Results 1 to 10 of about 124,764 (204)

Classifying Cam Morphology by the Alpha Angle: A Systematic Review on Threshold Values [PDF]

Orthopaedic Journal of Sports Medicine, 2020
Background: The alpha angle is the most often used measure to classify cam morphology. There is currently no agreement on which alpha angle threshold value to use. Purpose: To systematically investigate the different alpha angle threshold values used for
Pim van Klij MD, Michael P. Reiman PT, PhD, Jan H. Waarsing PhD, Max Reijman PhD, Wichor M. Bramer PhD, Jan A.N. Verhaar MD, PhD, Rintje Agricola MD, PhD   +6 more
doaj   +3 more sources

The alpha angle as a predictor of contralateral slipped capital femoral epiphysis [PDF]

Journal of Children's Orthopaedics, 2016
Purpose Contralateral hip involvement in slipped capital femoral epiphysis (SCFE) is common. Femoral head−neck asphericity, as measured by an elevated alpha angle, has not previously been assessed with respect to SCFE risk.
Matthew J. Boyle, Jose F. Lirola, Grant D. Hogue, Yi-Meng Yen, Michael B. Millis, Young-Jo Kim   +5 more
doaj   +3 more sources

Rapid and reliable alpha angle measurement using a smartphone‐based artificial intelligence system for cam‐type femoroacetabular impingement [PDF]

Journal of Experimental Orthopaedics
Purpose Manual alpha angle measurement for diagnosing cam‐type femoroacetabular impingement (FAI) is time‐consuming and variable. We hypothesised that a smartphone‐based artificial intelligence (AI) system would demonstrate a high correlation with the ...
Masayoshi Saito, Hiroyuki Ogawa, Takuya Kusakabe, Naoyuki Hirasawa, Sachiyuki Tsukada   +4 more
doaj   +2 more sources

Automated measurement of alpha angle on 3D-magnetic resonance imaging in femoroacetabular impingement hips: a pilot study [PDF]

Journal of Orthopaedic Surgery and Research, 2022
Background Femoroacetabular impingement (FAI) syndrome is an established pre-osteoarthritic condition. Diagnosis is based on both clinical and radiographic parameters.
Nastassja Pamela Ewertowski, Christoph Schleich, Daniel Benjamin Abrar, Harish S. Hosalkar, Bernd Bittersohl   +4 more
doaj   +2 more sources

Three-Dimensional Measures of Bony Resection During Femoral Osteochondroplasty Are Related to Alpha Angle Measures: A Cadaveric Study [PDF]

Arthroscopy, Sports Medicine, and Rehabilitation, 2021
Purpose: To determine whether 3-dimensional (3D)–reconstructed proximal femoral bone models can be used to quantify femoral osteochondroplasty and to determine whether the 3D-based metrics are related to clinical alpha angle measures.
Thomas D. Alter, M.S., Philip Malloy, Ph.D., P.T., Alex C. Newhouse, B.S., Sunikom Suppauksorn, M.D., Alejandro Espinzoa Orias, Ph.D., Jorge Chahla, M.D., Ph.D., Nozomu Inoue, M.D., Ph.D., Shane J. Nho, M.D., M.S.   +7 more
doaj   +2 more sources

Impact of Preoperative and Residual Alpha Angle on Outcomes After Hip Arthroscopy [PDF]

Orthopedic Research and Reviews
Jasmine Puria,1,* Daniel Puczko,2,* Christopher S Frey,3,4 James L Rogers,2 Alicia M Hymel,5 Candler G Mathews III,3,6 Thomas M Spears,7 Jaron Paul Sullivan3 1College of Medicine, University of Tennessee Health Science Center, Memphis, TN,
Puria J, Puczko D, Frey CS, Rogers JL, Hymel AM, Mathews III CG, Spears TM, Sullivan JP   +7 more
doaj   +2 more sources

Influence of angle kappa and angle alpha on visual outcomes after implantation of a nondiffractive extended-depth-of-focus intraocular lens: a prospective observation study [PDF]

BMC Ophthalmology
Background While large angle kappa (chord µ) and angle alpha (chord α) have been reported to adversely affect visual quality with diffractive multifocal intraocular lenses (MIOLs), their impact on the postoperative visual outcomes of nondiffractive ...
Nuozhou Wu, Yihua Yao, Biting Zhou, Sinan Liu, Yunhui Zhang, Xiaohui Wang   +5 more
doaj   +2 more sources

Angle Kappa and angle Alpha agreement between Pentacam Scheimpflug system, swept source optical coherence tomography and ray-tracing aberrometry

Photodiagnosis and Photodynamic Therapy
Purpose: To compare the consistency of Pentacam Scheimpflug system (Pentacam® HR), ray-tracing aberrometry (iTrace), and swept source optical coherence tomography (IOLMaster 700) measurements for Angle Kappa and angle Alpha.
Wanping Zhang, Jun Hu, Qiuya Zhao, Xiangyun Lv, Siting Liang, Jun Hu   +5 more
doaj   +3 more sources

Ultrasonic measurement of acetabular alpha angle to evaluate developmental dysplasia of the hip: differences between AIUM guideline and European consensus [PDF]

European Journal of Medical Research
Purpose To clarify the difference between the alpha angles measured by European method and by AIUM method. Materials and methods In this prospective study, infants less than 6-month-old with clinical suspicion of DDH were enrolled from the pediatric ...
Ying Zhao, Yumiao Qiao, Kai Hong, Chao Zhang   +3 more
doaj   +2 more sources

Tibial genu varum and primary cam morphology in healthy young adults: A cross-sectional study uncovering the double threat to joint health [PDF]

Osteoarthritis and Cartilage Open
Objectives: This study investigated the association between alpha angles of the hip and tibial genu varum in a healthy population with equal male-to-female distribution. It also examined sex-based differences, explored the impact of sports participation,
Eva A. Bax, William Colyn, Johan Bellemans, Harrie Weinans, Rintje Agricola, Fleur Boel   +5 more
doaj   +2 more sources