An Evaluation of Retentive Ability and Deformation of Acetal Resin and Cobalt-Chromium Clasps
Aim: To compare the retentive ability and deformation of Acetal resin with Cobalt-Chromium clasps via Insertion Removal apparatus after subjecting them to stimulate clinical use. Materials and Methods: Materials used for this study are commercially available Cobalt-Chromium alloy namely Wironit,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
JCDR Research and Publications Private Limited
2016-01-01
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| Series: | Journal of Clinical and Diagnostic Research |
| Subjects: | |
| Online Access: | https://jcdr.net/articles/PDF/7078/15476_CE[Ra]_F(Sh)_PF1(VSUAK)_PFA(AK)_PF2(PAG).pdf |
| Summary: | Aim: To compare the retentive ability and deformation of Acetal
resin with Cobalt-Chromium clasps via Insertion Removal
apparatus after subjecting them to stimulate clinical use.
Materials and Methods: Materials used for this study are
commercially available Cobalt-Chromium alloy namely Wironit,
Bego, Germany and Acetal resin namely Biodentaplast, Bredent,
Germany. The test samples were divided into two major groups
based on the type of materials used in the study. Each major
group is further subdivided into two sub groups based on the
retentive undercut depths used to engage the clasps. So a total
of 20 specimens were prepared, comprising of 5 specimens in
each sub group. Then the specimens were tested for retention
force and deformation.
Results: The results of this study indicate that acetal resin clasps
are resistant to deformation and may offer a clinical advantage
over the conventional metal clasps. The retentive force of acetal
resin clasps did not decrease over the cycling periods. This
would be attributed to the resilient nature of acetal resin. Under
the conditions of the present study cobalt chromium clasps
lost retentive force within 730 cycles of placement and removal
and continued to lose retentive force during the remaining test
period.
Conclusion: This invitro study demonstrated that retentive
force of cobalt chromium clasp is superior to that of Acetal
resin for removable partial dentures. As acetal resin clasps
exhibits greater flexibility and long term retentive resiliency, it
can be used for removable partial dentures where aesthetics or
periodontal health is a primary concern. |
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| ISSN: | 2249-782X 0973-709X |