In:
The Angle Orthodontist, The Angle Orthodontist (EH Angle Education & Research Foundation), Vol. 83, No. 4 ( 2013-07-01), p. 674-679
Abstract:
To determine if repeated sterilization has deleterious effects on the clinical stability of mini-screws. Materials and Methods: Thirty each of the following mini-screws were tested: Aarhus (American Orthodontics, Sheboygan, Wisc), VectorTAS (Ormco Corporation, Orange, Calif), Dual-Top (RMO, Denver, Colo), and Ortho Anchor (KLS Martin, Jacksonville, Fla). Controls were sterilized once using a steam autoclave (Statim 5000, SciCan USA, Canonsburg, Pa). Each group of mini-screws was divided into three groups: the control (n = 10) and two test groups (n = 10, each). Test groups were cycled five and 10 times respectively. All screws were inserted into custom-designed synthetic blocks that simulated mandibular bone. Maximum insertion torque and lateral displacement force data were recorded and subjected to statistical testing. Two-way analysis of variance (ANOVA) and three-way mixed ANOVA were used for statistical analyses for maximum insertion torque data and lateral displacement force data, respectively. Level of significance was established at P & lt; .05. Results: Insertion torque values displayed significant differences between both of the groups and sterilization cycles (P & lt; .05). Significant differences were observed between American Aarhus mini-screws and both RMO and KLS Martin mini-screws. Ormco Vector mini-screws also differed significantly from the KLS Martin mini-screws in this comparison (P & lt; .05). For lateral displacement, there was a significant main effect of groups, F(1,36) = 14.5 (P & lt; .05). Significant differences were observed between American Aarhus mini-screws and all three of the other groups (P & lt; .05). Conclusions: The examined groups displayed statistical differences of variable quality that may not affect their clinical stability.
Type of Medium:
Online Resource
ISSN:
0003-3219
,
1945-7103
DOI:
10.2319/082612-685.1
Language:
English
Publisher:
The Angle Orthodontist (EH Angle Education & Research Foundation)
Publication Date:
2013
detail.hit.zdb_id:
2026352-1
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