Stress Variation in the Orthodontic Tipping Phenomenon Analysis through the finite element method

Sita, Dan Dragos; Brezeanu, Ligia; Bică, Cristina; Mănuc, Daniela; Bechir, Edwin Sever; Hack, M. D.; Păcurar, Mariana

doi:10.37358/rc.18.8.6460

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…Although not identical from a methodology point of view, other research studies had similar results, associating low frictional forces with uncoated archwires. A study conducted by Al-Ghroosh et al (2018) on round 0.018" NiTi archwires pointed out that uncoated wires produced smaller frictional forces than aesthetic archwires, but differences were not statistically significant [36,37].…”

Section: Experimental Part Materials and Methodsmentioning

confidence: 99%

Variation of Static Frictional Forces in the Fixed Orthodontic System

Dragomirescu¹,

Teodorescu²,

Ţărmure³

et al. 2019

Rev.Chim.

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Currently, the aesthetic appearance of fixed orthodontic appliances is an important factor for patients seeking orthodontic treatment. The aim of this study was to evaluate static frictional forces generated by different types of round 0.016 NiTi archwires, with and without aesthetic coating, when coupled with monocrystalline alumina brackets. The static frictional force was determined using a testing machine for measuring compression and tension forces. The results showed a variation of static frictional forces depending on the type of archwire used. Uncoated archwires have produced the lowest static frictional forces. Partially aesthetic coated archwires have generated lower static frictional forces than fully aesthetic coated ones. Fully aesthetic coated archwires have produced the highest static frictional forces, but no significant differences were noted between archwires with polymer and epoxy resin coating.

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Section: Experimental Part Materials and Methodsmentioning

confidence: 99%

Variation of Static Frictional Forces in the Fixed Orthodontic System

Dragomirescu¹,

Teodorescu²,

Ţărmure³

et al. 2019

Rev.Chim.

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“…This mechanics facilitates dental movement by gliding of the bracket along the orthodontic archwire. Controlled tipping or the rotation of the root only depends on the position of the bracket application on the tooth crown [3]. As this movement is subject to fundamental laws of mechanics, frictional force is present at the contact area of the orthodontic system components.…”

Section: Polycrystalline Aluminamentioning

confidence: 99%

In vitro Evaluation of Static Frictional Forces at the Bracket-archwire Interface

Dragomirescu¹,

Rizescu²,

Mihai³

et al. 2019

Rev. Chim.

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The aim of this research is to compare the static frictional forces generated by different bracket-archwire couples. The study group consisted of three types of ceramic brackets (polycrystalline alumina with stainless steel slot, polycrystalline alumina and monocrystalline alumina), one stainless steel bracket and two types of archwires (0.016` NiTi and 0.019x0.025` SS). Brackets corresponding to the upper right quadrant (form upper right central incisor to the upper right second premolar) were bonded on standardized maxillary models and elastomeric ligatures were used to secure the archwire to the bracket system. An in-vitro experiment was conducted using a testing machine designed to measure the compression and traction force, both in dry and wet testing conditions. The results indicated statistically significant differences between most bracket-archwire groups. According to the data obtained, stainless steel brackets produced the lowest static frictional forces, regardless of test conditions and orthodontic archwire type. Polycrystalline ceramic brackets with stainless steel slot generated higher static frictional forces than stainless steel brackets, but lower than ceramic brackets when combined with the 0.019`�0.025` SS archwire. No significant differences were found between polycrystalline and monocrystalline ceramic brackets. Experiments performed with 0.019�0.025` SS archwire produced greater static frictional forces than those with 0.016` NiTi wire. Static frictional forces were not significantly influenced by the test conditions.

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Stress Variation in the Orthodontic Tipping Phenomenon Analysis through the finite element method

Cited by 2 publications

References 8 publications

Variation of Static Frictional Forces in the Fixed Orthodontic System

Variation of Static Frictional Forces in the Fixed Orthodontic System

In vitro Evaluation of Static Frictional Forces at the Bracket-archwire Interface

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