weight of bmhr device

[BI-LAT]

Hi, Just curious how much the BMHR device weighs. head and cup combined. I have a BHMR BI-LAT.  just curious what it adds to my overall weight.  bi-lat.

[Dan L]

If you mean a Birmingham Hip Resurfacing implant system, my surgeon told me about 18 - 20 ounces.  I am bi lat with BHR and have 2.2 - 2.4 lbs of cobalt chrome goodness inside of me.

He also shared that the amount of bone removed is "crumbs" so there is a net gain by having the implants.

Thanks

Dan

[Dannywayoflife]

The BMHR is different mate. It will weigh slightly more as more bone is resected and replaced by metal. However I believe the mini stem used in the BMHR is made from titanium so fairly light (but heavier than bone).

Danny

[Tin Soldier]

I'll bet those two devices BHR and BHMR are pretty similar in weights.  In general, either one will likely add a couple pounds to your weight as a bi-lat.  70% Co, 30% Cr., and a little Mo.  They're not called heavy metals for nothing, although they are actually some of the lighter heavy metals in that family.

Crumbs of Calcium, yeah, I've seen the photos.     yikes.     

[hippy hippy shake]

Tin,

Where did you get the info on the percent composition of the BHR?

Thanks,

HHS

[Dannywayoflife]

HHS the bhr is made from vitalium that's the rough % composition of that alloy if you google it it will give you loads of data

[fenceman]

You mean that the extra 20 lbs on the scale isn't due to the weight my Bi-lat BHR device? 

[hippy hippy shake]

HHS the bhr is made from vitalium that's the rough % composition of that alloy if you google it it will give you loads of data

Thanks Danny!
Sometimes it's nice to understand some of the details.
And now I know that vitallium makes some nice rings too!

[Dannywayoflife]

Your welcome

[Tin Soldier]

Sorry, I'm a little late.  McMinn's book, "Modern Hip Resurfacing" has the break down for at least the BHR composition.  I'm not sure if each maker has there own little spin on some proprietery alloy, but as Danny points out the general term used is Vitalium and I think it got started in the 50s as an internal prosthetic material.  I don't think there is much variance if any between makers.  Probably all comes from the same alloy maker.   Also, several of the commonly referenced papers, often have the break down.  Most commonly though, when folks discuss metals/metallosis,... they often just say 70% Co and 30% Cr and forget about the rest of the metals.