Analysis of forces developed during obturations. Comparison of three gutta-percha techniques

Blum, Jean-Yves; Esber, Samir; Micallef, Jean‐Paul

doi:10.1016/s0099-2399(97)80420-7

Cited by 15 publications

(9 citation statements)

References 7 publications

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“…The test for film thickness outlined by British Standard BS 6934 (1988) involves using a 15‐kg weight, which far exceeds the forces applied clinically. The lower load used in this study (200 g) is more representative of the load applied to root‐canal walls during gutta‐percha compaction (Blum et al . 1997).…”

Section: Discussionmentioning

confidence: 99%

A comparative study of selected physical properties of five root‐canal sealers

et al. 2003

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Section: Discussionmentioning

confidence: 99%

A comparative study of selected physical properties of five root‐canal sealers

et al. 2003

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“…Using standard mechanical tests, similar to clinical conditions and with samples coupled to the load cell, it was possible in this study and former others to register the behavior of each professional, as in previous studies. 6,7,8 The use of an electronic monitoring device fitted with the mechanical testing machine, such as that developed in this study, in which the forces generated during the filling steps are recorded in real time and transformed into graphs is of great value for teaching and enhancement of endodontics. For this device was able to verify the pressure at the time of root canal filling, during insertion of the finger spreader in the lateral condensation and the plugger in the vertical condensation.…”

Section: Discussionmentioning

confidence: 99%

“…1,2,[6][7][8][9][10][11] Greater forces occur when lateral condensation obturation warm vertical compaction or thermomechanical compaction techniques are used, in comparison with the thermoplasticized condensation technique. 6,7 During lateral condensation, the use larger than # 25 spreaders caused a significant reduction on roots fracture resistance. 11 This is due to the fact that the insertion of the spreader during obturation can generate stresses within the root canal.…”

Section: Introductionmentioning

confidence: 99%

Analysis of forces developed during root canal filling by different operators

Sousa¹,

Alberto²,

Antonieta³

et al. 2011

Dental Press Endod.

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Objectives: Endodontic procedures might contribute to the development of vertical root fracture as well as other localized defects such as craze lines or incomplete cracks in root dentine. The objective of this study was to evaluate the maximum fracture resistance and the force produced by five different operators in lateral and vertical condensation during root canal filling. Methods: 74 human teeth, superior canines (SC) and inferior premolars (IPM) were selected. In order to determine the maximum fracture resistance during condensation, 24 teeth were submitted until failure to an axial compression load in a universal testing machine. Fifty teeth were used in order to measure the axial condensation force by means of a device developed to simulate clinical working conditions. Results: Fracture resistance mean values in kg were: SC = 14.96±2.65 and IPM = 7.56±1.05. Mean values of force applied by each of the five operator in Kg were, respectively: 2.49; 3.75; 2.24; 2.08 and 1.18. None of the operators achieved teeth's maximum fracture resistance during procedures. Conclusions: Different behaviors among five professionals monitored were observed for the same technique of root canal filling. The increase in strength during condensation had no radiographic improvement of root canal filling. During the root canal filling, lateral and especially vertical condensation, must be performed with reduced apical strength and pressure, avoiding excessive and unnecessary stress to root dentin.

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“…This range has been considered as safe and that would not produce vertical root fracture (Lindauer et al. 1989, Saw & Messer 1995, Blum et al. 1997a,b).…”

Section: Discussionmentioning

confidence: 99%