Load and strain during lateral condensation and vertical root fracture

Lertchirakarn, Veera; Palamara, Joseph E.A.; Messer, Harold H.

doi:10.1016/s0099-2399(99)80005-3

Cited by 142 publications

(198 citation statements)

References 18 publications

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“…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%

“…These fractures are difficult to diagnose and treat [4,6,[9][10][11]. In addition, they may start at the coronal portion of the tooth, at the root apex, or at any location within these structures [12,13].…”

Section: Biomechanical Preparationmentioning

confidence: 99%

“…Prognosis of VRF is unfavorable, and they often result in bone loss and periodontal defects [2,12,14,15]. Presently, there is still a limited amount of treatment in extraction of root or resection of fractured tooth [3][4][5]12,16].…”

Section: Biomechanical Preparationmentioning

confidence: 99%

“…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%

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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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“…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%

Section: Biomechanical Preparationmentioning

confidence: 99%

Section: Biomechanical Preparationmentioning

confidence: 99%

Section: Biomechanical Preparationmentioning

confidence: 99%

See 2 more Smart Citations

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

Chávez-Andrade¹

2013

BDS

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“…Endodontik tedavi esnasında uygulanan işlemlerin kök dentininde oluşturabileceği etkileri araştırmak için, dişler-in kırılma dirençlerinin ölçülmesi ve stres dağılımı gibi çeşitli yöntemler tanımlanmıştır. [38][39][40][41] Çalışmamızın metoduna benzer yapılan çalışmalarda da dışardan kuvvet verilerek, bu yük kök kırılana kadar devam edecek şekil-de uygulanır. 42 Çalışmamızda da dişlerin kırılma direnç değerleri kökler kırılana kadar vertikal kuvvet uygulanarak ölçüldü.…”

Section: 27unclassified

Effect of different rotary systems on fracture resistance of post-core reconstructed teeth

Görler¹,

Zan²,

Altunbaş³

et al. 2017

Yeditepe J Dent

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Percentage of gutta‐percha in mesial canals of mandibular molars obturated by lateral compaction or single cone techniques

Rodrigues

Bonetti-Filho

Faria

et al. 2012

Microscopy Res & Technique

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The aim of this study was to compare the percentage of gutta-percha (PGP) in mesial root canals of mandibular molars obturated with LC (Lateral Compaction) or SC (Single Cone) ProTaper Universal System techniques at different levels of the root. Mesial root canals of 20 human permanent molars with similar anatomical characteristics were instrumented using the ProTaper Universal rotary system technique until the F2 instrument, with 20 canals filled by SC ProTaper Universal technique and 20 canals by the LC technique. The mesial roots were sectioned transversely to 3, 5, and 7 mm from the root apex. Digital images of specimens were obtained at MIC-D digital microscope in increases of 30 to 35X. The gutta-percha area was measured using ImageTool software. Data were analyzed using two-way ANOVA and Bonferroni test (α = 0.05). The SC technique provided greater PGP than the LC technique in the apical third (3 mm) (P < 0.001). In the other thirds (5 and 7 mm) there was no statistical difference between the two techniques regarding the PGP (P > 0.05). There was no statistically significant difference between thirds of the root canal for both techniques (P > 0.05). It was concluded that SC technique provided greater PGP than the LC technique in the apical third of mesial root canals of mandibular molars. There was no difference between the two techniques regarding the PGP in the cervical and middle thirds.

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Load and strain during lateral condensation and vertical root fracture

Cited by 142 publications

References 18 publications

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

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

Effect of different rotary systems on fracture resistance of post-core reconstructed teeth

Percentage of gutta‐percha in mesial canals of mandibular molars obturated by lateral compaction or single cone techniques

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