Objective The femoral tunnel position is crucial to anatomic single‐bundle anterior cruciate ligament (ACL) reconstruction, but the ideal footprint are mostly based on small‐sized cadaveric studies and elderly patients with a single ethnic background. This study aimed identify potential race‐ or gender‐specific differences in ACL location orientation, determine correlation between orientation location. Methods Magnetic resonance images (MRIs) of 90 Caucasian participants matched Chinese...

Background The medial-pivot (MP) prosthesis was developed to produce more physiological postoperative knee kinematics and better patient satisfaction than traditional prostheses, but outcomes are inconsistent in different studies of Caucasian patients. This study aimed investigate the vivo MP posterior-stabilized (PS) during gait activity Chinese Methods A retrospective analysis 12 patients received for this each group PS group. Patient-reported level Forgotten Joint Score (FJS) were...

Osteoarthritis (OA) progression in the lateral compartment is most common reason for revision after medial unicompartmental knee arthroplasty (UKA). Altered contact kinematics may be related to pathogenesis of OA.To quantify vivo 6 degrees freedom (6-DOF) and points during a single-leg lunge knees UKA compare them with contralateral native knee.Descriptive laboratory study.Included were 13 patients (3 male, 10 female; mean age, 64.7 ± 6.2 years) who had undergone unilateral UKA. All...

Abstract Background The aim of the present study was to identify potential race- or gender-specific differences in anterior cruciate ligament (ACL) tibial footprint location from tibia anatomical coordinate system (tACS) origin, investigate distances root lateral meniscus (ARLM) and medial spine (MTS), determine how reliable ARLM MTS can be locating ACL footprint, assess risk iatrogenic injuries caused by using reamers with various diameters (7–10 mm). Patients methods Magnetic resonance...

Background: Total hip arthroplasty (THA) for dysplasia patients is sometimes complex and compromises pathomorphological changes in these patients. However, it remains unclear whether preoperative deformities or postoperative structures anatomic during THA that have the most remarkable correlation with dynamic function gait. The purpose of this study was to investigate relationship propose insights into surgical reconstruction strategy developmental hip. Methods: A total 21 unilateral...

Although the femoral tunnel position is crucial to anatomic single-bundle anterior cruciate ligament (ACL) reconstruction, recommendations for ideal footprint are mostly based on cadaveric studies with small sample sizes, elderly patients unknown ACL status, and 2-dimensional techniques. Furthermore, a potential difference in orientation between ACL-ruptured ACL-intact knees has not been reported literature.The vary significantly matched control knees.Cross-sectional study; Level of...

This study aimed to compare the in-vivo kinematics and articular contact status between medial-pivot total knee arthroplasty (MP-TKA) posterior stabilized (PS) TKA during weight-bearing single-leg lunge. 16 MP-TKA 12 PS-TKA patients performed bilateral lunges under dual fluoroscopy surveillance determine six degrees-of-freedom kinematics. The closest point surface models of femoral condyle polyethylene insert was used position area. nonparametric statistics analysis test symmetry PS-TKA....

Background This study aimed to explore whether pre- or postoperative hip structures surgical changes significantly influence range of motion (ROM) symmetry in patients with dysplasia during gait after total arthroplasty (THA) and provide possible suggestions. Methods Fourteen unilateral underwent computed tomography before surgery create three-dimensional models. Pre- acetabular femoral orientations, rotation centers (HRC), lengths were measured. Bilateral ROM level walking THA was...

Background While in vitro wear simulation of unicompartmental knee arthroplasty (UKA) showed outstanding long-term performance, studies reported that polyethylene (PE) was responsible for 12% fixed-bearing (FB) UKA failure. This paper aimed to quantify the vivo 6-degrees-of-freedom (6-DOF) kinematics and contact positions FB during daily activities compare with previous results simulator. Methods Fourteen patients following unilateral medial received a CT scan dual fluoroscopic imaging level...

Female sex is an independent risk factor for anterior cruciate ligament (ACL) injury, as the incidence of ACL rupture 4- to 6-fold higher in female athletes compared with their male counterparts. The attachment location a potential increased rate women has never been reported literature.The purpose present study was investigate 3-dimensional topographic anatomy bundle and patients, without rupture, identify sex-related differences. We hypothesized that would be significantly different...

In vitro biomechanical experiments utilizing cadaveric specimens are one of the most effective methods for rehearsing surgical procedures, testing implants, and guiding postoperative rehabilitation. Applying dynamic physiological muscle force to is a challenge reconstructing environment bionic mechanics in vivo, which often ignored experiment. The current work aims establish hardware platform numerical computation reproduce forces that can be applied mechanical on specimens. Dynamic loading...

Abstract The purposes of this study were to propose a quantitative method bearing overhang minimize the effect spinning on mobile‐bearing unicompartmental knee arthroplasty (MB UKA), suggest and apply safe regions in daily activities. distance area calculated for neutral positions. based relationship between linear wear rate. Eleven patients included an in‐vivo experiment under dual fluoroscopic imaging following medial MB UKA. position was tracked by minimal joint space width, accordingly....

Background: The complexity of the spatial dynamic flexion axis (DFA) elbow joint makes prosthesis design and humeral component alignment challenging. This study aimed to 1) investigate variations DFA during 2) relationship between distal trochlear geometry in vivo variation DFA. Methods: Ten healthy subjects participated this study. Each subject performed a full extension maximum with hand supination under dual fluoroscopic imaging system (DFIS) surveillance. 2D images 3D bone models were...