Dental
                    cavities  have 
               been                around
          for                           thousands
     of                                      years.
Fossilized                                        remains
     of                                      men  
          and                           women
               from                the  
                    Iron      Age  
                         discovered
                    in        Warwickshire,
               England             showed
          a                             cavity
     rate                                    of   
only                                              8%.  
     When                                    today's
          Warwickshire                  inhabitants
               were                compared,
                    a         remarkable
                         high 
                    cavity    rate 
               of                  48%  
          was                           found.
     A                                       modern
diet                                              consisting
     of                                      highly
          processed,                    sugar-containing
               foods               is   
                    the       most 
                         likely
                    culprit.  The  
               problem             of   
          dental                        cavities
     has                                     been 
steadily                                          increasing
     for                                     the  
          last                          four 
               centuries.          It   
                    continues to   
                         the  
                    present   day. 
               Dental              cavities
          are                           an   
     infection                               caused
by                                                a    
     combination                             of   
          carbohydrate-containing       foods
               and                 bacteria
                    that      live 
                         in   
                    our       mouths.
               The                 bacteria
          are                           contained
     in                                      a    
film                                              that 
     continuously                            forms
          on                            and  
               around              our  
                    teeth.    We   
                         call 
                    this      film 
               plaque.             There
          are                           many 
     different                               types
of                                                bacteria
     in                                      our  
          mouths.                       Luckily,
               only                a    
                    few       are  
                         associated
                    with      cavities.
               When                these
          bacteria                      find 
     carbohydrates,                          they 
eat                                               them 
     and                                     produce
          acid.                         The  
               exposure            to   
                    acid      causes
                         the