Offer Valid: 1/1/13 - 9/30/13 Buy 3 Cavitron Inserts, Get 1 Free! Or Buy 5 Cavitron Inserts, Get 2 Free! Excludes 2-packs and 3-packs. To receive your free goods mail your Patterson invoice noting free product(s) desired to: DENTSPLY Professional, 1301 Smile Way, York PA 17404 or fax to 1-800-278-4344. Purchase must be made on ONE (1) invoice. Limit 5 redemptions of each offer per Doctor. These offers may not be combined with any other DENTSPLY offers or contract agreements. All free goods fulfilled through DENTSPLY. Free Goods must be of equal or lesser value than those purchased. Invoices must be received no later than 10/31/13.