Knee A to Z

Biomechanical means related to the mechanical movement of the body parts.

A biopsy is the surgical procedure where a piece of tissue from the body is cut off and then examined in the laboratory.

'Bi-partite' means 'in two parts', and in the knee world usually refers to a kneecap (patella) which is in two parts - a bi-partite patella. Page updated July 2024 by Dr Sheila Strover (Clinical Editor)

A blastocyst is an early-stage embryo that resembles a fluid-filled ball, with cells forming the outer wall and an inner cell mass like a bunch of grapes attached to it on the inside.

Blumensaat's line is a linear shadow on lateral X-rays of the knee that corresponds to the roof of the intercondylar notch between the two rounded condyles of the femur. Page updated May 2024 by Dr Sheila Strover (Clinical Editor)

BMAC is an abbreviation for bone marrow aspirate concentrate.

BMI is an abbreviation for 'body mass index'.

Board certification is a USA process whereby a doctor, or other approved professional, provides evidence of the full mastery of their chosen speciality.

Body mass index (BMI) is a ratio of a person's weight to height that has been recognised  by the US National Institutes of Health (NIH) and The World Health Organisation as a measure of obesity.

Bone cement is a polymethyl methacrylate mix that is used to fix objects like knee replacements to bone.