A simple mandibular bone cyst with remarkable tooth resorption

This article reports an unusual case of a simple mandibular bone cyst with remarkable tooth resorption and pain. An 18-year-old woman was referred to our oral and maxillofacial surgery and trauma clinic, complaining of pain in the left third mandibular molar region. A radiographic exam revealed a well-de-marcated radiolucent lesion in the left mandible with marked fi rst molar distal root resorption. Based on the differential diagnoses, an incisional biopsy was performed through a bone window, under local anesthesia. Surgical exploration revealed a simple bone cavity fi lled with sanguineous fl uid, with no cyst wall or tumoral tissue. Histopathological examination revealed thin, fi brous connective tissue with no epithelial coverage and permeated by extensive hemorrhage. Painful symptoms seemed to be caused by a caries lesion in the adjacent second molar and were resolved by tooth restoration with composite resin. A radiographic postoperative follow-up exam after two months suggests that there was complete bone healing and that tooth resorption had seemingly ceased. The fi nal diagnosis was a simple bone cyst with unusual tooth resorption.Este artigo relata um caso incomum de um cisto ósseo simples em mandíbula que apresentou reabsorção radicular e dor. Uma paciente do sexo feminino, com 18 anos de idade, foi encaminhada ao nosso serviço de cirurgia e traumatologia oral e maxilofacial com queixa de dor na região do terceiro molar inferior esquerdo. O exame radiográfico revelou uma lesão radiolúcida bem delimitada localizada na mandíbula esquerda com reabsorção acentuada da raiz distal do primeiro molar. Com base nos diagnósticos diferenciais, foi realizada biópsia incisional sob anestesia local por meio da exposição de uma janela óssea. A exploração cirúrgica da lesão revelou uma cavidade óssea simples preenchida com fluido sanguíneo, sem a presença de parede cística ou de tecido tumoral. O exame histopatológico revelou delicado tecido conjuntivo fibroso sem cobertura epitelial entremeado por extensa hemorragia. Os sintomas dolorosos pareciam ser provenientes de lesão de cárie no segundo molar. A queixa de dor cessou com a restauração do dente por meio de resina composta. O exame radiográfico após três meses de acompanhamento pós-operatório sugere completa reparação óssea e aparente interrupção da reabsorção da raiz dentária. O diagnóstico final foi cisto ósseo simples, acompanhado de incomum reabsorção do dente

Fibrous Dysplasia treated with virtual planning – report of two cases

Fibrous dysplasia (FD) is part of a rare group of bone dysplasia. It exhibits benign behavior and can lead to osteolytic lesions, deformities, and fractures. The treatment is challenging, and accurate removal of the lesion is necessary to restore function and esthetics. Here we present two cases of FD where virtual planning with presurgical computed tomography (CT) was used for the production of a surgical guide for bone contouring. First, CT image reconstruction was performed to mirror the patient’s original anatomy. Then, three surgical guides that determined the area and depth of bone wear were prepared and used in the relevant sequence during the actual surgeries, which were successfully performed in both patients. This technique is termed the template guide holes (TGH) technique. The findings from this report suggest that presurgical virtual planning and guide preparation allows direct and objective measurement of the level of bone wear and improves the functional and esthetic outcomes of surgery for FD. In particular, the TGH technique is safe and allows adequate preoperative surgical simulation, reduces the surgical duration, and increases the predictability of the final result

Ressecção completa do arco zigomático na fase de crescimento: estudo experimental em ratos

Foram avaliados, por meio de mensurações cefalométricas, os resultados decorrentes da ressecção unilateral total do arco zigomático em ratos Wistar. As ressecções foram realizadas com um mês de idade e os animais foram sacrificados com três meses de idade. O crânio e as hemimandíbulas foram submetidos, respectivamente às incidências radiográficas axial e lateral e, com base nestas, foram feitas mensurações por meio de um sistema de computador, comparando-se um lado com o outro, e os valores obtidos foram submetidos a análise estatística. Houve diferença significante na amplitude da fossa temporal mas não houve diferença significante para as demais mensurações da maxila. Houve diferença significante, a menor para a altura do corpo e comprimento da base da mandíbula no lado operado.The results obtained after total unilateral resection of the zygomatic arch in Wistar rats were evaluated by means of cephalometric measurements. The resection of the right zygomatic arch was carried out in one-month-old rats, and the animals were sacrificed two months later. The skull and hemimandibles were submitted to axial and lateral radiographic incidences. Based on the obtained radiographs, measurements were carried out by means of a computer system, which compared both sides of the specimens. The obtained values were submitted to statistical analysis. There was significant difference as to the extent of the temporal fossa, but there was no significant difference as to other measures of the maxilla. There was significant difference between both sides regarding the height of the body and the length of the base of the mandible

Biochemical study of the effects of cilostazol in rats subjected to acute ischemia and reperfusion of hind limbs

PURPOSE: To investigate whether cilostazol has a protective effect on acute ischemia and reperfusion of hind limbs of rats through study of biochemical variables in blood and urine. METHODS: Forty six animals were randomized and divided into two groups. Group I received a solution of cilostazol (10 mg/Kg) and group II received saline solution 0.9% (SS) by orogastric tube after ligature of the abdominal aorta. After four hours of ischemia the animals were divided into four subgroups: group IA (Cilostazol): two hours of reperfusion. Group IIA (SS): two hours of reperfusion. Group IB (Cilostazol): six hours of reperfusion. Group IIB (SS) six hours of reperfusion. After the reperfusion period, was held to collect urine and blood for biochemical measurements. The biochemical parameters studied were: urea, creatinine, sodium, potassium and myoglobin in blood and urea, creatinine, myoglobin in urine. RESULTS: There was no statistically significant difference between groups. CONCLUSION: Cilostazol had no protective effect on ischemic acute reperfusion of hind limbs of rats in this model

Em casas térreas com alcovas: formas de morar entre os setores médios em São Paulo, 1875 e 1900

Nosso objetivo é compreender quais eram as formas de morar das famílias de médias posses em São Paulo. Esse caminho será percorrido, sobretudo, procurando observar continuidades e transformações na moradia das camadas médias urbanas nas últimas décadas do século XIX, a partir do novo vocabulário formal que estava surgindo

ATLANTIC ANTS: a data set of ants in Atlantic Forests of South America

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