Effects of two different treatments on enamel structure and bond strength of orthodontic brackets

doi:10.3969/j.issn.2095-4344.2015.38.004

Abstract

Abstract:

BACKGROUND: There are two ways to treat the enamel before bracket bonding: etching and sandblasting, but the few studies focus on the direct use of sandblasting technology on untreated enamel surface.

OBJECTIVE: To observe the damage of etching versus sandblasting to the enamel surface, and to compare the bonding strength of metal brackets adhesive to isolated teeth with these two kinds of surface treatments.

METHODS: (1) Nine premolar teeth removed for orthodontic treatment were randomized into three groups: sandblasting, acid etching and polishing treatment groups. Surface roughening effects of these three kinds of treatments were observed under scanning electron microscope. (1) Another 40 premolar teeth removed for orthodontic treatment were randomized into two groups: sandblasting and acid etching groups. At 24 hours after bracket bonding, the shear strength was detected using mechanical testing machine, and the adhesive residue index of tooth surface was statistically calculated.

RESULTS AND CONCLUSION: (1) Under the scanning electron microscope, polishing treatment had no damage to the enamel surface; but in the other two groups, the enamel surface was damaged to varying degrees, especially in the sandblasting group. (2) The bonding strength in the sandblasting group was significantly higher than that in the acid etching group (P < 0.05), but there was no difference in the adhesive residue index of tooth surface between the two groups (P > 0.05). These findings indicate that compared with the acid etching technology, the sandblasting technology can increase the bonding strength between the enamel and metal bracket, but it also results in more damage.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Key words: Acid Etching, Dental, Dental Cements, Orthodontics

CLC Number:

R318

Gao Yang, Zhang Ming, Gong Chun-mei. Effects of two different treatments on enamel structure and bond strength of orthodontic brackets [J]. Chinese Journal of Tissue Engineering Research, 2015, 19(38): 6087-6091.

Figures/Tables 2

References

[1] 谢晓华.环境湿度对正畸托槽粘接强度的影响的研究[D].福州:福建医科大学,2006.

[2] 董敏.正畸固定矫治中影响牙面颜色因素的体外研究[D].福州:福建医科大学,2012.

[3] Alawjali SS,Lui JL.Effect of one-step polishing system on the color stability of nanocomposites.J Dent.2013;41 Suppl 3: e53-61.

[4] 焦海涛.不同底板脱落金属托槽经喷砂处理在粘接的体外实验研究[D].青岛:青岛大学, 2004.

[5] 叶芳,廖小平,杨健,等.4种喷砂砂粒对牙釉质表面粗糙度影响的对比研究[J].口腔医学, 2009,29(7):340-341.

[6] Gardner A,Hobson R.Variations in acid-etch patterns with different acids and etch times.Am J Orthod Dentofacial Orthop, 2001,120(6):65-67.

[7] 赵婧.牙面处理方法对托槽二次粘接强度的影响[D].山东:山东大学,2011.

[8] Atsü S,Çatalba? B,Gelgör ?E.Effects of silica coating and silane surface conditioning on the bond strength of rebonded metal and ceramic brackets.J Appl Oral Sci. 2011;19(3): 233-239.

[9] Ahrari F,Basafa M,Fekrazad R,et al.The efficacy of Er,Cr:YSGG laser in recond-itioning of metallic orthodontic bracket.Photomed Laser Surg.2012;30(1):41.

[10] 石东晓,陈杰,刘珺.喷砂技术对牙釉质和正畸托槽间黏结强度的影响[J].广东牙病防止, 2007,15(4):155.

[11] Canay S,Kocadereli I,Ak"ca E.The effect of enamel air abrasion on the retention of bonded metallic orthodontic brackets.Am J Orthod Dentofacial Orthop. 2000;117(1):15-19.

[12] Hesse M,Magin TM,Weber K.Genes for intermediate filament proteins and the draft sequence of the human genome:novel keratin genes and a surprising high number of pseudogenes related to keratin genes 8 and 18.J Cell Sci.2001;114(14): 2569-2575.

[13] Espinar-Escalona E,Barrera-Mora JM,Llamas-Carreras JM,et al.Improvement in adhesion of the bracket to the tooth by sandblasting treatment.Mater sci Mater Med.2012;23: 605-611.

[14] Al Jabbari YS,Zinelis S,Eliades G.Effect of sandblasting conditions on alumina retention in representative dental alloys.Dent Mater J.2012;31(2):249-255.

[15] Robles-Ruíz JJ,Ciamponi AL,Medeiros IS,et al.Effect of lingual enamel sandblasting with aluminum oxide of different particle sizes in combination with phosphoric acid etching on indirect bonding of lingual brackets.Angle Orthod.2014;84(6): 1068-1073.

[16] 张旭.正畸托槽脱落后两种底板处理方法对比分析[J].中国医药指南,2012,10(10):170.

[17] Sen D,Poyrazoglu E,Tuncelli B,et al.Shear bond strength of resin luting cement to glass-infiltrated porous aluminum oxide cores.J Prosthet Dent. 2000;83(2):210-215.

[18] Coulombe PA,Omary MB.Hard and soft principles defining the structure,function and regulation of keratin intemediate filaments.Curr Opin Cell Biol.2002;14(1):110-122.

[19] Cal-Neto JP,Castro S,Moura PM,et al.Influence of enamel sandblasting prior to etching on shear bond strength of indirectly bonded lingual appliances.Angle Orthod.2011;81(1): 149.

[20] 叶芳,廖小平,胡友德.喷砂洁治对牙釉质影响的实验研究[J].实用中西医结合临床,2011,11(3):52.

[21] Türköz C,Ulusoy C.Evaluation of different enamel conditioning techniques for orthodontic bonding.Korean J Orthod.2012;42(1):32-38.