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The clinical case of a fractured tooth managed with root canal treatment, followed by post and core build-up using the RTD fiber post system.
include debonding (frequently related to inadequate adhesive and/or endodontics—managed by the appearance of new endomotors,
cementation procedures) and post fracture. The latter, when it occurs rotary and reciprocating file systems, thermal treatments, surface
in the middle or apical third, represents a non-repairable fracture and modifications, and variations in cross-section—has allowed the
is classified as a catastrophic failure, leading to the inevitable loss of standardization of root canal shaping. This advance generates spaces
the tooth [13,14] . with more predictable taper and diameter, which in turn favors the
Material selection requires clinical judgment, knowledge of subsequent adaptation of fiber posts .
[15]
adhesive techniques, and understanding of dental structural behavior. Moreover, thanks to this technological evolution, mechanized
After comprehensive treatment planning—including clinical- endodontics has been almost universally incorporated into clinical
radiographic diagnosis together with biological and structural practice, in beginners and experienced, currently employed by the vast
evaluation of the tooth—and once the indication for a fiber post has majority of practitioners in their endodontic treatments.
been established, it is pertinent to consider the different available In conclusion, clinical success in the rehabilitation of endodontically
alternatives. treated teeth depends on the integration of principles from restorative
dentistry, endodontics, and biomimetic dentistry, an approach that in
FIBER POST SYSTEMS international literature is referred to as the Endodontic-Restorative
Among them, RTD fiber posts stand out for their trajectory and design Process (Endo-Resto).
diversity, offering specific configurations adapted to different clinical
requirements: CLINICAL CASE
• Macrolock®: with helical grooves that increase adhesive and retentive After clinical, radiographic, biological, and structural diagnosis of the
surface. tooth, anesthesia and extended isolation of the operative field were
• Macrolock Oval®: with an oval cross-section in the middle and coronal performed. Persistent restorations and caries were removed, the root
portion, optimizing adaptation in non-circular canals (respecting the canal entrance was protected, and immediate pre-endodontic dentin
original anatomy of the canal). sealing (IPDS) was performed .
[16]
• DT Light Post®: with double taper, designed to reproduce the original Subsequently, working length was established, followed by
root anatomy. mechanized instrumentation in combination with irrigation and
• Matchpost®: with reduced diameter, indicated for highly conservative activation. Once cleaning and shaping were completed, tridimensional
approaches. endodontic obturation was performed using the continuous wave
technique (Downpack & Backfill Technique), leaving the space
ENDODONTIC AND RESTORATIVE PROCEDURES prepared for post placement, thus taking advantage of and respecting
Any tooth to be restored with a fiber post has previously undergone the initial mechanized preparation and the original canal anatomy .
[15]
endodontic treatment. Nowadays, the development of mechanized Resin Coating (RC) technique was performed to improve

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Dental Practice I January-February 2026 I Vol 22 No 1 57