Arkansas Valley Endodontics Office Hello and welcome to Arkansas Valley Endodontics. Whether you were referred by your dentist, or discovered us on your own, we are happy that you are here. It is our hope that your transition into our practice (and your first appointment) will be as quick and as comfortable as possible. Dr. Westphal and his staff are committed to you, as our patient, to provide you the highest quality of service in an open, caring, and supportive environment. We are dedicated to the pursuit of excellence in patient care.