H
Harlan C. Amstutz
Researcher at University of California, Los Angeles
Publications - 285
Citations - 26216
Harlan C. Amstutz is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Hip resurfacing & Arthroplasty. The author has an hindex of 80, co-authored 285 publications receiving 25447 citations. Previous affiliations of Harlan C. Amstutz include University of California, Berkeley.
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"Modes of failure" of cemented stem-type femoral components: a radiographic analysis of loosening.
TL;DR: In view of the increasing incidence of stem-type femoral component loosening, a detailed retrospective radiographic zonal analysis of 389 total hip replacements indicated a 19.5% incidence of radiological evidences of mechanical looseness, i.e., fractured acrylic cement and/or a radiolucent gap at the stem-cement or cement-bone interfaces.
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Stiffness and laxity of the knee--the contributions of the supporting structures. A quantitative in vitro study
TL;DR: Thirty-five normal cadaver knees were tested manually in six positions of the knee using apparatus designed to measure the moment-rotation responses for both varus-valgus angulation and torsion of the tibia, as well as the force-displacement responses for anterior-posterior movement of thetibia.
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Assessing activity in joint replacement patients.
TL;DR: This study indicates that both the UCLA activity rating and the investigator visual analog scale are valid for routine activity assessment in a clinical setting.
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Metal-on-Metal Hybrid Surface Arthroplasty: Two to Six-Year Follow-up Study
Harlan C. Amstutz,Paul E. Beaulé,Frederick J. Dorey,Michel J. Le Duff,Pat Campbell,Thomas A. Gruen +5 more
TL;DR: The preliminary experience with this metal-on-metal hybrid surface arthroplasty bearing is encouraging and indicates Optimal femoral bone preparation and component fixation are critical to improving durability.
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Treatment of primary osteoarthritis of the hip. A comparison of total joint and surface replacement arthroplasty.
TL;DR: Multivariate stepwise regression analysis showed that the factors that affected the final extent and width of the acetabular radiolucencies adversely after resurfacing were: any radiolucent lines that were visible at six months, a high level of physical activity after arthroplasty, and a thin superior cement mantle.