PRISMA flow diagram of study selection process.

<p>PRISMA flow diagram of study selection process.</p

Description of the Quality Assessment of Diagnostic Accuracy Studies tool (QUADAS) −2 [8].

<p>Description of the Quality Assessment of Diagnostic Accuracy Studies tool (QUADAS) −2 <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0074186#pone.0074186-Whiting1" target="_blank">[8]</a>.</p

Outcome measures of group B (studies focused on impacted teeth).

<p>ortho = orthodontist(s); pgs = postgraduate(s); dent = dentist(s); surg = dental surgeon; LHP = lateral headplate; OPT = orthopantomogram; CT = computer tomography; CBCT = cone beam computed tomography; MSCT = multi-slice computed tomography; 2D = two-dimensional.</p

Pubmed search strategy.

<p>Pubmed search strategy.</p

Proportion of studies with low, high, or unclear characteristics regarding ‘risk of bias.’

<p>Proportion of studies with low, high, or unclear characteristics regarding ‘risk of bias.’</p

Outcome measures of group A (studies not focused on impacted teeth).

<p>ortho = orthodontist(s); pgs = postgraduate(s); dent = dentist(s); period = periodontist(s); admini = administrative personnel; LHP = lateral headplate; OPT = orthopantomogram; 2D = two-dimensional.</p

Results of the quality assessment of the included studies using the QUADAS-2 instrument.

<p>Yes = Low Risk.</p><p>No = High Risk.</p><p>? = Unclear Risk.</p

Proportion of studies with low, high, or unclear characteristics regarding ‘applicability concerns.’

<p>Proportion of studies with low, high, or unclear characteristics regarding ‘applicability concerns.’</p

Methodological quality scores of studies using direct anthropometry for head circumference reporting on soft tissue–based quantitative longitudinal assessment of cranial dimensions in children until age 6 years with a score equal to or above 60% (n = 95) [24]–[118].

<p>  =  fulfilled the methodological criteria satisfactorily.</p><p>o  =  did not fulfill the methodological criteria.</p><p>.  =  not applicable.</p

PRISMA flow diagram of the study selection process.

<p>PRISMA flow diagram of the study selection process.</p