الفهرس 
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Abstract
The outcome of study is to assess indirect bonding transfer accuracy by using three-dimensional imaging and steroelithographic printing technique.
A clinical double- tailed trial was done on 10 patients who were planned to be bonded by a full digital indirect bonding tray for the upper arch by coupling two technologies: cone beam computerized tomography (CBCT) and steroelithographic 3D printing. By using mimics software, a DICOM file of brackets and patients was segmented to get steroelithographic (STL) file. Virtual bracket positioning and tray design were done using 3-matic software. DLP -3D printing technique- was used for printing tray with indentations for brackets seating. Intra- oral scanning of each patient was held after indirect bonding to get the STL file. The Vertical brackets positions of the STL post- bonding for each tooth in each patient, with a total of 120 units, were measured. Intra class correlation and the Bland Altman plot test were used to assess the accuracy of the vertical bracket position of the full digital transfer tray.
Our results showed excellent reliability and internal consistency for the new technique in general. A high level of agreement was found, with the mean difference clinically accepted. For the five groups, there was good reliability for lateral incisors, canines, and premolars and acceptable reliability for the central incisors and molars group. There was high agreement for the lateral incisors, canines, and premolars groups. On the other hand, the central incisors and molars groups show proportional bias. However, the mean differences of all group clinically accepted.
Under the conditions of the current study the following conclusions are evident:
1. The reliability of the technique was excellent.
2. According the teeth type, central incisors and molars’ groups show the least reliability but it was accepted.
3. Linear vertical deviations were within the clinical accepted range (+/- 0.5 mm) and were in the gingival direction.
4. High agreement between the standard and the new digital technique, however the central incisors and molars showed directional bias.
5. According comparison between the five groups, There was no statistical difference and all clinical accepted
6. This full digital indirect bonding technique was accurate and reliable.
Recommendations
It is recommended for future study to consider:
1. Using different resin material which will be with flexible consistency or use segmented tray with separate molar section.
2. Compare between different full digital technique to conduct the most accurate, the most reliable and the least expensive.
3. Measuring the effect of the malocclusion degree on accuracy of transfer using different indirect bonding techniques.