Table 1 Population, exposure, comparison, outcome, study design (PECOS) framework
Population | Children with mixed dentition |
|---|---|
Exposure | Orthodontic treatment with arch length preservation strategies in the mandibular arch |
Comparison | Untreated control group of children, children with treatment other than arch length preservation |
Outcomes | Mandibular second permanent molar eruption disturbances as evidenced radiographically |
Study design | Randomized control trials |
Prospective cohort studies | |
Retrospective studies |