Measurement and Analysis of Color Characteristics of Tetracycline Teeth in Kunming Area of Yunnan Province

Yu MAO; Wenhong ZHAO; Chunyan YI; Tingshan WANG; Tao ZHANG; Xianghong YANG

doi:10.12259/j.issn.2095-610X.S20240812

Volume 45 Issue 8

Aug. 2024

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Article Navigation > Journal of Kunming Medical University > 2024 > 45(8): 79-85

Yu MAO, Wenhong ZHAO, Chunyan YI, Tingshan WANG, Tao ZHANG, Xianghong YANG. Measurement and Analysis of Color Characteristics of Tetracycline Teeth in Kunming Area of Yunnan Province[J]. Journal of Kunming Medical University, 2024, 45(8): 79-85. doi: 10.12259/j.issn.2095-610X.S20240812

Citation:

Yu MAO, Wenhong ZHAO, Chunyan YI, Tingshan WANG, Tao ZHANG, Xianghong YANG. Measurement and Analysis of Color Characteristics of Tetracycline Teeth in Kunming Area of Yunnan Province[J]. Journal of Kunming Medical University, 2024, 45(8): 79-85. doi: 10.12259/j.issn.2095-610X.S20240812

Citation:

Yu MAO, Wenhong ZHAO, Chunyan YI, Tingshan WANG, Tao ZHANG, Xianghong YANG. Measurement and Analysis of Color Characteristics of Tetracycline Teeth in Kunming Area of Yunnan Province[J]. Journal of Kunming Medical University, 2024, 45(8): 79-85. doi: 10.12259/j.issn.2095-610X.S20240812

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Measurement and Analysis of Color Characteristics of Tetracycline Teeth in Kunming Area of Yunnan Province

doi: 10.12259/j.issn.2095-610X.S20240812

Dept. of Prosthodontics，Yan’an Hospital Affiliated of Kunming Medical University，Kunming Yunnan 650051，China

Received Date: 2024-01-18
Available Online: 2024-07-18
Publish Date: 2024-08-05

Abstract

Abstract

Objective To collect color data of tetracycline staining in upper anterior teeth in Kunming, Yunnan area, study their color characteristics and distribution patterns. Methods A total of 100 tetracycline dental patients with an average age of 48 were randomly selected from Yan’ an Hospital in Kunming City from January 2023 to December 2023. The VITA Easyshade Advance 4.0 wireless spectrophotometer was used for color comparison. The L*a*b* values of the upper central incisors, lateral incisors, and canines were measured at the cervical 1/3, middle 1/3, and incisal 1/3 positions of each tooth. The teeth were grouped by gender, age, location, and degree of discoloration for statistical analysis. Results The overall distribution of the middle 1/3 L*a*b* values of the anterior teeth with different staining degrees of tetracycline is as follows: mild degree: L*: 64.1～75.7, a*:1.4～5.1, b*:12.5～24.2; medium degree: L*: 51.8～70, a*: 1.5～8, b*: 13.8～34.3; severe degree: L*:44.9～65, a*:3.3～11.6, b*:11.4～29.5. There was no significant difference in the chromaticity value of the anterior teeth of tetracycline in different genders（P > 0.05）. The L* value of tetracycline in anterior teeth at different ages was significantly different（P < 0.05）.The difference of a*b* values in different parts was statistically significant （P < 0.05）. The difference of L*a* values in different coloring degree was statistically significant （P < 0.05）. Conclusion The color changes of tetracycline-stained anterior teeth in the Kunming area of Yunnan are not related to gender, but rather to age, location, and degree of staining; compared to normal teeth, the color range of tetracycline-stained teeth is more diverse, with an overall hue leaning towards red, yellow, and gray. The brightness of severely tetracycline-stained teeth is generally darker, suggesting that when clinically performing aesthetic restoration or making shade guides for tetracycline-stained teeth, shade tabs with slightly lower brightness and hues leaning towards red, yellow, and gray can be used as references.
- Tetracycline teeth,
- Colorimetry,
- L*a*b* value,
- Coloring degree

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