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Show Columbia U . , Takes TakesNew TakesNew New Step Toward Toward'Painless Toward'Painless TowardPainless 'Painless Painless ' Dentistry ' NEW YORKA YORK-A YORK A YORK -A A - A new step steptoward stepIoward stepoward toward Ioward ( "painless painless "pamless pamless " dentIstry dentistry"seems dentistryseems " seems to have been taken ta1.en ta1en . by aColumbia a aColumbIa aColumbia ColumbIa university professor professorhCl professorhete professorheie hCl hete e The latest de\ de development deelopment \ elopment Is Isthe isthe Isthe the dIsco\ dIsco discovery dIscoery \ ery of Dr L L Hartman Hartmanof Hartmanof of a 'desensltlzer desensltlzer desensitizer 'desensitizer ' ' that th'lt thlt thit ' docs does awny away awnywith awaywith awaywith with the painful painrul sensations durlnJ durlnJthe durin duringthe , the necessary drilling dr1l11ng before a cav cay- cay cayity cav.Ity cavIty . - Ity In iii a tooth can be filled filledTlie filledThe filledThe Tlie The desensltlzer desensItizer which Doctor DoctorHartman DoctorUartnian DoctorHartman Hartman Uartnian dl discovered dIscoered co\ered co ered \ % after nearly nearlytwent nearlytwenty nearlytwenti twent twenty : } years ye'lrs yelrs yetrs ' of research Is a color color- colorless colorless colorless - less fluid Unlike other anesthet anesthet- anestliet- anestliet anesthetIcs anestlietics anesthetics - - ics \ which \ hlch must be Injected into the thenenes theneres tlienerves nenes neres or plug plugs of the teeth , , Doctor DoctorHrtman's DoctorH'irtman's DoctorHartman's DoctorHartmans H\rtman's H rtman's rtmans H'irtman's Hirtmans ' \ ' ' fluid Is applied to thedentin the thedentin thedentin dentin , the substance \ which \ hlcb forms formsthe ( formstlie orms ormsthe the bulk of the tue hard part of the theteeth theteeth theteeth teeth It takes tahec ; a minute or a mIn mInute mm mmute minute ute and nnd a half halt to take tahe effect and andthe andthe andthe the pain killing hl11lng effect lasts from fromtwenty fromtwenty fromtwenty twenty minutes to an hour , gh ghing ghingplenty givingplenty Ing- Ing Ingplenty - plenty of time to prepare almostany almost almostnny almostany nny any cavity for filling fll11ng . , Doctor Hart Hart- Hartm'in Hartman . - man m'ln mln m'in min ' ' explained e\plalned e plalned : . \ There are no DO un- un unple'lsant unpleisant un unpleasant - - pleasant ple'lsant plelsant pleisant ' after effects etects ! and nnd the pulp pulpof pulpof pulpof of the tooth remains rem'1lns rem1lns rem'iins remiins ' ' normal norm'll normll normil ' . , The chemical composition of the thedesensltI thedesensitizer thedesensltlzer desensltI desensitizer r has not been nnnounced announced nnnouncedand announcedand announcedand and the fluid Is still ctill ; nameless |