Publications by authors named "T M Thillemann"
Anterior shoulder instability with glenoid bone lesion can be treated with the Eden-Hybinette procedure utilizing a tricortical iliac crest bone graft or the Latarjet procedure. This study aimed to evaluate the glenohumeral joint (GHJ) kinematics throughout an external shoulder rotation following the Eden-Hybinette and Latarjet procedures. Nine human specimens were examined with dynamic radiostereometry during a GHJ external rotation with anteriorly directed loads from 0 to 30 N.
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- The study analyzed shoulder movement (kinematics) in patients with anterior shoulder instability (ASI) and glenoid bone loss during an apprehension-relocation test, using the radiostereometric analysis (RSA) method.
- It involved 20 patients, comparing their ASI shoulders to their healthy shoulders by imaging and tracking the humeral head's position relative to the glenoid during specific movements.
- Results showed the ASI shoulders had more inferior and anterior positions of the humeral head and a greater displacement between apprehension and relocation tests, indicating increased joint laxity in these patients compared to their healthy counterparts.
Aims: The aim of this study was to evaluate the kinematics of the elbow following increasing length of the radius with implantation of radial head arthroplasties (RHAs) using dynamic radiostereometry (dRSA).
Methods: Eight human donor arms were examined by dRSA during motor-controlled flexion and extension of the elbow with the forearm in an unloaded neutral position, and in pronation and supination with and without a 10 N valgus or varus load, respectively. The elbows were examined before and after RHA with stem lengths of anatomical size, + 2 mm, and + 4 mm.
Purpose: Radial head arthroplasty (RHA) reestablishes elbow stability after complex radial head fracture, but complication rates are high, possibly due to inappropriate implant sizing. Knowledge of impact of radial head implant diameter on elbow kinematics is limited and warranted. This study evaluated elbow kinematics of different radial head implant diameters after RHA using dynamic radiostereometric analysis (dRSA).
View Article and Find Full Text PDFBackground: The aim of this prospective study was to investigate bone mineral density (BMD) changes in the proximal humerus of the shoulder during a healing period of 12 months after displaced 3- or 4-part proximal humerus fractures treated with open reduction and internal fixation (ORIF) with an anatomic angular stable locking plate and the influence on fracture healing and functional outcomes.
Methods: In a prospective multicenter study, 36 patients (29F and 7M, age range: 38-83) with unilateral displaced 3- or 4-part proximal humerus fractures were included for ORIF. Dual-energy x-ray absorptiometry for osteoporosis status was employed.