1,720,967 research outputs found
A new protocol for the preparation of PRP: histological evaluation after sinus grafting with autologous and heterologous bone.
No full textComparative analysis of deformation of two implant/abutment connection systems during implant insertion. An in vitro study.
No full textEffetti di un trattamento ortopedico ortodontico in soggetto affetto da cheilognatopalatoschisi.
No full textUn nuovo protocollo per la preparazione del plasma arricchiti di piastrine (PRP): valutazione istologica dopo grande rialzo del seno mascellare con utilizzazione di osso autologo ed eterologo come materiale da innesto.
No full textAbutment individuali conici in titanio per sovrastrutture con cappette intermedie in oro elettrodeposto
No full text
Comparative analysis of direct and indirect implant impression techniques an in vitro study
No full textImplant impression and transfer of the implant position to a working cast for rehabilitative purposes not always represent a predictable reconstructive step. The variable results depend on the transfer technique utilized and on the accuracy of the impression materials. The aim of this study was to compare the accuracy of the direct and indirect impression techniques and to analyze the distortion of different impression materials. An edentulous acrylic resin mandible was used as reference model: in the cuspid position 2 laboratory analogs were inserted perpendicularly to the occlusal plane and fastened with resin. Two impressions for each indirect and direct recording techniques with 4 different impression materials were made. Polyvinyl siloxanes were used for the repositioning implant level method. Polyethers were used for the ''pick up'' impression technique. Analysis of cast distortion was measured computing the inter-implant position on the developed models compared to that of the master model. Measurements were recorded by a digital caliper. The results of this in vitro study demonstrate that the direct impression technique is preferable to the indirect one and that the Impregum polyether impression material is the most precise when used in association with a direct technique
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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