pelvic is divided in to 4 types according to the shape of the brim.
1. Gynecoid -
it is normal female pelvic. this type of pelvic seen in 50% females.
INLET
Shapes - Round
anterior posterior segments - almost equal and spacious.
CAVITY
Sacrosciatic notch - wide and shallow
Sidewall - straight or slightly divergent .
OUTLET
ischial spines - not prominent
pubic arch - curved
subpubic angle - wide
Bituberous diameter - Normal
2. Anthropoid -
INTEL
shape - anterior posterior oval
anterior and posterior segment - both increased with slight anterior narrowing.
CAVITY
sacrosciatic notch - more wide and shallow
side wall - straight or divergent
OUTLET
ischial spines - not prominent
pubic arch - long and curved
subpubic angle - slightly narrow
Bituberous diameter - normal or short.
3. Android
INLET
shape - triangular, Heart shape
anterior and posterior segment - posterior segment short and anterior segment narrow
CAVITY
sacrosciatic notch - narrow and deep
sidewall - convergent
OUTLET
Ischial spine - prominent
pubic arch - long and straight
subpubic angle - narrow
Bituberous diameter - short
4. Platypelloid
INLET
shape - transversely oval
anterior and posterior segment - both reduced flat
CAVITY
sacrosciatic notch - slightly narrow and small
sidewall - divergent
OUTLET
ischial spines - not prominent
pubic arch - short and curved
subpubic angle - very wide (more than 90)
Bituberous diameter - wide
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