**5. Limitations of the Study**

Although the number of subjects included in the study was significant, the majority of the sample was represented by children and adolescents, and only 12 adults out of 200 patients were enrolled. This could be considered as a limitation of our study, in particular, in the analysis of the periodontal tissue condition.

Our research included the patients who visited the dental department of the Policlinico Tor Vergata (Rome, Italy). These subjects visited the hospital dental centre, since they experienced dental problems, but it is assumed that there are many migrants without dental problems, who consequently do not need dental care. This point could represent a selection bias.

## **6. Conclusions**

This observational study recorded poor oral health conditions among 200 migrants, from middle- and low-income countries, resident in Italy. It was demonstrated that the selected sample presented a high prevalence of dental caries, and a higher level of CPI was associated with a lower educational level.

Patient-oriented strategies and programmes are needed to improve the oral conditions of the migrant population.

**Author Contributions:** Conceptualization, data curation, writing—original draft preparation, writing review and editing: D.L. and G.M.; investigation: M.M.; methodology: V.C.; supervision: C.A.; validation: F.C. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the Italian Health Ministry project titled "Dental caries prevention and screening among socially vulnerable subjects with difficult access to care". Codice CUP E89C2000020001.

**Institutional Review Board Statement:** This study was approved by the Fondazione Policlinico Tor Vergata (Rome, Italy) ethical committee (approval number N. 0001919/2020 del 29/01/2020).

**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.

**Data Availability Statement:** Not applicable.

**Conflicts of Interest:** The authors declare no conflict of interest.

#### **References**

