Pharyngeal Airway Dimensions With Twinblock Versus Myobrace Appliances in Developing Skeletal Class II Patients

Alexandria University26 enrolled

Overview

The goal of this clinical trial is to compare the pharyngeal airway changes after treatment with Myobrace and after treatment with Twinblock in developing skeletal Class II patients. The main question it aims to answer is: Is the efficacy of the twin-block Vs Myobrace appliances in the improvement of pharyngeal airway dimensions in adolescents having skeletal Class II malocclusion with retrognathic mandible utilizing sagittal pharyngeal airway area measurements.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Malocclusion, Angle Class II, Division 1

Interventions

Myobrace Functional ApplianceDEVICE

An Appliance for treating growing Class II patients with mandibular deficiency

Twin BlockDEVICE

An Appliance for treating growing Class II patients with mandibular deficiency

Eligibility

Sex: ALLMin age: 9 YearsMax age: 12 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Healthy children * 9-12 Years * Skeletal Class II with mandibular defeciency and normal maxillary growth depending on clinical diagnosis and confirmed with lateral cephalometric x-reay readings ( ANB angle \>4 and SNA angle \<78) Exclusion Criteria: * Previous Orthodontic treatment * Previous extractions * mandibular shifts * Severe Crowding * Anterior open bite * Any perioral habits

Locations (1)

Ahmed Median

Alexandria, Egypt

Outcomes

Primary Outcomes

SNA

Angle formed between points Sella, Nasion and A point and describes anteroposterior position of the maxilla relative to the anterior cranial base.

Time frame: Six months

SNB

Angle formed between points Sella, Nasion and B point and describes anteroposterior position of the mandible relative to the anterior cranial base.

Time frame: Six months

ANB

Angle formed between points A, Nasion and B point indicating the skeletal relationship between the maxilla and the mandible.

Time frame: Six months

Witts appraisal

The linear distance between the perpendicular projections of points A and B over the functional occlusal plane.

Time frame: Six months

FMA

Angle formed between mandibular plane and Frankfort horizontal plane.

Time frame: Six months

Pharyngeal air way area measurement

The upper border of Naso Pharyngeal air way area will be delineated by a line extending from the harmonium (H) to the posterior nasal spine. The lower extent of the NPAA will be traced by marking a line at the tip of the soft palate parallel to the Frankfort horizontal (FH) plane extending to the posterior wall of the pharynx. The OPAA and LPAA are differentiated by a line drawn at the level of the tip of epiglottis parallel to the FH plane to the posterior wall of the pharynx. The lower border of the LPAA is defined as a line drawn parallel to FH plane and passing through the anteroinferior most point (C5AI) of the fifth cervical vertebra. Area will be measured.

Time frame: Six months

Data from ClinicalTrials.gov

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