mi·​cro·​frac·​ture | \ ˌmī-krō-ˈfrak-chər, -shər How to pronounce microfracture (audio) \

Medical Definition of microfracture

1 : a small or minute fracture in a material (such as bone)
2 : an arthroscopic surgical procedure for the repair of damaged articular cartilage that involves debriding loose and calcified cartilage and drilling small holes in the bone beneath so that blood and bone marrow flow through and form a clot over the area of cartilage damage which will eventually develop into replacement fibrocartilage In a classic treatment for cartilage regeneration, known as microfracture, mesenchymal stem cells are released from marrow in the underlying bone to permeate the damaged cartilage area.— Jacob Klein, Science, 2 Jan. 2009

Learn More about microfracture

Cite this Entry

“Microfracture.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/microfracture. Accessed 19 Sep. 2020.

Comments on microfracture

What made you want to look up microfracture? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Homophone Quiz

  • three bears two of them look like theyre whispering to a third bear who looks chuffed to be the center of attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!