ABSTRACT Introduction: syphilis is a sexually transmitted disease with an annual incidence of 12 million people worldwide. In Brazil, there are increasing rates of infant mortality and incidence due to this disease. Objective: to report a case of primary syphilis with manifestation in the mouth. Case report: patient 50-years-old, male, homosexual with a complaint of an asymptomatic lesion on the lower left lip for about 2 months. In the intraoral physical examination, it was observed ulcerated lesion, with white-yellowish pseudomembrane, non-suppurative with hardened, elevated and badly-delimited edges measuring approximately 3 cm on the lower left lip. An incisional biopsy of the lesion was carried out and it was prescribed high doses of prednisolone, but without success. During follow-up, erythematous lesions target-shaped appeared in the palmar region and the resulting histopathological report showed ulcerated lichenoid cheilitis. Hematological exams confirmed positive for syphilis in the VDRL test. The treatment was penicillin G benzathine for 3 weeks. Conclusions: in the present case, the syphilitic lesion has clinical characteristics common to other diseases. Thus, dentists should know their clinical manifestations, that would aid in early diagnosis and treatment.

RESUMEN Introducción: La sífilis es una enfermedad de transmisión sexual con una incidencia anual de 12 millones de personas en el mundo. En Brasil, hay crecientes tasas de incidencia y mortalidad infantil por esa enfermedad. Objetivo: Describir un caso de sífilis primaria con manifestación en cavidad oral. Presentación del caso: Paciente masculino de 50 años de edad, homosexual, con queja de lesión sin dolor en el labio inferior izquierdo que había comenzado aproximadamente dos meses antes de asistir a la consulta. En la inspección clínica intraoral se observó lesión ulcerada, que medía aproximadamente 3 cm en el labio inferior izquierdo, con seudomembrana blanco-amarillenta, no supurativa, con bordes indurados, elevados y mal delimitados. Se tomó una biopsia de la lesión y se prescribieron altas dosis de prednisolona, pero sin éxito. Durante el seguimiento, lesiones eritematosas en “tiro al blanco” aparecieron en la región palmar y el estudio histopatológico reveló queilitis liquenoide ulcerada. Los exámenes hematológicos confirmaron positividad para sífilis en la prueba VDRL. El tratamiento fue penicilina G benzatínica por tres semanas. Conclusiones: En el presente caso la lesión sifilítica tenía características clínicas comunes a otras enfermedades. Por lo tanto, los dentistas deben conocer sus manifestaciones clínicas, que ayudarían en el diagnóstico y tratamiento tempranos.

Abstract Reports have indicated that serotonin plays an important role in cell migration and differentiation during the organogenesis of several tissues, including the oral types. Administration of selective serotonin reuptake inhibitor (SSRI) drugs during pregnancy could affect the delivery of serotonin to embryonic tissues altering its development. Objective This study aimed to assess the effects of fluoxetine, a selective serotonin reuptake inhibitor, on the formation of the periodontal ligament during pregnancy and lactation in rat pups. Material and Methods Twelve pregnant rats of Wistar lineage were divided into four study groups. In the control group, 0.9% sodium chloride solution was administered orally, throughout the entire period of the 21 days of pregnancy (CG group) and in the CGL group, it was administrated during pregnancy and lactation (from day 1 of pregnancy to the 21st day after birth). Fluoxetine was administered orally at the dose of 20 mg/kg in a group treated during pregnancy only (FG group), and during pregnancy and lactation (FGL group). Histometrical, histochemical and immunohistochemical analysis of the maxillary first molar periodontium region of the 24 rat pups was made under light microscopy, and periodontal ligament collagen was qualitatively evaluated under a polarizing light microscope. Results The quantity of fibroblasts (p=0.006), osteoblasts (p=0.027) and cementoblasts (p=0.001) was reduced in pups from the rats that received fluoxetine during pregnancy and lactation. No alterations were seen in the collagen fibers. Conclusion These findings suggest that periodontal tissue may be sensitive to fluoxetine, and its interference in reducing periodontal cells depends on exposure time during lactation.

AIM: To evaluate the morphological aspects of coronal dentinogenesis in the first molars of 1- and 5-day-old rats whose mothers were treated with fluoxetine hydrochloride during pregnancy. METHODS: Twelve pregnant Wistar rats were divided randomly into three groups: group C (control), group FL (fluoxetine administered at 10 mg/kg bodyweight), and group FX (fluoxetine administered at 20 mg/kg bodyweight). Saline (0.9%) solution or fluoxetine hydrochloride was administered subcutaneously for the first 21 days of pregnancy. Subsequently, the offspring of these animals was subdivided into subgroups according to age of tooth germ development to be studied: 1 and 5 days of life. C1 and C5 (control group 1 and 5 days of age); FL1 and FL5 (groups treated with 10 mg/kg fluoxetine at 1 and 5 days of age); FX5 and FX1 (groups treated with 20 mg/ kg fluoxetine at 1 and 5 days of age). RESULTS: No structural changes in the dentin-pulp complex of rats whose mothers were treated with fluoxetine hydrochloride were observed at either dose. CONCLUSIONS: Fluoxetine, at the doses administered during pregnancy in this study, did not alter the morphological development of the coronal dentin-pulp complex in their offspring.