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Air turbine used in a dental handpiece Correlation between rotational speed and torque Correlation between rotational speed and turbine output power. The turbine is powered by compressed air between 35 and 61 pounds per square inch (~2,4 to 4,2 bar), [1] [2] which passes up the centre of the instrument and rotates a Pelton wheel in the head of the handpiece.
A Lentulo spiral. The notches at left allow it to fit into a slow-speed latch handpiece. A Lentulo spiral is a dental instrument used to properly distribute root canal sealer and cement evenly throughout the root canal system, as when performing endodontic therapy or a post and core cementation.
Miscellaneous endodontic instruments. From left: Lentulo spiral, reamer, K-file and H-file. Hand files can provide tactile sensation when cleaning or shaping root canals. This allows the dentist to feel changes in resistance or angulation, which can help determine curvature, calcification and/or changes in anatomy, in which two dimensional radiographs may not always identif
Separation of nickel titanium rotary files happens due to torsional failure, cyclic fatigue, or the combination of both in clinical practice. [2]Torsional failure – Torsional failure happens when the tip of a file is locked but its shank is being rotated either manually or by a handpiece to the point that exceeds the elastic limit of the alloy.
The process of preparation usually involves cutting the tooth with a rotary dental handpiece and dental burrs, a dental laser, or through air abrasion (or in the case of atraumatic restorative treatment, hand instruments), to make space for the planned restorative materials and to remove any dental decay or portions of the tooth that are ...
Endodontics (from Greek endo- 'inside' and odont- 'tooth') is the dental specialty concerned with the study and treatment of the dental pulp. [1] Overview.
Root canal treatment (also known as endodontic therapy, endodontic treatment, or root canal therapy) is a treatment sequence for the infected pulp of a tooth that is intended to result in the elimination of infection and the protection of the decontaminated tooth from future microbial invasion.
For instance, a latch type, or right angle bur, is only used in the slow-speed handpiece with contra-angle attachment. A long shank or shaft is only used in slow speed when the contra-angle is not in use, and finally, a friction grip bur, which is a small bur, is used only in the high-speed handpiece.
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