Hybrid tumors are very rare tumors composed of two different tumor entities, each of which conforms to an exactly defined tumor category. A 14-year-old boy was referred for an intraosseous painless lesion with a histopathological feature of multiple odontogenic lesions including calcifying odontogenic cyst, complex odontoma and ameloblastic fibro-odontoma. The final diagnosis considered to be a...

Structural changes in the ovaries of WBB6F1-Sl/Slt mutant mice aged 10, 25, 35, and 60 days and 7 months were studied light and electron microscopically. Neither secondary nor Graafian follicles could be found in any of the animals studied, and only primary follicles were usually seen until 35 days. In most follicles, the oocyte was lost. The hyperplastic proliferation of follicle epithelial ce...

Some professionals are reluctant to indicate orthodontic traction, especially for upper canines. Among the most common reasons for restricting the indication of orthodontic traction are: 1) Root resorption in lateral incisors and premolars. 2) External cervical resorption of the canines under traction. 3) Alveolodental ankylosis of the canine(s) involved in the process. 4) Calcific metamorphosi...

BACK GROUND The aim of this study was to determine the frequency of focal reactive hyperplastic lesions of the oral cavity as reported in the Department of Oral Pathology and Microbiology, Subharti Dental College, Meerut and to compare these data with those of previously reported studies from other regions and countries. MATERIAL AND METHOD Patient records of the Department of Oral Pathology ...

Purpose: To determine the regulation of the expression of osteoprotegerin and receptor activator of nuclear factor-kappa B ligand in human dental follicle cells by colony-stimulating factor-1, parathyroid hormone-related protein and bone morphogenetic protein-2. Materials and Methods: Primary human dental follicle cells were cultured. The fifth passaged human dental follicle cells were separate...

The discovery of dental stem cells received extensive attention because of its significance for the development of novel cellular therapies in dentistry. However, dental stem cells are also excellent for studies about cellular processes during dental tissue development or regeneration. Multipotent undifferentiated cells in the dental follicle (DFCs) are one example of dental stem cells. These c...

Received on: Feb 3, 2012 – Accepted on: Aug 3, 2012 ABSTRACT The calcifying cystic odontogenic tumor normally presents as a painless, slow-growing mass, involving both maxilla and mandible, primarily the anterior segment (incisor/canine area). It generally affects young adults in the third to fourth decades, with no gender predilection. Computerized tomography images revealed important characte...

The semaphorins are a large family of secreted or cell-bound signals needed for the development of the nervous system. We compared mRNA expression of class 3 semaphorins (Sema3A, 3B, 3C and 3F) and their two receptors (Neuropilin-1 and -2) in the embryonic mouse first molar tooth germ (E10-18) by radioactive in situ hybridization. All genes showed distinct developmentally regulated expression p...