Regional odontodysplasia (RO) is a rare developmental anomaly involving both mesodermal and ectodermal dental components in a group of contiguous teeth. It affects the primary and permanent dentitions in the maxilla and mandible or both jaws. Generally it is localized in only one arch. The etiology of this dental anomaly is uncertain. Clinically, affected teeth have an abnormal morphology, are ...

he purpose of this study was to investigate the displacement of teeth occurring in dentures following storage in water at a temperature of 37oC. Ten maxillary dentures were constructed with Classico heat-cured acrylic resin using conventional metal flasks. Metallic reference pins were placed on the incisal border of the central incisors (I), buccal cusp of the first premolars (PM), and mesiobuc...

OBJECTIVE To evaluate the effect of staining beverages (coffee, orange juice, and red wine) on the Vickers hardness and surface roughness of the base (BL) and enamel (EL) layers of improved artificial teeth (Vivodent and Trilux). MATERIAL AND METHODS Specimens (n=8) were stored in distilled water at 37°C for 24 h and then submitted to the tests. Afterwards, specimens were immersed in one of t...

To achieve proper recontouring of anterior and posterior teeth, to obtain optimal morphology during enamel stripping, it is important to be aware of dental anatomy. This study aimed at evaluating crown dimensions and proximal enamel thickness in a sample of 40 extracted sound, human, mandibular, second bicuspids (20 right and 20 left). Mesiodistal, cervico-occlusal and buccolingual crown dimens...

difficulty in swallowing, problems with mastication and severe esthetic disfigurement. Improving esthetics and mastication are the reasonable objectives in these patients.2 The functional disabilities of mandible resections are primarily dependant on the amount resected, method of closure and amount of deviation of mandible. For successful prosthodontic rehabilitation of a segmental mandiblecto...

JCO/AUGUST 2002 T article presents a treatment method and fixed appliance designed to correct dental deep bite in patients of any age, or skeletal deep bite in growing patients. The appliance was developed by Dr. J.M.S. Pato in 1992 by attaching a Planas Equiplan1 to a Quad Helix* or a transpalatal bar (Fig. 1). The palatal expander is inserted into the lingual tubes of the first molar bands or...

T bite-block rapid maxillary expander, introduced by McNamara,1 is widely used in orthodontic practice for its ability to control molar ex trusion in hyperdivergent patients through muscletone activation. One disadvantage of a bonded expander is that acrylic coverage of the premolars and molars makes it difficult to monitor the progress of arch expansion. We have developed a technique for placi...

Early history of dentin bonding Attempts to develop an adhesive system which bonds acrylic resins to the tooth structure started in the early 1950s. In 1949, an adhesive system capable of bonding acrylic resin to the tooth structure was invented by Hagger; it was composed of glycerophosphoric acid dimethacrylate (GPDM) and sulfinic acid as the catalyst. In his patent, shear bond strengths of ac...

OBJECTIVE The aim of this study was to assess the level of patients' satisfaction with appearance of maxillary anterior teeth restorations and to determine if there is a significant difference in patients' assessment of restoration appearance with regard to gender. MATERIALS AND METHODS Two hundred subjects evaluated the colour, anatomical shape and surface texture of maxillary anterior teeth...

PURPOSE Acrylic resin teeth on fixed implant prostheses are subject to time-dependent wear. The purpose of this retrospective analysis is to evaluate and describe the management of such wear in the context of selected variables--patient gender and age, dental arch location, and opposing dentition. The clinical and dental laboratory process to replace the worn teeth is defined as a retread. MA...