Surgical management of a failed internal root resorption treatment: a histological and clinical report.

This article presents the successful surgical management of a failed mineral trioxide aggregate (MTA) orthograde obturation of a tooth with a history of impact trauma and perforated internal root resorption. A symptomatic maxillary lateral incisor with a history of perforation due to internal root resorption and nonsurgical repair using MTA was referred. Unintentional overfill of the defect with MTA had occurred 4 yr before the initial visit. The excess MTA had since disappeared, and a radiolucent lesion adjacent to the perforation site was evident radiographically. Surgical endodontic retreatment was performed using calcium enriched mixture (CEM) cement as a repair material. Histological examination of the lesion revealed granulation tissue with chronic inflammation, and small fragments of MTA encapsulated within fibroconnective tissue. At the one and two year follow up exams, all signs and symptoms of disease had resolved and the tooth was functional. Complete radiographic healing of the lesion was observed two years after the initial visit. This case report illustrates how the selection of an appropriate approach to treatment of a perforation can affect the long term prognosis of a tooth. In addition, extrusion of MTA into a periradicular lesion should be avoided.

A 10-year retrospective study on odontogenic tumors in Iran.

OBJECTIVE: The aim of this study was to review cases of odontogenic tumors diagnosed in two pathology centers in Tehran, Iran, during a 10-year period. STUDY DESIGN: Patients' records were seen at two teaching pathology Centre's of Shahid Beheshti University between the months of March 2000 to 2010 with histologic diagnosis of any type of odontogenic tumors. The records were analyzed for frequency, age, sex, site, as well as clinical, radiographic and histopathologic findings. RESULTS: Of 30706 biopsies, 4767 (15.5%) cases were diagnosed as oral and maxillofacial lesions. Among these, 720 cases were tumoral with 188 (26.1%) cases of odontogenic tumors. Tumors with odontogenic epithelium origin formed 70.2% of total numbers of odontogenic tumors. Mixed odontogenic tumors and tumors of odontogenic ectomesenchyme comprised 12.2% and 17.5% of the cases respectively. Ameloblastoma, with a frequency of 62.2% was the most common tumor in this review which was followed by odontoma and odontogenic myxoma. CONCLUSION: Although there are few studies on odontogenic tumors in literature, the comparison of our results with existing data shows significant differences in the distribution of tumors and age of patients, which may be due to ethnic features and geographic distribution of patients. Future studies on other ethnic groups are essential for further clarification of the findings in this research.

Massive craniofacial intraosseous vascular malformation resembling cystic angiomatosis: report of 2 cases and review of the literature.

Cystic angiomatosis of bone is a rare condition of multifocal angiomas of the skeleton. The condition is believed to be congenital, grows slowly and starts in first decades of life. Two cases of progressive bimaxillary enlargement, presented here with a history of slowly enlargement of facial bones when they were 9 and 6 year old, respectively. Radiographic evaluation of the craniofacial bones revealed aggressive hypertrophy with severe displacement of the teeth. The histopathological evaluation of the gross specimen showed vital bone containing capillary and cavernous spaces with endothelial lining. Aggressive cystic angiomatosis of the facial bones was described here as the most probable diagnosis.

A 10-year retrospective study on malignant jaw tumors in Iran.

OBJECTIVE: The aim of this study was to review cases of malignant tumors of jaw bones diagnosed in 2 pathology centers in Tehran, Iran, during a 10-year period. MATERIALS AND METHODS: Patients' records were seen at 2 teaching pathology centers of Shahid Beheshti University between March 1999 and March 2009 with histologic diagnosis of any type of malignant jaw tumors. The records were analyzed for frequency, age, sex, site, as well as clinical, radiographic, and histopathologic findings. RESULTS: Of 30,706 biopsies, 4767 (15.5%) were diagnosed as oral and maxillofacial lesions. Among these, 720 cases were tumoral and 67 cases were malignant jaw tumors. Osteosarcoma (41.79%) was the most common tumor in this review, which was followed by mucoepidermoid carcinoma and ameloblastic carcinoma, respectively. Patients' ages ranged from 9 to 71 years, with a mean of 38 years and male predominance. CONCLUSIONS: There are limited studies on malignant jaw tumors in literature, but comparing our result with the available data, there were differences regarding frequency and age distribution. This may be related to racial and geographic characteristics. More studies on other population are needed.

Dentin dysplasia type I: a case report and review of the literature.

INTRODUCTION: Dentin dysplasia is a rare hereditary disturbance of dentin formation characterized by defective dentin development with clinically normal appearing crowns, severe hypermobility of teeth and spontaneous dental abscesses or cysts. Radiographic analysis shows obliteration of all pulp chambers, short, blunted and malformed or absent roots and peri-apical radiolucencies of non carious teeth. CASE PRESENTATION: We present a case of dentin dysplasia type I in a 12-year-old Iranian boy, and the clinical, radiographic and histopathologic findings of this condition and treatment are described. CONCLUSIONS: There are still many inconclusive issues in the diagnosis and management of patients with dentin dysplasia. The diagnostic features of this rare disturbance will remain incompletely defined until additional cases have been described. Early diagnosis of the condition and initiation of effective regular dental treatments may help these patients to prevent or delay loss of dentition.