
Sorbera J.A. Determinación del nivel de ajuste en pernos intraradiculares metálicos, realizados por diferentes
metodologías
Revista Methodo: Investigación Aplicada a las Ciencias Biológicas. Universidad Católica de Córdoba.
Jacinto Ríos 571 Bº Gral. Paz. X5004FXS. Córdoba. Argentina. Tel.: (54) 351 4938000 Int.3219 / Correo:
[email protected]u.ar /
Web: methodo.ucc.edu
.ar |RESUMEN Rev.
Method
o 2026
;11(2
):20-
21.
Abstract
Fixed prosthetic restorations must meet a variety of requirements to be successful over time, including their
morphology, tissue biocompatibility, stability, support, aesthetics, and connection. However, one
requirement is crucial: retention. Without adequate retention, there is no permanence, and without
consistent permanence, the normal function of the various functional processes of the system will be
impaired. Currently, there is a significant debate among researchers between retention “per se”; (friction)
and retention by adhesion. We maintain that both must be present, as together they ensure the restorations
success for the planned duration.
OBJECTIVE: a) To establish the possible causes that influence the fit and retention of metallic posts. b) To
develop a new method for fabricating metallic posts that improves their fit.
MATERIALS AND METHODS: In this study, 20 metal posts were fabricated using the traditional indirect
method (for 20 of them), while the COPISMY method was used for the remaining 20. (This technique,
currently patented, was created by the author.) The latter is based specifically on pouring a refractory
material (investment, replacing the extra-hard plaster) over the dental impression, thus eliminating the
tedious task of creating the pattern for the intraradicular portion. Once this was done, the posts were placed
on root emulators with pressure control. They were then cut transversely to allow for microscopic
observation and measurement of the interface between the internal area of the root emulator and the external
extension of the post. A statistical analysis was then performed to determine whether any discrepancies
found were statistically significant.
RESULTS: Interface checks on the different samples showed an average misalignment of 97.07 μm for the
20 metal posts manufactured using the traditional technique. Analysis of interface measurements obtained
from posts manufactured using the author's method revealed average misalignments of 31.84 μm,
significantly lower compared to the standard technique. Subsequent comparisons of the values between the
two techniques showed statistically significant differences in all cases.
CONCLUSIONS: Based on this study and the results obtained, the author's method demonstrates that it
should be considered a technique for the future, or at least an interesting alternative, not only because of
the results obtained but also because of its ease of implementation.
Keywords: Prosthodontics, Posts, Fitting.
Bibliografía
1.Alejandra Garduño Guevara, * René Jiménez Castillo, § Vicente González Cardín,II Alejandro Benavides
Ríos. Alternativas en la fijación, retención y estabilidad de las prótesis bucales y craneofaciales. Revista
Odontológica mexicana. Vol. 13, Núm. 1 marzo 2009 pp 24-30.
2. Heydecke G, Butz F, Hussein A, Strub JR. Fracture strength after dynamic loading of endodontically
treated teeth restored with different post and core systems. J Prosthet Dent 2002:87(4):438-45 22. Torabi
K, Fattahi F. Fracture resistance of endodontically treated teeth restored by different.
3. Imanishi, A, Nakamura, T, Ohyama, T, Nakamura, T. 3- D Finite element analysis of all-ceramic
posterior crowns. Journal of Oral Rehabilitation. 2003; 30 (8): 18-22.
4. Torabi K, Fattahi F. Fracture resistance of endodontically treated teeth restored by different FRC posts:
anin vitro study. Indian J Dent Res 2009;20(3):282-7.