Contact Us Dr. Linda C. Niessen Corresponding Secretary & Editor, SCADA DENTSPLY International World Headquarters Susquehanna Commerce Center 221 West Philadelphia St. P.O. Box 872 York, PA 17405-0872 lniessen@dentsply.com phone: 717-849-4273 fax: 717-849-4760 Tammy A. Roland Professional Relations Coordinator DENTSPLY International World Headquarters Susquehanna Commerce Center 221 West Philadelphia St. P.O. Box 872 York, PA 17405-0872 troland@dentsply.com phone: 717-849-4274 fax: 717-849-4760