Worldental Daily New Delhi, 12 September 2014

Friday, 12 September 2014 News Visit us on stand for an exciting new range of Dental burs being launched for India. Great introductory offers on stand – A90 & A93 WORLD LEADERS IN PRECISION DENTAL INSTRUMENTS Receive entry to an invite only launch party attended by India’s world cup winning cricket Captain, Kapil Dev* when you purchase Prima Dental burs on stand * Minimum quantities apply AD A similar trend was observed in dental emergence in a study that found advanced emergence in Japanese children from the 1980s compared with children in 1934.6 Detected mostly in the permanent dentition, and to a minimal extent in the primary dentition, this finding was verified by research involving children in Finland, Germany and Hong Kong. Dentaldevelopmentisasequen- tialprocessthatvariessubstantially between the sexes and between populations with different ethnici- ties. For example, many studies have reported advanced dental de- velopment in females compared with males, a finding that is preva- lent in all population groups. Simi- larly, advanced dental emergence has been observed in African-Amer- ican children compared with Chi- nese and Japanese children. Various secular trends have also been found in maxillary and man- dibular dentition. There is wide agreementthatthelatterismoread- vanced in dental maturation, as well as emergence, since mandibular teeth are the first to erupt in the oral cavity in both the primary and per- manent dentition. Nadler reported advanced den- tal maturation based on evaluation of only the growth pattern of a mandibular canine. The reason for this approach comes from an earlier study that found a correlation be- tweenthematurationofmandibular canines and ossification centres in the hand.This study also concluded that a strong relationship exists be- tween dental and skeletal develop- ment.5 Theuseofasingletoothtype to analyse secular trends has been criticised by several authors for ig- noring that each tooth type exhibits different patterns of maturation. It has been suggested that all devel- oping teeth must be included in the analysis in order to confirm a secu- lar change. In our own study of 5- and 6-year-old children in Hong Kong,wefoundacceleratedmatura- tion of permanent teeth in children bornin2001comparedwithchildren born in 1981. However, this trend was observed only in the maxillary dentition. As agreed by other inves- tigators, in both year cohorts, fe- males showed advanced develop- ment compared with males.7 With such strong evidence, we need to bring the applicability of common dental atlas charts, such as those developed by Schour and Massler, whose tables and charts are based on institutionalised American Caucasian children in the 1920s,8 to the current population into question. A recent study con- ducted in London tested the appli- cability of old and modern dental charts and found that the older charts were inaccurate.3 However, most clinical textbooks in dentistry still reproduce these charts, mainly because few other population-spe- cific dental charts exist. Thereisaneedforevidence-based dental charts created from modern andhealthysamplesidentifiedbysex and ethnicity. Once created, they could not only serve as an eminent tool in forensic dentistry for estimat- ing the age of subjects with undocu- mented birth records, but also pro- vide insight on current dental devel- opment standards that could be utilised for appropriate time-related management of dental conditions. A list of references is available from the publisher. Interdisciplinarymanagementofmissingleftlateralincisorandimpactedcanineofachinesegirlaged12years. Dentalpanoramicradiographshowingdevelopmentofpermanentteethina11-year-oldchineseboy.

Worldental Daily New Delhi, 12 September 2014

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