Locking plate principles | 合法醫療器材資訊網

3.Biomechanics·Conventionalscrews·Loadingforcesaretransmittedfromthebonetotheplate,acrossthefractureandbackintothebone.·Lockingheadscrews

When using a nonlocking plate and screws, the plate must be precisely adapted to the bone; otherwise, the tightening of the screws will lead to loss of reduction.

Note: in the top illustration, the plate is not well adapted to the outer cortex. The lower illustration shows that when the screws are inserted, the bone will be pulled to the plate, causing malreduction of the fracture.

Pearl: Very slightly over bending the plate can prevent this complication.