The bullying (Al-Omari et al, 2014) poorer oral

The width, length and depth of dental archeshave had
considerable implications in orthodonticdiagnosis and treatment planning in a
moderndentistry based on prevention and early diagnosisof oral disease (Carter
et al, 1998).

Malocclusion has been associated
with bullying (Al-Omari et al, 2014) poorer oral health-related quality of life
(Scapini et al, 2013) and self-dissatisfaction with appearance (Tessarollo et
al, 2012). Therefore, early diagnosis and treatment of malocclusion may be
useful for many patients. Early treatment in orthodontics is the intervention
in the primary, early mixed (permanent first molars and incisors present), or
mid mixed dentition period (before emergence of first premolars and permanent
mandibular canines) with removable or fixed appliance (Ghafari et al, 1998).
Several studies have shown that early orthodontic treatment can significantly
reduce the complexity of some cases (Dugoni, 1998; Brennan et al, 2000; Keski-Nisula
et al, 2008). Therefore, it is essential to know the characteristics of
different types of malocclusions in order to create an appropriate treatment
plan.

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During the mixed dentition, the changes thatoccur in
the dental arches are consequences

of
tooth movement and growth of supportingbone, besides modest genetic component (Cassidy et al, 1998).
Thesenaturally occurring changes, which happen inuntreated individuals, have
been used for manytimes, as comparative “gold standards”, whichhave been
employed to assist the diagnosis and orthodontic planning (Carter et al, 1998).

There are studies that have
investigated arch dimension of each malocclusion type (Lux et al, 2003; Isik et al,
2006; Chen et al, 2007; Slaj
et al, 2010). However, many of these studies were done in permanent dentition,
with a limited number of subjects, or without clear inclusion criteria; this
had led to conflicting results of the literature. Accordingly, this review of
the literature will attempt to demonstrate the controversies that exist in the
current literature regarding the arch dimensions of each malocclusion type. 2

This
review will begin with a brief review of normal development in mixed-dentition,
normal development of arch width and arch depth, followed by literature
reporting arch dimensions of Class II division 1, Class II division 2, and
Class III malocclusions, as well as gender dimorphism.