Friction between Archwire of Different Sizes, Cross Section, Alloy and Brackets Ligated with Different Brands of Low Friction Elastic Ligatures- An Invitro Study

Patil, Bhushan; Patil, Neeraj; Kerudi, Veerendra V; Chitko, Shrikant S; Maheshwari, Amit; Patil, Harshal; Pekhale, Nikhita; Tekale, Pawankumar Dnyandeo

doi:10.7860/jcdr/2016/16769.7534

Cited by 5 publications

(6 citation statements)

References 21 publications

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“…This can be explained on the basis of the absence of normal force pushing the wire into the slot, which results in minimum friction at the bracket-wire interface, and module shape, which only produces force in the middle of the bracket. 28 The results obtained in the present study show that the slide modules introduced by Leone Orthodontics reduce friction significantly at the archwire-bracket interface. This could be very useful in the retraction stage of the treatment when the clinician wants minimum friction and full engagement of archwire in the bracket slot, especially in the buccal segment.…”

Section: Discussionsupporting

confidence: 55%

“…As Patil et al 28 conclude that slide module creates much less static and dynamic friction than other modules because of the shape of this module is different and it cannot bind the wire mesiodistally to the brackets; it only holds the wire passively into the bracket. Hence, depending on the treatment, we can use the low-friction module, such as during en masse retraction, using friction mechanics, we can use the super slick module in the anterior segment to avoid the torque loss by incomplete sitting of archwire into the brackets, and we can also use the slide module in the posterior segment to reduce the static and dynamic friction during the sliding of wire, and our study supports this suggestion.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Comparison of Friction in Sliding Mechanics Using Different Ligation Methods on Ceramic Bracket with Metal Slot and Epoxy Resin-Coated Stainless Steel Esthetic Wire: An in Vitro Study

Desai

Gandhi

Patel

et al. 2019

J Indian Orthod Soc

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Introduction: The friction generated during orthodontic treatment seems of concern in terms of anchorage and treatment duration. Different ligation methods have been developed to reduce the friction as compared with regular elastic modules. This study aimed to evaluate and to compare static and kinetic friction generated in ceramic brackets with metal slot and epoxy resin-coated stainless steel esthetic wire by using different ligation materials in wet condition (artificial saliva). Materials and Methods: A total of 40 epoxy-coated stainless steel wires and metal slot ceramic brackets were divided into 4 groups of 10 each and ligated using 4 different methods as follows: (1) super slick elastic modules, (2) slide elastic modules, (3) Teflon-coated esthetic stainless steel wire, and (4) regular elastic modules. They were then immersed in artificial saliva for 1 hour before testing their static and kinetic friction using a universal testing machine. Results: The intergroup comparison showed statistically significant differences for static and kinetic friction among all the 4 groups, where group 2 (slide modules) showed the least static as well as kinetic friction as compared with the other 3 groups. Conclusions: (1) Slide modules produced the least amount of friction compared with all other methods of ligation when epoxy resin-coated stainless steel archwire was used in ceramic bracket with 0.22˝ metal slot in wet condition. (2) Super slick modules produced the least friction in comparison with regular elastomeric and Teflon-coated ligature groups but produced greater friction than slide modules. (3) Teflon-coated stainless steel ligature produced the highest friction; however, it was not statistically significant when compared with the conventional elastic ligature. (4) In all clinical situations during the retraction stage, a large amount of friction is created in the buccal segment; hence, it is advisable to use slide modules in the buccal segment to reduce static and kinetic friction.

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Section: Discussionsupporting

confidence: 55%

Section: Discussionmentioning

confidence: 99%

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Comparison of Friction in Sliding Mechanics Using Different Ligation Methods on Ceramic Bracket with Metal Slot and Epoxy Resin-Coated Stainless Steel Esthetic Wire: An in Vitro Study

Desai

Gandhi

Patel

et al. 2019

J Indian Orthod Soc

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“…Spread statistik (satu standar deviasi dari nilai rata-rata tertimbang mereka) 1,5% di bawah 1 eV dan di bawah 1% pada energi menengah. TCSs (127; 128) dibandingkan dengan eksperimental penampang elastis (129)(130)(131)(132) , ionisasi (133)(134)(135) dan vibrasi eksitasi (3; 136-139) (dihitung dalam pendekatan Born) pada Gambar. 4.…”

Section: Fraksi Energi Elektronunclassified

Nitrogen Triflorida (NF3) : Termodinamika dan Transpor Elektron NF3

Sari¹,

Zainul²

2019

Preprint

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Nitrogen trifluorida adalah gas termodinamika stabil, tidak berwarna, tidak berbahaya dan memiliki stabilitas rendah. NF 3 sedikit larut dalam air yaitu 0,021 g/100 ml tanpa mengalami reaksi kimia Riview ini bertujuan untuk menganalisis pengaruh sifat termodinamiaka dan besaran Kimia Fisika 3 terhadap pergerakan elektron. Metode yang digunakan dalam pembuatan riview ini adalah metode studi literatur dengan menggunakan endonote, komputasi dengan ChemOffice 15.0 dan perhitungan matematis pada sifat termokimia ΔfG˚ dan pada besaran viskositas, kecepatan hanyut, kecepatan difusi dan mobilitas ion. Untuk mengetahui beberapa besaran fisika senyawa ini, dihitung dengan menggunakan perhitungan matematis dengan rumus dan data dari jurnal yang sudah ada sebelumnya. Berdasarkan studi literatur didapatkan data bahwa gas NF3 memiliki sifat termokimia seperti, kapasitas kalor (C) 53,26 J/(mol·K), entropi molar standar (So) 260,3 J/(mol·K), entalpi pembentukan standar (ΔfHo) −31,4 kJ/mol, −109 kJ/mol dan energi bebas gibbs(ΔfG) −84,4 kJ/mol. Berdasarkan perhitungan secara sistematis didapat bahwa jika gas NF3 pada suhu 100 0C dan energi 150 kJ maka viskositasnya adalah 13,1480 sedangkan pada suhu 200 0C dan energi 150 kJ viskositas adalah 10,3683. Nilai mobolitas ion pada jarak 0,001 m dan 0,005 m berturut turut adalah 0,000025 dan 0,0000125. Nilai daya hanyut pada gaya gesek 1 N dan 3 N berturut turut adalah 7 s dan 5 serta nilai kecepatan difusi pada suhu 500C dan 1000C berurut turut adalah 100 m/s dan 200 m/s. Dan berdasarkan komputasi dengan menggunakan ChemOffice 15.0 diadapatkan data jari-jari molekul NF3, jari jari atom N dan jari jari atom F berturut turut adalah 137 pm , 1.820 dan 1.650. Dari komputasi ChemOffice 15.0 didapatkan bahwa energi optimasi dari senyawa NF3 untuk data iteration 5 dan 10 dengan, waktu, total energi, potensial energi dan suhu berturut-turut adalah 0.010; 0.037 ± 0.019; 0.016 ±0.012; 1.43 ± 0.90 dan 0.020; 0.089 ± 0.018; 0.043 ± 0.016; 3.07 ± 0.87. Keywords

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“…24 Por esse motivo, é mais apropriado usar o fio apenas uma vez em cada teste, como alguns autores realizaram É importante padronizar a força de ligação, porque o comportamento e a força exercidos por diferentes tipos de ligadura sofrem variações consideráveis. 5,[74][75][76][77] Mesmo que seja usado um mesmo tipo de ligadura para o teste de diferentes grupos amostrais, não há garantia de que a mesma força de ligação seja promovida, pois o mesmo material de ligadura (elásticos ou aço) pode produzir forças diferentes. [78][79][80] Assim, torna-se muito valioso usar um dispositivo para estabilizar a força de ligadura durante os testes de fricção, como relataram alguns estudos.…”

Section: Características Dos Ensaios In-vitrounclassified

Exposição dos bráquetes ao meio bucal durante o tratamento ortodôntico e seu impacto no atrito

Cury¹

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O objetivo desse trabalho foi avaliar as alterações nas ranhuras dos bráquetes após uso clínico e o seu impacto na alteração da força de atrito. Para isso foi realizada uma revisão sistemática da literatura, e um estudo prospectivo comparando os níveis de atrito antes e depois do uso clínico dos bráquetes, assim como comparando dois diferentes materiais para jateamento profilático. A revisão sistemática avaliou 7 artigos que cumpriram os devidos critérios de inclusão, a partir de busca eletrônica realizada em diversas bases de dados, sem limitações quanto a data e o idioma. Foram avaliados quanto a qualidade metodológica, e ao risco de viés de acordo com uma versão modificada do checklist de Donws and Black. 6 dos 7 artigos apresentaram resultados com aumento significativo da força de atrito após o bráquete ser submetido ao uso clínico. O segundo estudo do presente trabalho se trata de um estudo prospectivo in-vivo, ao qual 16 pacientes, submetidos a tratamento ortodôntico com bráquetes metálicos convencionais, compuseram 3 grupos de acordo com o protocolo de controle profilático realizado nos bráquetes de 2ºs pré-molares (Grupo 1-pacientes submetidos à profilaxia com jateamento à base de bicarbonato de sódio; Grupo 2-pacientes submetidos à profilaxia com jateamento à base de glicina; Grupo 3-pacientes não foram submetidos à profilaxia profissional) Os bráquetes foram posteriormente removidos da cavidade oral e submetidos a ensaios de força de atrito, além de análise qualitativo da rugosidade superficial por microscopia eletrônica de varredura. O grupo controle (GC) para comparação foi constituído por bráquetes novos não submetidos à exposição em cavidade bucal. O teste de ANOVA seguido pelo teste Tukey foram utilizados para avaliar as diferenças entre os 4 grupos (GC, G1, G2 e G3). Os grupos de bráquetes usados apresentaram aumento da força de atrito, porém apenas o grupo que não foi realizado jateamento profilático a cada consulta (G3), apresentou diferença estatisticamente significante em relação ao Grupo Controle. Não houve diferença estatisticamente significante também quando comparados os dois diferentes materiais utilizados para o jateamento profilático.

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Friction between Archwire of Different Sizes, Cross Section, Alloy and Brackets Ligated with Different Brands of Low Friction Elastic Ligatures- An Invitro Study

Cited by 5 publications

References 21 publications

Comparison of Friction in Sliding Mechanics Using Different Ligation Methods on Ceramic Bracket with Metal Slot and Epoxy Resin-Coated Stainless Steel Esthetic Wire: An in Vitro Study

Comparison of Friction in Sliding Mechanics Using Different Ligation Methods on Ceramic Bracket with Metal Slot and Epoxy Resin-Coated Stainless Steel Esthetic Wire: An in Vitro Study

Nitrogen Triflorida (NF3) : Termodinamika dan Transpor Elektron NF3

Exposição dos bráquetes ao meio bucal durante o tratamento ortodôntico e seu impacto no atrito

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