References
- Melrose C, Millett DT. Toward a perspective on orthodontic retention? Am J Orthod Dentofacial Orthop 1998;113:507-14.
- White LW. Retention strategies: a pilgrim’s progress. J Clin Orthod 1999;33:336-8.
- Heier EE, De Smit AA, Wijgaerts IA, Adriaens PA. Periodontal implications of bonded versus removable retainers. Am J Orthod Dentofacial Orthop 1997;112:607-16.
- Wang F. A new thermoplastic retainer. J Clin Orthod 1997;31:754-7.
- Lindauer SJ, Shoff RC. Comparison of Essix and Hawley retainers. J Clin Orthod 1998;32:95-7.
- Sheridan JJ, Gaylord RE, Hamula W, Hickham JH, Kokich VG, Tuverson DL. JCO Roundtable: finishing and retention. J Clin Orthod 1992;26:551-64.
- Gill DS, Naini FB, Jones A, Tredwin CJ. Part-time versus full-time retainer wear following fixed appliance therapy: a randomized prospective controlled trial. World J Orthod 2007;8:300-6.
- Jäderberg S, Feldmann I, Engström C. Removable thermoplastic appliances as orthodontic retainers--a prospective study of different wear regimens. Eur J Orthod 2012;34:475-9.
- Thickett E, Power S. A randomized clinical trial of thermoplastic retainer wear. Eur J Orthod 2010;32:1-5.
- Hichens L, Rowland H, Williams A, Hollinghurst S, Ewings P, Clark S et al. Cost-effectiveness and patient satisfaction: Hawley and vacuum-formed retainers. Eur J Orthod 2007;29:372-8.
- Gracco A, Mazzoli A, Favoni O, Conti C, Ferraris P, Tosi G et al. Short-term chemical and physical changes in Invisalign appliances. Aust Orthod J 2009;25:34-40.
- Gardner GD, Dunn WJ, Taloumis L. Wear comparison of thermoplastic materials used for orthodontic retainers. Am J Orthod Dentofacial Orthop 2003;124:294-7.
- Pascual AL, Beeman CS, Hicks EP, Bush HM, Mitchell RJ. The essential work of fracture of thermoplastic orthodontic retainer materials. Angle Orthod 2010;80:554-61.
- Eliades T, Eliades G, Watts DC. Structural conformation of in vitro and in vivo aged orthodontic elastomeric modules. Eur J Orthod 1999;21:649-58.
- Schuster S, Eliades G, Zinelis S, Eliades T, Bradley TG. Structural conformation and leaching from in vitro aged and retrieved Invisalign appliances. Am J Orthod Dentofacial Orthop 2004;126:725-8.
- International Commission on Illumination, ed. Colorimetry, Official Recommendations of the International Commission on Illumination. Publication CIE No. 15 (E-1.3.1). Paris: CIE, 1971.
- Hunter RS, Harold RW. The Measurement of Appearance. 2nd edn. New York: John Wiley & Sons, 1987.
- Paul S, Peter A, Pietrobon N, Hämmerle CH. Visual and spectrophotometric shade analysis of human teeth. J Dent Res 2002;81:578-82.
- Munsell AH. A colour notation. Baltimore: Munsell Colour, 1961.
- Seghi RR, Johnston WM, O’Brien WJ. Spectrophotometric analysis of colour differences between porcelain systems. J Prosthet Dent 1986;56:35-40.
- Kuehni RG, Marcus RT. An experiment in visual scaling of small color differences. Color Res Appl 1979;4:83-91.
- Seghi RR, Hewlett ER, Kim J. Visual and instrumental colorimetric assessments of small colour differences on translucent dental porcelain. J Dent Res 1989;68:1760-4.
- Ho R. General Linear Model: Repeated Measures Analysis. In: Ho R. Handbook of Univariate and Multivariate Data Analysis and Interpretation with SPSS. Boca Raton: Chapman and Hall/CRC, 2006:117-82.
- Indrayan A. Approaches for Measuring Quantitative Agreement. In: Indrayan A. Medical Biostatistics. Boca Raton: Chapman and Hall/CRC, 2008:564-7.
- Dahlberg G. Statistical methods for medical and biological students. London: George Allen and Unwin Ltd, 1940:122-32.
- Johnston WM, Kao EC. Assessment of appearance match by visual observation and clinical colorimetry. J Dent Res 1989;68:819-22.
- Chan KC, Fuller JL, Hormati AA. The ability of foods to stain two composite resins. J Prosthet Dent 1980; 43:542-5.
- Cooley RL, Barkmeier WW, Matis BA, Siok JF. Staining of posterior resin restorative materials. Quintessence Int 1987;18:823-7.
- Ertaş E, Güler AU, Yücel AC, Köprülü H, Güler E. Color stability of resin composites after immersion in different drinks. Dent Mater J 2006;25:371-6.
- Khokhar ZA, Razzoog ME, Yaman P. Color stability of restorative resins. Quintessence Int 1991;22:733-7.
- Luce MS, Campbell CE. Stain potential of four microfilled composites. J Prosthet Dent 1988;60:151-4.
- Mutlu-Sagesen L, Ergün G, Ozkan Y, Bek B. Color stability of different denture teeth materials: an in vitro study. J Oral Sci 2001;43:193-205.
- Polyzois GL, Yannikakis SA, Zissis AJ. Color stability of visible light-cured, hard direct denture reliners: an in vitro investigation. Int J Prosthodont 1999;12:140-6.
- Um CM, Ruyter IE. Staining of resin-based veneering materials with coffee and tea. Quintessence Int 1991;22:377-86.
- Koksal T, Dikbas I. Color stability of different denture teeth materials against various staining agents. Dent Mater J 2008;27:139-44.
- Chan KC, Hormati AA, Kerber PE. Staining calcified dental tissues with food. J Prosthet Dent 1981;46:175-8.
- Scotti R, Mascellani SC, Forniti F. The in vitro color stability of acrylic resins for provisional restorations. Int J Prosthodont 1997;10:164-8.
- Nordbo H. Discoloration of dental pellicle by tannic acid. Acta Odontol Scand 1977;35:305-10.
- Joiner A, Muller D, Elofsson UM, Malmsten M, Arnebrant T. Adsorption from black tea and red wine onto in vitro salivary pellicles studied by ellipsometry. Eur J Oral Sci 2003;111:417-22.
- Inokoshi S, Burrow MF, Kataumi M, Yamada T, Takatsu T. Opacity and color changes of tooth-colored restorative materials. Oper Dent 1996;21:73-80.
- Yap AU, Sim CP, Loganathan V. Polymerization color changes of esthetic restoratives. Oper Dent 1999;24:306-11.
- Vogel RI. Intrinsic and extrinsic discoloration of the dentition (a literature review). J Oral Med 1975;30:99-104.
- Eliades T, Gioka C, Heim M, Eliades G, Makou M. Color stability of orthodontic adhesive resins. Angle Orthod 2004;74:391-3.
- Karamouzos A, Athanasiou AE, Papadopoulos MA, Kolokithas G. Tooth-color assessment after orthodontic treatment: a prospective clinical trial. Am J Orthod Dentofacial Orthop 2010;138:537.e1-8.
- Berns RS. Measuring color. In: Berns RS, ed. Billmeyer and Saltzman’s Principles of Color Technology. New York: John Wiley and Sons, 2000;95-105.
- Douglas RD. Precision of in vivo colorimetric assessments of teeth. J Prosthet Dent 1997;77:464-70.
- Karamouzos A, Papadopoulos MA, Kolokithas G, Athanasiou AE. Precision of in vivo spectrophotometric colour evaluation of natural teeth. J Oral Rehabil 2007;34:613-21.