An in vitro study of spreader loads required tocause vertical root fracture during lateral condensation

Pitts, David L.; Matheny, Harvey E.; Nicholls, Jack I.

doi:10.1016/s0099-2399(83)80058-2

Cited by 108 publications

(79 citation statements)

References 5 publications

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“…Using a spreader to make space for accessory cones in lateral condensation can induce dentinal damage (Holcomb et al 1987;Pitts et al 1983;Wilcox et al 1997). The main concern with the compaction of the filling material is the formation of tensile stress on the canal walls (Blum et al 1998a(Blum et al , 1998b exceeding the structural limit of the dentin and causing a defect.…”

Section: Root Canal Obturationmentioning

confidence: 99%

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Root-originating dentinal defects: methodological aspects and clinical relevance

2017

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It was in the 1980s when the association between root-filling procedures and dentinal microcracks was made. Nowadays, root-originating microcracks, also known as dentinal defects, are recognized as a possible precursor that is part of the longitudinal process of root-originating fractures. The presence of dentinal defects has been shown to significantly decrease the outcome through a periapical microsurgery model. Several in vitro articles have been published in the past years in regards to dentinal defects, but most of them have serious methodology concerns that will be discussed in this review. A total grasp of the development and the role dentinal defects play in endodontics is crucial to the specialty. This review aims to discuss dentinal defects and their causative factors and the research models that have been used and their clinical significance. Through a comprehensive critical review of the literature, this article will express the need for further in vivo clinical research and better ex vivo methods that can replicate the clinical setting to answer several remaining questions about the development of and the role dentinal defects play in endodontics.

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Section: Root Canal Obturationmentioning

confidence: 99%

“…It was in the 1980s when Pitts et al and Holcomb et al described the possible association among root-filling procedures and dentinal microcracks or ROFs (Holcomb et al 1987;Pitts et al 1983). An interesting finding of theirs was that in some samples, the fracture did not fully spread from the canal to the root surface.…”

Section: Introductionmentioning

confidence: 99%

Root-originating dentinal defects: methodological aspects and clinical relevance

2017

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“…Presently, there is still a limited amount of treatment in extraction of root or resection of fractured tooth [3][4][5]12,16]. VRF generally occurs as a result of trauma, root canal therapy, stress produced during post cementation [17], among other factors [4,16,[18][19][20].…”

Section: Biomechanical Preparationmentioning

confidence: 99%

“…Previous studies have demonstrated that the main determining factors for the occurrence of root fractures are: the design of the spreaders [22], combined with the stress generated during compaction [18,23], canal width, canal taper, size and other characteristics of the tooth itself [23,24]. Moreover, pre-existing cracks, craze lines or incomplete fractures, especially those in direct contact with the root canal, may propagate and develop into fractures after the endodontic treatment [15].…”

Section: Biomechanical Preparationmentioning

confidence: 99%

Incomplete vertical root fracture associated with lateral compaction technique: a microscopic analysis

Chávez-Andrade¹

2013

BDS

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Objective:This study evaluated the effects of root canal obturation employing lateral compaction technique and spreader load of 1.5 kg on the incidence of complete (CVRF) or incomplete vertical root fractures (IVRF). Material and Methods: Twenty-seven distal roots of extracted human mandibular molars were used. All root canals were prepared by biomechanical step-back technique and obturated by lateral compaction technique. The prepared roots were distributed into two groups: G1- experimental (n=17) and G2- control (n=10). During obturation, load of 1.5 kg was applied to a size 30 finger spreader. Pre- and post-obturation images of the coronal portion of the roots were captured by inverted digital microscopy and analyzed by one trained examiner. Data were evaluated by Fisher’s test (p < 0.05) using GrapH Pad Prism 5.0. Results: No roots exhibited CVRF. All fractures observed before and after obturation were IVRF or “other defects”. In G2 (control group), there was no increase of IVRF number. Interestingly, G1 presented an increase in the IVRF number to 70,59% in the 12 teeth out of 17 teeth studied. The statistical analysis showed that the mean of IVRF increased significantly in G1 when compared to G2 (p < 0.05). Conclusions: The application of a 1.5 kg spreader load during lateral compaction technique does not produce complete vertical root fractures, but may produce incomplete fractures or “other defects”.

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“…Both total-etch and self-etch adhesives techniques are found experimentally to reduce apical and coronal leakage as it seals intraradicular dentin just before the obturation of root canals with gutta-percha [16][17][18][19][20]. However, these techniques have limitation due to the lack of copolymerization between the methacrylate-based dentin adhesives, the epoxy resin or zinc oxide eugenol-based root canal sealer, and gutta-percha [21].…”

Section: Introductionmentioning

confidence: 99%

Comparative Evaluation of Fracture Resistance of Root Obturated with Resilon and Gutta-Percha Using Two Different Techniques: An in Vitro Study

Vl¹,

Desai

Azad³

2015

JCDR

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An in vitro study of spreader loads required tocause vertical root fracture during lateral condensation

Cited by 108 publications

References 5 publications

Root-originating dentinal defects: methodological aspects and clinical relevance

Root-originating dentinal defects: methodological aspects and clinical relevance

Incomplete vertical root fracture associated with lateral compaction technique: a microscopic analysis

Comparative Evaluation of Fracture Resistance of Root Obturated with Resilon and Gutta-Percha Using Two Different Techniques: An in Vitro Study

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