Background: Most orthopedists are right-handed. However, osteoarthritis\noccurs with equal frequency over both sides. Does perfect and effective arthroplasty\nsurgery require ambidextrous motor skills? Objectives: In this study,\nwe aimed to investigate the clinical features of arthroplasty for hip and knee\njoints (THR and TKR) on different sides affected by orthopedist laterality. Patients\nand Methods: All right-handed orthopedists performed 64 right and 52\nleft primary THR among 100 patients, and 115 right and 118 left primary TKR\namong 192 patients. Clinical and surgical features were retrospectively reviewed\nand analyzed. The body mass index (BMI), inner diameter of acetabular\ncup liners (ACD), diameter of the femoral head (FHD), diameter of the\nfemoral stem (FSD), and the femoral neck length (FNL) were included in\nTHR-receiving patients. The BMI, femoral component (FC) size, tibial plate\n(TP) size, and thickness of articular surface inserts (ASI) were included in\nTKR-receiving patients. Results: No significant differences were observed in\nACD, FHD and FSD between patients receiving right and left THR groups (p\n= 0.16, 0.11, and 0.05, respectively). Similarly, there were no significant differences\nin FC, TP, and ASI between patients receiving right and left TKR\ngroups (p = 0.06, 0.80, and 0.46, respectively). However, FNL in left THR\ngroup was significantly longer than that in right THR group (p = 0.01). Conclusion:\nThis study showed that dexterity or proprioception in handedness\nhad no affect on bone resection and thicknesses of the polyethylene in TKR\nand acetabular reaming and femoral canal rasping in THR. However, it did\nlead to differences in femoral neck resection. Right-handed orthopedists significantly\ntend to perform excessive femoral neck cutting or prefer the larger size of FNL when performing left side THR, while no differences occur when\nperforming TKR.
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