A Comparative Study of Three Different Root Canal Curvature Measurement Techniques and Measuring the Canal Access Angle in Curved Canals

Methods for measurement of root canal curvature: a systematic and critical review

“…In addition to curvature angle measurement, ten described its position, height, radius, length and shape considering clinical and proximal views (Table 3). Moreover, 11 of the radiography-based investigations placed K-files (sizes 08, 10, 15) or silver points with the purpose of facilitating root canal curvature visualisation (Southard et al 1987, Backman et al 1992, Luiten et al 1995, Thompson et al 1995, Hankins & ElDeeb 1996, Harlan et al 1996, Lopes et al 1998, Dobo-Nagy et al 2000, Sch€ afer et al 2002, Iqbal et al 2003, G€ unday et al 2005. Five studies used micro-computed tomography (lCT) (Peters et al 2000, Bergmans et al 2001, Lee et al 2006, Eaton et al 2015, Dannemann et al 2017, two used cone-beam computed tomography (CBCT) (Estrela et al 2008, Choi et al 2015, and another two employed dental panoramic tomography (DPT) (Fuentes et al 2015(Fuentes et al , 2018.…”

Piecewise Straight Line Approximation of Curve Existing in Slightly Curved Mesiobuccal Root Canal of Mandibular First Molar: A Radiographic Investigation

“…This finding enhances the importance of straight line access and preflaring. Günday et al, (2005) showed that canal access angles of two canals with different canal geometry can differ, even if they have the same canal curvature as measured using the Schneider angles. The maximum curvature occurred at the middle segment of the curve and the most frequent was the starting point of the middle segment.…”

Shaping Ability of NiTi Rotary versus Stainless-Steel Hand Instruments in Curved Root Canals of Extracted Teeth

“…Canal curvatures were determined in a more exact manner (12) measuring two angles, Schneider angle (S) (13) in combination with canal access angle (CAA) (14) and the related parameters including height (X) and distance (Y) of the canal curvature, and radius of the curvature (R) (15) (Figure 1). The specimens were divided to create three groups as balanced as possible in terms of these parameters (n=15).…”