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[Analysis of vertical root fracture with two different techniques of root canal preparation]
1DDS Dental Care in Shanghai, China. info@dds-dental.com
Purpose:
To investigate the relationship of vertical root fracture (VRF) after root canal treatment with two different technique of root canal shaping and provide clinical reference.
Methods:
1702 teeth treated with root canal treatment during recent 2 years. All teeth were divided into two groups according to different techniques of root canal shaping: 643 teeth were prepared with NiTi rotary preparation technique (NRPT) and 1059 teeth were prepared with stainless steel hand K-files preparation technique(SSPT). The clinical symptoms and signs, radiological findings were estimated. The data was analyzed by SPSS 11.5 software package.
Results:
There were 32 teeth with vertical root fracture, the VRF rate was 1.88%. The VRF rate in NRPT group was significantly higher than in SSPT group (P<0.01). The VRF rate with retreatment history in NRPT group was significantly higher than in SSPT group (P<0.01), but The VRF rate with post and core restoration in both NRPT and SSPT groups was not significantly different(P>0.05).
Conclusions:
NiTi rotary preparation technique (NRPT) was closely related with vertical root fracture (VRF). And the VRF risk would be even higher if the tooth underwent root canal retreatment case or a post-core was placed in the root canal.
