Epidemiological Investigation of Malocclusion in China

ConditionsEpidemiological Investigation Malocclusion

Trial statusNot yet recruiting

Trial phaseNot listed

Trial typeObservational

Biological sexAll

Age4-20

SponsorShanghai Jiao Tong University School of Medicine

About this trial

Malocclusion is a kind of craniomaxillofacial complex deformity caused by heredity, environment, bad habits, trauma, inflammation, tumor and aging. Notably, the last comprehensive national prevalence data on malocclusion in China, which encompassed a significant sample size, dates back over two decades. Given the evolving nature of these epidemiological metrics, such as prevalence rates, it is imperative to update our understanding. Consequently, there is an urgent need for China to undertake a unified, standardized epidemiological survey of malocclusion with a substantial sample size to ensure accurate and timely data collection.

Eligibility criteria

This trial does not accept healthy volunteers

Qualifiers

Individuals with all genders;

Individuals with good general health;

Individuals with no history of orthodontic treatment or other maxillofacial surgical interventions;

Individuals who agree to and are willing to sign the informed consent form.

Disqualifiers

Individuals diagnosed with genetic or systemic disorders;

Individuals with a recent (within the past 3 months) history of maxillofacial trauma;

Individuals who are incapable of undergoing oral examinations or completing the necessary questionnaires.

Trial population

The study included four age groups: students aged 4-6 years (senior grade of kindergarten),9-11 years (fourth grade in primary school),13-15 years (eighth grade),and 17-20 years (freshman in college).

Trial design

Design model

Cohort

Time perspective

Cross-sectional

Treatments tested in this trial

Not listed

Trial groups

19,847 Participants

are grouped into 4 trial groups

Group A: Children aged 4 -6

Group B: Children aged 9 -11

Group C: Students aged 13 -15

Group D: Students aged 17-20

Trial outcomes

Primary outcomes

The Prevalence rate of malocclusion

The Index of Orthodontic Treatment Need and Dental Aesthetic Index were used to record the Malocclusion deformities,The Index of Orthodontic Treatment Need or Dental Aesthetic Index ≥3 is recorded as Malocclusion.The prevalence rate of malocclusion was the number of cases of Malocclusion /the total number of investigated cases during the research investigation.

Time frame