Bone mineral density changes during fracture healing: a densitometric study in rats

Authors:

P. J. Millett, B. Cohen, M. J. Allen, N. Rushton

Abstract:

Callus develops when a fracture undergoes secondary bone healing. Stability across a fracture is enhanced by the periosteal callus, which decreases mobility and strain on interfragmentary tissue by increasing the cross sectional area and the moment of inertia. Experimentally, it is recognized that the mineral content of fracture callus increases within the first 3 months after injury. There is also a direct correlation between mineral content of callus and its mechanical strength. Thus, there is great interest in measuring serial changes in mineral content over time in order to predict ultimate bone strength.

Intramedullary fixation is used commonly to provide stability to long bone fractures in humans. This type of fixation restores bony alignment and permits early weight bearing. The intramedullary nail serves as an internal splint with both bone and rod contributing to interfragmentary stability. Because this type of fixation is not rigid, repair occurs by secondary healing with formation of external callus. Currently, however, complications such as delayed union or nonunion may arise from excessive flexibility, rod deformation, fatigue fractures, or migration. Basic research into fracture healing is therefore essential to determine the optimum materials, geometry, and structural properties for fixation devices.

For the complete study: Bone mineral density changes during fracture healing: a densitometric study in rats

Peter Millett, MD

Average rating:

39 reviews

Alexandra Thompson

Mar 23, 2024

by Alexandra Thompson on Peter Millett, MD

110%

Dr. Millett and his team did a SLAP tear repair and bicep tenodesis on my left shoulder. I use my arms as an artist, and love to swim in the ocean, surf, paddle, and telemark ski. So regaining full use of my shoulder and keeping my bicep attached was very important to me. Now, over two years later, my shoulder has the equivalent range of motion as my other arm and as before the injury, and no pain. After the first three months it felt so good and was so strong that - to my horror - I completely forgot my six-month follow-up.

Not only did Dr. Millett and his team make my arm as good as new, but having had the experience of such kindness and expertise throughout the process of surgery and recovery is like an added shoulder superpower.

Thank you Rita, Brooke, Jason, Sarah, Camille, Olivia, Dr. Millett and everyone! And see you soon when my husband comes in for his knee...

Jeff Chandler

Jan 31, 2022

by Jeff Chandler on Peter Millett, MD

Flawless procedure, Easy recovery

Dr. Millet's repaired my knee and tibia, following a botched operation by a different surgeon. That procedure was virtually pain free and I was weight bearing within a few days. That was 18 years ago and the knee is still strong. A few years after the knee incident, Dr Millet repaired my shoulder. My insurance company approved me for 3 months of disability following that surgery. I was off pain medication in 2 days and had 90% range of motion within a week. I withdrew my disability claim and returned to work within two weeks of surgery. I’m not a famous athlete—just a regular guy. Nonetheless, I was treated like an NFL at the Steadman clinic. Most notable was the time for recovery. Other surgeons perform their hour-long task in the OR and don’t involve themselves in the other functions. Peter and his team manages the entire process from diagnosis, anesthesia, nursing care, and therapy. He takes a holistic approach to patient care and doesn’t skip any steps.

Jenn West

Jul 2, 2021

by Jenn West on Peter Millett, MD

Saved My Life

I went to Dr. Millett after 7 knee surgeries (6 on my right and 1 on my left) and had seen 11 different surgeons who all refused to remove femur metal from my right leg. I am highly allergic to metal and the chronic pain was leaving me bedridden for 3.5wks out of a month. He personally wrote me back on my inquiry, listened to my concerns, scheduled my surgery within a week (due to insurance issues) and personally followed up with my recovery. The level of patient care from Dr. Millett and his ENTIRE team is above any care I have ever received in my 20 years of dealing with orthopedic surgeons. There are not enough words to describe the level of care, dedication and professionalism you receive from Dr. Millett and his staff.
My only disappointment is that I did not find him sooner!!!

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