Dental Age Assessment (DAA) is used to estimate age when date of birth is uncertain. This thesis utilised radiographs archived at the Eastman Dental Hospital and King‟s College Dental Hospital. All teeth developing on the left side were assessed using an eight stage system (Demirjian 1973) and a twelve stage system (Haavikko 1970). The ages of attainment for each Tooth Development Stage (TDS) provided the Reference Data Set (RDS). Dental Age (DA) was calculated using weighted averages. DA estimates using the eight and twelve stage systems were compared, as were the effects of gender and ethnicity. The relative distal root canal widths (RCW) of the 1st, 2nd and 3rd permanent molars were assessed using a five category system designed by the investigator. In addition ossification of the sternoclavicular joint (SCJ) was also assessed using a five stage system (Schmeling 2004). The stages and the categories were related to age. The improvement obtained by combining DA, RCW and SCJ data was explored. A total of 2,622 subjects comprised the RDS with 45% male and 55% female, and an age range of 3 - 35 years. The main ethnic group was White (70%) followed by Black (13%), Mixed (5%) Asian (3%) and „not recorded‟ for 9% of subjects. The mean difference between DA & CA was -0.15 years (SD 1.3) for males and -0.14 years (SD 1.4) for females respectively using 12 stages, and -0.14 years for both genders using 8 stages. The greater ease of use of the 8 stage system makes it preferable for DAA. The combination of DA, SCJ & RCW showed that DA was the best predictor of an individual with teeth still developing. For subjects with no teeth still developing, SCJ can be used to estimate the age of an individual.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:565328 |
| Date | January 2011 |
| Creators | Parekh, S. |
| Publisher | University College London (University of London) |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://discovery.ucl.ac.uk/1317781/ |
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