ABSTRACT
Statement of the Problem: Determining the crown-root ratio is crucial in many dental clinical decisions. There are no reliable data presented for Iranian population
Purpose: The aim of this study was to assess the root-crown ratio of permanent teeth with regards to the relationship of gender and jaw type using panoramic radiographs. The reliability of method was also assessed
Materials and Method: The crown and root lengths of teeth were measured by a digital caliper on panoramic radiographs of 185 individuals except for the third molars. A total of 1994 teeth was studied and 50.8% of the teeth belonged to males and 49.2% belonged to females. The modified Lind method was applied
Results: The highest mean root-crown ratios in both arches of both genders were obtained in the second premolars, followed by the first premolars and canines. In both genders, the lowest root-crown ratios were found in the maxillary central incisors. In male patients, the mean root-crown ratio was higher [p= 0.003] than that of females. Using Bland-Altman analysis, a non-significant difference of 0.006 [95% CI: -0.012-0.024] and 0.0002 [95% CI: -0.011-0.011] were found for intra-observer and inter-observer agreement, respectively
Conclusion: Assessment of the root-crown ratio in permanent dentition could be performed on panoramic radiographs with acceptable reproducibility in an Iranian Population. Considering observed differences, our findings suggest that for the accurate assessment, this ratio must be calculated for male and female patients and also for the upper and lower jaws, separately
ABSTRACT
Utilization of information system in management is necessary. Statistical Process Control [SPC] is one of suggested tools in quality management system. In this study, processes of medical record unit in Gharazi Hospital [Isfahan] are studied using SPC tools. It is a descriptive, retrospective and trend study which was carried out by assembling indicators for some processes in medical record unit from 2003 to 2008. After Library studies, suggested indicators by experts [for Process controlling] were collected through 2 checklists. For quantitative indicators of medical records evaluation, all admitted patients during study period and for time assessing about 1500 patients were chosen randomly. Data were analyzed using Excel software. Findings showed that during study period, the average time for patient discharge order [by doctors] was at 9:54 a.m. and patients waiting time in discharge process decreased [with the average of 53 minutes]. In quantitative evaluation of medical records deficits, accepted fault rate [or the base line] consumed as about 6%. Gharazi Hospital tries to control tolerance of its processes by using SPC tools and maintaining some internal standards as baselines. These baselines may be shared with other hospitals and help to produce national and regional standards