Moazzami Fariborz, Sahebi Safoora, Shirzadi Sareh, Azadeh Niloufar
Dept. of Endodontic, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Dept. of Orthodontic, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
J Dent (Shiraz). 2021 Mar;22(1):48-52. doi: 10.30476/DENTJODS.2020.85057.1113.
Tooth color changes followed by treatment with bioceramic materials are always a matter of concern.
The aim of the present study was to compare tooth discoloration that occurs in human teeth filled with ProRoot WMTA (DENTSPLY Tulsa Dental Specialties, Tulsa, OK) and those filled with Nano Fast Cement (NFC) over the course of 3 months.
In this experimental study, Thirty human intact premolars were obtained. The roots of all teeth were removed by a horizontal cut about 2 mm below the cementoenamel junction. The pulp tissues were removed using a barbed broach (Mani, Tokyo, Japan).The teeth were randomly divided to 3 groups (n= 10) including the control (no material), ProRoot WMTA and NFC. The experimental materials were condensed into the crowns and the teeth ends were sealed with light-cure glass ionomer cement (GC Corporation, Tokyo, Japan). The color was assessed at T (baseline; after preparation of the cavities but before placement of the materials), T (immediately after placement of the filling material and provisional restoration), T (after 4weeks of storage), and T (after 12weeks) of storage.
The discoloration was evident in all teeth, immediately (T) after applying MTA and NFC. The highest ΔΕ was noted in WMTA at 12 weeks, followed by NFC; however, there was no significant difference between the discolorations induced by these two materials.
Similar levels of clinically observable tooth discoloration were detected by using either WMTA or NFC.
使用生物陶瓷材料治疗后牙齿颜色变化一直是令人担忧的问题。
本研究的目的是比较填充有ProRoot WMTA（登士柏 Tulsa 牙科专业公司，塔尔萨，俄克拉荷马州）的人类牙齿和填充有纳米快速水泥（NFC）的人类牙齿在3个月内出现的牙齿变色情况。
在这项实验研究中，获取了30颗完整的人类前磨牙。所有牙齿的根部在牙骨质釉质界下方约2mm处水平切割去除。使用倒刺拔髓针（日本东京马尼公司）去除牙髓组织。牙齿被随机分为3组（n = 10），包括对照组（无材料）、ProRoot WMTA组和NFC组。将实验材料填入牙冠，牙齿末端用光固化玻璃离子水门汀（日本东京GC公司）密封。在T（基线；制备洞型后但放置材料前）、T（放置填充材料和临时修复体后立即）、T（储存4周后）和T（储存12周后）评估颜色。
应用MTA和NFC后，所有牙齿立即（T）出现变色。12周时WMTA组的ΔΕ最高，其次是NFC组；然而，这两种材料引起的变色之间没有显著差异。
使用WMTA或NFC检测到的临床可观察到的牙齿变色水平相似。
