The mechanical strength of orthodontic elastomeric memory chains and plastic chains: An in vitro study

Kardach, Hubert; Biedziak, Barbara; Olszewska, Aneta; Golusińska-Kardach, Ewelina; Sokalski, Jerzy

doi:10.17219/acem/61957

Cited by 13 publications

(15 citation statements)

References 16 publications

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“…From table 1, the 25.07% force degradation after only one day can be observed, as well as the degradation rates of 45.24%, 59.65%, 62.53% respectively 65.41% for the time moments of day 7, 14,21 respectively 28. These results contradict the findings of Kardach et all and other authors [9,10,18].…”

Section: Resultscontrasting

confidence: 77%

“…Given these results, our in-vitro experiment contradicts most data in the orthodontic literature [7,11,12,[17][18][19][20][21][22], and only partially confirming the results generated by the study of Kardach et all [9,13].…”

Section: Resultssupporting

confidence: 65%

“…The thermoplastic elastomers are moldable at high temperatures and made of plastic. It has been demonstrated by in-vitro studies that they present more force loss and require less pre-stretching than the thermoset ones [8,9]. Thermoset chains are cured irreversibly during fabricating and present less force loss in vitro [10].…”

mentioning

confidence: 99%

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Mechanical Strength Variety of Orthodontic Polymeric Chains In vitro assessment and mathematical model

Bunta¹,

Mureşan²,

Păcurar³

et al. 2019

Mat.Plast.

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Elastomeric chains, as means of force delivery, are one of the most studied elements of the orthodontic field. Effects on tooth movement are closely related to force degradation degrees of these polymers. Unfortunately, due to varied manufacturing techniques and materials, different brands of elastomeric chains offer different initial force values and different force decay, with direct impact on tooth movement duration and effectiveness and quality of orthodontic treatments.

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Section: Resultscontrasting

confidence: 77%

Section: Resultssupporting

confidence: 65%

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Mechanical Strength Variety of Orthodontic Polymeric Chains In vitro assessment and mathematical model

Bunta¹,

Mureşan²,

Păcurar³

et al. 2019

Mat.Plast.

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“…Specifically, they are economic, easy to use and can be adjusted to the patient's needs, does not require patient's cooperation, good biocompatibility, able to reduce the risk of intraoral trauma and provide light, continuous, as well as powerful assistance in appropriate tooth movement. 3,8,9 However, the disadvantage is that the force produced is irreversible so it must be replaced after some time. 2,3 Deformation, force decay and relaxation behaviors of orthodontics elastomeric chain are also dependent on environmental factors like teeth movement, temperature changes, environmental pH, mouthwashes, salivary enzymes and mastication forces.…”

Section: Introductionmentioning

confidence: 99%

Effect of sodium fluoride in chlorhexidine mouthwashes on force decay and permanent deformation of orthodontic elastomeric chain

2021

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Introduction: Orthodontic elastomeric chain is polyurethane elastomer that is widely used among orthodontists due to its functions. Chlorhexidine (CHX) and sodium fluoride (NaF) are listed in mouthwash composition which could affect the mechanical properties of the elastomeric chain. This study was aimed to analyze the effect of sodium fluoride in chlorhexidine mouthwashes on force decay and permanent deformation of orthodontic elastomeric chains. Methods: This research is an experimental analytic laboratory with pretest-posttest control group design. 150 samples of orthodontic chains were divided into three groups. Group 1: artificial saliva (control group); Group 2: 0,1% chlorhexidine gluconate solution (CHX); Group 3: 0,1% chlorhexidine digluconate with sodium fluoride solution (CHX-NaF). The orthodontic elastomeric chain was stretched and maintained at a standardized distance equivalent to a force of 300 g. The measurement of force decay and permanent deformation were performed with digital force gauge and digital caliper (0.01mm) at intervals of the first, seventh, fourteenth, twenty-first, and twenty-eighth days, respectively. Results: The force decay and permanent deformation of the elastomeric chain compared between three groups (control, CHX mouthwash and CHX+NaF mouthwash) showed did not have any significantly different (p-value>0,05) at the first, seventh, fourteenth, twenty-first, and twenty-eighth days, respectively. Conclusion: Sodium fluoride in chlorhexidine mouthwash showing no significant difference among saliva, CHX mouthwash and CHX+NaF mouthwash on force decay and permanent deformation of elastomeric chain.

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“…The functional properties of polymeric materials, including mechanical properties and their experimental assessment have become an important area of research in the field of material engineering [1][2][3][4]. The growing interest is due to the increasing use of polymers in industrial production as well as medical devices [5][6][7][8][9]. Poly(methyl methacrylate) (PMMA) has been widely used in different fields of healthcare.…”

Section: Introductionmentioning

confidence: 99%

Bending Behaviour of Polymeric Materials Used on Biomechanics Orthodontic Appliances

et al. 2020

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This paper discusses the issues of strength and creep of polymeric materials used in orthodontic appliances. Orthodontic biomechanics is focused on the movement of individual teeth or dental groups as a result of the force applied by orthodontic appliances. Stresses in the construction of functional and biomechanical appliances is generated when using the apparatus in the oral cavity. The orthodontic appliance must maintain its shape and not be damaged during treatment so strength and creep resistance are fundamental properties. It was assumed that the clinical success of orthodontic appliances can be determined by these performance properties. The aim of the work was the experimental assessment of comparative bending strength and creep resistance of selected popular polymer materials used in the production of biomechanical orthodontic appliances. Four commercial materials manufactured by the world class producers were tested: NextDent Ortho Rigid (Vertex-Dental B.V., Soesterberg, The Netherlands) marked as “1A”; Erkocryl (ERKODENT Erich Kopp GmbH, Pfalzgrafenweiler, Germany)-“2A”; Vertex Orthoplast (Vertex Dental B.V.), blue, marked as “3A” and material with the same name as “3A” but orange, marked in the article as “4A”. All the tests were carried out after aging in artificial saliva for 48 h at a temperature of 37 °C. Flexular strength and flexular modulus were made using the three point bending method according to the ISO 178 technical standard. Creep tests were carried out according to the method contained in ISO 899-2. The creep test was carried out in an artificial saliva bath at 37 °C. The creep tests showed significant differences in the strength, modulus and deformability of the tested materials. The strength reliability of the tested materials also varied. The research shows that the 2A material can be used for orthodontic applications in which long-term stresses should be lower than 20 MPa.

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The mechanical strength of orthodontic elastomeric memory chains and plastic chains: An in vitro study

Abstract: Memory chains are more effective in orthodontic treatment due to diminished loss of mechanical and elastic capabilities, when compared to plastic chains.

Cited by 13 publications

References 16 publications

Mechanical Strength Variety of Orthodontic Polymeric Chains In vitro assessment and mathematical model

Mechanical Strength Variety of Orthodontic Polymeric Chains In vitro assessment and mathematical model

Effect of sodium fluoride in chlorhexidine mouthwashes on force decay and permanent deformation of orthodontic elastomeric chain

Bending Behaviour of Polymeric Materials Used on Biomechanics Orthodontic Appliances

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