Construction has begun on a Cedar Rapids office building at the busy corner of Edgewood Road and 42nd Street NE that primarily will house dental practices.Parks and Schmit Orthodontics and Balster Pediatric Dentistry will occupy the second floor of the 22,482-square-foot, two-story building at 4150 Edgewood Rd. NE.Eastern Iowa Oral and Maxillofacial Surgery will have an office on the first floor.Dr.