Comparison between undergraduate dental students' self-assessment of pre-clinical crown preparation and assessment by two tutors

Abstract: objective: to determine the prevalence of carious lesions and gingivitis in 2- to 4-year-old children attending JUNJI daycare centers and urban municipal schools in the city of Valdivia, Chile. material and method: descriptive cross-sectional study. a population of 182 two-year-old children and 285 four-year-old children were examined. subjects were selected by stratified random sampling. all subjects were enrolled in daycare centers managed by JUNJI and municipal schools in the city of Valdivia. an oral examination was performed to measure the DMFT and hemorrhagic indexes according to the WHO diagnostic criteria. the presence of cavitated carious lesions and gingivitis was determined, resulting in descriptive statistics according to age and gender. results: the prevalence of caries was 12.6 percent in two-year-old children and 41 percent in four-year-olds, respectively. the prevalence of gingivitis was 36.8 percent at 2 years of age and 70.5 percent at 4 years. there were no significant differences by gender at 2 years of age (p=1) or at 4 years (p=0.37). two year-old children have significantly fewer carious lesions and gingivitis less frequently than four-year-olds (p=<.001). conclusion: two year-old children have a lower prevalence of carious lesions and gingivitis than four-year-old ones. no relationship between the variables and gender was found.

Root Canal Treatment of Three - Rooted Maxillary Second Premolar Done by Undergraduate Dental Student - A Case Report.

The possibility of a three rooted maxillary second premolar is extremely rare; diagnosis and treatment of such cases is challenging especially for undergraduate dental students. The aim of this report is to present a root canal treatment of a very rare case of a three rooted upper maxillary second premolar tooth done by an undergraduate dental student. The tooth was diagnosed as acute irreversible pulpitis. Visually the tooth morphologically looked as a normal premolar but radiographically revealed anatomical variations of three roots. Access cavity was opened carefully; three canals were detected, negotiated, biomechanically prepared and obturated by cold gutta percha lateral condensation technique. The tooth is now completely asymptomatic for almost five months and will be both clinically and radiographicaly monitored bimonthly. A correct radiographic and clinical examination based on knowledge of anatomical variation of this tooth is necessary for successful treatment and better prognosis. Under direct supervision, undergraduate clinical students can perform root canal treatment of difficult cases.