Simple bone cyst of the mandible report of two cases

Despite their names, simple bone cysts are no longer categorized as cysts since they lack an epithelial lining. However, their nature remains controversial. The internal structure is totally radiolucent, sometimes showing multilocular appearance, although the lesion does not contain true septa and the ridges of bone is produced by the scalloping effect. We presented two cases of histopathologically confirmed simple bone cyst. Radiographic features such as multilocular appearance and significant buccal and lingual expansion are not usual findings for simple bone cyst, whereas evident in our presented cases

Florid cemento-osseous dysplasia: report of three symptomatic cases

Florid cemento-osseous dysplasia [FLCOD] is a fibroosseous lesion that affects the jaw of middle-aged women. This lesion occurs more frequently in Black and Asians. A familial trend has been reported for some cases. This lesion may be completely asymptomatic and in such cases the lesion is detected in the radiographs incidentally. Radiographic features include multiple radiopaque masses, usually located in three or four quadrants or can be extensive throughout one jaw. However, when they are present in only one jaw, the mandible is the more common location. In this paper we report three cases of FLCOD that had evidences of infection as the first presentation

Dental radiographic findings of malignant osteopetrosis: report of four cases

Osteopetrosis is a rare skeletal disorder that results from a defect in the differentiation and function of osteoclasts. The lack of normally functioning osteoclasts results in abnormal formation of the primary skeleton and a generalized increase in the bone mass. This disorder is inherited as an autosomal recessive [osteopetrosis congenita] and an autosomal dominant trait [osteopetrosis tarda]. In this article, we report four cases of malignant osteopetrosis and describe the clinical and dental radiographic findings associated with this rare disease

[Radiogrphic evaluation of third molar developmental stages in a group of Iranian children and adolescents]

Basically as a matter of fact, it is important to determine the status of third molars before many of the children's dental treatment. The pattern of development and growth of face, jaw and teeth differs from race to race. Therefore, studies on the third molar status in each population seem to be an important issue. This study was performed to determine the pattern of the third molar development in a group of Iranian children and adolescents, in order to province a suitable reference for clinical use and future studies. In this descriptive study, 757 panoramic radiographs of patients, 6-16 years old, were investigated and the development of the third molars was categorized based on nine stages. The data were analyzed with chi-square and paired samples tests. The most important results of this study were: 1. The earliest and latest ages with the possibility of observing the signs of wisdom tooth crypt in panoramic radiographs, were six and 14 years respectively. 2. Among the investigated ages, the highest possibility of observing finding the first sign of third molar crypt emergence was found to be at the age of nine. 3. Possibility of the third molar existence after age of 10 reduces about 53% in comparison to the earlier ages. 4. There was a significant difference between age and the third molar developmental stage in each four quadrant [p=0.000]. Determination of the pattern of third molars development stages is useful in clinical diagnosis and comprehensive treatment plan

[Evaluation of the relationship between skeletal status and radiomorphometric indices of the mandible observed in panoramic radiography in women]

Since the age-related skeletal osteopenia has attracted much attention in recent studies and also because osteoporosis is the most common metabolic bone disease and the panoramic radiography is widely used for routine examinations, the relationship between radiomorphometric indices of mandibular bone [Panoramic Mandibular Index, PMI; the height of mandibular Inferior Cortex, IC [mm] and Mandibular Cortical Index, MCI] in panoramic radiography and skeletal status in femoral neck and lumbar spine [L[2]-L[4]] was evaluated in women referring to radiology department of Mashhad dental school. In this cross sectional analytical study, radiomorphometric indices of mandibular bone of 67 women over 35 years old referring to radiology department of Mashhad dental school were recorded. Women with a history of bone metabolism affecting diseases or drugs were excluded from our study. All the cases had a panoramic radiography in their orders. All of the patients were then referred to Toos Bone Densitometry Center for bone densitometry in left femoral neck and lumbar spine [L[2]-L[4]], using DEXA[1] technique with Osteocore apparatus. The patients were divided into three categories of normal, osteopenic and osteoporotic in each skeletal region according to their T-score. The data were analyzed by ANOVA and Pearson's correlation coefficient. Comparing average of bone mineral density between C[1] and C[3] subgroups of MCI, in postmenopausal females in femoral neck, a significant difference was detected [P-Value=0.04]. The average of PMI in the three different skeletal categories, was not different according to skeletal region and menstruation status [P-Value>0.05]. The results of this study showed that the use of radiomorphometric indices of mandible [especially MCI] can help to determine skeletal status of patients but is not enough for precise evaluation of patients' skeletal status