COLUMBUS, Ohio - Chris Collier has been a patient of Dr. Dave Rummel for 30 years. When it comes to teeth, Collier is more concerned about his health than his smile. "The reason I come here is because I know I can trust the dentist I have," Collier said. "I know I can get good workmanship." SLIDESHOW: Images From Report Rummel is one of the few dentists in central Ohio who makes his own crowns, bridges and dentures, but most other dentists rely on outside dental labs, 10 Investigates' Lindsey Seavert reported. The labs can be down the street or...