Teeth retainers are custom-made dental appliances designed to maintain the alignment of teeth after orthodontic treatment. The fitting process typically begins with a dental impression, where dental putty or digital scanning technology creates a mold of the patient’s teeth. This impression is then used to fabricate a retainer tailored to the specific shape and alignment of the patient’s teeth. The retainer is adjusted as needed during the fitting appointment to ensure a comfortable and secure fit. Patients are instructed on proper care and usage, including how long to wear the retainer each day to maintain the desired alignment of their teeth.