The influence of dental operating microscopes in locating the
mesiolingual canal orifices.
At the
mesiolingual border of the tooth a crest is present i.e.
In the group II (PEEK), highest marginal gap was at
mesiolingual point i.e.
Root canal preparation was performed using R25 Reciproc Blue (VDW, Munich, Germany) to remove guttapercha from all canals and refined with Mtwo tip size 40, taper 0.04 (Sweden & Martina, Padova, Italy) in the distal root canal, whereas mesiobuccal and
mesiolingual canals were prepared using Mtwo tip size 30 and taper 0.05.
An external groove was observed in 41 cases (39.1%)--37 on the
mesiolingual side (90.2 %), three on the distolingual side (7.3%) and one on the lingual side (2.4%).
Meanwhile, PPD and CAL were measured on all six sites of the tooth namely mesiobuccal, midbuccal, distobuccal,
mesiolingual, midlingual and distolingual.
(2018) (31) NC Max M: maxillary molars; Max M IV: Maxillary molars mesiobuccal canals Vertucci's type IV; Mand M IV: Mandibular molars mesial canals Vertucci's type IV; Mand M II: Mandibular molars mesial canals Vertucci's type II; MB: Mesiobuccal canal; DB: Distobuccal canal; ML:
Mesiolingual canal; D: Distal canal; P: Palatal canal; NS: Not specified; NC: No intergroup/intragroup comparison; BR: BioRaCe; BTR: BT-Race; GT: Greater taper; PT: ProTaper; PTG: ProTaper Gold; PTN: ProTaper Next; PTU: ProTaper Universal; SAF: Self-Adjusting FIle; TF: Twisted file; TFA: Twisted File Adaptive Table 2.
Pocket depth and clinical attachment level (CAL) were measured for each tooth at 6 sites, namely, mesiobuccal, midbuccal, distobuccal,
mesiolingual, midlingual, and distolingual.
The representative photo of the isthmus is shown in Figure 4, (d1) and (d2), and isthmus connecting the
mesiolingual and the distal canals was observed in SEM images (Figure 5, (b1)).
In each subject, 6 sites were evaluated on each tooth present (distobuccal, midbuccal, mesiobuccal, distolingual, midlingual, and
mesiolingual).