Comparison of Skeletal and Dental Changes with Hyrax-type Rapid Maxillary Expander Anchored to Permanent (6) Versus Deciduous Molars (V) in Growing Subjects
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Enrollment
- 34
- Locations
- 2
- Primary Endpoint
- Difference in skeletal maxillary width before/ after rapid maxillary expansion
Study Overview
Brief Summary
The aim of the study is to compare the skeletal and dental maxillary expansion obtained with an Hyrax tooth-borne expander anchored either on the 2nd deciduous molars (V) or on the 1st permanent molars (6)
Detailed Description
The aim of the study is to compare the skeletal and dental maxillary expansion obtained with an Hyrax tooth-borne expander anchored either on the 2nd deciduous molars (V) or on the 1st permanent molars (6).
The main objective is to compare at the skeletal level the distance between the cephalometric points, right jugal (RJ) and left jugal (JR) (maxillary base).
The secondaries objectives are performed at the dental level by measuring the distance between the maxillary first molars mesio-palatal cusp and the cuspids cups. Molar derotation is also assessed
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Diagnostic
- Masking
- None
Eligibility Criteria
- Ages
- 6 Years to 12 Years (Child)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Patient coming to the dental clinic for a first orthodontic consultation in mixed dentition
- •Patient aged 6 to 12 years
- •Patient with a transverse maxillary deficiency requiring rapid maxillary expansion
- •Presence of 1st permanent molars "6" and 2nd deciduous "V" molars with sufficient root length
Exclusion Criteria
- •Syndromic patients (all syndromes combined: cleft lip, etc.)
- •Patient with V or 6 with decays (or with major root resorption)
- •Patient with oral hygiene non compatible with orthodontic treatment
- •Failure to obtain informed written consent
- •No affiliation to a French national medical health system
- •Patient with a legal protection measure
Outcomes
Primary Outcomes
Difference in skeletal maxillary width before/ after rapid maxillary expansion
Time Frame: 6 months
Difference in skeletal maxillary width measured on frontal cephs (distance between the cephalometric points "right jugal RJ" and "left jugal JR" of the Ricketts analysis) before (V0)/after (V8) rapid maxillary expansion with tooth-borne expander type Hyrax
Secondary Outcomes
- Difference of the inter-molar distance before/after(6 months)
- Difference of the inter-canine distance before/after(6 months)
- Difference in the amount of molar derotation (inter-molar angle) before/after(6 months)
- Inter-operator reproducibility(1 month)