Evaluation of two types of treatment for adolescent patients with protrusion of lower jaw and constriction of upper jaw

Not Applicable

Recruiting

• Conditions: a maxillary constriction skeletal class III malocclusion; a maxillary constriction; skeletal class III malocclusion; Oral and Gastrointestinal - Other diseases of the mouth, teeth, oesophagus, digestive system including liver and colon

• Registration Number: ACTRN12622000310763
• Lead Sponsor: niversiti Sains Malaysia

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Start: 2022-02-18
• Last Update Posted: 3 June 2024

Recruitment & Eligibility

• Status: Recruiting
• Sex: All
• Target Recruitment: 42

Inclusion Criteria

Inclusion criteria
(1) Angle’s class III malocclusion
(2) Anterior crossbite on two teeth or more or an edge-to-edge bite with or without an anterior shift of the mandible during the closure
(3) Skeletal class III relationship judged clinically and confirmed radiographically (– 4 < ANB < + 1)
(4) Normal inclination of the lower incisors with an incisor mandibular plane angle (IMPA) not exceeding 100° and not less than 85°
(5) An indication for maxillary expansion (maxillary constriction)
(6) Growing patients between 12 and 15 years.
(7) Permanent dentition
(8) No craniofacial syndromes or cleft lip and/or palate abnormalities
(9) Absence of supernumerary teeth or missing teeth except for the third molars
(10) No previous orthodontic treatment.

(11) Malaysian patients.

Exclusion Criteria

Exclusion criteria
• (1) Skeletal class III relationship caused predominantly by maxillary deficiency (SNA angle should have been less than 78 with a normal SNB angle)
• (2) Severe skeletal class III resulting primarily from mandibular prognathism (ANB less than – 4° with no functional shift on closure)
• (3) Patients with diseases that prevent the application of mini-implants (e.g., osteoporosis – treated with cortisone and its derivatives- treated with radiation)
• (4) A convergence between the roots of the canine and first premolar assessed radiographically
• (5) Facial asymmetry (more than 2 mm of deviation of the mandibular midline from the facial midline)
• (6) MM angle greater than 35° or SN-MP angle greater than 40°.
• (7) One of the parents is not Malaysian.

Study & Design

• Study Type: Interventional
• Study Design: Not specified