Dentistry Commons^™

Structural Conformation And Leaching From In Vitro Aged And Retrieved Invisalign Appliances, Susan Schuster, George Eliades, Spiros Zinelis, Theodore Eliades, T. Gerard Bradley

School of Dentistry Faculty Research and Publications

The objectives of this study were to investigate the structure of Invisalign appliances (Align Technology, Santa Clara, Calif) after intraoral exposure, and to qualitatively and quantitatively characterize the substances leached from the aligners after accelerated in vitro aging. Samples of Invisalign appliances were randomly selected from 10 patients before intraoral placement and after retrieval, and the prepared specimens were subjected to (1) bright-field optical reflection microscopy to study the surface morphology; (2) Fourier transform infrared microspectroscopy to characterize the in vivo changes in molecular composition induced on appliance surfaces, (3) scanning electron microscopy and energy dispersive X-ray microanalysis to identify …

Post-Irradiation Leiomyosarcoma Of The Maxilla: Report Of A Case In A Patient With Prior Radiation Treatment For Retinoblastoma, Parish P. Sedghizadeh, Francesca Angiero, Carl M. Allen, John R. Kalmar, Yeshwant B. Rawal, Eric A. Albright

School of Dentistry Faculty Research and Publications

Post-irradiation sarcoma is a well-defined complication of radiation therapy, yet few reports document such lesions in the head and neck. A 30-year-old man presented for evaluation of an expansile lesion of the left posterior maxilla. His medical history was significant for a childhood ocular malignancy - unilateral retinoblastoma - which was treated with a combination of surgical enucleation of the eye and external beam radiation therapy. Biopsy of his maxillary lesion revealed a spindle cell malignancy that was morphologically and immunohistochemically consistent with a diagnosis of leiomyosarcoma. Further investigation into the case revealed that the patient had three children, every …

Exposure To The Dental Environment And Prevalence Of Respiratory Illness In Dental Student Populations, Frank A. Scannapieco, Alex W. Ho, Maris Ditolla, Casey Chen, Andrew R. Dentino

School of Dentistry Faculty Research and Publications

Objective: To determine if the prevalence of respiratory disease among dental students and dental residents varies with their exposure to the clinical dental environment.

Methods: A detailed questionnaire was administered to 817 students at 3 dental schools. The questionnaire sought information concerning demographic characteristics, school year, exposure to the dental environment and dental procedures, and history of respiratory disease. The data obtained were subjected to bivariate and multiple logistic regression analysis.

Results: Respondents reported experiencing the following respiratory conditions during the previous year: asthma (26 cases), bronchitis (11 cases), chronic lung disease (6 cases), pneumonia (5 cases) …

The Paradigm Of The Relationship Among Occlusion, Orthodontics And Temporomandibular Disorders, Jose A. Bosio

School of Dentistry Faculty Research and Publications

The relationship between occlusion, Orthodontics and temporomandibular disorders have been subject of discussions and controversies. In the past, the scientific literature stated that the temporomandibular disorders occurred due to the malocclusion, and, for its correction, an orthodontic treatment should be performed. Apparently, those theories have become obsoletes, and according to more consistent scientific articles, the relationship among these entities have been questioned. This literature review shows a possible change in the paradigm of the relationship among the three entities.

Morphology Of Root Canal Cross-Sections Of Resected Roots Of First And Second Lower Molars, Mariusz Duda, Agata Skoczek, Bartlomiej Kowal, Agnieszka Domagala

School of Dentistry Faculty Research and Publications

Precise preparation of the root canal ostium with a view to hermetical closing with retrograde root filling is an important prognostic factor determining the success of the procedure of tooth resection. Root canals interconnected with a narrow isthmus may cause problems both in endodontic treatment and in retrograde filling. The aim of this work is the research of the transverse cross-section of root canals of first and second lower molars on the resection model. The research encompasses 100 randomly selected molar teeth: 50 first and 50 second lower molars. The tooth root apexes were cut 3 mm below the apex …