Class II Malocclusion Clinical Trial
Official title:
Effect of Maxillary Third Molar Extraction vs Non-extraction on Distalization of First Molars in a Group of Adolescent Patients Using Infra-Zygomatic Gear Distalizer: A Randomized Clinical Trial
Verified date | December 2022 |
Source | Future University in Egypt |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Interventional |
There is a scarcity in literature regarding the influence of maxillary third molar on distalization . This study aimed to compare the influence of unerupted maxillary third molars and their extraction on the bilateral distalization of upper first molars using the infra-zygomatic gear distalizer
Status | Completed |
Enrollment | 22 |
Est. completion date | January 15, 2022 |
Est. primary completion date | January 15, 2022 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Female |
Age group | 16 Years to 19 Years |
Eligibility | Inclusion Criteria: - Adolescent patients aged 16-19 years - skeletal Class I - bilateral Class II molar relationship. defined by at least an end-to-end molar relationship. - normal vertical growth pattern. - full permanent dentition with unerupted upper third molars. Exclusion Criteria: - skeletal Class II or Class III relationship. - past orthodontic treatment. - poor oral hygiene. - Increased vertical dimension. |
Country | Name | City | State |
---|---|---|---|
Egypt | Future University in Egypt | Cairo |
Lead Sponsor | Collaborator |
---|---|
Future University in Egypt |
Egypt,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | distalization amount of maxillary firs molars at the crown and root levels | Anteroposterior changes in the position of maxillary first molars assessed on digitized models and cone beam computed tomography (CBCT) taken for each patient before and after distalization. Measurements were done by identifying landmarks, reference lines, and planes(measured in mm) | From pre to post distalization (an average of 8 months) | |
Secondary | Rate of maxillary first molar Distalization | Incremental changes in the antero-posterior position of maxillary first molars assessed on digitized models taken for each patient before and after distalization and in each follow up visit. Measurements were done by identifying landmarks, reference lines, and planes (measured in mm) | From pre- to post-distalization (an average of 8 months) | |
Secondary | Tipping of maxillary first molar | Angular changes of maxillary first molar assessed on cone beam computed tomography (CBCT) taken for each patient before and after distalization. Measurements were done by identifying landmarks, reference lines, and planes(measurement of the angles in degrees). | From pre- to post-distalization (an average of 8 months) | |
Secondary | Vertical position of maxillary first molar | vertical positional changes of maxillary first molar assessed on cone beam computed tomography (CBCT) taken for each patient before and after distalization. Measurements were done by identifying landmarks, reference lines, and planes (measured in mm) | From pre- to post-distalization (an average of 8 months) | |
Secondary | Inter molar width | Changes in the transvers distance between the right and left upper first molars assessed on digitized models taken for each patient before and after distalization. Measurements were done by identifying landmarks, reference lines, and planes (measured in mm) | From pre- to post-distalization (an average of 8 months) | |
Secondary | Molar rotation | Study models that are taken pre and post retraction (then digitalized) will be used to assess the rotation of the maxillary first molars in relation to a reference line (measurement of the angles in degrees) | From pre- to post-distalization (an average of 8 months) | |
Secondary | Tipping of maxillary second molar | Angular changes of maxillary second molar assessed on cone beam computed tomography (CBCT) taken for each patient before and after distalization. Measurements were done by identifying landmarks, reference lines, and planes. (measured in of in degrees) | From pre- to post-distalization (an average of 8 months) | |
Secondary | Tipping of maxillary third molar | Angular changes of maxillary third molar assessed on cone beam computed tomography (CBCT) taken for each patient before and after distalization. Measurements were done by identifying landmarks, reference lines, and planes (measurement of the angles in degrees) | From pre- to post-distalization (an average of 8 months) | |
Secondary | Vertical position of maxillary third molar | Vertical positional changes of maxillary third molar assessed on cone beam computed (measured in mm)tomography (CBCT) taken for each patient before and after distalization. Measurements were done by identifying landmarks
, reference lines, and planes (measured in mm) |
From pre- to post-distalization (an average of 8 months) | |
Secondary | Vertical position of upper incisors | Vertical positional changes of upper incisors assessed on cone beam computed tomography (CBCT) taken for each patient before and after distalization. Measurements were done by identifying landmarks, reference lines, and planes (measured in mm) | From pre- to post-distalization (an average of 8 months) | |
Secondary | Anteroposterior position of upper incisors | Antero-posterior change in the anteroposterior position of upper incisors assessed on cone beam computed tomography (CBCT) taken for each patient before and after distalization. Measurements were done by identifying landmarks, reference lines, and planes (measured in mm) | From pre- to post-distalization (an average of 8 months) | |
Secondary | upper incisors torque | Angular changes of upper incisors assessed on cone beam computed tomography (CBCT) taken for each patient before and after distalization. Measurements were done by identifying landmarks, reference lines, and planes (measurement of the angles in degrees) | From pre- to post-distalization (an average of 8 months) | |
Secondary | Anteroposterior changes of upper first and second premolars | Antero-posterior change in the position of maxillary first and second premolars assessed on digitized models taken for each patient before and after distalization. Measurements were done by identifying landmarks, reference lines, and planes (measured in mm) | From pre- to post-distalization (an average of 8 months) |
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