Stability of Anterior Open Bite Treatment Using Extrusion Arches

Study Overview
=================
Brief Summary
-----------------
This study investigated treatment effects and stability of anterior open bite cases using extrusion arches

Official Title
-----------------
Treatment Results and Stability of Anterior Open Bite Cases Treated Using Extrusion Arches in Adults

Conditions
-----------------
Anterior Open Bite Malocclusion

Intervention / Treatment
-----------------
* Device: extrusion arch


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: adult patients above 18 years anterior open bite 2-6 mm full permanent dentition incisors requiring extrusion Exclusion Criteria: increased incisal show at rest gum show at smiling cleft patients patient with tempro-mandibular joint problems FMA angle above 45

Ages Eligible for Study
-----------------
Minimum Age: 18 Years
Maximum Age: 40 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Interventional Model Description: Before and after design
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: AOB adults<br>adult patients over 18 years having an anterior open bite of more than 2 mm, requiring incisors extrusion | Device: extrusion arch<br>* A stainless steel pre-formed arch wire custom made by placing V-bends 3-5 mm mesial to the molar tubes, placed into the auxiliary molar tubes after leveling phase and tied over the main arch wire distal to the lateral incisors<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| SNA angle | The anteroposterior position of maxillary base to the anterior cranial base. | 18 months | 
| SNB angle | The anteroposterior position of mandibular base to the anterior cranial base. | 18 months | 
| ANB angle | The anteroposterior position of maxillary base to the mandibular base. | 18 months | 
| SN-MP angle | Mandibular plane angle, the angle between the mandibular plane (Go-Me) and anterior cranial base plane (SN). | 18 months | 
| PP-MP angle | The angle between palatal plane (ANS-PNS) and mandibular plane. | 18 months | 
| AFH | Anterior facial height, the measurement between Nasion (N) and Menton (Me). | 18 months | 
| interincisal angle | - The inner angle between the long axis of the maxillary central incisor and long axis of mandibular central incisor. | 18 months | 
| L1 to MP in mm | - The perpendicular distance between the most anterior mandibular central incisor and mandibular plane. | 18 months | 
| L1 to MP angle | The angle between long axis of the most anterior central incisor and the mandibular plane. | 18 months | 
| overbite | Vertical distances between the incisal edges of the maxillary and mandibular central incisors, perpendicular to N-Me. | 18 months | 
| U1 to PP angular and linear measurements | -The angle and perpendicular distance between long axis of the most anterior upper central incisor and the Palatal plane (ANS-PNS). | 18 months | 
| u6 to pp angle | -The angle between the axis between mesial cusp tip and mesiobuccal root apex of the upper first molar and the palatal plane. | 18 months | 
| U6 to PP in mm | -The perpendicular distance between the mesial cusp tip of the upper first maxillary molar and the palatal plane. | 18 months | 
| L6 to MP angle | The angle between the axis between mesial cusp tip and mesial root apex of the lower first molar and the mandibular plane. | 18 months | 
| L6 to MP in mm | The perpendicular distance between mesial cusp tip of the lower first molar and the mandibular plane. | 18 months | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
extrusion arches, anterior open bite, stability, extrusion, intrusion