senior games poster 2014_0304_mba

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Discussion and Conclusions Introduc0on Results It is unknown if morphological abnormali5es of the hip are compa5ble with lifelong hip func5on and avoidance of osteoarthri5s (OA). Our purpose was to inves5gate the prevalence of radiographic findings consistent with developmental dysplasia of the hip (DDH) and femoroacetabular impingement (FAI) in senior athletes with wellfunc5oning hips. Pa0ents and Methods The Prevalence of Hip Morphologic Abnormali0es in a Highly Ac0ve Senior Popula0on University of Utah Orthopaedics, Salt Lake City, Utah Lucas Anderson MD, Ashley Kapron Phd, Stephen Aoki MD, Jesse Chrastil MD, Mike B. Anderson MS ATC, Ray Grijalva MD, Jill Erickson PAC, Christopher L. Peters MD Disclosures are listed in the AAOS program and website. There are no conflicts with this topic. Overall Hip Morphology Pa5ents with OA were more likely to have radiographic features of FAI OR 3.7, 95% CI 1.6 – 8.8, p=0.003 Male pa5ents were more likely to have radiographic features of FAI OR 10.7, 95% CI 5.4 – 21.1, p<0.001 Breakdown of OA by hip morphology Breakdown of subjects with FAI DDH Lateral Center Edge Angle (LCEA) < 20° Cam FAI Alpha angle (AA) ≥50° on Frog Leg Lateral or AP views Pincer FAI LCEA > 39°, Acetabular Index (AI) < 0° and/or crossover sign present OA Tönnis Grade 2 or 3 55% Male, Mean Age 67 yrs (5091 yrs) 93% Caucasian 5 hips excluded (prior THA or Fx) 1087 Na5ve Hip Xrays were reviewed from 546 Senior Athletes at the Huntsman World Senior Games (St. George, Utah) Radiographic Measures and Associated Cutoffs to Determine Prevalence of Hip Pathomorphology Morphologic abnormali5es (91%), par5cularly FAI (82%), were more prevalent than an5cipated in these senior athletes. Rate of radiographic osteoarthri5s was rela5vely low (16%) but strongly correlated with FAI. While radiographic prevalence of FAI is high (82%) only 20% of FAI hips showed signs of Tönnis grade 2 or 3. While FAI and dysplasia have historically been associated with development of early OA, this study suggests that there may be other factors, such as gene5cs and car5lage type, which may play a joint preserving role despite presence of pathomorphology in this series of high func5oning senior athletes. 91% of hips had radiographic features of pathomorphology Histogram shows different historical cutoffs yield varied prevalences of cam FAI.

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Page 1: Senior Games Poster 2014_0304_mba

 Discussion  and  Conclusions    

 Introduc0on    Results    It  is  unknown  if  morphological  abnormali5es  of  the  hip  are  compa5ble  with  life-­‐long  hip  func5on  and  avoidance  of  osteoarthri5s  (OA).        

Our  purpose  was  to  inves5gate  the  prevalence  of  radiographic  findings  consistent  with  developmental  dysplasia  of  the  hip  (DDH)  and  femoroacetabular  impingement  (FAI)  in  senior  athletes  with  well-­‐func5oning  hips.              Pa0ents  and  Methods    

The  Prevalence  of  Hip  Morphologic  Abnormali0es  in  a  Highly  Ac0ve  

Senior  Popula0on     University  of  Utah  Orthopaedics,  Salt  Lake  City,  Utah  

Lucas  Anderson  MD,  Ashley  Kapron  Phd,  Stephen  Aoki  MD,  Jesse  Chrastil  MD,  Mike  B.  Anderson  MS  ATC,    

Ray  Grijalva  MD,  Jill  Erickson  PA-­‐C,  Christopher  L.  Peters  MD  

Disclosures  are  listed  in  the  AAOS  program  and  website.  There  are  no  conflicts  with  this  topic.    

Overall  Hip  Morphology    

Pa5ents  with  OA  were  more  likely  to  have  radiographic  features  of  FAI    •  OR  3.7,  95%  CI  1.6  –  8.8,  p=0.003  

 

Male  pa5ents  were  more  likely  to  have  radiographic  features  of  FAI    •  OR  10.7,  95%  CI  5.4  –  21.1,  p<0.001  

Breakdown  of  OA  by  hip  morphology  

Breakdown  of  subjects  with  FAI  

DDH   Lateral  Center  Edge  Angle  (LCEA)  <  20°  

Cam  FAI   Alpha  angle  (AA)  ≥50°  on  Frog-­‐Leg  Lateral  or  AP  views  

Pincer  FAI  LCEA  >  39°,  Acetabular  Index  (AI)    <  0°  and/or  cross-­‐over  sign  present  

OA   Tönnis  Grade  2  or  3  

•  55%  Male,  Mean  Age  67  yrs  (50-­‐91  yrs)  •  93%  Caucasian    •  5  hips  excluded  (prior  THA  or  Fx)  

1087  Na5ve  Hip  X-­‐rays  were  reviewed  from  546  Senior  Athletes  at  the  Huntsman  World  Senior  Games  (St.  George,  Utah)  

Radiographic  Measures  and  Associated  Cutoffs  to  Determine  Prevalence  of  Hip  Pathomorphology  

 

Morphologic  abnormali5es  (91%),  par5cularly  FAI  (82%),  were  more  prevalent  than  an5cipated  in  these  senior  athletes.      

Rate  of  radiographic  osteoarthri5s  was  rela5vely  low  (16%)  but  strongly  correlated  with  FAI.          

While  radiographic  prevalence  of  FAI  is  high  (82%)  only  20%  of  FAI  hips  showed  signs  of  Tönnis  grade  2  or  3.      

While  FAI  and  dysplasia  have  historically  been  associated  with  development  of  early  OA,  this  study  suggests  that  there  may  be  other  factors,  such  as  gene5cs  and  car5lage  type,  which  may  play  a  joint  preserving  role  despite  presence  of  pathomorphology  in  this  series  of  high  func5oning  senior  athletes.    

91%  of  hips  had  radiographic  features  of    pathomorphology  

Histogram  shows  different  historical  cutoffs  yield  varied  prevalences  of  cam  FAI.