1. Edentulism and Comorbid Factors
2. Will there be a need for complete dentures in the United States in 2020?
3. Brown , L. R. , Flavin , C. , and French , H.A new economy for a new century. State of the World, ( W.W. Norton & Company , New York , 1999 ) pp. 5 – 7 .
4. Phillips , R. W.Science of Dental Materials,, 9th ed . ( WB Saunders Co. , Philadelphia , PA , 1991 ) p. 516 .