Bensalem Steven Goldenberg, DDS, FAES 1044 Byberry Rd. 19020 215-638-3350 DrXtract@aol.com     Berwick Mark B. Kelchner DDS, PC General Practice 132 East Front St. 18603 570 752-2230     Butler Dennis Keyes, D.M.D. General Practice 1665 N.Main St. 16001 724-282-0808 drdk2@zbzoom.net     Harrisburg Heidi L. Myshin, DMD Prosthodontics 2151 Linglestown Road Suite 160B 17110 717-671-9000 myshpros@epix.net     Horsham Gary L. Henkel D.D.S. General Practice 215-672-6666 301 Horsham Rd., Suite G 19044 glh7767@erols.com     Philadelphia Max A. Listgarten, D.D.S. Periodontics 215-898-4615 Dental Care Center, Univ. of Penna 4003 Locust Street 19104 maxl@biochem.dental.upenn.edu     Pittsburgh Dr. Joseph G. DeFrancesco Oral Surgery 660 Lincoln Avenue 15202 412 766-1500 jdefrancesco@pol.net Steven R. Crandall 70 Fort Couch Rd. Upper St. Clair 15241 1-412-833-6166 src987@aol.com   Rosemont David Dutkowski, D.M.D. 985 East Lancaster Avenue 19010 (610) 527-4994 dutkowsk@biochem.dental.upenn.edu http://www.familyDENTIST.com