Document Detail

High preoperative range of motion is a significant risk factor for dislocation in primary total hip arthroplasty.
MedLine Citation:
PMID:  20541892     Owner:  NLM     Status:  MEDLINE    
Dislocation after total hip arthroplasty (THA) is multifactorial and is dependent on surgical, implant, and patient factors. We hypothesized that high preoperative hip range of motion is an important variable contributing to instability after THA. We retrospectively reviewed 3379 THAs performed during a 21-year period. Average follow-up was 6.6 years. We examined the effect of surgical approach, femoral head size, and preoperative range of motion on dislocation rates. Patients with a posterior approach and 115 degrees or greater of combined preoperative flexion, adduction, and internal rotation dislocated at a significantly higher frequency than those with less than 115 degrees of combined motion (odds ratio, 1.9; P = .007). High preoperative motion in conjunction with a posterior approach and femoral head size less than 32 mm had the highest dislocation rate in our sample (5.9%). Preoperative range of motion is an important variable that should be taken into consideration during operative planning to help reduce the risk of dislocation.
Brian A Krenzel; Michael E Berend; Robert A Malinzak; Philip M Faris; E Michael Keating; John B Meding; Merrill A Ritter
Publication Detail:
Type:  Journal Article     Date:  2010-06-11
Journal Detail:
Title:  The Journal of arthroplasty     Volume:  25     ISSN:  1532-8406     ISO Abbreviation:  J Arthroplasty     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-24     Completed Date:  2011-01-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8703515     Medline TA:  J Arthroplasty     Country:  United States    
Other Details:
Languages:  eng     Pagination:  31-5     Citation Subset:  IM    
Copyright Information:
Copyright 2010. Published by Elsevier Inc.
Joint Replacement Surgeons of Indiana Research Foundation Center for Hip and Knee Surgery, Mooresville, Indiana 46158, USA.
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MeSH Terms
Aged, 80 and over
Arthroplasty, Replacement, Hip*
Follow-Up Studies
Hip Dislocation / epidemiology*
Hip Joint / physiopathology*,  surgery
Hip Prosthesis
Longitudinal Studies
Middle Aged
Osteoarthritis, Hip / surgery
Preoperative Period*
Prosthesis Failure
Range of Motion, Articular / physiology*
Retrospective Studies
Risk Factors
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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