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The Study by Restoration Color Matching with Four Methods

Author: MaDan
Tutor: ChenXiaoDong
School: Dalian Medical University
Course: Clinical Stomatology
Keywords: Shade Computer Colorimeter Technician Digital cameras
CLC: R783
Type: Master's thesis
Year: 2010
Downloads: 61
Quote: 0
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Abstract

Objective: By comparing four different colorimetric method for the production of porcelain repair the body and the patient's natural tooth color differences, to evaluate the feasibility and rationality for dental colorimetric, to elect a more accurate and convenient than color. Methods: The treatment of 14 cases in Dalian Stomatology Hospital the unilateral maxillary central incisor defects requiring repair in patients with a nickel-chromium alloy porcelain crown is an experimental study, require anterior teeth defect over two unilateral maxillary incisor defects, vital pulp teeth crown of the same name, developed normally, caries, fillings and restorations, color uniform, no abnormal tooth-colored surface without tartar and plaque. Teeth arranged in neat rows, no dislocation reverse the normal color of gums, no history of orthodontic treatment and bleaching history. Treated before colorimetric measurement dental ultrasonic scaling to remove debris. Select the color under natural light than in sunny weather from 10:00 am to 2:00 pm by the window. Physicians and patients do not wear the clothes of special high-brightness, no lipstick, and the gray towel treatment for patients with chest coverage. (1). Clinicians Colorimetry: visual dysfunction by three color vision and strong repair general practitioners operating more extensive knowledge of color science. According to the brightness, saturation, hue order Vita 3D-Master shade guide for color selection. (2) technicians involved in color: the production of denture technician invited to the clinic, in accordance with the above method with physicians color selection. (3) instrument colorimetry: In this experiment, Vita Company production the spectrophotometer Vita Easyshade measurement crown 1/3 of the L *, a *, b * values, each tooth measured three times and the three measurement results average. (4). Pass digital camera colorimetric information: Vita 3D-Master digital photos than the swatch with the teeth to be measured in patients with spread to the technician's computer, as a reference, making dentures. Tooth preparation in accordance with the method of the conventional production of porcelain restorations, invitation with an experienced technician with the above four methods were produced for each patient porcelain restorations. Try them with a double-blind method survey patient satisfaction. And then the four methods with Vita EasyShade measuring prosthesis produced 1/3 of the L *, a *, b * values. Them with natural teeth color difference value formula SPSS11.5 statistical software to its one-way ANOVA analysis results: average color difference between the natural teeth with four colorimetric method produced porcelain crown: clinicians colorimetric 5.68 and technicians involved in colorimetry 4.59, digital camera method 3.39 instrument colorimetry 5.96. Transfer color information from the digital camera colorimetry and natural tooth color difference value of the minimum, the maximum value of the instrument colorimetry and natural tooth color difference. Digital camera group and technicians involved in the group of the existence of significant differences, technicians to participate in the group with the physician colorimetric group there are significant differences, and the physician than color group with the instrument than the color group there is no significant difference. Digital photo group patient satisfaction rate of 85.71%, technicians to participate in the group was 71.43%, physicians colorimetric group was 64.29%, instrument colorimetric group was 57.14%. Conclusion: The digital camera pass color information colorimetric method was significantly better than the other three groups. The colorimetric method is superior to simple clinicians technicians involved in the visual colorimetry. The pure clinicians visual colorimetric method and computer colorimeter colorimetry was no significant difference.

The Study by Restoration Color Matching with Four Methods

Abstract

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