What is a zirconia all-ceramic dental crown?
2024-09-19
2024-10-29
1. A good communication should be established between the physician and the technician.
2. The environment in the clinic should simulate white natural light or daylight conditions; it is preferable to have a gray tone for the surrounding environment, avoiding reflective or brightly colored objects.
3. Remove distractions, such as lipstick, shiny earrings, scarves, glasses, etc.
4. Shade matching should be conducted under natural light, with the best time being between 10 a.m. and 3 p.m.
5. When performing shade matching, clean the natural teeth, remove tobacco stains and tea stains from adjacent teeth, and if necessary, polish with a rubber cup.
6. The timing of the colour comparison is appropriate. At the beginning of the consultation, the colour comparison time should be short, the best first 5 seconds to make a choice, and believe that the first choice, because the eye for colour in 5 to 7 seconds will occur fatigue.
7. For teeth with complete or partially complete surfaces, the colour comparison should be carried out before preparation.
8. The practitioner may look at the blue background before the colour comparison.
9. The doctor should be at the same level as the surface of the tooth during colourimetry, and the colourist should be located between the patient and the light source.
10. It is better to moisten the colour contrast plate slightly and then carry out the colour comparison.
11. According to the neighboring teeth, the opposite side of the same name teeth and the opposite jaw teeth and teeth that need to be restored before tooth preparation, analysis, according to the surface colour characteristics of the colour comparison, and the patient's age, gender into account, to help the patient to get the most coordinated and appropriate restoration of the colour.
12. The choice of environmental light should not be too strong, can be half closed eyes.
13. Pointed teeth with high saturation, you can choose the pointed teeth as the tone of reference teeth
14. It is difficult to choose a similar tooth colour, choose the closest low saturation, high brightness of the tooth colour, you can use the method of colour to make up.15. Can use the exclusion method for colour comparison, gradually discharged with the tooth colour does not match the colour card (not recommended).
16. For the teeth cutting edge, the impact of transparency of the adjacent surfaces also need to be taken into account, the use of different transparency of the colour card for colorimetric.
17. As far as possible, partitioned colour, divided into 9 divisions, rather than 3 divisions.
18. Colorimetric at the same time, it is best to carry out the same period of natural tooth photography as an auxiliary means of observation of tooth colour morphology and surface characteristics, etc.
