Dentist Anthony Mak shows his controlled layer concept in this video with G-ænial A’CHORD composite from GC and the M5 XP composite instrument kit from American Eagle. To restore a large Class IV restoration following this composite restoration concept he uses a silicon mould from a wax-up and preheated G-ænial A’CHORD composite. G-ænial A’CHORD has an ideal non-sticky consistency and can be sculpted easily with hand instruments as well as brushes. The palatal shelf is made first, followed by the interproximal wall. Thereafter, the dentin portion or the ‘body transition layer’ is sculpted on top of the shelf, with attention given to the creation of the mamelons. Next up is the polishing and texture creating, which is done with silicone points and fine diamond burs under water cooling. A nice hack shown here is the use of the pencil to mark the desired surface’s macrostructure. It’s a way to keep control of which sites need more polishing than others. The vertical macrostructure in the upper incisors exists of two V-shaped grooves, which are de depressions between the three developmental lobes. The distal one is usually somewhat longer than the mesial. Next to that, there is also a horizontal microstructure present. These are thin horizontal lines, called perikymata, which are extremely thin and lie very close to each other.
When polishers with different stages of roughness are used, it is necessary to go through the entire polishing system, starting at the most abrasive rubber and finishing at the less abrasive rubber. After creation of the micro-texture, the surface of the resin composite should be slightly smoothened with low abrasive rubbers. After final finishing with a cotton buffing wheel, we can enjoy an amazing result!
30 сен 2024
