Lag screws should not be allowed to interfere with the plate. If possible, place them outside the plate’s footprint.
If screws must be underneath the plate, they should be countersunk flush with the bone surface. This is easier if smaller diameter screws are used.
Alternatively, the plate is applied before interfragmentary lag screws are placed through it, and across a sufficiently oblique fracture plane. Remember that axial compression by loading the plate, usually with the ATD or a push-pull screw, is necessary to achieve absolute stability for more transverse fracture planes. A plate that simply bridges such a fracture, without some form of interfragmentary compression, produces a high-strain environment that interferes with direct bone healing.