Coelho Marcelo Santos, Rios Marcos de Azevêdo, Bueno Carlos Eduardo da Silveira
Department of Endodontics, São Leopoldo Mandic Dental Research Center, Campinas, SP, Brazil.
Department of Endodontics, State University of Feira de Santana, Feira de Santana, Brazil.
Open Dent J. 2018 Oct 25;12:864-872. doi: 10.2174/1745017901814010864. eCollection 2018.
This review aimed to evaluate clinical studies that assessed separated NiTi rotary and reciprocating instruments.
This review assessed clinical studies involving treatments performed by undergraduate students, graduate students, and endodontic specialists. This review evaluated studies using rotary instruments, reciprocating instruments, and hybrid techniques. The number of uses of the different NiTi rotary and reciprocating systems was also assessed.
The incidence of separation for rotary instruments ranged from 0% to 23%. Rotary instruments were used from 1 to 50 times depending on the instrument and tooth type. The lowest rate of incidence separation for rotary instruments was obtained by undergraduate students, using a hybrid technique. The separation incidence for reciprocating instruments ranged from 0% to 1.71%. Reciprocating instruments were mostly single-used; one study reported their use up to 3 times. Separation rate in reciprocating instruments was similar in single-use or in multiple uses 0.2%.
Separation of instruments has dropped recently and seems to be a minor problem in current Endodontics. Multiple uses of NiTi rotary instruments are a possibility without significantly increasing the risk of instrument separation. Single and multiple uses of NiTi reciprocating instruments are also associated with low incidence of separation. Attempting to remove separated instruments should be carefully evaluated.
本综述旨在评估评估镍钛旋转器械和往复器械的临床研究。
本综述评估了涉及本科生、研究生和牙髓病专家进行治疗的临床研究。本综述评估了使用旋转器械、往复器械和混合技术的研究。还评估了不同镍钛旋转和往复系统的使用次数。
旋转器械的分离发生率为0%至23%。根据器械和牙齿类型，旋转器械的使用次数为1至50次。本科生采用混合技术使用旋转器械时，分离发生率最低。往复器械的分离发生率为0%至1.71%。往复器械大多一次性使用；一项研究报告其使用次数可达3次。往复器械一次性使用或多次使用时的分离率相似，为0.2%。
器械分离情况近来有所下降，在当前牙髓病学中似乎是一个小问题。镍钛旋转器械多次使用是可行的，且不会显著增加器械分离风险。镍钛往复器械单次和多次使用时的分离发生率也较低。尝试取出分离的器械时应仔细评估。
