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LETTER TO EDITOR  
Year : 2014  |  Volume : 48  |  Issue : 4  |  Page : 438
Head size and dislocation rate in primary total hip arthroplasty


Department of Orthopaedics, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India

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Date of Web Publication8-Jul-2014
 

How to cite this article:
Elhence A, Jalan D, Talreja H. Head size and dislocation rate in primary total hip arthroplasty. Indian J Orthop 2014;48:438

How to cite this URL:
Elhence A, Jalan D, Talreja H. Head size and dislocation rate in primary total hip arthroplasty. Indian J Orthop [serial online] 2014 [cited 2019 Nov 22];48:438. Available from: http://www.ijoonline.com/text.asp?2014/48/4/438/136315
Sir,

We read the article Head size and dislocation rate in primary total hip arthroplasty, [1] with keen interest. We appreciate the authors work; however, we would like to point out certain issues.

  1. The authors have made two groups based on head size; however, it was not clear from the study if any criteria or randomization was used to allocate a patient into either of these groups
  2. The authors have discussed that there was no difference between the groups so far as age, sex, and indications for primary total hip arthroplasty were concerned. However, the demographic profile of the two groups was not sex-matched; female-to-male ratio between groups A and B was 0.37 and 0.68, respectively. According to the literature, female gender is associated with a higher dislocation rate; [2],[3],[4] so was this a contributing factor in causing increased dislocation rate in group B (28 mm group)
  3. According to the authors, the etiology of dislocation (one in group A and three in group B) was component malposition. While component malposition itself is an independent risk factor for dislocation, [4],[5] is it justifiable to consider head size as the only factor when other confounding factors are also present


 
   References Top

1.Singh SP, Bhalodiya HP. Head size and dislocation rate in primary total hip arthroplasty. Indian J Orthop 2013;47:443-8.  Back to cited text no. 1
[PUBMED]  Medknow Journal  
2.Kim YH, Choi Y, Kim JS. Influence of patient-, design-, and surgery-related factors on rate of dislocation after primary cementless total hip arthroplasty. J Arthroplasty 2009;24:1258-63.  Back to cited text no. 2
    
3.Leichtle UG, Leichtle CI, Taslaci F, Reize P, Wünschel M. Dislocation after total hip arthroplasty: Risk factors and treatment options. Acta Orthop Traumatol Turc 2013;47:96-103.  Back to cited text no. 3
    
4.Turner RS. Postoperative total hip prosthetic femoral head dislocations. Incidence, etiologic factors, and management. Clin Orthop Relat Res 1994;301:196-204.  Back to cited text no. 4
    
5.Biedermann R, Tonin A, Krismer M, Rachbauer F, Eibl G, Stöckl B. Reducing the risk of dislocation after total hip arthroplasty, the effect of orientation of acetabular component. J Bone Joint Surg Br 2005;87:762-9.  Back to cited text no. 5
    

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Correspondence Address:
Harish Talreja
Department of Orthopaedics, All India Institute of Medical Sciences, Jodhpur - 342 005, Rajasthan
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0019-5413.136315

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