Changes in Intra-pelvic Obliquity Angle 0-2 Years After Total Hip Arthroplasty and Its Effects on Leg Length Discrepancy: A Retrospective Study / 中华医学杂志(英文版)
Chinese Medical Journal
;
(24): 1346-1350, 2015.
Article
in English
| WPRIM
| ID: wpr-231776
ABSTRACT
<p><b>BACKGROUND</b>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.</p><p><b>METHODS</b>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.</p><p><b>RESULTS</b>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 (ΔPO) 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).</p><p><b>CONCLUSIONS</b>Intra-PO angle and LLD gap narrowed with time after THA surgery. In particular, elderly patients had smaller change in intra-PO angle.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
General Surgery
/
Retrospective Studies
/
Age Factors
/
Arthroplasty, Replacement, Hip
/
Diagnosis
/
Hip Joint
/
Leg Length Inequality
Type of study:
Diagnostic study
/
Observational study
Limits:
Aged
/
Female
/
Humans
/
Male
Language:
English
Journal:
Chinese Medical Journal
Year:
2015
Type:
Article
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