Nawaz Chohan, Arham, Assstanl Prcfesscr. P& jdaln carri Community Dentistry, Fa n ity o f Dentistry, U hcre Itecfctf •% O ntei C-oU^e, Latore. Pakistan Director R essach. Departm sniofPeseach, Dow U n versity of Heath' Sciences. Karachi, P is t o n . 'Gij^rai Dentd Fvalit^rs. Rjyach, Saud Ccnesforrieree Dr Aiham Namaz Cfccftai, Assistant Professor. l-te-ddPaejiatrcar»j Com iruiity Dentist-)' .Fasiity of Dentety. Lahcre Mscfcal & Dental College. Letore. Pakistan E-mail aitiflirctohar@ t»lm 3tcom Recswed August 18,2007; ax'epted Sepbniaec 15.2C07, Saudi Arabia