The Influences of Implant Angulations in One and Two Directions on the Retentive Properties of Overdenture Attachments: An In Vitro Study
Identifieur interne : 002175 ( Main/Exploration ); précédent : 002174; suivant : 002176The Influences of Implant Angulations in One and Two Directions on the Retentive Properties of Overdenture Attachments: An In Vitro Study
Auteurs : Parsa Atashrazm [Iran] ; Mohammad Hossein Dashti [États-Unis] ; Leila Zamani Alavijeh [Iran] ; Samira Azarmaeh [Iran] ; Sayena Mahdizadeh [Iran]Source :
- The Journal of the Indian Prosthodontic Society [ 0972-4052 ] ; 2013.
Abstract
Implant alignment is an important factor in overdentures retained by solitary abutments. In this study, the effect of implant angulations in two directions, on the amount of retention of attachments was evaluated. Ninety models were divided into nine groups of two blocks each; one for two implants and one for two attachments. The implants were placed either parallel to, at 5°, or at 10° relative to the reference plane. The attachments were related to the implants with a 0, 5, or 10° angulations. The direction of the implant was either labial or distolabial. The initial and the subsequent retention values of each sample were measured after each 500 cycles of insertion and removal. The measurements were repeated for five consecutive 3,000 cycles, and the results were analyzed by means of one-way ANOVA and Tukey HSD tests. Group 9 with a 10° distolabial tilt of the implants and of their attachments showed the highest initial retention, whereas group 1 with a 0° angulations and parallel attachments showed the lowest (6.9 ± 0.28 and 3.88 ± 0.19 N, respectively). The initial retention and the final loss of retention was significantly higher in those groups with the distolabial tilt of the implants (
Url:
DOI: 10.1007/s13191-013-0272-8
PubMed: 24605001
PubMed Central: 3935040
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en"><p>Implant alignment is an important factor in overdentures retained by solitary abutments. In this study, the effect of implant angulations in two directions, on the amount of retention of attachments was evaluated. Ninety models were divided into nine groups of two blocks each; one for two implants and one for two attachments. The implants were placed either parallel to, at 5°, or at 10° relative to the reference plane. The attachments were related to the implants with a 0, 5, or 10° angulations. The direction of the implant was either labial or distolabial. The initial and the subsequent retention values of each sample were measured after each 500 cycles of insertion and removal. The measurements were repeated for five consecutive 3,000 cycles, and the results were analyzed by means of one-way ANOVA and Tukey HSD tests. Group 9 with a 10° distolabial tilt of the implants and of their attachments showed the highest initial retention, whereas group 1 with a 0° angulations and parallel attachments showed the lowest (6.9 ± 0.28 and 3.88 ± 0.19 N, respectively). The initial retention and the final loss of retention was significantly higher in those groups with the distolabial tilt of the implants (<italic>p</italic>
< 0.05). Within the limitations of this study, it was demonstrated that the more divergent the implants and their retentive components, the higher their initial retention and the lower their final retention may be.</p>
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