WHAT DOES ทํารีเทนเนอร์ MEAN?

: a device or composition that holds anything set up: like a : the part of a dental substitute (like a bridge) by which it is actually made fast to adjacent pure teeth b : a dental appliance accustomed to keep enamel in proper position In particular following orthodontic treatment methodสำหรับข้อเสีย คือ ปรับ