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  1. #1
    Join Date
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    Spinal instrumentation Concepts and Biomechanics

    I have to thank Sharon for posting the occasional Dr Hey vid.... One thing leads to another and presto! I found the goods! Courtesy of the Seattle Science Foundation.

    This vid will answer a few questions about our hardware....

    https://www.youtube.com/watch?v=q0-EdCJyfgA

    Some of this might be a little boring for some, make sure you get your popcorn.

    Ed
    49 yr old male, now 58, the new 53...
    Pre surgery curves C12,T70,L70
    ALIF/PLIF T2-Pelvis 01/29/08, 01/31/08 7" pelvic anchors BMP
    Dr Brett Menmuir St Marys Hospital Reno,Nevada

    Bending and twisting pics after full fusion
    http://www.scoliosis.org/forum/showt...on.&highlight=

    My x-rays
    http://www.scoliosis.org/forum/attac...2&d=1228779214

    http://www.scoliosis.org/forum/attac...3&d=1228779258

  2. #2
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    Okay I watched that entire video. Material science plus a touch of physical chemistry.

    These surgeons really have to know engineering in addition to medicine.

    Based on the comments I think I heard in the video, proximal junction kyphosis is the biggest problem with fusions. Getting the sagittal plane in balance is the grail. From the testimonials I have read over the years in this sandbox, that really does seem to be the case.
    Sharon, mother of identical twin girls with scoliosis

    No island of sanity.

    Question: What do you call alternative medicine that works?
    Answer: Medicine


    "We are all African."

  3. #3
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    I agree with Pooka. That engineering is part of medicine but probably less predictable. I think my upper extremity specialist has an engineering degree also. Think about removing a part of the scapula and then transferring a muscle to do replace the job of one that failed.
    T10-pelvis fusion 12/08
    Fractured t-9 six days out of surgery
    C5,6,7 fusion 9/10
    PJK at t-9
    T2--T10 fusion 2/11
    Removal of left side t6-t10. 8/14
    C 4-5 fusion 11/14
    Right scapulectomy 6/15
    Right pectoralis major muscle transfer to scapula
    To replace the action of Serratus Anterior muscle 3/16

  4. #4
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    reno,nevada
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    Yup, yup and yup....

    I have always wondered why not just go bigger if the rods break?....or build a stronger construct? We do need “some” movement for healing to happen. I read this someplace else many years ago....

    My rods were pre bent at the factory. I guarantee they use either jigs or CNC roller bending equipment, not hand benders at the factory... The bending and shaping is critical, and I agree that if a surgeon over bends, don’t try to correct, just throw the rods out and start over. Also, the rods almost always break at the screw heads.

    My sagittal plane situation was pretty darn good, it really didn’t change too much. The sagittal plane is more important than the actual scoliosis curves on outcomes. Kyphosis can really wreak havoc, along with PJK. This question needs to be answered.....Why does kyphosis happen? Why the breakdown on only the front of the endplate? Why is this location specific?

    Funny how different surgeons will have the option to tap or not tap. And some will under tap a turn like my surgeon did, (states this in my hospital report) for increased locking or tightening effect...It also seems now that almost all the screws now are titanium.....I am wondering if this is mostly due to a biofilm effect. ???

    He also answers the cross member question. I don’t have any, and read that its also not suggested for DDD patients.

    The pedicle has strong bone......its also tricky aligning and getting through without a breach.....which makes me think about the tethering procedure and how they avoid this by going through the side. Once again, its only one pothole in the road we have to steer around, and all surgery has its pros and cons.

    Seattle Science has some great videos......I will have to check out a few more. I watched all the Research Channel “scoliosis” videos years ago with Jens Chapman. I cant seem to find these anymore.....They shouldn’t let this material be lost, its such a shame. If its financial, then Zucky, Gates or Uncle Warren need to throw some or kick down in that direction. (smiley face)

    https://www.youtube.com/user/ResearchChannel/videos

    Time for coffee

    Ed
    49 yr old male, now 58, the new 53...
    Pre surgery curves C12,T70,L70
    ALIF/PLIF T2-Pelvis 01/29/08, 01/31/08 7" pelvic anchors BMP
    Dr Brett Menmuir St Marys Hospital Reno,Nevada

    Bending and twisting pics after full fusion
    http://www.scoliosis.org/forum/showt...on.&highlight=

    My x-rays
    http://www.scoliosis.org/forum/attac...2&d=1228779214

    http://www.scoliosis.org/forum/attac...3&d=1228779258

  5. #5
    Join Date
    Jan 2012
    Location
    Yacolt, WA
    Posts
    1,525

    Ran out of popcorn....

    Thanks for posting, Ed but I ran out of popcorn about 10 minutes into the video.
    Susan
    Adult Onset Degenerative Scoliosis @65, 25* T & 36* L w/ 11.2 cm coronal balance; T kyphosis 90*; Severe disc degen T & L stenosis

    2013: T3- S1 Fusion w/ ALIF L4-S1/XLIF L2-4, PSF T4-S1 in 2 surgeries
    2014: Hernia @ ALIF repaired; Emergency screw removal surgery for Spinal Cord Injury at T4,5 sec to PJK
    2015: Revision Broken Bil T & L rods and no fusion: 2 revision surgeries; hardware P. Acnes infection
    2016: Ant/Lat Lumbar diskectomy w/ 4 cages + BMP + harvested bone + prayer

  6. #6
    Join Date
    Dec 2008
    Location
    illinois
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    Susan good to hear from you. I hope you are well. My popcorn supply needs replenishing.
    As a side note I think the muscle transfer worked. I am almost six months out and so far it is good. Still a little hard to do some movement but in time that may get better.
    T10-pelvis fusion 12/08
    Fractured t-9 six days out of surgery
    C5,6,7 fusion 9/10
    PJK at t-9
    T2--T10 fusion 2/11
    Removal of left side t6-t10. 8/14
    C 4-5 fusion 11/14
    Right scapulectomy 6/15
    Right pectoralis major muscle transfer to scapula
    To replace the action of Serratus Anterior muscle 3/16

  7. #7
    Join Date
    May 2008
    Location
    reno,nevada
    Posts
    3,551
    Quote Originally Posted by susancook View Post
    Thanks for posting, Ed but I ran out of popcorn about 10 minutes into the video.
    Susan
    Susan, I don’t believe you.....

    Are you doing ok? Did you see my Panama stem cell thread?

    Jackie, good news on the muscle transfer....

    Is the winging over? Are you past the pain yet?

    Ed
    49 yr old male, now 58, the new 53...
    Pre surgery curves C12,T70,L70
    ALIF/PLIF T2-Pelvis 01/29/08, 01/31/08 7" pelvic anchors BMP
    Dr Brett Menmuir St Marys Hospital Reno,Nevada

    Bending and twisting pics after full fusion
    http://www.scoliosis.org/forum/showt...on.&highlight=

    My x-rays
    http://www.scoliosis.org/forum/attac...2&d=1228779214

    http://www.scoliosis.org/forum/attac...3&d=1228779258

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