Orthodontic conditions · Seoul
Orthodontic Conditions We Treat in Seoul
Crowding, gaps, deep bite, underbite, crossbite, open bite, facial asymmetry and more can usually be assessed in one 60-minute visit at Isu Yonsei Baro Orthodontics. Dr. Sally Chaekyung Lee uses 3D CT and facial scanning to find the cause, then explains treatment options in English.
Reviewed by Dr. Sally Chaekyung Lee, DDS, PhD · Updated October 2026
Group 1
Spacing and alignment
Problems with how much room the teeth have in the arch, and how each tooth sits within it.
Crowded teeth
Overlapping teeth from too little space, often treatable without extractions after careful planning.
Gap teeth
Spaces between teeth, including a front-tooth gap, closed with aligners or braces.
Rotated teeth
Teeth turned in their socket, which need controlled movement and stable retention.
Snaggletooth & high canines
Canines erupting high or outside the arch, guided into place with braces or aligners.
Missing-teeth space
Closing or opening space where a tooth is missing, coordinated with any future restoration.
Group 2
Bite problems
How the upper and lower teeth meet when you close, chew and speak.
Deep bite
Upper front teeth covering too much of the lowers, which can wear teeth and strain gums.
Overjet (buck teeth)
Upper front teeth sitting far ahead of the lowers, assessed for dental and skeletal causes.
Underbite
Lower teeth in front of the uppers; treatment depends on growth stage and jaw position.
Crossbite
Upper teeth biting inside the lowers, at the front or sides, sometimes linked to jaw width.
Open bite
Front or side teeth that do not meet, often related to habits, tongue posture or jaw pattern.
Midline shift
Upper and lower dental midlines that do not line up with each other or the face.
Group 3
Jaw and face
Conditions where the skeleton, lips and facial profile are part of the diagnosis.
Protruding mouth
Teeth and lips that sit forward of the profile, evaluated with facial scanning and 3D CT.
Facial asymmetry
Uneven jaw or smile, separated into dental and skeletal components before planning.
Gummy smile
Excess gum display when smiling, which orthodontics may improve depending on the cause.
TMJ and orthodontics
How jaw-joint symptoms relate to the bite, and when orthodontic care is or is not appropriate.
Group 4
Other conditions
Impacted canine
A canine that has not erupted, located on 3D CT and often guided in with surgical exposure.
Relapse after braces
Teeth that shifted after earlier treatment, and what re-treatment and retention involve.
Mouth breathing in children
How breathing habits can relate to jaw growth, and when an early orthodontic check helps.
FAQ
Questions about orthodontic conditions
How do I know which condition I have?
Many people have more than one issue, such as crowding with a deep bite. A diagnosis needs an in-person exam with digital scans, X-rays or 3D CT and photos. At Isu Yonsei Baro, Dr. Lee reviews teeth, bite, roots, skeleton and facial balance in about 60 minutes and explains findings in English.
Can bite problems be treated in adults?
Often, yes. Teeth can move at any age when gums and bone are healthy. Some skeletal problems in adults may need surgery combined with orthodontics, while many dental bite issues can be managed with braces or aligners. Individual results vary; treatment is decided after examination.
When should a child be checked for jaw or bite problems?
An early check during the mixed-dentition years can show whether growth-related issues like underbite, crossbite or mouth breathing need monitoring or early treatment. The clinic uses growth-plate analysis to help time care. See kids' early orthodontics.
Will I need teeth removed to fix crowding or protrusion?
Not always. Depending on space needs and facial profile, options may include arch development or molar distalization with temporary anchorage devices. Dr. Lee has published research on non-extraction distalization. Whether extraction is needed is decided only after a full diagnosis.
Talk to Dr. Lee in English
Describe what concerns you about your teeth or bite, and book an exam to get a clear diagnosis, options and a written estimate. Isu Station Exit 2, Seocho-gu, Seoul.