Abstract All dual‐arch impression techniques utilize special stock impression trays of various designs. These trays are made of flexible plastic with fabric or mesh material placed across the occlusal surfaces of the teeth connecting their buccal and lingual flanges. The presence of this material will result in errors by (1) not allowing complete intercuspation during impression‐taking; (2) producing incorrect recording of centric occlusion; and (3) because of the elastic memory of the tray/fabric, creating distortion of the elastic impression material. An impression technique is presented which provides a simple and effective method of obtaining dual‐arch impressions for single restorations, post and cores, and small bridges. This technique obivates the need for impression trays thus eliminating the errors outlined.
Abstract A technique using a glass‐cermet cement for preendodontic coronal build‐up of badly broken‐down teeth is described. This glass‐cermet cement fulfils the more specific requirements of a material used in coronal build‐ups of a less permanent nature without damage to existing tooth structure and satisfies the requirements of endodontic procedures. The technique allows for endodontic therapy to be commenced immediately and facilitates canal instrumentation.
This article addresses the difficult clinical problem of restoration of endodontically treated posterior teeth, where there is nothing left of the clinical crown.A step by step procedure, including instrumentation and materials and a new impression technique, is described in detail, with clinical photographs.This technique results in the fabrication of a robust and extremely retentive post and core on which to place fixed prosthodontic restorations.The author has placed over 600 restorations of this type over a five year period, without any reported failures. With the 'greying' of the population there are increased demands on dentists to restore structurally compromised teeth, and increasing expectations of the performance of these restorations. This technique is offered as a superior alternative to conventional post and core constructions methods.
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