GENERAL BIBLIOGRAPHY
1. V.B. Haywood and H.O. Heymann. Nightguard vital bleaching. Quintessence Int. 1989; 20(3): 173-6.
2. B.B. Herlofson, and P. Barkvoll. The effect of two toothpaste detergents on the frequency of recurrent aphthous ulcers. Acta Odontol Scand 1996; 54: 150-153.
3. B.B. Herlofson, and P. Barkvoll. Oral mucosal desquamation caused by two toothpaste detergents in an experimental model. Eur J Oral Sci 1996; 104: 21-26.
4. K.K. Mäkinen and A. Scheinin. Xylitol and dental caries. Ann. Rev. Nutr. 1982; 2: 133-150.
5. L. Trahan. Xylitol: a review of its action on mutans streptococci and dental plaque - its clinical significance. International Dental Journal 1995; 45: 77-92.
6. P. Isokangas, K.K. Mäkinen, J. Tiekso and P. Alanen. Long-term effect of xylitol chewing gum in the prevention of dental caries: A follow-up 5 years after termination of a prevention program.Caries Res 1993; 27: 495-498.

YOTUEL BIBLIOGRAPHY
7. N. Akal, H Over, A. Olmez and H. Bodur. Effects of Carbamide Peroxide containing bleaching agents in the morphology and subsurface hardness of enamel. The Journal of Clinical pediatric Dentistry 2001 (USA); 25: 293-296.
8. I.A. Pretty, W.M. Edgar and S. M. Higham. The effect of bleaching on enamel susceptibility to acid erosion and demineralisation. British Dental Journal 2005; 198: 285-290.