Eight Units Extended Maxillary Fixed Retainer

Evaluation of the Dental Changes Associated With an Eight Units Extended Maxillary Fixed Retainer

Assessment of dental changes associated with an eight-unit extended maxillary fixed retainer in 3D. monitoring PDL response and evaluation of patient's satisfaction ,quality of life and speech with extended maxillary fixed retainer

single-arm prospective clinical trial will be conducted to assess of dental changes associated with an eight-unit extended maxillary fixed retainer in 3D. monitoring PDL response and evaluation of patient's satisfaction ,quality of life and speech with extended maxillary fixed retainer.

. Twenty-six patients who finished the active orthodontic treatment phase (14-28 years) will be recruited upon complying with the inclusion criteria. Eight-unit extended maxillary fixed retainer will be bonded to palatal surface of maxillary incisors, canines and first premolars, PDL assessment will be carried out and patient acceptance to the appliance through the valid questionnaire then the patients will be followed up for 6 months to document 3D post-treatment changes.

Inclusion Criteria:

• Patients who finished the active orthodontic treatment and started the retention phase.
• Both genders.
• Extraction and non-extraction cases

Exclusion Criteria:

• Patients who had active transverse palatal expansion.
• Patients with active periodontal disease.
• Patients with systemic disease and bone diseases, or craniofacial syndromes, or the presence of cleft.
• Patients with abnormal surface or morphological tooth structure or restorations.