Changes in Intra-pelvic Obliquity Angle 0-2 Years After Total Hip Arthroplasty and Its Effects on Leg Length Discrepancy：A Retrospective Study

Background：Total hip arthroplasty （THA） is one of the most effective treatments for phase Ⅲ and Ⅳ hip arthrosis.Lower limb length balancing is one of the determining factors of a successful surgery,particularly in patients with developmental dysplasia of the hip （DDH）.The purpose of this study was to evaluate the postoperative change in intra-pelvic obliquity （intra-PO） angle in the coronal plane and its effects on leg length discrepancy （LLD） within 2 years.Methods：A total of 78 patients （70 females,8 males） were enrolled in this study.All patients were suffering from DDH with varying degrees of LLD.Pelvic plain radiographs were collected before and after the operation.The intra-PO angles were measured 0,0.5,1 and 2 years after THA.At the same time,postoperative LLD was measured with blocking test.Results：PO changed significantly in the first year after THA surgery （0 year vs.0.5 year,P 〈 0.01;0.5 year vs.1 year,P 〈 0.01）,and the changing value of intra-PO angle （△PO） slowed down substantially during the first 2 years after THA （0.5 year vs.0.5-1 year,P 〈 0.01;0.5-1 year vs.1-2 years,P 〈 0.01）.With the change in intra-PO angle,LLD also got narrow within the 1st year （0 year vs.0.5 year,P 〈 0.01;0.5 year vs.1 year,P 〈 0.01）.Elderly patients had a smaller intra-PO angle reduction （Group A vs.Group B,P =0.01;Group B vs.Group C,P〈 0.01）.Conclusions：Intra-PO angle and LLD gap narrowed with time after THA surgery.In particular,elderly patients had smaller change in intra-PO angle.

The Question of Short Lower Limb and Long Lower in Manual Therapy: An Overview

The purpose of this paper is to review relevant literature concerning limb length inequalities in adults and to make recommendations for assessment and intervention based on the literature and our own clinical experience. The research was carried out on PUB MED, Non-English articles and duplicates in the databases were not included. Limb length inequality and common classification criteria are defined and etiological factors are present. Common methods of detecting limb length inequality include model manual technics. This work has the purpose of describing a well standardized therapeutic in the form of practical guidance. The approach we describe provides standardized model evaluation for leg lower limb in order to be used in rehabilitation clinic.