Effect of Surface Treatments and Surface Modifications to Improve the Bonding Characteristics of Orthodontic Adhesive for an Experimental Zirconia Ceramic Bracket

  • TANABE Satoru
    Department of Orthodontics, Showa University School of Dentistry
  • FUJISHIMA Akihiro
    Department of Oral Biomaterials and Technology, Showa University School of Dentistry
  • MANABE Atsufumi
    Department of Clinical Cariology, Showa University Dental Hospital Division of Aesthetic Dentistry, Showa University Dental Hospital
  • MIYAZAKI Takashi
    Department of Oral Biomaterials and Technology, Showa University School of Dentistry
  • MAKI Koutaro
    Department of Orthodontics, Showa University School of Dentistry

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Other Title
  • ジルコニアセラミックス製試作ブラケットに対する矯正用接着剤の接着性向上のための表面処理ならびに表面改質効果
  • ジルコニア セラミックスセイ シサク ブラケット ニ タイスル キョウセイヨウ セッチャクザイ ノ セッチャク セイコウ ジョウ ノ タメ ノ ヒョウメン ショリ ナラビニ ヒョウメン カイシツ コウカ

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Abstract

The aim of this study was to evaluate the effects of pre-treatments, that is, surface treatments and surface modifications on the bonding of an experimental bracket made from Y-TZP ceramics with orthodontic adhesives. The bracket surfaces were treated with three types of surface treatment (GRD, ASB, MDP) and two types of surface modification (TBC, SLP). Then, the bracket was bonded by three types of orthodontic adhesives (MMA, CMPT, and RMGIC) to bovine enamel. Next, the bonding speciment was stored in water at 37ºC for 24 h, or put through thermal cycling 5,000 times. Shear bond tests were performed to measure the bond strengths, and after testing, the area of remnant cement on the fractured surface was measured using image analysis. The shear bond strength of MDP and SLP were statistically significantly higher than that of GRD. The rate of the remnant cement for MDP and SLP for all adhesives indicated high values of 60 percent or over, and were significantly higher than that of GRD and ASB. We concluded that the MDP for surface treatment and SLP for surface modification were suitable pre-treatments to enhance the bonding characteristics of a zirconia ceramics bracket.

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