Deformasi Slot Beberapa Produk Braket Stainless Steel Akibat Gaya Torque Kawat Beta Titanium

https://doi.org/10.22146/majkedgiind.8340

Marisa Mifta Huda(1*), Erwin Siregar(2), Nada Ismah(3)

(1) Program Studi Ortodonti PPDGS Fakultas Kedokteran Gigi, Universitas Indonesia, Jakarta, Indonesia
(2) Bagian Ortodonti, Fakultas Kedokteran Gigi, Universitas Indonesia, Jakarta, Indonesia
(3) Bagian Ortodonti, Fakultas Kedokteran Gigi, Universitas Indonesia, Jakarta, Indonesia
(*) Corresponding Author

Abstract


Deformasi slot braket Stainless Steel akan mempengaruhi gaya yang diaplikasikan kepada gigi.Tujuan penelitian adalah untuk mengetahui deformasi slot braket dari lima merek braket yaitu 3M, Biom, Versadent, Ormco dan Shinye akibat gaya torque kawat Beta Titanium 0.021x0.025 inci dengan sudut puntir 45° dan besar gaya torque dengan sudut puntir 30° dan 45°. Penelitian juga bertujuan untuk membandingkan deformasi dan besar gaya torque antara kelima merek braket. Penelitian dilakukan pada 50 braket Stainless Steel Edgewise dari lima kelompok merek braket (n=10) dilem ke akrilik. Masing-masing braket dilakukan dua tahapan pengukuran yaitu pengukuran deformasi braket dengan menghitung rerata tinggi slot braket dengan mikroskop stereoskopi sebelum dan sesudah uji torque dan pengukuran besar gaya torque dengan alat uji torque. Hasil analisa statistik menunjukkan terdapat deformasi slot braket pada kelima merek braket dengan deformasi permanen secara klinis pada braket Biom (2,79 µm) dan Shinye (2,29 µm). Besar gaya torque pada kelima braket dari yang paling besar yaitu 3M, Ormco, Versadent, Shinye dan Biom. Perbandingan deformasi slot braket dan besar gaya torque antara kelima braket adalah terdapat perbedaan deformasi slot braket antara kelima merek braket kecuali antara 3M dan Ormco dan Biom dan Shinye dan terdapat perbedaan besar gaya torque antara kelima braket dengan sudut puntir 30° (kecuali 3M dan Ormco) dan 45°. Kesimpulan, Komposisi logam dan proses pembuatan braket merupakan faktor yang mempengaruhi terjadinya deformasi slot braket dan besar gaya torque. Proses pembuatan dengan metode MIM dan komposisi logam AISI 303 dan 17-4PH menurunkan risiko deformasi.

Slot Deformation in Various Stainless Steel Bracket Products due to The Torqueing Force of Beta Titanium Wire. Stainless Steel bracket slot deformation affects force applied to teeth. The research aims to determine slot deformation of five different bracket brands namely, 3M, Biom, Versadent, Ormco and Shinye due to torque of Beta Titanium wire 0.021 x 0.025 inch with torsional angle of 45° and the amount of torque with torsional angle of 30° and 45°. The research also attempts to compare the deformation and amount of torque among all five bracket brands. Fifity Stainless Steel Edgewise brackets from five bracket group brands (n=10) were attached on acrylic. Bracket slot measurement was carried out in two stages: firstly, deformation measurement by calculating average bracket slot height with stereoscopy microscope before and after application of torque; and secondly, measurement of torque with a torque measurement apparatus. Statistical analysis showed that there are slot deformations on the five bracket brands with clinical permanent deformation on Biom (2,79 µm) and Shinye (2,29 µm). The amount of torque on the five bracket brands from the highest is 3M, Ormco, Versadent, Shinye and Biom. From correlation assessment between bracket slot deformation and amount of torque in the five brands, a difference is found in the deformation in five brands except 3M, Ormco, Biom and Shinye. There is a difference in the amount of torque between the five brands with torsional angle of 30° (except 3M and Ormco) and 45°. It is concluded that metal compositions and manufacturing process are the factors that influence the occurrence of deformation bracket slot and the amount of torque. Manufacturing process using MIM and metal compositions of AISI 303 and 17-4 PH reduce the risk of deformation.


Keywords


bracket; slot deformation; torque; Stainless Steel; beta titanium.

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References

Proffit WR, Fields HW, Sarver DM. Contemporary orthodontics. 4rd ed. Mosby: St Louis; 2007. H. 602-616

Oh KT, Choo SU, Kim KM, Kim KN. A stainless steel bracket for orthodontic application. Eur J Orthod. 2005; 27: 237-244.

Flores DA, Choi LK, Caruso JM, Tomlinson JL, Scott GE, Jeiroudi MT. Deformation of metal brackets: a comparative study. Angle Orthod. 1994; 64(4): 283-290.

Lacoursiere RA, Nobes DS, Homeniuk DLN, Carey JP, Badawi H, Major PW. Measurement of orthodontic bracket tie wing elastic and plastic deformation by archwire torque expression utilizing an optical image correlation technique. J Dent Biomech. 2010; 1: 1-7.

Johnsons E. Relative stiffness of beta titanium archwire. Angle Orthod. 2003; 73(3): 259-269.

Kapur R, Sinha PK, Nanda RS. Comparison of load transmission and bracket deformation between titanium and stainless steel brackets. Am J Orthod Dentofacial Orthop. 1999; 116: 275-278.

Nishio C, Mendes AM, Almeida MA, Tanaka E, Tanne K, Elias CN. Evaluation of esthetic bracket’s resistance to torsional force from archwire. Am J Orthod Dentofacial Orthop. 2009; 135 : 42-48.

Major TW, Carey JP, Nobes DS, Heo G, Major P.Mechanical effects of third-order movement in self ligated bracket by the measurement torque expression. Am J Orthod Dentofacial Orthop. 2011; 139: e31-e44.

Szuhanek C, Fleser T, Glavan F. Mechanical behaviour of orthodontic tma wires. Wseas Transactions on Biology and Biomedicine. 2010; 3(7): 277-286

Mistakidis I, Gkantidis N, Topouzelis N. Review of properties and clinical application of orthodontic wires. Hell Orthod Rev. 2011; 14: 45-66.

Johnsons E. Relative stiffness of beta titanium archwire. Angle Orthod. 2003; 73(3): 259-269.

Eliades T. Orthodontic material research and applications: Part2. current status projected future development in materials and biocompatibility. Am J Orthod Dentofacial Orthop. 2007;131: 253-262.

Siargosa B, Bradleyb TG, Darabarac M, Papadimitrioud G, Zinelise S. Galvanic corrosion of metal injection molded (MIM) and conventional brackets with nickel-titanium and copper-nickel-titanium archwires. Angle Orthod. 2007; 77(2): 355-360.

Archambault A, Major TW, Carey JP, Heo G, Badawi H, Major PW. A comparison of torque expression between stainless steel, titanium molybdenum and copper nickel titanium wires in metallic self ligating brackets. Angle Orthod. 2010; 80(5): 884-889.

Huang Y, Keilig L, Rahimi A, Reimann S, Eliade T, Jager A, Bourauel C. Numeric modelling of torque capabilities of self ligating and conventional brackes. Am J Orthod Dentofacial Orthop. 2009; 136: 638-643.

Flores DA, Choi LK, Caruso JM, Tomlinson JL, Scott GE, Jeiroudi MT. Deformation of metal brackets: a comparative study. Angle Orthod. 1994; 64(4):283-290.

Gioka C, Eliades T. Material induced variation in the torque expression of preadjusted appliance. Am J Orthod Dentofacial Orthop. 2004; 125: 323-328



DOI: https://doi.org/10.22146/majkedgiind.8340

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