Lateral condensation stress in root canals

Harvey, Thomas; White, James T.; Leeb, I. Joel

doi:10.1016/s0099-2399(81)80228-2

Cited by 79 publications

(61 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This result is in accordance with previous studies which have suggested lateral compaction technique as a possible causal factor for VRF [12][13][14]25,28,29].…”

Section: Discussionsupporting

confidence: 93%

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

Chávez-Andrade¹

2013

BDS

View full text Add to dashboard Cite

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”.

show abstract

“…This result is in accordance with previous studies which have suggested lateral compaction technique as a possible causal factor for VRF [12][13][14]25,28,29].…”

Section: Discussionsupporting

confidence: 93%

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

Chávez-Andrade¹

2013

BDS

View full text Add to dashboard Cite

show abstract

“…Although the mean value of VRF force F well exceeded the 15-30 N figure generally quoted for clinical situations (Harvey et al, 1981), they found that a spreader load as small as 15 N produced VRF, and 13% of the samples fractured at loads smaller than 35 N. Additionally, partial fracture or dentinal cracks may occur during root canal preparation (Onnink et al, 1994;Shemesh et al, 2009). Such tend to accommodate foreign objects and bacteria (Walton et al, 1984), which may be of a long-term concern.…”

Section: Introductionmentioning

confidence: 86%

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

Chai¹,

Tamse²

2012

Journal of Biomechanics

View full text Add to dashboard Cite

“…Fractures produced by spreaders have been demonstrated from 1.5 kg to 7.2 kg (14, 15). Clinically useful forces have been shown to be between 1.0 and 3.0 kg (16,17).With the advent of greater taper files, gutta-percha cones of greater taper have been made to better fit the taper of the preparation. Linear resistance in the apical area prevents apical displacement of the filling material.…”

mentioning

confidence: 99%

“…Fractures produced by spreaders have been demonstrated from 1.5 kg to 7.2 kg (14,15). Clinically useful forces have been shown to be between 1.0 and 3.0 kg (16,17).…”

mentioning

confidence: 99%