A5058680644- Shoulder Injury and Treatment
- Shoulder and Clavicle Injuries
- Nerve Injury and Rehabilitation
- Orthopedic Surgery and Rehabilitation
- Elbow and Forearm Trauma Treatment
- Knee injuries and reconstruction techniques
- Total Knee Arthroplasty Outcomes
- Lower Extremity Biomechanics and Pathologies
- Sports injuries and prevention
- Trauma Management and Diagnosis
- Orthopaedic implants and arthroplasty
- Cardiovascular Syncope and Autonomic Disorders
- Bone fractures and treatments
- Spine and Intervertebral Disc Pathology
- Tendon Structure and Treatment
- Foot and Ankle Surgery
- Cardiac Arrhythmias and Treatments
- Hip disorders and treatments
- Musculoskeletal pain and rehabilitation
- Cardiac Valve Diseases and Treatments
- Spinal Fractures and Fixation Techniques
- Pelvic and Acetabular Injuries
- Musculoskeletal synovial abnormalities and treatments
- Sports Performance and Training
- Osteoarthritis Treatment and Mechanisms
Orthopaedic Research Foundation
2018-2025
The Medical Foundation
2025
VA Long Beach Healthcare System
2011-2023
University of California, Irvine
2013-2022
Stryker (United States)
2022
Princeton University
2022
Cornell University
2022
Pasadena City College
2019-2020
Tibor Rubin VA Medical Center
2017-2019
Yokohama Minami Kyosai Hospital
2018
Background: There have been many clinical reports of patch graft surgery for irreparable rotator cuff tears. However, the retear rate is relatively high because lack superior stability, causing subacromial abrasions. Purpose: To compare stability among 3 types grafting simulated Study Design: Controlled laboratory study. Methods: Eight cadaveric shoulders were tested in a custom shoulder testing system. Superior translation humerus, contact pressure, and glenohumeral joint force quantified...
Reestablishment of the native footprint during rotator cuff repair has been suggested as an important criterion for optimizing healing potential and fixation strength.A double-row will demonstrate superior biomechanical properties compared with a single-row repair.Controlled laboratory study.In 9 matched pairs fresh-frozen cadaveric shoulders, supraspinatus tendon from 1 shoulder was repaired suture anchor technique: 2 medial anchors horizontal mattress sutures lateral simple sutures. The...
Background: Patients with irreparable rotator cuff tears have a defect of the superior capsule, which creates discontinuity shoulder capsule in transverse direction (anterior-posterior direction). This effect is one causes underlying instability after tears. Purpose/Hypothesis: The purpose this study was to assess effects anterior and posterior continuity on biomechanics reconstruction (SCR). hypothesis that capsular would improve glenohumeral stability SCR. Study Design: Controlled...
Patients with pseudoparalysis and irreparable rotator cuff tears have very poor function. The authors developed a superior capsule reconstruction (SCR) technique for that restores shoulder stability muscle balance, improving function relieving pain.To evaluate whether arthroscopic SCR reversed preoperative in patients tears.Case series; Level of evidence, 4.One hundred consecutive underwent fascia lata autografts; 7 deltoid weakness from cervical or axillary nerve palsy 5 severe presurgical...
Although sports participation and heavy physical work can contribute to rotator cuff tears, many patients expect return these activities after surgery; however, irreparable tears preclude this outcome. A new surgical treatment-arthroscopic superior capsule reconstruction (SCR)-restores shoulder stability muscle balance in with tears; consequently, it improves function relieves pain.To evaluate the rates of among treated arthroscopic SCR.Cohort study; Level evidence, 3.From 2007 2014, we...
Background: Arthroscopic superior capsule reconstruction was developed to restore stability, muscle balance, and function in the shoulder joint after an irreparable rotator cuff tear. Our objective assess functional radiographic results of 5 years follow-up. Methods: Thirty patients who underwent arthroscopic using fascia lata autograft were enrolled this study. The inclusion criteria tear confirmed by arthroscopy postoperative Shoulder range motion, American Elbow Surgeons (ASES) Japanese...
Background: Short-term follow-up studies have reported favorable clinical outcomes after arthroscopic superior capsule reconstruction (SCR) for irreparable rotator cuff tears. Purpose: To assess whether these positive are maintained long-term and tear arthropathy worsens over time fascia lata autograft SCR. Study Design: Case series; Level of evidence, 4. Methods: This study analyzed data collected prospectively from 34 consecutive patients (36 affected shoulders) with tears who underwent...
Techniques for ulnar collateral ligament reconstruction have evolved.Ulnar with interference screw fixation restores elbow kinematics and failure strength to that of the native ligament.Controlled laboratory study.Of 10 matched pairs cadaveric elbows, one underwent kinematic testing under conditions an intact, released, reconstructed ligament. Single 5-mm diameter bone tunnels were created at isometric anatomic insertion sites on medial epicondyle sublime tubercle. Graft was achieved 5 x 15...
Background: It has been speculated that a shift of the throwing arc commonly develops in athletes who perform overhead activities, resulting greater external rotation and decreased internal caused by anterior capsular laxity posterior contracture, respectively. Osseous adaptation form increased humeral glenoid retroversion may provide protective function asymptomatic athlete but cannot explain pathological changes seen shoulder athlete. Therefore, objective present study was to examine...
Patellofemoral contact pressures resulting from fixed rotational deformities of the femur were studied in human cadaver knees. The increase degree results a nonlinear patellofemoral on contralateral facets patella (i.e., external deformity resulted pressure medial facet, and internal lateral facet patella). With initial isometric tension 200 N quadriceps tendon for 30 degrees, 60 90 120 degrees knee flexion, peak showed no significant differences between its anatomic position. At 20 femur,...
Patellofemoral pain is associated with patellar malalignment and quadriceps weakness which are seen more commonly in women. The objective of the current study was to determine effects gender, vastus medialis strength, tibial rotation on patellofemoral joint biomechanics. Twelve fresh-frozen knees from cadavers were tested using a custom knee jig. Anatomic multiplane loading extensor mechanism used varying loads. contact area pressure measured sensitive film at flexion angles 0 degrees, 30 60...
Detachment of a tendon from its osseous insertion, as can be the case with severe rotator cuff injuries, leads to atrophy and increased fat in corresponding muscle. We sought validate injury model rabbit test hypothesis that tenotomy would consistently create muscle fatty degeneration analogous changes occur after nerve innervating same muscle.New Zealand white rabbits were divided into three groups: (1) partial tear without retraction muscle, (2) complete (3) transection subscapular nerve....
Background: Acromioplasty is increasingly being performed for both reparable and irreparable rotator cuff tears. However, acromioplasty may destroy the coracoacromial arch, including ligament, consequently causing a deterioration in superior stability even after capsule reconstruction. Purpose/Hypothesis: The purpose of this study was to investigate effects on shoulder biomechanics reconstruction supraspinatus tendon hypothesis that with would decrease area subacromial impingement without...