Panzarini Sônia Regina, Sonoda Celso Koogi, Saito Célia Tomiko Matida Hamata, Hamanaka Elizane Ferreira, Poi Wilson Roberto
Department of Surgery and Integrated Clinics, School of Dentistry, Univ Estadual Paulista, Araçatuba, SP, Brazil.
School of Dentistry, Univ Estadual Paulista, Araçatuba, SP, Brazil.
Braz Oral Res. 2014;28:1-7. doi: 10.1590/1807-3107bor-2014.vol28.0059. Epub 2014 Oct 21.
MTA has been investigated as a root-end filling material. Its mechanism of action has some similarities to that of Ca(OH)2. The purpose of this study was to evaluate the repair process taking place in the delayed replantation of monkey teeth using calcium hydroxide and MTA as root canal filling materials. Five monkeys had their lateral incisors extracted and bench-dried for 60 minutes. After root canal preparation, the teeth were assigned to two groups according to root canal filling material: I, calcium hydroxide; and II, MTA. The same treatment sequence was followed for both groups: coronal seal, periodontal ligament removal, immersion of the tooth in 2% acidulated-phosphate sodium fluoride, irrigation of the socket with saline and replantation. Both groups exhibited replacement resorption, areas of ankylosis and absence of inflammatory root resorption. Statistically similar results (p > 0.05) were observed for both groups regarding replacement root resorption, but the groups differed significantly (p < 0.05) regarding the occurrence of ankylosis. MTA may be a viable clinical option for filling teeth submitted to delayed replantation, and is an acceptable option for treating replanted permanent teeth in order to prevent tooth resorption, particularly when dressing changes are not possible.
MTA已被作为一种根尖倒充填材料进行研究。其作用机制与氢氧化钙有一些相似之处。本研究的目的是评估使用氢氧化钙和MTA作为根管充填材料时，猴牙延迟再植后的修复过程。选取5只猴子，拔除其侧切牙并在台上干燥60分钟。根管预备后，根据根管充填材料将牙齿分为两组：I组，氢氧化钙；II组，MTA。两组遵循相同的治疗顺序：冠部封闭、去除牙周膜、将牙齿浸泡在2%的酸性磷酸氟化钠中、用盐水冲洗牙槽窝并再植。两组均出现替代性吸收、粘连区域且无炎性牙根吸收。两组在替代性牙根吸收方面观察到统计学上相似的结果（p>0.05），但在粘连的发生方面两组有显著差异（p<0.05）。MTA可能是延迟再植牙齿充填的一种可行的临床选择，并且是治疗再植恒牙以防止牙齿吸收的一种可接受的选择，特别是在无法更换敷料时。
