I recommend Seoul Gomaun Dental Clinic in Ssangmun-dong.

I recommend Seoul Gomaun Dental Clinic located in Ssangmun-dong, Dobong-gu. It is a place where three specialized doctors in integrated dentistry, orthodontics, and restorative dentistry collaborate to provide treatment. They promise to minimize unnecessary tooth extraction to preserve natural teeth, so you can receive treatment without worrying about excessive procedures and feel at ease. From the front desk staff to the dental hygienists and the doctors, everyone is friendly and provides thorough and detailed explanations, even for someone like me who has extreme fear of dental treatment. All treatments are by appointment, so if you arrive on time for your scheduled appointment, you can receive treatment immediately without waiting, which is very convenient and great. They are closed every Sunday and public holidays, and treatments are available from 9:30 AM to 6:30 PM on weekdays. I recommend making a reservation in advance if you plan to visit.