- 學位論文
比較ProTaper Ultimate與TruNatomy於微創髓腔開擴時之根管修形能力
Comparison of the shaping ability in minimally access cavity using ProTaper Ultimate and TruNatomy.
摘要
保守型髓腔開擴相較於傳統型髓腔開擴具有較多之冠部干擾，可能因此導致根管修形成效不彰。關於新型之鎳鈦旋轉器械是否可降低保守型髓腔開擴開口過小所帶來之影響，達到與在傳統型髓腔開擴時相似之修形結果，尚無明確定論。 本實驗選用兩款新型鎳鈦旋轉器械，搭配3D列印之牙齒樣本做根管修形，並記錄修形後之根管偏移量、根管置中能力與根管修形總耗費時數，並將結果與傳統型髓腔開擴比較，以驗證是否保守型髓腔開擴將顯著干擾修形成果。 實驗結果發現保守型髓腔開擴組相較於傳統髓腔開擴組，並未對鎳鈦器械修形能力，如根管位移程度、修形後之根管置中能力等造成統計學上之顯著影響（p > 0.05）。本實驗使用之兩款鎳鈦旋轉器械均能適應較小之微創髓腔開口，臨床醫師可根據自身習慣與需求挑選器材。保守型髓腔開擴進行根管修形將導致器械較難以進入根管開口，從而增加修形所耗費之時間。 此外，保守型髓腔開擴可能導致牙髓腔清潔困難，如何提升腔內之清潔效力，有待進一步研究。
並列摘要
Compared to traditional access cavities, the conservative type of access opening has more interference at the crown, which might lead to ineffective root canal shaping. Whether the new nickel-titanium rotary instruments can mitigate the effects of small openings in the conservative access cavities and achieve similar shaping results as in traditional access cavities is still inconclusive. In this experiment, two types of new nickel-titanium rotary instruments were used in combination with 3D printed tooth samples for root canal shaping. The value of canal transportation, canal central ability and the total time taken for shaping were recorded and compared with traditional access cavities groups to determine whether the conservative type significantly affects the shaping results. Experimental results found that, compared to the traditional access cavities groups, the conservative access cavities groups did not significantly affect the shaping capability of the nickel-titanium instruments (p > 0.05). Both nickel-titanium rotary instruments used in this experiment can adapt to minimally invasive access cavity. Clinicians can choose instruments according to their preferences and needs. Conservative access cavities make it harder for the instrument to enter the canal orifices, thereby increasing the time required for shaping. Furthermore, conservative access cavities might make it difficult to clean the pulp chamber. How to enhance the cleaning efficiency inside the chamber requires further research.