Influence of canal curvature on the amount of apically extruded debris determined by using three‐dimensional determination method

Abstract

The aim of this study was to introduce a new three-dimensional curvature classification method to evaluate the canal curvature and analyse its effect on the amount of debris extrusion during reciprocating preparation. Freshly extracted mandibular molar teeth were collected. After performing access cavities, periapical radiographs were taken on both mesio-distal and bucco-lingual planes of each tooth using a digital sensor. The radii of the curvature were calculated and a new three-dimensional classification method was used to classify canal curvature, based on radius as follows: Three-dimensionally slight, moderate and severe curve root canal. Fifteen teeth for each curvature sort were randomly chosen for canal instrumentation. The extruded debris was collected in pre-weighed Eppendorf tubes and calculated. A significant difference was noted between root canals with slight and severe three-dimensional curvatures (P < 0.001). It can be concluded that root canal curvature plays a significant role in the amount of extruded debris.

Comparison of apical debris extrusion using EDDY, passive ultrasonic activation and photon‐initiated photoacoustic streaming irrigation activation devices

“…In an in vivo clinical study, Arias et al (24) stated that the frequency of pain after endodontic treatment was significantly higher in teeth with curved root canals than single and straight roots. Likewise, Karataslioglu et al (25) stated that the amount of apical debris extrusion increased in accordance with increments in the degree of canal curvature in teeth. In light of the literature, in this study, we used mandibular molar teeth with mesiobuccal canals to compare the amount of apical debris extrusion with different irrigation activation systems.…”

Quantitative evaluation of apically extruded debris using TRUShape, TruNatomy, and WaveOne Gold in curved canals

“…Tooth type and curvature influence the amount of extruded debris [ 20 ]. Mandibular molars with curved mesiobuccal root canals were used to simulate clinical situations and present the challenges the clinician faces during instrumentation [ 21 ].…”

Cyclic fatigue resistance for six types of nickel titanium instruments at artificial canals with different angles and radii of curvature

“…The six NiTi instruments are extensively used in the clinic, and their resistance to cyclic fatigue has been examined in some studies. The angle and radius of curvature of the root canal are generally considered the two key factors for the fatigue resistance of NiTi instruments 16,17) . Root canals with a curvature of 25-70° and S-shape curvature are classified as severely curved root canals 18,19) .…”

“…Root canals with a curvature of 25-70° and S-shape curvature are classified as severely curved root canals 18,19) . A root canal with a curvature radius greater than 5 mm and less than 25 mm was considered moderate curvature 17) . Therefore, to evaluate the effect of the angle and radius of curvature of the root canal on cyclic fatigue for the six types of NiTi instruments, artificial canals with curvature angles of 45°, 60°, and double 45° as well as radii of curvatures of 8, 6, and 4 mm were considered in this study.…”