Common problems encountered in dental laboratories
2024-09-12
When dental technicians fire zirconia blocks, they often encounter color abnormalities, such as darkening or lightening.
There are many reasons for this phenomenon, and the treatment methods are also different.
Causes and treatment methods for dark and light colors
One of the problems is that a certain color becomes darker or lighter, which is usually caused by staining liquid contamination or expired staining liquid.
The solution is simple: replace the staining liquid and avoid continuing to use the expired staining liquid.
Secondly, when all colors become darker or lighter, the reason may be inaccurate furnace temperature, improper immersion time or long-term use of staining liquid.
In this case, you first need to adjust the furnace temperature and compare and observe the changes. It is recommended that the temperature range for each adjustment is 15℃/grade.
At the same time, the length of immersion time will directly affect the color depth. The longer the immersion time, the darker the color.
The shorter the immersion time, the lighter the color, and the storage conditions of the staining liquid are also critical. Make sure that the staining liquid is stored under refrigerated conditions and return to room temperature before use.
Third, if the color is wrong occasionally, it is often due to contamination during the staining process or improper control of the immersion time.
To solve this problem, it is necessary to ensure that the surface of the restoration is clean during dyeing, prevent water or oil contaminants on tools and hands, and strictly control the immersion time.
In addition, the light color of the local tooth or the appearance of white spots is usually caused by contamination or oil or water during the dyeing process.
Therefore, keeping hands and tools clean and ensuring the surface of the restoration is clean are the key to solving this problem.
When dealing with the color of the incisal tip, dental technicians need to pay attention to the amount of special liquid applied.
Too much brushing will cause the incisal tip to be dark, while too little brushing will make the incisal tip white. Adjusting the amount of brushing according to the tooth shape can effectively improve this phenomenon.
Finally, the problem of the depth of the color of the missing part is usually caused by too much or too little application of the missing special liquid. The more the missing part is brushed, the lighter the color; conversely, the less brushing, the darker the color.
Therefore, dental technicians should reasonably adjust the amount of brushing according to the size of the missing part.
In the next section, vsmile will answer the reasons for color difference and how to solve it. Thank you for watching. vsmile is committed to creating a one-stop solution for dental aesthetics. If you need our help, please contact us in time. Thank you.
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