人類恆牙使用美白藥劑後對矯正用複合樹脂黏著強度之影響

The effect of orthodontic bonding strength in bleached human teeth

鄭翔宇(Hsiang-Yu Cheng)

指導教授 ： 蔡吉陽 ； 王蔚南

臺北醫學大學/口腔學院/牙醫學系碩博士班/碩士(2005年)

摘要

本研究將探討以鹵素光驅動35%之過氧化氫美白牙齒美白藥劑在不同條件下處理後的人類第三大臼齒，再使用複合樹脂將矯正托架黏著於牙釉質上的拉張黏著強度變化，並以掃描式電子顯微鏡及能量散佈光譜儀分析各斷裂介面之分佈情形。本研究使用75顆拔下之人類第三大臼齒並將其平均分為五組，分別為控制組美白一、二及三次與美白一次再浸泡於水中三週後再進行矯正托架黏著。抗張黏著強度測量結果分別為10.62、10.70、10.55、10.73及10.58 MPa，經由One-way ANOVA分析後發現各組間並無顯著差異存在。 結果顯示使用35%過氧化氫鹵素光驅動臨床美白藥劑美白後立即進行矯正托架黏著對抗張黏著強度而言並沒有顯著影響。美白處理後延遲三週再進行矯正托架黏著，與美白後立即黏著矯正托架比較，在黏著強度上並沒有顯著差異。而若因應病患需求而增加美白循環次數，只要在廠商建議的使用範圍之內，不會影響矯正托架的黏著強度。此外，美白處理對於拆除矯正托架時的斷裂介面分佈並沒有顯著的影響。

關鍵字

牙齒美白 ； 抗張黏著強度 ； 複合樹脂 ； 斷裂介面

並列摘要

The purpose of this study was to evaluate the effect of a 35% hydrogen peroxide (H2O2) agent on the tensile bond strength and the failure interface of metallic orthodontic brackets bonded to human enamel. 75 human third molars extracted from 20- to 35-year-old patients were randomly divided into five groups of 15 teeth each: untreated control, enamel treated with 35% H2O2 for 1, 2, or 3 cycles then water immersion for 24 hours, and treated with 35% H2O2 for 1 cycle then water immersion for 3 weeks. Following the treatment, a bracket was bonded to the enamel surface with composite resin and then debonded on a testing machine. The broken interface was recorded and analyzed with scanning electron microscopy and energy-dispersive x-ray spectrometry. The result of tensile bond strength were 10.62、10.70、10.55、10.73 and10.58 MPa for the five testing groups. The results indicated that the use of 35% H2O2 did not change significantly the tensile bond strength and the broken interface distribution of orthodontic brackets.

並列關鍵字

bond strength ； composite resin ； bleaching ； broken interface

參考文獻

Newman GV. Epoxy adhesives for orthodontic attachments. Progress report. Am J Orthod, 51: 901-912, 1965.

Sung EC, Chan SM, Mito R, Caputo AA. Effect of carbamide peroxide bleaching on the shear bond strength of composite to dental bonding agent enhanced enamel. J Prosthet Dent, 82: 595-599, 1999.

Tancan U, Basciftci FA, ???mez S, Sari Z, Buyukerkmen A. Can previously bleached teeth be bonded safely? Am J Orthod Dentofacial Orthop, 123: 628-632, 2003.

Miles PG, Pontier JP, Bahiraei D, Close J. The effect of carbamide peroxide bleach on the tensile bond strength of ceramic brackets: An in vitro study. Am J Orthod Dentofacial Orthop, 106: 371-375, 1994.

Cavalli V, Reis AF, Giannini M, Ambrosano GMB. The effect of elapsed time following bleaching on enamel bond strength of resin composite Oper Dent, 26: 597-602, 2001.