A5003645258- 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
- Sports injuries and prevention
- Trauma Management and Diagnosis
- Orthopaedic implants and arthroplasty
- Cardiac Arrhythmias and Treatments
- Bone fractures and treatments
- Lower Extremity Biomechanics and Pathologies
- Cardiovascular Syncope and Autonomic Disorders
- Peripheral Nerve Disorders
- Reproductive Biology and Fertility
- Pluripotent Stem Cells Research
- Hip disorders and treatments
- Cardiac Valve Diseases and Treatments
- Congenital limb and hand anomalies
- Renal and related cancers
- Foot and Ankle Surgery
- Musculoskeletal pain and rehabilitation
- Musculoskeletal synovial abnormalities and treatments
- Surgical Sutures and Adhesives
Orthopaedic Research Foundation
2019-2025
The Medical Foundation
2025
Baekseok University
2024
VA Long Beach Healthcare System
2011-2023
Osaka University of Pharmaceutical Sciences
2023
University of California, Irvine
2010-2022
Stryker (United States)
2022
Princeton University
2022
Cornell University
2022
Tibor Rubin VA Medical Center
2017-2019
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...
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...
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...
A general consensus has been formed that glenoid bone loss greater than 20% to 25% is the critical amount at which bony augmentation procedures are needed; however, recent clinical results suggest levels must be reconsidered lower values.This study aimed find value of anterior when a soft tissue repair not adequate restore anterior-inferior glenohumeral translation, rotational range motion, or humeral head position using biomechanical shoulder instability model.Controlled laboratory...
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...
Background The quantitative relationship between increased anterior shoulder laxity and humeral external rotation observed in throwers remains unclear. Hypothesis An elongated capsule, especially the band of inferior glenohumeral ligament, produced by excessive will result rotation. Study Design Controlled laboratory study. Methods Seven cadaveric shoulders were tested to measure rotational range motion, translations, length ligament. Data collected for intact after nondestructive stretching...
Background The objective of this study was to determine the effects increased horizontal abduction with maximum external rotation, as occurs during late cocking phase throwing motion, on shoulder internal impingement. Hypothesis An increase in glenohumeral will cause overlap rotator cuff insertion respect glenoid and pressure between supraspinatus infraspinatus tendon insertions greater tuberosity glenoid. Study Design Controlled laboratory study. Methods Eight cadaveric shoulders were...
Background: It is unknown at which stage of rotator cuff tear the biomechanical environment altered. The purpose this study was to determine if a critical exists that alters glenohumeral joint biomechanics throughout rotational range shoulder motion, and evaluate effect parascapular muscle-loading. Methods: Eight cadaver shoulders were used with custom testing system. Four progressive stages investigated on basis footprint anatomy. Three muscle-loading conditions examined: only; deltoid...
Background: Although deviations in scapular orientation are thought to predispose shoulder injuries throwing athletes, the biomechanical mechanism underlying athletes with an altered remains unclear. Methods: Seven fresh-frozen cadaveric shoulders were evaluated at 90° of abduction, humerus externally rotated from maximum angle, simulate late cocking phase motion. Loads applied deltoid, pectoralis major, latissimus dorsi, teres and all rotator cuff muscles. Contact pressure glenohumeral...
Objectives: This biomechanical study compares the effectiveness of dual-plate (DP) and plate-nail (PN) constructs for fixation supracondylar distal femur fractures in synthetic cadaveric specimens. Methods: Twenty-four osteoporotic femurs were used to compare 4 an extra-articular, fracture gap model (OTA/AO type 33-A3). Constructs included: (1) lateral femoral locking plate (DLFLP), (2) retrograde intramedullary nail (rIMN), (3) DLFLP + medial compression (DP construct), (4) rIMN (PN...
Background: A capsular shift procedure has been described for the treatment of hip instability; however, biomechanical effects such a are unknown. Purpose: To create cadaveric model capsule laxity and evaluate used to treat instability on this model. Study Design: Controlled laboratory study. Methods: Eight hips with an average age 58.5 years were tested custom testing system in 6 conditions: intact, vented, instability, capsulotomy, side-to-side repair, shift. model, was stretched extension...
In contrast to mice, in sheep no genome-wide demethylation of the paternal genome occurs within first postfertilization cell cycle. This difference could be due either an absence a demethylase activity that is present mouse ooplasm or increased protection methylated cytosine residues sperm. Here, we use interspecies intracytoplasmic sperm injection demonstrate DNA can demethylated oocytes. Surprisingly, also limited extent Our results suggest murine process facilitated by sperm-derived...