Screw-retained full arch restorations – methodology of computer aided design and manufacturing
Journal Title: Archives of Materials Science and Engineering - Year 2017, Vol 1, Issue 83
Abstract
Purpose: The aim of the paper is to present the designing and manufacturing process ofthe screw-retained superstructure of the dental arch in the maxilla based on six implants usingCAD/CAM technology.Design/methodology/approach: The methodology is presented on the example of theimplantoprosthetic treatment in a 55-year-old female patient with a significant deficit of the alveolarbone. 6 implants were placed to achieve a good anchorage for the ceramic suprastructure. Theprosthetic reconstruction was milled out of a zirconium dioxide block and covered with veneeringceramics to obtain good aesthetics of the restoration. Special copings were designed andmanufactured to achieve stabile connection between the implants and the suprastructure.Findings: To properly plan the prosthetic work rebuilding the alveolar ridge on dental implantsit is necessary to plan the final prosthetic work before implant placement planning the numberof implants and their location in the bones and the possibility of using a fixed or a mobilesuprastructure.Practical implications: Design of the suprastructure has to take into account the followingfactors: 1. The number of implants, copings and openings for the abutment screws, 2.Arrangement of teeth in the prosthesis, 3. The shape of the alveolar ridge, 4. The shape of thespace for the porcelain and for the individual crowns, which will be pasted on the suprastructure.Originality/value: For technological reasons it is not possible to make an extensivesuprastructure in a single piece. It is necessary to execute the foundation of the reconstructionof the alveolar ridge and the teeth in one piece and separately the individual crowns. Itis possible, however, to design and manufacture the complex screw-retained prostheticsuprastructures by means of CAD/CAM technology.<br/><br/>
Authors and Affiliations
P. Malara, L. B. Dobrzański
Keywords
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