If either neck of femur should break in the years or decades to come, one would have to have a THR. This is one way of looking at the problem. Conversely, one could also argue that it would be  a good thing  to treat the potential complication at the time of index surgery itself when there is an opportunity to do so.
 
My personal opinion ( not backed by scientific data) is now that a properly done resurfacing may decrease the chance  of a femoral neck fracture by splinting the neck of femur with the peg of the resurfacing component. This is more true for a BHR than other resurfacing devices as it has a much more of a sturdy peg.

A patient a patient of mine, 37 female had polyarticular rheumatoid disease with low BMD. Due to the age , she of course had resurfacing. She was doing very well post op 8 weeks following surgery she fell down a flight of stairs. This was a very violent injury and she developed pain on the resurfaced hip.  One would be obviously inclined to think that she broke her neck of femur.  However to my pleasant surprise , she had a greater trochanter fracture and another fracture of the ant column of the acetabulum. These two fractures were on either side of the neck of femur. This means that the grossly violent force traversed the neck of femur and still it managed to hold. The most likely explanation would be the splinting of the neck by the peg of the resurfacing component. Other explanations are possible like the mechanism of injury for both fractures being different etc. though less likely.

However one cannot come to conclusions with an isolated case and such sporadic reports must be treated only as food for thought."
.....vijay bose