AI Article Synopsis
- * Using 3D-printed models of single-rooted teeth, we found that the location of putty marks on the apex locators was more closely related to the major foramen (the natural opening at the tip of the root) rather than the apical constriction.
- * Our results show that smaller apical constrictions (0.45 mm) led to less accurate electronic measurements, highlighting that variations in constriction position and size can impair the performance of these devices.
Article Abstract
We investigated the interference of apical constriction position and diameter on the accuracy of electronic apex locators using 3D-printed tooth models. Single-rooted tooth models with the same length, canal taper and major foramen, but variation in apical constriction position or size, were designed and 3D-printed. A mounting model was custom-made for precise measurement of both marks (0.5 and APEX/0.0) of two electronic apex locators. The electronic measurements of both devices were correlated significantly to the major foramen rather than apical constriction. The mean measurements of the group with 0.45 mm in apical constriction width were significantly shorter than those of the other groups for both marks of the two devices (p < 0.05). The variations in apical constriction position and width negatively affected the precision of the 0.5 mark of the tested devices. The 0.0 or APEX mark was consistently located the major foramen.
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| http://dx.doi.org/10.1111/aej.12724 | DOI Listing |
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