ArticleJournal of orthopaedic surgery and research2021
The intraoperative use of a calliper predicts leg length and offset after total hip arthroplasty. Component subsidence influences the leg length.
Article in Journal of orthopaedic surgery and research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.
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Who cites it
7 citing papers in PubMed, 1 synthesis or guideline pooled it, 10 citations in OpenAlex.
- Clinical efficacy of robot-assisted total hip arthroplasty for developmental dysplasia of the hip: A meta-analysis.Joint diseases and related surgery · 2026Pooled it
- Application of artificial intelligence-based three dimensional digital reconstruction technology in precision treatment of complex total hip arthroplasty.International orthopaedics · 2025Article
- Application and exploration of total hip arthroplasty for developmental dysplasia of the hip assisted by full-process robotics.BMC musculoskeletal disorders · 2025Article
- Weak hammering sounds are associated with postoperative subsidence in cementless total hip arthroplasty.International orthopaedics · 2025Article
- Relationship of Pelvic Positional Change with Leg Length and Offset Measurement in Experimental Total Hip Arthroplasty.Orthopaedic surgery · 2023Article
- Intraoperative method of femoral head central measurement to prevent leg length discrepancy following hemiarthroplasty.Frontiers in surgery · 2022Article
- Logistic Regression Analysis of Risk Factors and Improvement of Clinical Treatment of Traumatic Arthritis after Total Hip Arthroplasty (THA) in the Treatment of Acetabular Fractures.Computational and mathematical methods in medicine · 2022Article
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Authors and funding
3 authors at 3 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe purpose of total hip arthroplasty (THA) post-surgery and proper physiotherapy is positive recovery for the patient. Consideration is given to hip replacement biomechanics by ensuring no discrepancies in limb length (LL) and a stable prosthesis. Therefore, the patient must have proper preoperative planning and communication and a clear understanding of what to expect.
methodsA prospective series of 59 THA operated by a single surgeon via Hardinge approach was studied, using an intraoperative calliper (CAL) to predict the change of LL and offset. We compared the results of the intraoperative changes before and after THA implantation with the reference of these values on anteroposterior x-ray pelvis. The importance of leg length balance and a good offset restoration is questioned, and the effect of component subsidence on leg length is considered.
resultsThe average preoperative leg length discrepancy was -6.0 mm, postoperatively +3.6 mm. There was a strong correlation between the CAL measurements and the values on the x-ray (LL, r=0.873, p<0.01; offset, r=0.542, p<0.01). Reliability is better for limb length than for offset. These results are comparable within the literature and the statistical results from other studies reviewed. In addition, we evaluate the importance of subsidence of the prosthesis components for long-term results.
conclusionThe intraoperative use of CAL gives excellent results in predicting the final LL and offset after THA. Considering subsidence of prosthesis components, a target zone around +5 mm might be more suitable for leg length directly postoperatively. Moreover, surgeons must discuss the topic of leg length discrepancy (LLD) intensively with the patient pre-operatively. LEVEL OF EVIDENCE: Level 4, prospective cohort study.
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