Crozer biomech

quickster2008's version from 2016-01-14 04:13

Section 1

Question Answer
Hallux interphalangeal angleNormal 0-10°
DASA (distal articular set angle)Normal 7.5°
PASA (proximal articular set angle)Normal 7.5°
Types of joint deformitiesCongruent - joint lines are parallel Deviated - joint lines intersect outside joint Subluxed- joint lines intersect inside joint
Types of bunion deformities
Hallux abductus angleNormal 10-15°
IM angle (intermetatarsal angle)
Metatarsus adductus angleNormal <20°
True IM angleTrue IM angle = (metatarsus adductus angle - 15) + IM angle
1st Metatarsal protrusion distanceNormal +/- 2 mm compared to the 2nd metatarsal
Tibial sesamoid positionNormal 1-3
ROM1st MPJNormal 65-75° dorsiflexion and 40° plantarflexion
1st Metatarsal-medial cuneiform angleNormal 22°
1st ray ROMNormal 5 mm dorsiflexion + 5 mm plantarflexion = 1 cm total ROM

Section 2

Question Answer
Fallat & Buckholz 4th IM angle for tailor bunion evaluationAngle between bisection of 4th metatarsal and proximal-medial cortical border of 5th metatarsal Normal 6° Pathologic 8.7°
Fallat & Buckholz Lateral Deviation angle (lateral bowing) tailor bunion evaluationAngle of line bisecting head and neck of 5th met and line adjacent to proximal-medial cortex Normal 2.64° Pathologic >8°
Metatarsal lengthLongest 2 > 3 > 5 > 4 > 1 shortest
Metatarsal protrusionLongest 2 > 3 > 1 > 4 > 5 shortest
Lesser MPJ dorsiflexion/plantarflexion30-40° Dorsiflexion and 50-60° plantarflexion
Metatarsal declination angleNormal 21°
Metatarsal abductus angleNormal 0-15°
I M angle of 2nd and 5th metatarsalsNormal 14-18°
I M angle of 1st and 2nd metatarsals in splayfootPathologic >12°
IM angle 4th and 5th metatarsals in splayfootNormal 4-5° Pathologic >9° (Schoenhause says normal 4th IMA is 8°)

Section 3

Question Answer
normal Talar neck angle at birthBirth 130-140°
normal Talar neck angle in adultAdult 150-165°
Talar head and neck alignment to body
what is the Talar neck angle Long axis of head and neck with long axis of the body