Khosla Amrit, Maini Anuj Paul, Wangoo Anuj, Singh Sukhman, Mehar Damanpreet Kaur
Professor, Department of Prosthodontics, Bhojia Dental College , Baddi, Solan, Himachal Pradesh, India .
Professor and Head, Department of Oral Medicine and Radiology, Laxmi Bai Dental College , Patiala, Punjab, India .
J Clin Diagn Res. 2017 Jan;11(1):ZC33-ZC36. doi: 10.7860/JCDR/2017/23707.9178. Epub 2017 Jan 1.
The success of a restoration is dependent on accurate shade matching of teeth leading to studies evaluating the factors affecting the perception of shades. Colour vision anomalies including colour blindness have been found to exist in the population and it has been thought to be a potential factor affecting the colour perception ability.
The present study was done to evaluate the prevalence of colour vision anomalies and its effect on matching of shades of teeth.
A total of 147 dental professionals were randomly selected for the study and were first tested for visual acuity using the Snellen's Eye Chart so as to carry on the study with only those operators who had a vision of 6/6. Then, the Ishihara's colour charts were used to test the operators for colour vision handicap. In the last stage of the study, test for accuracy of shade selection was done using the Vitapan Classical shade guide. The shade guide tabs were covered to avoid bias. Percentage was used to calculate the prevalence of colour vision handicap and its effect on matching of shades of teeth as compared to normal vision, which was evaluated using Chi square test.
Nineteen operators had colour vision anomalies out of hundred operators and only two operators presented with colour blindness. Colour vision anomaly was more prevalent than colour blindness and it was also found that it was more prevalent in males than females. The difference between the accuracy of shade matching between the operators with normal vision and colour vision defect and operators with normal vision and colour blindness was statistically not significant.
Colour blindness and colour vision handicap are rare conditions, with the latter being more common in the population. According to our study, it was concluded that no statistically significant difference existed amongst the operators with normal vision and colour vision anomaly or operators with normal vision and colour blindness during the matching of shades of teeth.
修复体的成功取决于牙齿颜色的准确匹配，这促使了对影响颜色感知因素的研究。已发现人群中存在包括色盲在内的色觉异常，并且一直被认为是影响颜色感知能力的一个潜在因素。
本研究旨在评估色觉异常的患病率及其对牙齿颜色匹配的影响。
总共随机选择了147名牙科专业人员进行研究，首先使用斯内伦视力表测试视力，以便仅对视力为6/6的操作人员进行研究。然后，使用石原氏色盲检查表测试操作人员是否存在色觉障碍。在研究的最后阶段，使用维他经典比色板进行颜色选择准确性测试。比色板标签被遮盖以避免偏差。使用百分比计算色觉障碍的患病率及其与正常视力相比对牙齿颜色匹配的影响，使用卡方检验进行评估。
在100名操作人员中，有19名存在色觉异常，仅有2名表现为色盲。色觉异常比色盲更普遍，并且还发现男性比女性更普遍。正常视力与色觉缺陷的操作人员以及正常视力与色盲的操作人员之间在颜色匹配准确性上的差异在统计学上不显著。
色盲和色觉障碍是罕见情况，后者在人群中更常见。根据我们的研究，得出的结论是，在牙齿颜色匹配过程中，正常视力与色觉异常的操作人员或正常视力与色盲的操作人员之间不存在统计学上的显著差异。
