malocclusion

Some of the studies that evaluated the clinical effectiveness, such as the overjet, overbite, intercanine, and intermolar widths, arch length, and irregularity index, have indicated no significant difference between the two retainers (16, 18, 19).

Intraoral examination revealed that patient had Angle's Class II Division 1 malocclusion with overjet of 6 mm, an overbite of 30% [Figure 2].

When a normal or corrected overjet in retruded position was recorded, the active treatment finished and records of patients were taken including Cephalometric radiograph and study cast model.

Tooth crowding and spacing, as well as marked horizontal overjet, are the types of malocclusion that most affect individuals in the 9 to 14year age group (1,8).

Measurements taken each year were overjet, overbite; inter-canine width, canine length, inter-first deciduous molar width, inter-first premolar width, inter-first permanent molar width, arch length, molar depth, incisor irregularity, and available anterior space.

Class I molar and canine relation, ideal overbite and overjet were obtained at the end of treatment in all patients.

Reference marks were made on study models using 0.3mm fine liner black pointer for all the measurements like overjet, molar and canine relations.

The molar relationship, canine relationship, incisor relationship, horizontal incisal overlap (overjet in millimeter), vertical incisal overlap (overbite %), cross bite (lingual or buccal) and the arch form (square, oval or narrow) were recorded.

Una de las maloclusiones mas frecuentes y que causa mayor desarmonia facial, capaz de generar un impacto psicologico negativo, es la Clase II division 1, caracterizada por: retrognatismo mandibular, overjet aumentado, Clase molar y canina II, mordida profunda, perfil convexo, tercio inferior disminuido.

Factors such as age, gender, race, and overjet predispose dental trauma in maxillary anterior teeth with higher prevalence in the age groups between 2-3 years and 8-12 years [1, 2].