Influence of the Apical Preparation Size and the Irrigant Type on Bacterial Reduction in Root Canal–treated Teeth with Apical Periodontitis

Rodrigues, Renata Costa Val; Zandi, Homan; Kristoffersen, Anne Karin; Enersen, Morten; Mdala, Ibrahimu; Ørstavik, Dag; Rôças, Isabela N.; Siqueira, José F.

doi:10.1016/j.joen.2017.02.004

Cited by 139 publications

(128 citation statements)

References 33 publications

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“…The creation of STL datasets for each premolar root canal volume allows for non-invasive and efficient evaluation of several 3D parameters ex vivo. Several studies have shown that apical enlargement facilitates removal of bacteria (Rollison et al 2002, Rodrigues et al 2017. This definition is based on studies evaluating how far microorganisms can penetrate dentinal tubules (Markvart et al 2012), and the mean RMS error of~60 lm in the present study was comparable with their value of~65 lm for the entire root canal in what was by them subjectively defined as large roots.…”

Section: Tablesupporting

confidence: 70%

Validation of contralateral premolars as the substrate for endodontic comparison studies

2018

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Section: Tablesupporting

confidence: 70%

Validation of contralateral premolars as the substrate for endodontic comparison studies

2018

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“…Such eccentricities are possibly incorporated into larger apical preparations, thus enhancing the mechanical cleaning efficiency (Falk & Sedgley , Rodrigues et al . ). It has been shown (Lacerda et al .…”

Section: Discussionmentioning

confidence: 97%

Influence of apical preparation size and irrigation technique on root canal debridement: a histological analysis of round and oval root canals

Lee

Khan

et al. 2019

Int Endodontic J

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Aim To examine the debridement of round and oval root canals prepared to two apical sizes with and without ultrasonically activated irrigation. Methodology Mandibular premolars with round (n = 48) and oval (n = 48) root canals were pair‐matched after microCT scanning and randomly divided into two experimental groups (n = 20): group 1, rotary NiTi to size 20, .04 taper; group 2, rotary NiTi to size 40, .04 taper. Specimens were subdivided into two subgroups (n = 10): subgroup A, syringe and needle (SNI); subgroup B, ultrasonically activated irrigation (UAI). Untreated canals (eight oval and eight round) served as controls. Specimens were processed for histological evaluation for measurement of the remaining pulp tissue and debris (RPT), and the perimeter percentage of root canal area untouched by the instruments (PRAU). Following assessment of normality, multiple‐way anova models were used to study the effects of preparation size, irrigation technique and canal cross‐sectional shape, and their interactions on the RPT and PRAU (α = 0.05). Results All experimental groups had significantly less RPT than the control (P < 0.05). Both the preparation size (20 vs. 40) and the irrigation technique (SNI vs. UAI) had a significant effect on RPT (P = 0.006 and P < 0.001, respectively). Groups irrigated with SNI always had significantly greater RPT than those irrigated with UAI, irrespective of the preparation size (P < 0.001). Canals prepared to size 20 had significantly greater RPT than those with size 40 in the SNI subgroup (P < 0.001), but there was no significant difference in the UAI subgroup (P = 0.481). Conclusions Root canals prepared to a larger size (40) were cleaner than those prepared to a smaller size (20), when irrigation was performed with a syringe and needle. When the irrigant was ultrasonically activated, smaller preparations resulted in canals that were as clean as larger preparations. This finding was common to both round and oval canals of freshly extracted premolars with vital pulp tissue.

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“…, Rodrigues et al . ). Moreover, the disinfecting benefits of using NaOCl irrigation are more evident with large apical preparation sizes (Shuping et al .…”

Section: Discussionmentioning

confidence: 97%

“…, Rodrigues et al . ). Apical enlargement also permits deeper penetration of the irrigation needle, improving the flushing action of irrigants, and consequently apical canal cleaning (Albrecht et al .…”

Section: Discussionmentioning

confidence: 97%

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Effects of increased apical enlargement on the amount of unprepared areas and coronal dentine removal: a micro‐computed tomography study

et al. 2017

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Influence of the Apical Preparation Size and the Irrigant Type on Bacterial Reduction in Root Canal–treated Teeth with Apical Periodontitis

Cited by 139 publications

References 33 publications

Validation of contralateral premolars as the substrate for endodontic comparison studies

Validation of contralateral premolars as the substrate for endodontic comparison studies

Influence of apical preparation size and irrigation technique on root canal debridement: a histological analysis of round and oval root canals

Effects of increased apical enlargement on the amount of unprepared areas and coronal dentine removal: a micro‐computed tomography study

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