Usefulness of a Simple Preoperative Planning Technique using Plain X‐rays for Direct Anterior Approach for Total Hip Arthroplasty

• DOI: 10.1111/os.12854
• Publication Date: 2020-12-11T07:04:50Z
• Authors: Hui‐ming Peng; Bin Feng; Xi Chen; Yi‐ou Wang; Yan‐yan Bian; Wei Wang; Xi‐sheng Weng; Wen‐wei Qian
• Keywords: Adult; Male; Acetate templating; Retrospective analysis; Arthroplasty, Replacement, Hip; Prosthesis Design; Osteoarthritis, Hip; Patient Care Planning; 03 medical and health sciences; 0302 clinical medicine; Prosthesis Fitting; Humans; Aged; Retrospective Studies; Orthopedic surgery; Reproducibility of Results; Middle Aged; Radiography; Leg length discrepancy; Fluoroscopy; Preoperative Period; Clinical Articles; Total hip arthroplasty; Female; Hip Prosthesis; RD701-811

To examine the accuracy, reliability, and reproducibility of a simple preoperative planning technique using plain X-rays.A retrospective analysis 96 consecutive cases primary direct anterior approach (DAA)-total hip arthroplasty (THA) from July 2015 to December 2018 was performed. The patients included 24 males 72 females, with an average age 70 years. standard AP pelvis radiographs patients' hips extended internally rotated were obtained pre- postoperatively. also completed on standardized pelvic radiographs. prearranged cup positioning radiologically measured intraoperatively fluoroscopy. correct leg length assessed intraoperatively, which compared planning. component by three independent researchers. Two researchers measurements times, intra-observer inter-observer reliability calculated. All received at least 6 months follow-up (6 months-4 years).In all cases, median discrepancy (LLD) 4.4 mm (range 1.6-15.9 mm), 84 had LLD smaller than 10 mm, 58 less 5 mm. None critical 2 cm or larger. multivariable logistic regression for (safe range: yes/no) co-variables including gender, ASA classification, type cup, surgeon's experience level, presence total contralateral side did not present statistical significance. angle inclination acetabular (IA) 42.3° (range: 28.7°-52.2°). Ninety-one within defined safe range. hit ratio be zone significantly higher Pinnacle cups that Continuum (P < 0.05). However, there no significant difference in side. its anteversion (AA) 20.6° 10.6°-40.1°). Only 41 presented significance affecting AA positioning. Meanwhile, fluoroscopy time (n = 86, missing data cases) 4 seconds 1-74), most (97.9%) having fewer 20 seconds.The combination intraoperative can reestablish right assure