Using a calliper to restore the centre of the femoral head during total hip replacement

Hill, Janet; Archbold, H. A. P.; Diamond, Owen; Orr, John; Jaramaz, Branislav; Beverland, David

doi:10.1302/0301-620x.94b11.29144

Cited by 16 publications

(14 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shiramizu et al 12 developed this technique further with an L-shaped caliper to allow measurement of the long axis of the femur, and Ranawat et al 13 utilised a pin in the posterior inferior rim of the acetabulum. Hill et al 14 have described the use of the Belfast caliper to reproduce leg length and offset at hip replacement. Despite the many published techniques there is no universal agreement on how best to measure leg length during hip replacement.…”

Section: Survey 2 Methods Used To Assess Intraoperative Llimentioning

confidence: 99%

Hip surgeons and leg length inequality after primary hip replacement

et al. 2018

View full text Add to dashboard Cite

This study reports the results of 2 separate surveys of British Hip Society (BHS) members relating to leg length inequality (LLI) after primary total hip replacement (THR). Survey 1: Investigates the members' opinions on the effect of LLI on the outcome of THR and explores the acceptable limits of LLI. Survey 2: Reports on the intraoperative techniques currently used by BHS members to minimise LLI after THR. Results - Survey 1: 97% of all surgeons completing the survey believed that LLI can affect the outcome of THR. Results - Survey 2: All surgeons reported using at least 1 intraoperative technique for assessing leg length with a median of 5 techniques. Over 50% of surgeons use 2 or more tests. Conclusion - Survey 1: 89% of surgeons agreed that 15 mm of LLI after primary uncomplicated THR was always acceptable. 90% of surgeons felt that LLI more than 22.74 mm was never acceptable. Conclusion - Survey 2: Despite the multiple published papers on various methods of assessing leg length intraoperatively, the problem of LLI post THR persists. This study highlights the need for further research to develop a simple intraoperative technique with high accuracy and reproducibility.

show abstract

Section: Survey 2 Methods Used To Assess Intraoperative Llimentioning

confidence: 99%

Hip surgeons and leg length inequality after primary hip replacement

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The use of a caliper to measure diameter of the resected head and using this measurement to estimate the distance to the prosthetic head from fixed points on greater trochanter and resected neck to accurately reproduce femoral offset and height when an anatomic COR is chosen has been described [Figure 8]. 69…”

Section: How To Achieve Target Depthmentioning

confidence: 99%

Current Concepts in Acetabular Positioning in Total Hip Arthroplasty

Bhaskar

Rajpura

Board

2017

IJOO

View full text Add to dashboard Cite

Being one of the most successful surgeries in the history of medicine, the indications for total hip arthroplasty have widened and are increasingly being offered to younger and fitter patients. This has also led to high expectations for longevity and outcomes. Acetabular cup position has a significant impact on the results of hip arthroplasty as it affects dislocation, abductor muscle strength, gait, limb lengths, impingement, noise generation, range of motion (ROM), wear, loosening, and cup failure. The variables in cup position are depth, height, and angular position (anteversion and inclination). The implications of change in depth of center of rotation (COR) are medialized versus anatomical positioning. As opposed to traditional medialization with beneficial effects on joint reaction force, the advantages of an anatomical position are increasingly recognized. The maintained acetabular offset offers advantages in terms of ROM, impingement, cortical rim press fit, and maintaining medial bone stock. The height of COR influences muscle activity and limb lengths and available bone stock for cup support. On the other hand, ideal angular position remains a matter of much debate and reliably achieving a target angular position remains elusive. This is not helped by variations in the way we describe angular position, with operative, radiologic, or anatomic definitions being used variably to describe anteversion and inclination. Furthermore, pelvic tilt plays a major role in functional positions of the acetabulum. In addition, commonly used techniques of positioning often do not inform us of the real orientation of the pelvis on operating table, with possibility of significant adduction, flexion, and external rotation of the pelvis being possibilities. This review article brings together the evidence on cup positioning and aims to provide a systematic and pragmatic approach in achieving the best position in individual cases.

show abstract

“…Acetabular version was determined using the transverse acetabular ligament (TAL) (17), and cups inserted aiming for an intraoperative acetabular inclination of 35° (18). Leg length and offset were restored using a calliper technique to restore the centre of rotation of the femoral head, with TAL used to guide reaming, cup orientation and depth (19). Our philosophy is to restore global offset using a conservative reaming technique rather than medialising the cup by reaming down to the true floor.…”

Section: Methodsmentioning

confidence: 99%

The Incidence of Dissociated Liners in 4,751 Consecutive Total Hip Arthroplasties Using Pinnacle Polyethylene Acetabular Liners

et al. 2017

View full text Add to dashboard Cite

Ensuring correct liner seating/locking, minimising impingement, achieving appropriate component version and avoiding radiographic cup inclinations >50° should minimise the risk of liner dissociation. Any new noise or squeaking from a polyethylene liner should undergo radiographic investigation to exclude dissociation. We recommend managing late cases of liner dissociation with revision of the acetabular shell if the cup orientation could be improved or if there is any damage to the liner-locking groove, to reduce the risk of recurrence.

show abstract

Using a calliper to restore the centre of the femoral head during total hip replacement

Cited by 16 publications

References 28 publications

Hip surgeons and leg length inequality after primary hip replacement

Hip surgeons and leg length inequality after primary hip replacement

Current Concepts in Acetabular Positioning in Total Hip Arthroplasty

The Incidence of Dissociated Liners in 4,751 Consecutive Total Hip Arthroplasties Using Pinnacle Polyethylene Acetabular Liners

Contact Info

Product

Resources

About