Publications by authors named "A C Thoreson"
Background: Total elbow arthroplasty (TEA) is increasingly used for expanding indications but complications like aseptic loosening and periprosthetic fractures persist. Our objective is to examine the biomechanical behavior of the total elbow implant in response to varying implant lengths by investigating the stresses and the stress shielding effect in the bone-implant assembly using finite element (FE) modelling.
Methods: A fourth-generation synthetic humerus sawbone and its corresponding digital model were used in this study.
Article Synopsis
- The STT joint is crucial for transferring loads between the wrist and thumb, and understanding its normal anatomy can help in diagnosing osteoarthritis.
- This study uses statistical shape modeling (SSM) to analyze the variations in the shape and position of the STT joint in 30 adult participants, revealing significant factors that influence bone morphology.
- Findings show that the first five modes of variation account for the majority of shape variations, and detailed measurements of joint space can aid in interpreting imaging results for the STT joint.
Article Synopsis
- Scapholunate interosseous ligament injuries can lead to wrist instability and are often hard to identify through traditional imaging methods.* -
- A study compared the effectiveness of standard radiographs, static CT, and dynamic 4DCT during wrist movement for diagnosing these ligament injuries using data from 21 participants who had surgery to confirm their injuries.* -
- Results indicated that the distance between bones at the scapholunate interval was significantly greater in injured wrists compared to uninjured ones, suggesting that dynamic 4DCT may improve early detection of these injuries.*
Objective: The purpose of this study was to investigate the consistency of the changes in the elastic modulus measured with ultrasound shear wave elastography (SWE) with changes measured through mechanical testing using tendons that were artificially altered by chemical modifications.
Methods: Thirty-six canine flexor digitorum profundus tendons were used for this experiment. To mimic tendon mechanical property changes induced by tendinopathy conditions, tendons were treated with collagenase to soften the tissue by collagen digestion or with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) to stiffen the tissues through chemical crosslinking.
Lunotriquetral coalitions are the most common form of carpal coalition wherein the cartilage between the lunate and triquetrum ossification centers failed to undergo apoptosis. This technical case report examines the arthrokinematics of bilateral lunotriquetral coalitions with dissimilar Minnaar types in one participant with one asymptomatic wrist and one wrist with suspected distal radioulnar joint injury. Static and dynamic (four-dimensional) CT images during pronosupination were captured using a photon-counting detector CT scanner.
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