This study investigated treatment effects and stability of anterior open bite cases using extrusion arches
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
23
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
Alexandria faculty of Dentistry
Alexandria, Egypt
SNA angle
The anteroposterior position of maxillary base to the anterior cranial base.
Time frame: 18 months
SNB angle
The anteroposterior position of mandibular base to the anterior cranial base.
Time frame: 18 months
ANB angle
The anteroposterior position of maxillary base to the mandibular base.
Time frame: 18 months
SN-MP angle
Mandibular plane angle, the angle between the mandibular plane (Go-Me) and anterior cranial base plane (SN).
Time frame: 18 months
PP-MP angle
The angle between palatal plane (ANS-PNS) and mandibular plane.
Time frame: 18 months
AFH
Anterior facial height, the measurement between Nasion (N) and Menton (Me).
Time frame: 18 months
interincisal angle
\- The inner angle between the long axis of the maxillary central incisor and long axis of mandibular central incisor.
Time frame: 18 months
L1 to MP in mm
\- The perpendicular distance between the most anterior mandibular central incisor and mandibular plane.
Time frame: 18 months
L1 to MP angle
The angle between long axis of the most anterior central incisor and the mandibular plane.
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Time frame: 18 months
overbite
Vertical distances between the incisal edges of the maxillary and mandibular central incisors, perpendicular to N-Me.
Time frame: 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).
Time frame: 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.
Time frame: 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.
Time frame: 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.
Time frame: 18 months
L6 to MP in mm
The perpendicular distance between mesial cusp tip of the lower first molar and the mandibular plane.
Time frame: 18 months