OBJECTIVE: To evaluate the effects of different time intervals activations on the non-surgical maxillary expansion in adults. Methods: This study will include two groups, 10 adult patients each (mean age 20-35) with maxillary transverse deficiency and unilateral or bilateral crossbite. In the first group, the expansion is going to be activated every four days. In the second group, activation will occur every eight days. The primary outcomes are transverse dimension, the buccal cortical bone formation, and the upper premolar and molar labial inclination. Dentoalveolar changes will be evaluated using CBCT images and digital models.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
20
A Banded Hyrax is going to be used in order to provide an increase in the maxillary transverse dimension
Fundación Universitaria UniCIEO
Bogotá, DC, Colombia
RECRUITINGTransversal distance between upper canines, first premolars and upper first molars
Distance between mesial fosa of each upper canines, first premolars and distance between central fosa of each upper first molars
Time frame: Change from baseline to 6 months
Posterior teeth buccal inclination
Measure in CBCT in a coronal slice between the palatal plane and the dental axis
Time frame: Change from baseline to 6 months
Buccal bone area evaluation
Measure in CBCT in a coronal slice, thickness of the buccal bone in upper first premolars and upper first molars
Time frame: Change from baseline to 6 months
Bleeding on probing (BP)
It's going to be measured by clinical exam with a periodontal probe and it is verified the presence of bleeding and it will be register as 0= No bleeding and 1= bleeding
Time frame: Change from baseline to 6 months
Evaluation of the perception of pain by the patient (VAS)
Pain visual analogue scale (AVS) - from 0 to 10 points, Higher values represent more pain perception by the participant
Time frame: Change from baseline to 6 months
Probing depth (PD)
Probing depth (PD): It's going to be measured by clinical exam with a periodontal probe and it is measured from the gingival margin to the bottom of the groove. It is considered the presence of a periodontal pocket when the depth of the groove is greater than 3mm.
Time frame: Change from baseline to 6 months
Clinical attachment level (CAL)
Linear measurement in mm. It is constructed from the relationship between probe depth (PD) and the measurement in millimeters from the cement enamel junction (CEJ) to the gingival margin
Time frame: Change from baseline to 6 months
Soft tissue recession (STR)
Soft tissue apical migration of the cement-enamel junction, it is going to classified as: Class I: Retraction of marginal tissue that does not extend to the mucogingival junction without loss of interdental tissue. Class II: Retraction of marginal tissue that extends to the mucogingival junction, or beyond it, there is no loss of bone, nor of interdental soft tissue.
Time frame: Change from baseline to 6 months
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