Pycnodysostosis (PYCD) is a rare autosomal recessive skeletal dysplasia arising from a change in the production of the cathepsin K enzyme and it is also known as Maroteaux-Lamy Syndrome. The main changes in the buccal and maxillofacial region are modifications of the facial bones (leading to the loss of the mandibular angle due to micrognathia), deep palate, premature and/or delayed tooth eruption, hypopneumatization of the maxillary sinuses, chin hypoplasia, hypercementosis, enamel hypoplasia, hyperdontia, incomplete dentin calcification, root hypoplasia, pulp chamber obliteration, and increased free functional space. This paper aims to report a case of a patient with PYCD, in which are highlighted the oral manifestations of this syndrome and present an option of oral rehabilitative treatment through a removable overdenture made on natural tooth of the patient. The technique of dental coating through overdenture is a simple, viable and conservative alternative for oral rehabilitation of patients with large maxillomandibular discrepancies, as in cases of pycnodysostosis, especially in the presence of increased free spacecharacteristic of patients with this syndrome. The result was quite satisfactory both aesthetically and functionally and provided a better life quality for the patient.
The study of the micromachining process of titanium alloys has been intensified due to a greater need to develop microcomponents applied to the medical area. However, the investigation of the behavior of process variables is still incipient, complex and challenging. Heat and temperature distribution, for example, are important aspects for any machining process. Thus, the main objective of this work is to investigate the temperature during the micro-milling of the Ti-6Al-4V alloy, by means of an experimental study combined with numerical simulation. To carry out the tests, AlCrN coated carbide end mill tool was used for machining micro slots. During machining, the workpiece temperature is measured using T-type thermocouples welded to the workpiece surface, aligned with the tool path. The temperature distribution was also obtained by numerical simulation using the commercial software Third Wave AdvantEdge, version 7.4015. The experimental results showed that the temperature on the surface of the specimen increases from the up-milling side to the down milling side. In addition, the temperature has a tendency to increase with tool wear. However, the simulation data showed that the temperature is higher in the center of the channel, the position with the highest undeformed chip thickness.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.