RESUMEN
Statement of Problem: One of the considerations regarding the space analysis in study casts is the issue of speed and precision in analysis
Purpose: This research aimed to design a software to conduct space analysis and evaluate its accuracy compared to manual space analysis
Materials and Method: This research was conducted in two stages: Exploratory and Cross- Sectional. The subjects were selected randomly from patients between 7 to 11 years of age referring to the orthodontics clinic at the dentistry school of the Islamic Azad University. About 30 study models [15 pairs] were randomly selected. Space analysis with manual method was performed .Space analysis with the aid of Cyber Space Analysis software was also carried out by locating the required landmarks on digital images of dental casts. The accuracy of this software in comparison with the manual method in space analysis for mixed dentition was evaluated using T student test
Results: The average time required for space analysis using the software was 3.4 minutes as compared to the manual method which took 7.81 minutes on average. The results from software-assisted space analysis showed no significant difference with that obtained from the manual method [p < 0.0001]
Conclusion: The results from software-assisted space analysis were similar to those of the manual method. However, software-assisted space analysis is carried out more quickly than the manual method
RESUMEN
In regard to the prevalence of orthodontic treatments, the importance of relapse and complications followed by relapse are overlooked. This is further impacted by information gaps in Iranian Dental Journals and deficiencies in previous studies. In this study we have assessed the outcome of orthodontic treatment, relapse and related factors in patients in the Private orthodontic clinic in Tehran in 2009.This study was performed using a cross sectional technique. The samples consisted of all patients with various kinds of malocclusions and the presence of pretreatment, post treatment dental casts with at least 4 years post treatment. In these patients, we also prepared post retention dental casts. The indexes, including irregularity index, arch length, inter canine width, inter premolar width, and inter molar width in both upper and lower jaws were evaluated. The change in each index out of normal range indicated relapse. The role of related factors such as sex, patient's age at the beginning of the treatment, type of treatment, duration of the treatment, the length of retention, the type of malocclusion, and family history were analyzed using Chi Square test. This study was performed on 52 cases [26%] out of 200 cases which had complete records and positive response to recall. During the study period at least 500 patients were treated. The result of relapse was 61.5% without considering the irregularity index [42.3%]. The most important relapse index was maxillary irregularity index [37%], followed by the mandibular irregularity index [17%] and, the least significant index was mandibular arch length [2%]. Relapse was increased in patients with less than 24 months of treatment. [P<0.0001] Relapse was high regardless of irregularity index. Considering its complications, we suggest further studies to elucidate its etiology. This should be followed by preventive measures to decrease the rate of relapse