What is the worst complication that you are aware of with resurfacing?
Fracture of the neck of femur. When it occurs, you get a stem with a big modular head. I have only one patient with this, but afterwards he is now, one of my happiest patients. In most of the series, all over the world, fractured neck of femur has an incidence of 1%.
What other complications might I be at risk for?
None more then with any other procedure: infection, nerve lesion, thrombosis, …, death?
The chance of unequal leg length or dislocation is much lower than in THA.