Cutting pattern of Flexogate instruments in plastic blocks

Abstract

Design modifications of endodontic instruments have been made to improve instrumentation in curved root canals. A new instrument, the Flexogate (Maillefer), has been introduced to overcome some of the problems associated with preparation of the apical part of the root canal. The purpose of this study was to investigate the cutting pattern of Flexogates in curved canals (45 degrees) in clear plastic blocks, prepared by four different operators. Image analysis was used to take accurate measurements of canal shape before and after instrumentation to calculate cutting patterns. The results showed that Flexogates did not remain centred in the canal of a plastic block during cutting; maximum transportation occurred in the apical third of the outer curve, with little or none in the middle and coronal thirds. The clinical implications of this study require further investigation of the effect of coronal preflaring, and experimentation in teeth.

Cutting pattern of nickel‐titanium files using two preparation techniques

“…Baumganner et al (23) used a histomorphometric computerized technique but only measured the entire area of the canal. However, in this study, the amount of material removed from fixed points along the canal was rneasured in microns by an accurate computerized imaging system (15). Statistical analysis highlighted the differences between files or techniques at each position of the canal.…”

“…One hundred plastic blocks were constructed using a modification of existing methods (14,15). A special former was constructed to produce standardized 40" curvatures of size 20 silver points (Produits Dentaires, Vevey, Switzerland), which were annealed.…”

“…The curve of the silver point was kept parallel to the plane of the sides of the cuvettes, to ensure that the apparent curve would not be different from the real curve. The silver cones were stabilized with brass tops (15).…”

New Multipurpose Endodontic Device Developed in Germany for Use in Predoctoral and Continuing Dental Education and Science

“…For this reason, several practice models have been designed. Simulated root canals in transparent epoxy resin blocks, [1][2][3][4][5][6][7][8][26][27][28][29][30] in artiicial dentin material, 31 or in artificial teeth produced individually 10,32 that allow students or endodontists to simulate shaping, cleaning, and illing of root canals have been described. Despite all advantages and possibilities of the use of acryl blocks with root canal equivalents or artiicial teeth, the hardness and abrasive characteristics of resin material and dentin are not comparable.…”

“…It is a prerequisite for every clinical root canal treatment that the dentist fully masters the materials used and their related methods. In predoctoral endodontic education, in continuing education courses, and in the context of scientiic examinations, endodontic treatments are carried out on simulated root canals in resin blocks, [1][2][3][4][5][6][7][8] on artiicial teeth manufactured individually, [9][10][11][12] and on extracted human teeth. [13][14][15][16] For the fastening of extracted teeth, various do-it-yourself methods are being used.…”