4 These habits may contribute to significant dental problems such as soft tissue injury, tooth loss, tooth wear, increased overjet
, anterior open bite, and posterior crossbite.
In group A with balanced occlusion, minimum of three point contacts, 2mm overjet
and 1mm overbite to keep a low angle of disclusion was established in anterior tooth setup to facilitate balanced occlusion in eccentric movement.
She also had Angle Class II malocclusion with retrusive upper and lower incisors, mildly increased overjet
, and severely increased overbite due to both upper- and lower-incisor overeruptions (Figure 1, 2).
There are several important benefits which have been referred to the early management of Class II malocclusion such as prevention of the development of dysfunction, avoidance of upper incisors trauma as a result of large overjet
, esthetic improvement, psychosocial advantages for the child during an important formative period of life, and better prediction for the adolescent phase of treatment.
It is suggested that the effects of occlusal, palatal, mandibular plane and overjet
on ANB or Wits can be determined in other studies.
is used to determine Angle's classification of molar relationships, so molar relationship was not evaluated directly.
Significant increases in ANB, MP-PP, SN-MP angles, ANS-Me, HR[perpendicular to]PNS, VR[perpendicular to]A, PP[perpendicular to]U1i measurements and overjet
and significant decreases in SNB, U1-SN angles, and VR[perpendicular to]B, VR[perpendicular to]L1i measurements and overbite were found in the RME group (group 2) during the expansion period (T1-T0) (p<0.
The possible disadvantages of this method are that an unpleasant open extraction space is created, the coincidence of the mandibular and maxillary dental midline is lost (8) a black triangle may form because of loss of the interdental papilla (9) and the extraction of mandibular incisors may compromise the ideal overjet
, overbite, and proper intercanine width in cases that do not have a Bolton (10) discrepancy, except for cases with small maxillary and large mandibular incisors.
Con base en lo anterior, se espera que la denticion temporal madura, presente arcos ovoides tipo I (con espacios), relacion molar con un leve escalon mesial o plano terminal recto, el cual permitira durante el desarrollo de la denticion permanente, llegar a una relacion clase I molar o normoclusion, caninos en relacion clase I, plano oclusal recto, Overbite de 20 a 40% y overjet
entre 1 y 2 mm.
En las fotografias laterales se aprecia mesioclusion molar y canina bilateral, overjet
y overbite disminuidos, y la presencia de mordida abierta y cruzada del lado derecho (figura 2).
This includes neck and oral cavity size (Kushida, Efron, & Guilleminault, 1997), tongue features (Weiss, Atanosov, & Calhoun, 2005) and overjet
(Miyao, Noda, Miyao, Yasuma, & Inafuku, 2008).
Intraoral conditions were evaluated on the basis of: canine classes, Angle's class and the volume of overjet