distobuccal

90.7416250 microns and lowest marginal gap was at distobuccal point i.e.

The highest accuracy was observed in the palatal (P) root canal, followed by the first mesiobuccal (MB1), the distobuccal (DB), and the second mesiobuccal (MB2) root canal, respectively.

In the dental cast measurements, the distance between the mesiobuccal and distobuccal cusps of the upper first molars significantly increased by 2.4 mm and 3.3 mm, respectively (p<0.001).

All dental variables were assessed at four sites (mesiobuccal, midbuccal, distobuccal, and midlingual) of each tooth, except the wisdom teeth.

Meanwhile, PPD and CAL were measured on all six sites of the tooth namely mesiobuccal, midbuccal, distobuccal, mesiolingual, midlingual and distolingual.

Due to the wide bucco lingual dimensions of mesiobuccal roots, multiple canals are more common in these roots as compared to the distobuccal and palatal roots (Ahmad & Al-Jadaa, 2014).

The wax molar tooth was fixed in the center of a wax plate (1.2 cm x 4 cm x 3 mm) and trimmed on a surveyor (APF400, Amann Dental Equipment, Koblach, Austria) achieving mesial (8 mm) and lingual guide planes (6 mm) while creating a 0.25 mm undercut area on the distobuccal surface.

A noninvasive intraoral examination was performed in both groups in order to evaluate the oral hygiene by visible plaque index (VPI) in four sites of each tooth (mesiobuccal, midbuccal, distobuccal, and midlingual); the percentage of the examined sites with visible plaque ranged from 0% to 100%.

Pocket depth and clinical attachment level (CAL) were measured for each tooth at 6 sites, namely, mesiobuccal, midbuccal, distobuccal, mesiolingual, midlingual, and distolingual.

Small type: Length shorter than half of the length of the distobuccal root.

Positions of the three canal orifices were as follows: one mesiobuccal, one distobuccal and one palatinal.