Statics according to the laws of balance and leverage.
Example: - Kennedy Class II - Upper unilateral - free-end saddle
Static balance is attained by slightly reducing the load arm (e.g. by positioning the last molar out of contact). An indirect occlusal rest, away from the free-end saddle, improves the statics and prevents the premolars from tipping.
The final base design is an achievement of static balance and yet delicate, elegant design.
Example: - Kennedy Class II - Lower unilateral - free-end saddle
Indirect occlusal rest at free-end saddle. Direct occlusal rests at the unilateral gap.
Maximum extension of the saddle zone at the free-end saddle. Strong, rigid connection at the lingual bar.
