Inner layer of the periosteum of a bone composed of flattened osteoprogenitor cells
Have the capacity to differentiate into osteoblasts
Important in fracture healing
Intracapsular area of neck of femur does not have cambium layer, hence healing after fracture is impaired

The bundles of trabeculae in proximal femur are:

Primary compressive
Primary tensile
Secondary compressive
Secondary tensile

Ward’s traingle is an area of the femoral neck formed by the intersection of 3 bundles of trabeculae

primary compressive trabeculae medially
primary tensile and secondary compressive trabeculae laterally

Area of the femoral neck formed by the intersection of 3 bundles of trabeculae

primary compressive trabeculae medially
primary tensile and secondary compressive trabeculae laterally

It is an area of low bone density
Contains thin, loosely packed trabeculae
Seen in x-rays as a radiolucent area

DHS – Dynamic Hip Screw

JESS – Joshi’s External Stabilizing System

T handle used in orthopedics
(Click on image for an enlarged view)

Galeazzi’s Fracture
(Click on  image for and enlarged view)

Fracture of radius at the junction of its middle third and distal third
with dislocation of distal radioulnar joint
Called fracture of necessity – always requires open reduction and internal fixation (ORIF)

DEXA: (acronym) Dual Energy X-ray Absortiometry
DEXA scanning, is currently the most widely used method to measure bone mineral density.

Healed fracture rib, seen as increased density and deformity of the ninth rib on the right side near the margin of the thorax, the commonest site of rib fracture.