Jim W Pierrepont1,2, Ed Marel3, Jonathan V Baré4, Leonard R Walter3, Catherine Z Stambouzou2, Michael I Solomon5, Stephen McMahon6, Andrew J Shimmin4. 1. School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Australia. 2. Optimized Ortho, Pymble, Australia. 3. Peninsula Orthopaedics, Dee Why, Australia. 4. Melbourne Orthopaedic Group, Windsor, Australia. 5. Sydney Orthopaedic Specialists, Prince of Wales Private Hospital, Randwick, Australia. 6. Department of Surgery (School of Clinical Sciences at Monash Health), Monash University, Malabar Orthopaedic Clinic, Windsor, Australia.
Abstract
BACKGROUND: Optimal implant alignment is important for total hip replacement (THR) longevity. Femoral stem anteversion is influenced by the native femoral anteversion. Knowing a patient's femoral morphology is therefore important when planning optimal THR alignment. We investigated variation in femoral anteversion across a patient population requiring THR. METHODS: Preoperatively, native femoral neck anteversion was measured from 3-dimensional CT reconstructions in 1215 patients. RESULTS: The median femoral anteversion was 14.4° (-27.1-54.5°, IQR 7.4-20.9°). There were significant gender differences (males 12.7°, females 16.0°; p < 0.0001). Femoral anteversion in males decreased significantly with increasing age. 14% of patients had extreme anteversion (<0° or >30°). CONCLUSIONS: This is the largest series investigating native femoral anteversion in a THR population. Patient variation was large and was similar to published findings of a non-THR population. Gender and age-related differences were observed. Native femoral anteversion is patient-specific and should be considered when planning THR.
BACKGROUND: Optimal implant alignment is important for total hip replacement (THR) longevity. Femoral stem anteversion is influenced by the native femoral anteversion. Knowing a patient's femoral morphology is therefore important when planning optimal THR alignment. We investigated variation in femoral anteversion across a patient population requiring THR. METHODS: Preoperatively, native femoral neck anteversion was measured from 3-dimensional CT reconstructions in 1215 patients. RESULTS: The median femoral anteversion was 14.4° (-27.1-54.5°, IQR 7.4-20.9°). There were significant gender differences (males 12.7°, females 16.0°; p < 0.0001). Femoral anteversion in males decreased significantly with increasing age. 14% of patients had extreme anteversion (<0° or >30°). CONCLUSIONS: This is the largest series investigating native femoral anteversion in a THR population. Patient variation was large and was similar to published findings of a non-THR population. Gender and age-related differences were observed. Native femoral anteversion is patient-specific and should be considered when planning THR.
Entities:
Keywords:
Femoral neck anteversion; total hip arthroplasty
Authors: David G Deckey; Christian S Rosenow; Cara Lai; Zachary K Christopher; Jens T Verhey; Adam J Schwartz; Joshua S Bingham Journal: Arthroplast Today Date: 2022-09-19