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題名 | 以應力分析咬合力量傳導探討不鏽鋼牙冠及環套對裂齒症之牙齒的保護功效--先期研究=Strain Analysis of Occlusal Force Distribution on Cracked Teeth Using Stainless Steel Bands or Crowns Restoration |
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作者 | 謝永祿; 黃恆立; 陳錦; | 書刊名 | 牙髓病科學雜誌 |
卷期 | 4:2 2013.12[民102.12] |
頁次 | 頁11-16 |
分類號 | 416.94 |
關鍵詞 | 裂齒症; 矯正不鏽鋼環套; 不鏽鋼牙冠; 應變規; Cracked tooth; Orthodontic band; Stainless steel crown; Strain gauge; |
語文 | 中文(Chinese) |
中文摘要 | 牙齒受到咬合力量傷害便有可能會發生裂齒症候。裂齒症的治療過程中需要一段長時間的 觀察以確認治療的方向。在觀察期內,一般會建議使用矯正用不鏽鋼環套保護裂齒,以避免後續 裂痕的延伸。本研究的目的是以量化量測的方式,分析裂齒在矯正不鏽鋼環套或不鏽鋼牙冠之保 護下,其裂痕周圍之受力(例如:應變)的差異。實驗方法是使用完整的小臼齒,以外力在牙冠咬 合面中央溝製造裂痕,再分別用不鏽鋼環套及不鏽鋼牙冠為保護,並以負荷施加儀給予180牛頓 之垂直力或側向力,並配合資料擷取系統—應變規模組的使用,監測兩者保護裝置之裂齒裂痕周 圍的應變量。實驗結果發現在垂直力與側向力的測試下,此兩種裝置皆可明顯降低裂痕周圍的應 變量。除此之外,在側向力的負荷下不鏽鋼牙冠之應變量降低的幅度比矯正不鏽鋼環套有更大變 化。據此推論不鏽鋼牙冠應該是較理想之裂齒症的保護裝置。 |
英文摘要 | Cracked teeth have been problematic for more than three decades because of its complexity. Recently, the cracked tooth is treated by stabilizing the cracked and preventing its expansion with circumferential fixation with orthodontic band device that reinforced occlusal protection during chewing and mastication. Many treatment options including occlusal adjustement and operative procedures are ineffective treatment for cracked tooth syndrome because they do not protect the cracked tooth from interocclusal pressure during chewing. Many studies in the past agreed that orthodontic banding and full coverage crown were best satisfied the treatment objectives. The purpose of this study is a pilot study to investigate the relationship of occlusal force distribution of cracked tooth treated with orthodontic banding, and stainless steel crown using strain gauge analysis by NI Compack Daq. A total of 6 extracted bicuspids were collected and stored in thymol solution. The samples were fractured with a chisel along the central groove after grooving with a No. 2 diamond bur. Orthodontic band and stainless steel crown were used to protect the fractured tooth specimens. The occlusal force was tested with the strain gauge and all the data were recorded for statistically analysis using student t test. The results show that under lateral loading the mean strain value was decreased to 77% of the value when using stainless crown, compared to 15% of the mean value when using orthodontic band. The result shows the full crown is better than the orthodontic band in protection of the cracked teeth. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。