A three-dimensional finite-element stress analysis of an endodontically prepared maxillary central incisor

Ricks-Williamson, Linda J.; Fotos, Pete G.; Goel, Vijay K.; Spivey, James D.; Rivera, Eric M.; Khera, Satish C.

doi:10.1016/s0099-2399(06)80971-4

Cited by 55 publications

(57 citation statements)

References 21 publications

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“…Hence, to predict VRF it is only necessary to evaluate the state of stresses prior to fracture. Such studies were conducted for various root configurations and lateral condensation conditions using 3D Finite Element analyses (FEA) (Ricks-Williamson et al, 1995;Yaman et al, 1995;Telli et al, 1999). Latter works employing this concept studied the effect of the canal's cross-section shape and size, external root boundary and remaining dentin thickness (Lertchirakarn et al, 1999(Lertchirakarn et al, , 2003Sathorn et al, 2005a).…”

Section: Introductionmentioning

confidence: 99%

Fracture mechanics analysis of vertical root fracture from condensation of gutta-percha

Chai¹,

Tamse²

2012

Journal of Biomechanics

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Section: Introductionmentioning

confidence: 99%

Fracture mechanics analysis of vertical root fracture from condensation of gutta-percha

Chai¹,

Tamse²

2012

Journal of Biomechanics

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“…Previous studies have shown that the mean maximum spreader load applied during lateral compaction ranges from 1 to 3 kg [12,30]. We applied a standardized load of 1.5 kg to the spreaders during root canals obturation, which was in accordance with the study of Holcomb et al [23] where they suggested that 1.5 kg load to be regarded as a limit in clinical practice.…”

Section: Discussionmentioning

confidence: 69%

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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“…Von Mises's equivalent stress criterion (s vM ) was chosen because it represents the general combination of absolute values according to all the stress produced and acting as an excellent parameter for descriptive analysis of the obtained data (Ricks-Williamson et al 1995;Zarone et al 2006). The maximum s vM value was obtained, as well as for specific areas in each model (Figures 3 and 4).…”

Section: Computer Methods In Biomechanics and Biomedical Engineering 517mentioning

confidence: 99%

Mechanics of the maxillary central incisor. Influence of the periodontal ligament represented by beam elements

Júnior

Rocha

Santos

et al. 2010

Computer Methods in Biomechanics and Biomedical Engineering

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This study aimed to evaluate the influence of loading on a maxillary central incisor with the periodontal ligament (PDL) represented by 2D elastic beam elements using a 2D finite element analysis. Two models (M) were built varying the PDL representation: Mh (homogeneous PDL) and Mht (heterogeneous PDL with beam3 elements). Stress and displacements were determined for three loading conditions (L): Ll, lingual face loading at 45° with the tooth long axis; Li, perpendicular to the incisal edge; and Lip, on the incisal edge, parallel to the tooth long axis. Evaluation was performed on ANSYS software. Lip provided lower stress variation on the tooth and support structures when compared to Ll and Li. PDL's influence on stress values was lower for Lip. Oblique loading showed stress and displacement not observed in parallel loading condition through PDL's heterogeneous representation and it is probably incompatible with the in vivo condition.

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A three-dimensional finite-element stress analysis of an endodontically prepared maxillary central incisor

Cited by 55 publications

References 21 publications

Fracture mechanics analysis of vertical root fracture from condensation of gutta-percha

Fracture mechanics analysis of vertical root fracture from condensation of gutta-percha

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

Mechanics of the maxillary central incisor. Influence of the periodontal ligament represented by beam elements

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