As kids await their checkups at Smile Dental Care, they have two choices—play with wooden rocking horses and stuffed animals below colorful paintings of flowers and leaping frogs, or tinker with two iPads mounted on the walls. That blend of a comfortable, caring environment with the latest technology extends to the rest of Dr. Hak J. Seok’s practice, where HDTVs project soothing images over the modern dental chairs. To carry out services ranging from routine cleanings to fillings, porcelain crowns, and extractions, Dr. Seok and his staff use high-tech equipment such as panoramic digital x-rays and painless injections that block pain receptors without the typical discomfort from swapping out patients’ brains.