Resistance to vertical root fracture of apicoected teeth using different devices during two root canal irrigation procedures

Abstract

The aim of the present work was to measure the fracture resistance of endodontically treated teeth that were apicoected with different procedures. Seventy-two extracted human maxillary anterior teeth were included in this study. The specimens were randomly assigned to three main groups according to the apical surgery procedures and then two subgroups according to the irrigation protocols during root canal treatment and total of six groups were obtained (n = 12). Group 1: served as a control and apical surgery process was not performed in this group. Group 2: apical surgery process was performed with tungsten carbide fissure bur Group 3: apical surgery process was performed with Er:YAG laser. Subgroup a: In this group, the specimens were irrigated with %5 NaOCl. Subgroup b: 15% EDTA solution was filled into the root canal and then agitated using a 1.5 W/100 Hz diode laser. The specimens were filled and mounted in acrylic resin blocks and compression strength test was performed. Statistical analysis was performed using two-way ANOVA. The statistical analysis revealed that there were no statistical significant differences between apical surgery procedures (groups 1, 2, and 3) (p < 0.05). Apical resection procedures did not affect the fracture resistance Significant differences were determined between the subgroups (p < 0.05). Agitation of the EDTA with the diode laser reduced the fracture resistance of the specimens. The different canal irrigation techniques altered resistance to fracture; however, apical surgery procedures did not altered the resistance to fracture when compared with the control group.

Evaluation of The Effect of Diode Laser on Root Canal Disinfection, Canal Cleanliness, Fracture Resistance of Tooth Structure and Bond Strength to Root Canal Dentin An in Vitro Study

“…The teeth fracture resistance results showed that the teeth irradiated with diode laser reported higher fracture resistance than teeth irrigated with NaOCl/EDTA, these results came in agreement with other studies (19,20) that attributed it to the ability of the laser to glaze, melt, and recrystallize dentin, this molten dentin layer solidifies and seal minor transient surface cracking. These results came in contradiction with other studies (21,22) that reported decrease in the fracture resistance of dentin treated with laser, they claimed that this would be due to the alteration of dentin structural composition, as well as the dentin microhardness.…”

Uso Dos Lasers Na Apicectomia: Revisão De Literatura

“…Esses achados confirmam que o tempo necessário para cortar a mesma quantidade de dentina diminui proporcionalmente com a maior energia fornecida pelo laser (GRGUREVIĆ et al, 2005). Ayranci et al (2018) realizaram um estudo para medir a resistência à fratura de dentes tratados endodonticamente, nos quais foram realizadas apicectomias com broca de carboneto de tungstênio, laser Er: YAG, diferentes protocolos de irrigação e ativação com laser de diodo. A agitação do EDTA 15% com laser de diodo reduziu a resistência à fratura dos elementos dentários em comparação com o NaOCI 5%, porém, em geral, dos seis grupos, os subgrupos de EDTA 15% não modificaram a resistência à fratura.…”

“…A diminuição da dentina apical não alterou a resistência à fratura de dentes que foram reforçados com cimento à base de silicato de cálcio MTA. Os métodos de ressecção e preparo da raiz não afetaram a resistência desses elementos, segundo os autores (AYRANCI et al, 2018).…”

Effect of final irrigation protocols on the fracture resistance of roots with varying dentine thickness

“…For discarding the potential effects of the clinical crowns with varying dimensions on the fracture strength values, all sample teeth were decoronated in a similar fashion to the other studies that evaluated fracture resistance of premolar teeth (19). This procedure also allowed us to prepare the root canal walls with standardized dentinal thicknesses.…”

“…Therefore, the compressive loading was vertically applied to the canal orifices of premolar teeth because, during root canal procedures and occlusion, premolar teeth are subjected to vertical forces more commonly than they are to lateral forces. Similarly, previous studies that investigated the effect of irrigation solutions on the fracture resistance of roots used vertical loading to mimic occlusion forces (19).…”