Home About us Contact
|
Home About us Contact | ||
|
|
||
Primary Molar Teeth (primary + molar_tooth)
Selected AbstractsAccuracy of an electronic apex locator in primary teeth with root resorptionINTERNATIONAL ENDODONTIC JOURNAL, Issue 2 2009O. Angwaravong Abstract Aim, To evaluate whether root resorption of primary molar teeth affects the accuracy of the Root ZX apex locator and to compare the Root ZX at different meter readings with direct canal measurement. Methodology, Sixty extracted primary molar teeth with root resorption affecting one sixth to one third of root length were used. The teeth were embedded in an alginate model. A K-type file was used in association with a Root ZX apex locator to measure canal length. Measurements were recorded using the Root ZX meter reading ,Apex' and ,0.5 bar'. Actual tooth length was measured with a K-file to the major foramen. All measurements were read under a stereomicroscope at 15× magnification. The deviation of the Root ZX measurement from the actual canal length was determined. Results, Mean differences between Root ZX length meter reading ,Apex' and actual length were 0.01 ± 0.23 mm whereas mean differences between Root ZX length meter reading ,0.5 bar' and actual length were ,0.33 ± 0.30 mm. The Root ZX was 96.7% accurate to within ± 0.5 mm of the apical foramen when compared with the actual canal length of primary molars with root resorption. Conclusions, Using a criterion of ± 0.5 mm, the accuracy of the Root ZX was high and not affected by root resorption. When compared with direct canal measurement, the error in locating the apical foramen was smaller with measurement at meter reading ,Apex' than meter reading ,0.5 bar'. [source] The Occurrence of Dental Pain and Extractions over a 3-Year Period in a Cohort of Children Aged 3-6 YearsJOURNAL OF PUBLIC HEALTH DENTISTRY, Issue 2 2008M. Tickle PhD Abstract Objectives: To describe the occurrence of dental pain and extractions in young children in relation to the caries and restoration history of their primary molar teeth. Methods: A prospective cohort study of 739 children aged 2.8 to 6.2 years attending 50 dental practices in the North West of England followed for 3 years. Incidence rates for pain and extraction in primary molar teeth were calculated for children with and without dental caries. Tooth years at risk of extraction or pain were calculated for each primary molar according to whether they were caries-free, carious and unrestored, or restored. Results: A total of 119 (16.1 percent) children had caries at recruitment and 157 developed caries during follow-up. Each year approximately one in five children with caries, but only one in 100, who was caries-free, presented with dental pain. In the whole population, each year, approximately one in 40 children had a primary molar tooth extracted but in children with caries it was one in 10. In the total cohort, incidence of pain was higher in unrestored carious teeth than restored, but incidence of extraction was higher in restored than in unrestored teeth. Conclusion: The majority of children attending general dental practice remained caries-free and did not experience pain or extraction over 3 years. Children with caries had a substantial risk of developing pain or having an extraction. The study was unable to demonstrate that restoring carious primary molar teeth prevents pain and extraction. [source] | ||||||||||