important comments i need it from all of you.

important comments i need it from all of you.

praveen shukla

10/20/2008

dear friends here i need your views. would you mind to tell me in which phase of prosthetic gait cycle,actual planterflexion and doriflexion in a prosthetic SACH foot takes place. as per the atlas of limb prosthetics by john H. bowker and john W. michael.,1992 edition, planter flexion is replaced by the compression of the heel wedge.ankle dorsiflexion is not available in the SACH foot. and further it has been stated in the same book that planterflexor muscle simulatioin in the SACH foot is accomplished by the presence of the solid keel and ankle, which prevents ankle dorsiflexion; the drosiflexiors are simulated by the cushion heel, which absorbs plantar flexion forces during heel strike and foot flat. here i couldnot understand the difference between the two coloured phrases. as i know our anatomical ankle remains in neutral postion at the time of heel strike and goes in 15 degree planterflexion at foot flat and comes in 3 degree of dorsiflexion at midstance and there is 15 degree of planterflexion at heel off and 20 degree pf at toe off;
 
so where there is a planterflexion in prosthetic SACH foot and is there any dorsiflexion exist througout the gait cycle. give your valuable comments your effort is highly appreciatable.
praveen shukla
prosthetic lecterure.
VMMC and safdarjung hospital,new delhi.
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