Effect of Sintering Temperature on the Color of 3D Monolithic Zirconia

1Experimental Sample, Equipment, Parameter

Sample：Bloomden Products 3D-pro-ml-A1, 3D-pro-ml-A2, 3D-pro-ml-A3

Equipment：Bloomden Sintering Furnace Model#：B1700

Experiment comparison of sintering system:

1. Bloomden 3D series products recommended sintering temperature curve

2. 1530℃sintering temperature curve

2.Experiment result and conclusion

Comparison picture ：Sample pictures after sintering (left 1530℃, right 1480℃)

3D-pro-ml-A3

3D-pro-ml-A2

3D-pro-ml-A1

Conclusion: As experiment result, 1480℃ is more recommend sintering temperature than 1530℃.At the sintering temperature of 1530℃, all color of 3D-pro-ml-A1、3D-pro-ml-A2 and 3D-pro-ml-A3 are lighter than 1480℃.After sintered at 1530℃, the color of 3D-pro-ml-A3 tooth is more like A2 and 3D-pro-ml-A1 and 3D-pro-ml-A2 is lighter than A1 on color sheet.

3.Analysis and Suggestion

Analysis：Manufacturer 3d Multilayer Pro Dental Zirconia Block As result of the material of 3D series products is a multi-powder mixture and it`s contain many high permeability UT powder. Considering the suggested sintering temperature range of UT powder is 1430℃——1480℃, which is much lower than 1530℃.Therefore, when sintered products at 1530℃ will cause abnormal growth of zirconia crystals in the product and affect the color of the product.

Suggestion: We recommend 3D products are sintered at temperature of 1480℃, and the temperature range should not exceed 1450℃ – 1500℃.