Tooth abnormalities in pediatric patients submitted to antineoplastic treatment for central nervous system neoplasms / Anormalidades dentárias em pacientes pediátricos submetidos a tratamento antineoplásico para neoplasias do sistema nervoso central

Objective: The aim of this study was to evaluate the frequency of tooth abnormalities in pediatric patients treated for central nervous system neoplasms. Material and methods: This crosssectional study assessed thirty-one patients, median age 14.2 years (range 5 - 25), who were off therapy for at least one year, comparatively with a control group of thirty-one healthy patients matched for age with the study group. Tooth abnormalities were evaluated by panoramic radiographs. Results: There was no statistical significant evidence that patients of the study group (age range 5 - 25 years) have more frequency of tooth abnormalities comparatively with controls. However, in children who were diagnosed before five years of age, microdontia was the most common abnormality with statistically significant difference (P = 0.037). Root shortening grade III was observed in patients over 10 years of age at the time of radiographic examination, also with statistical significance (P = 0.046). Conclusions: There was no difference in the frequency of tooth abnormalities in pediatric patients treated for central nervous system neoplasms, comparatively with the control group. However, the findings of this study highlight the importance of giving parents and patients orientation about maintenance of good oral hygiene and proper treatment.

Objetivo: O objetivo deste estudo foi avaliar a frequência de anormalidades dentárias em pacientes pediátricos tratados para neoplasias do sistema nervoso central. Material e Métodos: Este estudo transversal avaliou trinta e um pacientes, com média de idade de 14,2 anos (entre 5 – 25 anos), que estavam fora de terapia há pelo menos um ano, comparativamente com um grupo controle composto por 31 pacientes saudáveis pareados por idade com o grupo de estudo. As anormalidades dentárias foram avaliadas por meio de radiografias panorâmicas. Resultados: Não houve evidência estatisticamente significante de que pacientes do grupo de estudo (entre 5 – 25 anos) apresentam maior frequência de anormalidades dentárias quando comparados aos pacientes do grupo controle. No entanto, em crianças diagnosticadas antes dos cinco anos de idade, microdontia foi a anormalidade mais comumente encontrada, com diferença estatisticamente significante (P=0.037). Encurtamento radicular grau III foi observado em pacientes com mais de 10 anos de idade ao exame radiográfico, também com significância estatística (P=0.046). Conclusão: Não houve diferença na frequência de anormalidades dentárias em pacientes pediátricos submetidos a tratamento antineoplásico para neoplasias do sistema nervoso central, comparativamente ao grupo controle. No entanto, os achados deste estudo ressaltam a importância de reconhecer os efeitos dentários tardios do tratamento antineoplásico em crianças com câncer e deste modo orientar pacientes e responsáveis sobre cuidados de higiene bucal e sobre opções de tratamento apropriado.

Dental anomalies in children submitted to antineoplastic therapy

Cancer is the third most frequent cause of death in children in Brazil. Early diagnosis and medical advances have significantly improved treatment outcomes, which has resulted in higher survival rates and the management of late side effects has become increasingly important in caring for these patients. Dental abnormalities are commonly observed as late effects of antineoplastic therapy in the oral cavity. The incidence and severity of the dental abnormalities depend on the child's age at diagnosis and the type of chemotherapeutic agent used, as well as the irradiation dose and area. The treatment duration and aggressivity should also be considered. Disturbances in dental development are characterized by changes in shape, number and root development. Enamel anomalies, such as discoloration, opacities and hypoplasia are also observed in these patients. When severe, these abnormalities can cause functional and esthetic sequelae that have an impact on the children's and adolescents' quality of life. General dentists and pediatric dentists should understand these dental abnormalities and how to identify them aiming for early diagnosis and appropriate treatment.

Dental approach in the pediatric oncology patient: characteristics of the population treated at the dentistry unit in a pediatric oncology brazilian teaching hospital

OBJECTIVES: The objective of this paper was to characterize the population seen at the dentistry unit of the hematology-oncology service of the Oncology-Hematology Service, Instituto da Criança at the Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo. Oral problems resulting from cancer therapy increase the risk of infection, length of hospital stay, treatment cost and negative impact on the course and prognosis of the disease. METHOD: Of the 367 medical records of cancer patients seen from November 2007 until December 2008: 186 with a cancer diagnosis and complete clinical data were selected, while 20 with a cancer diagnosis and incomplete records were excluded; 161 medical records with only hematological diagnosis were also excluded. The following characteristics were assessed: ethnicity, gender, age, diagnosis and characteristics of the neoplasm, cancer therapy status and performed dental procedures. RESULTS: Review of 1,236 visits indicated that 54 percent (n=100) of the patients had blood cancers, 46 percent (n=86) had solid tumors and 63 percent were undergoing anticancer therapy. The proportion of males (52.7 percent) in the study population was slightly greater. The most common cancer was acute lymphocytic leukemia (32.2 percent). Cancer occurred more often among those patients aged 5 to 9 years. The most common dental procedures were restorative treatment, preventive treatment and removal of infectious foci. CONCLUSION: The characteristics of the studied population were similar to those of the general Brazilian and global populations, especially regarding gender and diagnosis distributions. The aim of implementation of the dentistry unit was to maintain good oral health and patients' quality of life, which is critical to provide oral care and prevent future oral problems.