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Author Topic: Is there an ideal "angle"?  (Read 1320 times)

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Miguelito

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Is there an ideal "angle"?
« on: April 27, 2012, 05:44:44 AM »
Sorry to be posting another question so quickly. And yes it's the middle of the night. My body decided it needed a three hour nap this afternoon after I put my three year-old down, so there you go.

Dr. Gross gave me a nice x-ray of my implant that showed a line and a 31 degree angle of inclination (I think). I know in my pre-surgery research I saw that the goal was an angle of under 55 degrees, but I have no idea what 31 degrees should mean to me. Can anyone shed some light?

In the interest of full disclosure I must say that pre-surgery I would have scoured the web for hours looking for an answer to a question like this, but now I'm just curious.

Thx,

Mike
RHR April 2012.
LHR March 2014.

Both Biomet Magnum/Recap 54/48, by Dr. Thomas Gross.

obxpelican

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Re: Is there an ideal "angle"?
« Reply #1 on: April 27, 2012, 01:23:09 PM »
I've read a number of articles where the range should be 40-42 (+-) 10 to 12 degrees.

So anywhere between 50 and 30 depending on who wrote the article.  From what I understand when it's steep like 60+ it's worse for you but I guess too shallow could be bad too.


Chuck
Chuck
RH/Biomet U/C Dr. Gross/Lee Webb
8-6-08

bluedevilsadvocate

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Re: Is there an ideal "angle"?
« Reply #2 on: April 28, 2012, 12:27:48 AM »
From what I have read, there may be some uncertainty.  But, here is an abstract published in 2010 in the British The Journal of Bone and Joint Surgery; the authors suggest that the optimal inclination is 45 degrees + or - 10 degrees:

http://www.bjj.boneandjoint.org.uk/content/92-B/8/1072.abstract
LBHR 10-20-2010
Dr. Brooks - Cleveland Clinic
Age 62 at time of surgery

bluedevilsadvocate

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Re: Is there an ideal "angle"?
« Reply #3 on: April 28, 2012, 01:50:07 AM »
Here is what Dr. Harlan Amstutz wrote in a letter to the editor published in the February, 2012 edition of Orthopedics Today:

"After analysis of our 1350 Conserve Plus Hips (Wright Medical Technology), a safe zone was produced for all sizes suggesting 42 10 of abduction angle and a 15 10 of anteversion angle, which I believe represents a target well within reach for an experienced surgeon."
LBHR 10-20-2010
Dr. Brooks - Cleveland Clinic
Age 62 at time of surgery

obxpelican

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Re: Is there an ideal "angle"?
« Reply #4 on: April 28, 2012, 02:02:54 AM »
What you have to remember, some devices will be slightly different in what each surgeon thinks is a nominal angle for inclination and anti.

For instance, the ASR if that was not pretty exact you were screwed.


Chuck
Chuck
RH/Biomet U/C Dr. Gross/Lee Webb
8-6-08

 

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