Why Intercusping Teeth Must Be Modified

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REASON TO We 17 INSURE 17 why intercusping teeth must be modified PROPER STABILITY The top section of the illustration shows a plank screwed down on two sup- ports. No matter where the load or force is exerted on this plank, it still remains fixed. So it is with a person's natural teeth. The center and bottom section show a plank, not screwed down but resting freely on its two supports... just as in artificial dentures. If the load or force is kept within or on the sup- ports, the plank will remain stable. As soon as the load or force gets beyond the support, the plank will tilt. The same applies to artificial restorations. The ridges in the mouth correspond to the supports illustrated and the same mechanical laws apply. If you want denture stability, the teeth must be so designed and set that the forces exerted against them will pass through the center of the ridge or lingual to it. Dr. French's Modified Posteriors are designed so that the forces ex- erted against them do pass through the center of the ridge or lingual to it-and without encroaching on the tongue space. In this way we make sure of denture stability. Write for new, illustrated technic booklet show- ing how. On your next case, specify DR. FRENCH'S MODIFIED POSTERIORS Universal Dental Company. 48th and Brown Streets Philadelphia, Pa. For the finest esthetic and functional results use Dr. French's Modified Posteriors and Nuform Anteriors

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DELPHIA NOV IS 9--PM 1935 BUY U.S. SAVINGS BONES ASK YOUR POSTMASTER Dr. H. H. Porter, Warren, Ill. || 150