Dental developmental alterations in patients with dilacerated teeth.

Background: The aim of this study was to record and analyze all DDAs associated to dilacerated teeth in patients attending the clinics of the Postgraduate Division, Facultad de Odontología, UNAM in Mexico City.

Material And Methods: Orthopantomograms from all patients seeking for stomatological attention in our institution were reviewed and those cases of dilaceration were separated. Age, gender, diagnosis, location, involved teeth and associated DDAs were recorded and analyzed.

Squamous cell carcinoma of the tongue in patients older than 45 years.

This study aims to evaluate the clinicopathological features, TNM status, AJCC staging and behavior of squamous cell carcinoma of the tongue (SCCT) in patients older than 45 years. The files of the Department of Pathology of the Hospital General de México were reviewed and all cases of SCCT in patients older than 45 years were selected. Clinicopathological features, treatment, follow-up, microscopic diagnosis, and IJCC and TNM staging were retrieved.

Idiopathic osteosclerosis in the maxillomandibular area.

Objectives: To test a more complete set of morphometric radiographic parameters to evaluate the idiopathic osteosclerosis (IO) lesions located in the maxillomandibular area and to know their features during routine radiographic evaluation.

Materials And Methods: Radiographs from patients attending the oral diagnosis clinic of our institution were reviewed. Evaluated parameters were gender and age of the patients, size, side, homogeneity, morphology, radiodensity, mineralization, borders, relation to roots, affected tooth or teeth and location of the analyzed lesions.

Frequency of dilaceration in a mexican school-based population.

Background: The aim of this study was to record the frequency of dilaceration in patients attending our institution and to analyze the possible associated factors.

Material And Methods: Orthopantomograms from all patients attended in our institution were reviewed and those cases of dilaceration were selected. Documented data were age, gender, diagnosis, location and involved teeth.

Length of the ossified stylohyoid complex and Eagle syndrome.

Purpose: To assess radiographically the presence of an ossified stylohyoid complex (OSHC) with signs and symptoms of Eagle syndrome or other oro-facial painful diseases in patients attending our institution and to confirm that the important issue for study is to know the length of the ossificated portion of the stylohyoid complex only.

Methods: We separated 1000 consecutive files, and after selection, 922 panoramic radiographs were evaluated. Assessed parameters were gender and age of the patients, size, and location of the analyzed OSHCs.

Maxillomandibular giant osteosclerotic lesions.

Introduction: Giant Osteosclerotic Lesions (GOLs) are a group of rarely reported intraosseous lesions. Their precise diagnosis is important since they can be confused with malignant neoplasms.

Objective: This retrospective study aimed to record and analyze the clinical and radiographic Giant Osteosclerotic Lesions (GOLs) detected in the maxillomandibular area of patients attending to our institution.

Unusually high incidence of multifocal epithelial hyperplasia in children of the Nahuatl population of Mexico.

Background: Multifocal epithelial hyperplasia is an uncommon disease of the oral mucosa caused by the human papilloma virus.

Aim: To study the clinical and pathological findings of multifocal epithelial hyperplasia detected during an oral examination of 343 Mexican Nahuatl children from a single primary school in El Paso de Cupilco, Mexico.

Methods: A thorough oral examination was performed in all children and clinical data (age, gender, location and number of lesions) were documented and analyzed.

Study on frequency of dental developmental alterations in a Mexican school-based population.

Background: The aim of this study was to know the distribution of dental developmental alterations in the population requesting stomatological attention at the Admission and Diagnosis Clinic of our institution in Mexico City.

Material And Methods: We reviewed the archives and selected those files with developmental dental alterations. Analyzed data were diagnoses, age, gender, location and number of involved teeth.

MUC-1 expression in pleomorphic adenomas using two human milk fat globule protein membrane antibodies (HMFG-1 and HMFG-2).

Unlabelled: Pleomorphic adenoma (PA) is the most common salivary gland tumor and its microscopic features and histogenesis are a matter of debate. Human milk fat globule protein membrane (HMFG) monoclonal antibodies (MoAbs) comprise a set of antibodies against the mucin 1 (MUC-1) protein detected in several salivary gland tumors.

Objective: The aim of this study was to assess the immunoexpression of the PA neoplastic cells to MUC-1 protein using HMFG-1 and HMFG-2 MoAbs, contrasting these results with those from normal salivary gland tissue.

Scanning Electron Microscopic Study on the Fibrillar Structures within Dentinal Tubules of Human Dentin.

Introduction: Pulp biology is central to the whole tooth, and knowledge on its microstructure is changing with new studies. This study presents certain microfibrillar structures found within the dentin tubules of human teeth connecting dentin tubules and odontoblastic processes.

Methods: We analyzed the crowns of 30 noncarious, human teeth.

Toxicity test of a dental commercial composite.

Background: International rules must be followed for testing biosecurity in dental materials. A new brand of restorative material appeared in the market and regulations indicated that it should be tested for toxicity.

Objectives: The aim of this study was to determine the 90-day sub chronic toxicity of one triethylene glycol dimethacrylate containing composite (MEDENTAL Light-Cure Composite™) orally administered to rats according to Organization for Economic Co-Operation and Development no.

Review of the literature on necrotizing sialometaplasia and case presentation.

The aim of this article is to report a case of necrotizing sialometaplasia with long-term follow-up. A case of necrotizing sialometaplasia in a 37-year-old man with clinical documentation on the progress during a 2-year follow-up is presented. Data from an extensive review of the literature including clinical, imagenologic, and microscopic features are provided.

Presence of matrix vesicles in the body of odontoblasts and in the inner third of dentinal tissue: a scanning electron microscopic study.

Objectives: The aim of this report is to present the results of a scanning electron microscopic study on the presence of matrix vesicles (MVs) found in human dentine.

Study Design: Dentin tissue from 20 human bicuspids was analyzed by means of scanning electron microscopy.

Results: MVs were found as outgrowths of the cellular membrane of the odontoblastic body, the more proximal portion of the odontoblastic process before entering the dentinal tubule and in the odontoblastic process within the inner third of the dentin.

Pathological findings in a sample of Mexican pediatric patients. Clinical and radiographic survey.

Aim: The findings of a clinical-radiological review of 467 children attending the Oral Diagnosis Clinic of the Facultad de Odontología, UNAM, Mexico, are presented.

Methods: All patients were clinically reviewed, clinical history was taken, and an orthopantomogram obtained by last year dentistry students. Patients and radiographs were then reviewed by the panel and all alterations in teeth, soft tissues and bone were recorded.

P53 and bcl-2 immunoexpression in patients with oral lichen planus and oral squamous cell carcinoma.

Objective: The aim of this study was to determine by immunohistochemistry the presence and significance of p53 and bcl-2 proteins in oral lichen planus (OLP) and oral squamous cell carcinoma (OSCC).

Study Design: We used 21 cases diagnosed as OLP 16 diagnosed as OSCC and four normal gingival biopsies taken from healthy patients were used as controls. Slides were processed for immunohistochemistry using anti-p53 and anti-bcl-2 monoclonal antibodies.

Central odontogenic fibroma: new findings and report of a multicentric collaborative study.

Objective: The aim of this study was to describe the clinicopathologic and immunohistochemical characteristics of 14 cases of central odontogenic fibroma (COF), and the ultrastructural features of 2 of them.

Study Design: Collaborative retrospective study based on the records of 4 oral pathology diagnostic services in Latin America based on the current World Health Organization classification.

Results: There were 7 male and 7 female patients (mean age 31.

Fluoride content in table salt distributed in Mexico City, Mexico.

Objective: The aim of this study was to analyze table salt available in Mexico City's market to identify the fluoride concentrations and to compare these with the Mexican regulations.

Methods: We analyzed 44 different brands of table salt. All samples were purchased at random in different stores, supermarkets, and groceries from Mexico City's metropolitan area and analyzed in triplicate in three different laboratories (nine determinations per sample) with an Orion 720 A potentiometer and an Orion 9609 BN ion-specific electrode.

MUC-1 mucin in normal human salivary glands detected by HMFG-1 and HMFG-2 monoclonal antibodies.

The aim of this study was to determine the immunoexpression of normal salivary gland cells using two human milk fat globule membrane protein antibodies (HMFG-1 and HMFG-2). Paraffin-embedded, 5 microm-thick slides from parotid and submandibular gland tissues were cut and immunostained with monoclonal antibodies HMFG-1 and HMFG-2 against MUC1 protein. HMFG antigens were found in secretory epithelial cells and ductal cells lining the striated and intercalated ducts in the intraductal secretion material, and sometimes in the myoepithelial cells.

International collaborative study on ghost cell odontogenic tumours: calcifying cystic odontogenic tumour, dentinogenic ghost cell tumour and ghost cell odontogenic carcinoma.

Background: Calcifying odontogenic cyst was described first by Gorlin et al. in 1962; since then several hundreds of cases had been reported. In 1981, Praetorius et al.

Scanning electron micrographic features of a giant submandibular sialolith.

To recognize recently appearing mineralization phenomena, one must study the external surface of the sialoliths, since it is not possible to study them in the central portions of sialoliths. The authors examined the external surface of a sialolith by scanning electron microscopy and analyzed its microstructures. The study revealed the presence of numerous microstructures of different shapes (nodular, laminar, reticular, microgranular, and multinodular) and variable size arranged in a haphazard fashion.

Clinicopathological and immunocytochemical study of multifocal epithelial hyperplasia.

Purpose: We present the clinicopathological findings after reviewing 52 patients affected by multifocal epithelial hyperplasia (MEH), previously known as focal epithelial hyperplasia and the results of an immunocytochemical study.

Patients And Methods: We reviewed the clinical files and microscopic slides from 52 MEH-affected patients and new slides were immunostained with a polyclonal antibody against high molecular weight cytokeratins.

Results: More than 95% of the patients were in poverty (<200 dollars monthly family income).

Ameloblastomas: a regional Latin-American multicentric study.

Aim: To classify 163 ameloblastoma cases according to the new WHO Classification of Odontogenic Tumours (2005) and analyse their clinical and microscopic features.

Methods: We studied the clinico-pathological features of 163 ameloblastoma cases from nine regional Latin-American institutions from Mexico and Guatemala.

Results: Ameloblastomas comprised 22.

Myoepithelial cells are the main component in pleomorphic adenomas?

Objective: The aim of this study was to quantify by immunohistochemistry the number of myoepithelial cells (MyECs) in pleomorphic adenomas (PAs).

Material And Methods: We retrieved the paraffin cubes of 27 PAs, new slides were done and they were stained with anti-S100 protein antibody. The amount of S-100 protein positive cells was quantified, their morphology was recorded and comparison among MyEC number with age, gender and involved gland were also done.