Shoulder preparation on tooth 21: placing of an ultra thin thread, interdental separation with separation instrument FG D3, 1mm wide circular internally rounded shoulder preparation with shoulder instrument FG 305L. The preparation set includes a narrow shoulder preparation instrument FG 307A for narrow tooth abutments and tight spaces
Palatal concavity with front-side rounded football instrument FG 250
Finishing of the shoulder and axial walls: the stump is smoothed with the newly developed – analogous to the dimensions of the preparation instrument – cylindrical finishing instrument FG 4307N (wide) or FG 4305L (narrow)
Partial crown, overlay (tabletop) preparation
Defect-oriented overlay (tabletop) preparation on a patient with dentition damaged by erosion and abrasion, rough preparation with preparation instrument FG 8526, occlusal preparation with football instrument FG 250
Finishing with appropriate finishing burs FG 4526 and FG 4250, posterior breaking of all sharp edges with Soflex discs clamped into the mandrel
Adhesive bridge preparation
Definition of a mesial and distal groove in the enamel in the desired direction of insertion, slightly palatal to the future contact point, with separation instrument FG D3
Expansion of groove in the enamel with conical veneer preparation instrument FG D18 GB, thereby fulfilling currently valid requirements for full ceramic and CAD/CAM production (apically rounded, 6° conicity, clear groove definition)
Preparation of a cingulum support in the enamel with ball instrument FG 201
Diamond instruments for inlays, partial and full crowns, bridges and fixed restorations
The spectrum of reconstructive dentistry is today more versatile than ever, as both requirements for minimal invasiveness as well as high aesthetics and stability of the reconstruction must be fulfilled.
Preparation with veneers, overlays (tabletops) and adhesive bridges, which aim at minimal tooth substance removal and are merely defectoriented, are often used today where formerly conventional crowns and bridges were used. Through the adhesion to the tooth substance, modified requirements are now placed on the preparation. In addition, a great variety of dental materials and manufacturing techniques are used at present.
Full ceramic and metal-ceramic restorations can be used equally for almost all indications. Numerous stable ceramics have been developed in recent years, whose dental processing has been facilitated by new CAD/CAM technologies.
Methods for optical impression, and therefore to digitize tooth stumps, are increasingly being used instead of classic impressions commonly applied in dental surgeries. All these computer-based technologies lead to the need for new approaches in the teeth preparation.
A modern instrument set for preparation must meet all these requirements, be universally applicable and still be clear and well-structured.
With this well-structured, rational set of instruments, various preparations for minimally invasive reconstruction, conventional crowns and bridges, for full ceramic and metal-ceramic, can