1.
Moshie Cohen asks:
Background to the Daf
>>30)[line 48] D'SHAF MI'DUCHTEI- that was dislocated (lit. that slipped from its place). The joint of the hip is a ball-and-socket joint; according to RASHI, the small round ligaments ("Nivei") that attach the bones inside the joint are torn<<
This is not Rashi's opinion; it is Rava's opinion in the Gemara in a couple of lines. This should be:
30)[line 48] D'SHAF MI'DUCHTEI- (lit. that slipped from its place) that was dislocated [out of its socket]
3.
The Kollel replies:
Dear Moshie,
The Kollel is correct. Only Rashi explains that the tear is inside the socket; according to the Rambam, the tear is in the ligaments surrounding the joint. (See the illustrations in the Artscroll Hebrew edition, 54b, footnote 8.)
All the best,
Reuven Weiner