with high-grade malignant tumors (15 of 19). The mean followup was 38.6 months (range, 13-99 months). The patients ranged in age from 15 to 74 years (mean, 39 years). The range of motion achieved postoperatively showed a mean of 97 degrees (+/-16.3 degrees). All patients had full passive extension with a mean extensor lag of 7.5 degrees. The mean Musculoskeletal Tumor Society score was 27.6 (+/- 2.0). These results of patients without muscle flaps compare favorably with published results advocating gastrocnemius flaps for the attachment of the patellar tendon to the prosthesis.

Adult↗
PubMed2003

Effect of altered matrix proteins on quasilinear viscoelastic properties in transgenic mouse tail tendons.

Tendons have complex mechanical behaviors that are viscoelastic, nonlinear, and anisotropic. It is widely held that these behaviors are provided for by the tissue's composition and structure. However, little data are available to quantify such structure-function relationships. This study quantified tendon mechanical behaviors, including viscoelasticity and nonlinearity, for groups of mice that were genetically engineered for altered extracellular matrix proteins. Uniaxial tensile stress-relaxation experiments were performed on tail tendon fascicles from the following groups: eight week old decorin knockout, eight week old reduced type I collagen, three week old control, and eight week old control. Data were fit using Fung's quasilinear viscoelastic model, where the model parameters represent the linear viscoelastic and nonlinear elastic response. The viscoelastic properties demonstrated a larger and faster stress relaxation for the decorin knockout and a smaller and slower stress relaxation for the three week control. The elastic parameter, A, in the eight week control group was significantly greater than in the collagen reduction and three week control groups. This study provides quantitative evidence for structure-function relationships in tendon, including the role of proteoglycan in viscoelasticity. Future studies should directly correlate composition and structure with tendon mechanics for the design and evaluation of tissue-engineered constructs or tendon repairs.

Animals↗
PubMed2002

Effect of implant design on the cyclic loading properties of mini suture anchors in carpal bones.

Mini suture anchors are commonly used in hand surgery involving attachment of soft tissue to bone. There are few data on the biomechanical behavior of these implants under physiologic conditions. Commercially available mini anchors were inserted into the carpal bones of fresh-frozen cadaver wrists. Anchors were divided into threaded and pronged types according to design. The anchors were cyclically loaded. Pronged anchors (1.3 and 2.1 mm) failed at a range of 199 to 5,155 cycles. Threaded anchors (2.5 and 2.8 mm) consistently completed 40,000 cycles without failure. Before failure pronged anchors displaced on average 5.1 mm and threaded anchors displaced on average 0.01 mm. The pronged implants failed because of either prong fatigue or fracture; the threaded anchors remained structurally intact. The larger threaded suture anchors seem to have superior biomechanical properties than smaller pronged anchors.

Aged↗
PubMed2002

Interplay of the static and dynamic restraints in glenohumeral instability.

Anterior glenohumeral instability is a common, yet complicated orthopaedic disorder. During the past few years, basic science research has improved the understanding of the glenohumeral joint stabilizing systems. The current authors review new contributions specifically detailing study of the interplay between the static and dynamic restraints. Simulation of the shoulder muscles in a recent study also has manifested the powerful contribution of the joint reaction force to concavity-compression. Continued advances, such as these, will improve the understanding, and allow better outcome, in treatment of glenohumeral instability.

Biomechanical Phenomena↗
PubMedDate not supplied

Total shoulder arthroplasty: glenoid component design.

Although Charles Neer's original glenoid component underwent several modifications, the all-polyethylene, keeled component with a radius of curvature that conformed to the humeral radius of curvature and that was implanted with cement became the glenoid implant of choice. Neer reported approximately a 30% incidence of radiolucent lines; however, only 2 of 615 glenoids were revised for loosening. Other surgeons have reported radiolucent lines in up to 90% of glenoid components and have correlated symptoms with increasing radiolucencies. This has led to the development of alternative glenoid components for unconstrained total shoulder arthroplasty. Variations in component design include component shape, articular conformity, method of fixation, and material composition. The purposes of this presentation are to review the performance of the original Neer design, as well as other more recent glenoid designs, to identify factors that may influence the performance of glenoid components, and to provide a rationale for future changes in glenoid component design.

Arthroplasty, Replacement↗
PubMedDate not supplied

Surgical treatment of os acromiale with and without associated rotator cuff tears.

Nineteen consecutive patients treated surgically for meso-os acromiale and subacromial pathology were reviewed retrospectively, with a mean length of follow-up of 40 months (range, 24-94 months). Of the patients, 11 (58%) were treated with acromioplasty in the presence of a stable os acromiale; 8 patients (42%) underwent open reduction-internal fixation for an unstable and painful os fragment. Of the 19 patients, 8 (42%) with an os acromiale had an associated full-thickness rotator cuff tear. Overall, only 10 of 19 patients (53%) achieved a satisfactory result. All 8 patients (100%) treated with open reduction-internal fixation achieved union of the os fragment, although only 3 (37.5%) achieved a satisfactory result. Of the 11 patients who underwent acromioplasty, only 7 (64%) achieved a satisfactory result. The outcome of surgical management of symptomatic meso-os acromiale with concomitant rotator cuff pathology was satisfactory in 4 of 8 patients in our study group. The rate of satisfactory results was similar in patients with (50%) and without (55%) associated rotator cuff tears. When we analyzed our results to exclude workers' compensation patients, 80% achieved satisfactory results (compared with only 22% in our workers' compensation group).

Acromion↗
PubMedDate not supplied

Metacarpophalangeal joint arthroplasty in rheumatoid arthritis.

Although metacarpophalangeal joint arthroplasty is occasionally performed for joints affected by osteoarthritis, it is most often done in patients with rheumatoid arthritis. The metacarpophalangeal joint is critical for proper finger function but is the most common site of involvement in the rheumatoid hand. A thorough understanding of the anatomy, pathophysiology, and mechanics of the metacarpophalangeal joint is a prerequisite for the evaluation and treatment of patients requiring metacarpophalangeal arthroplasty. Silicone rubber implants are the most frequently used device for treatment of revised metacarpophalangeal arthroplasty. Follow-up studies show that this surgery improves function and deformity and achieves nearly uniform patient satisfaction.

Arthritis, Rheumatoid↗