title: [Clinical application and evaluation of the custom shade guide of tetracycline stained teeth].
abstract: OBJECTIVE
  To evaluate the clinical application of the custom shade guide of tetracycline stained teeth in color matching.
  
  
  METHODS
  Forty-two patients with 59 tetracycline stained teeth were included in this study. Color matching was performed with Shofu shade guide and custom shade guide of tetracycline stained teeth. According to the two results, two porcelain fused to metal crowns were fabricated for each tooth. Evaluations were made both visually by dentists and patients and with ShadeEye NCC.
  
  
  RESULTS
  Color difference between prostheses made according to custom shade guide and natural teeth was (7.80 +/- 4.70). Color difference between prostheses made according to Shofu shade guide and natural teeth was (10.68 +/- 4.70). Both visual evaluation and ShadeEye NCC evaluation showed that the custom shade guide provided a more accurate shade selection than the Shofu shade guide did, and the difference between the two shade guides was significant (t = 7.328, P < 0.001).
  
  
  CONCLUSIONS
  The custom shade guide of tetracycline stained teeth provided a standard for clinical shade matching for the tetracycline stained teeth and could be a supplement to Shofu shade guide.
authors.affiliation: Department of Prosthodontics, Capital Medical University School of Stomatology, Beijing 100050, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Deng
authors.forename: Su
authors.initials: S
authors.lastname: Chen
authors.forename: Huai-yuan
authors.initials: HY
authors.lastname: Chen
authors.forename: Zhen-ting
authors.initials: ZT
authors.lastname: Zhang
mesh_terms: D000900:Anti-Bacterial Agents / Q000009:adverse effects*; D003116:Color; D003124:Colorimetry; D003776:Dental Porcelain; D006801:Humans; D010859:Pigmentation Disorders / Q000139:chemically induced*; D017797:Prosthesis Coloring / Q000379:methods*; D013752:Tetracycline / Q000009:adverse effects*; D014070:Tooth / Q000187:drug effects*
chemical_list: D000900:Anti-Bacterial Agents; D003776:Dental Porcelain; D013752:Tetracycline