ABSTRACT
Background & objectives: Various indices are available to record different grade of severity of dental fluorosis. These indices have chances of inter- and intra- examiner variability. Therefore, study was conducted to compare three different indices for recording dental fluorosis to find out the best and most practical index of recording dental fluorosis for field studies in children living in a fluoride endemic area. Methods: The severity grades were recorded in 300 schoolchildren aged 12-15 yr having dental fluorosis of low, medium and high fluoride areas using three different indices, viz. Dean's fluorosis index (1942), tooth surface index for fluorosis (TSIF, 1984) and ICMR index (2013). Dean's index was used as gold standard. Results: The occurrence of moderate and severe cases was higher as per the Dean's index and of mild and severe cases was higher as per the TSIF and the ICMR index. The mean time required for recording dental fluorosis as per Dean's index and TSIF was similar and almost double (1.25�05 min) of that required for ICMR index (0.68�20 min). The intra-examiner variability was found to be least in the ICMR index compared to Dean's index and TSIF. Interpretation & conclusions: The ICMR index is a simple index with objective scores and takes less time in recording the dental fluorosis as compared to Dean's index and TSIF in field studies.
ABSTRACT
exposure during enamel formation. Increased and decreased in fluorosis prevalence may also reflect to the different ways of measuring the disease. The choice of measuring fluorosis is depends on the objective of the assessment such as assessing public health significant of fluorosis in the population or assessing the detailed of biological effects of fluoride. These differences in requirement have led to the adoption of many indices and assessment methods of enamel fluorosis, which subsequently led to evaluation of examiner agreement between them. Several indices were developed to measure dental fluorosis in the 20th century. These include fluorosis specific indices such as Dean’s Index; the Thylstrup and Fejerskov Index; the Total Tooth Surface Index; and the Fluorosis Risk Index. Non-specific descriptive indices such as the Developmental Defects of Enamel index have also been used to record fluorosis. Fluorosis has most commonly been recorded using clinical examinations and photographs. Recent developments have seen the use of a Visual Analog Scale and automated grading systems such as Quantitative Light Fluorescence emerge as possible enhancements to fluorosis scoring. This article aims to review existing indices and new methods in measuring dental fluorosis, together with examiner reliability across different methods and indices.
Subject(s)
Fluorosis, Dental , FluoridesABSTRACT
Background & objectives: The Indian Council of Medical Research (ICMR) formulated a Task Force on dental fluorosis and recommended the subgroup to develop a simplified index for identification and grading of dental fluorosis to be used by the health workers. This study was conducted to pre-test the ‘ICMR Index for Dental Fluorosis’ in the field to check its reliability and reproducibility. Methods: A total of 600 photographs were taken, 150 in each grade of fluorosis by screening 14-17 yr school children from eight schools of Hisar (Haryana) and South west Delhi. Eighty photographs were finalized (20 in each grade) before calibration to be used for training of field workers. Calibration exercise was conducted involving the five member survey team on 100 diagnosed cases of dental fluorosis. The members again screened 74 children with dental fluorosis in the field to categorize in to different grades of fluorosis for assessment of inter-examiner reliability. Results: The ICMR criteria showed more difference in agreement in very mild and mild categories during calibration. The inter-examiner reliability (κ) ranged from 0.59-1. The criteria was further modified and inter- examiner reliability (κ) found to be 0.83-0.98 which was almost perfect agreement. Interpretation & conclusions: The tool developed by the ICMR to assess dental fluorosis can be used in a field set up by non-dental personnel reliably with high degree of reproducibility.
ABSTRACT
Postgraduate education, training and assessment in Forensic Medicine in Sri Lanka are managed by the Postgraduate Institute of Medicine (PGIM), University of Colombo. There are several components in the postgraduate examinations; theory, clinical case presentation, a full autopsy and presentation, Objective Structured Practical Examination (OSPE), Histopathology component and a viva voce examination where a pass grade is compulsory in each component. This includes the 20 minute viva voce examination as well. The viva voce can be used to test intellectual processes such as decision making and justification of opinions; abilities paramount to an effective expert medial witness. However, it has been dropped by many Examination Boards due to several shortcomings. Poor inter examiner reliability is one example that has been quoted as a serious drawback. Certain measures can be taken to increase the validity and reliability of the viva voce, some of which have been introduced in Sri Lanka by the Board of Study in Forensic Medicine, PGIM. Improvements to the viva voce should be an ongoing process. This paper will 1) discuss the value of the viva voce in postgraduate examinations in Forensic Medicine, 2) study its pass/fail reliability as a compulsory component, 3) examine how its shortcomings could be overcome, 4) examine the evolution of the viva voce in postgraduate examinations in Forensic Medicine in Sri Lanka and 5) make recommendations for the future.