Influence of the CAD-CAM Systems on the Marginal Accuracy and Mechanical Properties of Dental Restorations.

The aim of this study was to compare the quality of different computer-assisted-design and computer assisted manufacturing systems (CAD-CAM) generated by only one scanner, focusing on vertical fit discrepancies and the mechanical properties. A master model was obtained from a real clinical situation: the replacement of an absent (pontic) tooth, with the construction of a fixed partial denture on natural abutments with three elements. Nine scans were performed by each tested and 36 copies were designed using a dental CAD-CAM software (Exocad).

Accuracy of Implant Casts Generated with Conventional and Digital Impressions-An In Vitro Study.

Purpose: The aim of this study was to compare the accuracy of digital dental impressions with the accuracy of impressions obtained via conventional techniques.

Methods: Two different master models were created, one with parallel implants (model 1) and the other with non-parallel implants (model 2). These reference master models included 4 Klockner KL RP implants (Klockner Implant System SA, Barcelona, Spain), which were juxta-placed and equidistant in the intermentoneal region.

Efficacy of PdB in preventing intraoperative risk of infectious diseases.

The objectives of this study were to (1) determine the number of punctures surgeons and assistants suffer during operations involving a laparotomy during the intraabdominal and closure phases; and (2) determine if the number of puncture injuries during wound closure can be reduced using a new surgical instrument (PdB) that protects the surgeon's hands and the patient's viscera against needlesticks. For the first objective, all laparotomies performed during 1 month (n = 52) were controlled, collecting the gloves used and determining the number of perforations. For the second objective, a randomized prospective controlled study, involving two series of 100 medial laparotomies, was carried out.

Pseudo-analbuminaemia due to the presence of a slow albumin variant moving into the alpha 1 zone.

A serum has been studied, in which direct observation of cellulose acetate electrophoresis may induce misdiagnosis of analbuminaemia. Immunogically, and by saline fractionation, the serum contained albumin, although in a decreased quantity. Gel filtration shows the majority of this albumin is to be in the 4.