Localized Bone Loss Resulted from an Unlikely Cause in an 11-Year-Old Child.

Periodontal diseases have several causes, amongst them, by foreign bodies. In this case report, an 11-year-old child who lived in a rural area and has never been treated by a dentist presented an extensive horizontal bone loss and edema on the region of tooth 44. The diagnosis of foreign body was obtained after biopsy, since an elastic band around the middle of the root tooth was found. The elastic band was not radiopaque, and the patient did not inform that she found the elastic band on the floor of the school and introduced the tooth by herself. Based on the case reported, it is concluded that anamnesis and clinical and radiographic examination are fundamental strategies to obtain the diagnosis, but sometimes, especially in children, there may be inconsistencies that can be elucidated by a biopsy.

Effect of acidic challenge preceded by food consumption on enamel erosion.

OBJECTIVES: This in vitro study aimed to evaluate the effect of food consumption followed by acidic challenge on enamel erosion. METHODS: Seventy-five enamel blocks obtained from bovine teeth were divided randomly into five groups (n=15 per group): GI - erosion with previous immersion in milk; GII - erosion with previous immersion in cheese extract; GIII - erosion with previous immersion in liver extract; GIV - erosion with previous immersion in broccoli extract; and GV - erosive effect of cola drink (control). Over 24 h, the slabs were submitted to 3 pH-cycles, each consisting of immersion in the studied food (GI to GIV) for 5 min followed by immersion in a cola drink for 5 min, and subsequently, the slabs were stored in artificial saliva (110 min). At the end of the pH-cycles, the slabs were stored in artificial saliva for 18 h. Enamel alterations were assessed by profilometry (µm). Data were tested using ANOVA and Scott-Knott's tests (P<.05). RESULTS: Mean erosion depths for enamel (µm) were 0.46 in GI, 0.55 in GII, 0.64 in GIII, 0.54 in GIV, and 1.18 in GVI. Enamel loss by acidic challenge alone (GV) was significantly higher than when the acidic challenges were preceded by food extract immersion. CONCLUSIONS: The data suggest that all studied foods could minimize the erosive effect on enamel.