PMID- 34459005
OWN - NLM
STAT- MEDLINE
DCOM- 20211122
LR  - 20211122
IS  - 1365-2591 (Electronic)
IS  - 0143-2885 (Linking)
VI  - 54
IP  - 12
DP  - 2021 Dec
TI  - The effects of endodontic access cavity design on dentine removal and 
      effectiveness of canal instrumentation in maxillary molars.
PG  - 2290-2299
LID - 10.1111/iej.13621 [doi]
AB  - AIM: To evaluate in a laboratory setting, the impact of three designs of 
      endodontic access cavities on dentine removal and effectiveness of canal 
      instrumentation in extracted maxillary first molars using micro-computed 
      tomography (micro-CT). METHODOLOGY: A total of 30 extracted intact maxillary 
      first molars were selected and scanned by micro-CT with a voxel size of 24 microm and 
      randomly distributed into three groups: the traditional endodontic cavity (TEC) 
      group, the conservative endodontic cavity (CEC) group and the guided endodontic 
      cavity (GEC) group. The pulp chambers of teeth in the groups were accessed 
      accordingly. After root canal preparation, the teeth were rescanned. The volume 
      of dentine removed after canal preparation, the noninstrumented canal areas, 
      canal transportation and centring ratio were analysed. Data were analysed 
      statistically using one-way analysis of variance. Tukey's post hoc test was used 
      for multiple comparisons. The significance level was set at p < .05. RESULTS: The 
      total volume of dentine removed was significantly greater in the TEC group after 
      root canal preparation (p < .05). No significant differences in the volume of 
      dentine removed occurred between the CEC and GEC groups (p > .05). The volume of 
      dentine removed in the crown, pericervical dentine and coronal third of the canal 
      was significantly lower in CEC and GEC groups when compared to that in the TEC 
      group (p < .05), no difference was observed in the middle third of the canal and 
      apical third of the canal amongst the three groups (p > .05). There was no 
      significant difference in noninstrumented canal area, canal transportation and 
      centring ratio amongst the TEC, CEC and GEC groups (p > .05). CONCLUSIONS: In 
      extracted maxillary molars tested in a laboratory setting, CEC and GEC preserved 
      more tooth tissue in the crown, pericervical dentine and coronal third of the 
      canal compared with TEC after root canal preparation. The design of the 
      endodontic access cavity did not impact on the effectiveness of canal 
      instrumentation in terms of noninstrumented canal area, canal transportation and 
      centring ratio.
CI  - (c) 2021 British Endodontic Society.
FAU - Wang, Dan
AU  - Wang D
AUID- ORCID: 0000-0002-2586-066X
AD  - Department of Endodontics, School of Stomatology, The Fourth Military Medical 
      University & State Key Laboratory of Military Stomatology & National Clinical 
      Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral 
      Diseases, Xi'an, China.
FAU - Wang, Wei
AU  - Wang W
AD  - Department of Endodontics, School of Stomatology, The Fourth Military Medical 
      University & State Key Laboratory of Military Stomatology & National Clinical 
      Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral 
      Diseases, Xi'an, China.
FAU - Li, Yu-Jiao
AU  - Li YJ
AD  - Department of Endodontics, School of Stomatology, The Fourth Military Medical 
      University & State Key Laboratory of Military Stomatology & National Clinical 
      Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral 
      Diseases, Xi'an, China.
FAU - Wang, Yi-Rong
AU  - Wang YR
AD  - Department of Endodontics, School of Stomatology, The Fourth Military Medical 
      University & State Key Laboratory of Military Stomatology & National Clinical 
      Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral 
      Diseases, Xi'an, China.
FAU - Hong, Tao
AU  - Hong T
AD  - Digital Dentistry Center, School of Stomatology, The Fourth Military Medical 
      University & State Key Laboratory of Military Stomatology & National Clinical 
      Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral 
      Diseases, Xi'an, China.
FAU - Bai, Shi-Zhu
AU  - Bai SZ
AD  - Digital Dentistry Center, School of Stomatology, The Fourth Military Medical 
      University & State Key Laboratory of Military Stomatology & National Clinical 
      Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral 
      Diseases, Xi'an, China.
FAU - Tian, Yu
AU  - Tian Y
AD  - Department of Endodontics, School of Stomatology, The Fourth Military Medical 
      University & State Key Laboratory of Military Stomatology & National Clinical 
      Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral 
      Diseases, Xi'an, China.
LA  - eng
GR  - 2019ZDLSF01-08/Science and Technology Projects of Shannxi Province/
GR  - 41742921209/Key Cultivation Projects of the New Technology and New Business 
      Stomatological Hospital of the Fourth Military Medical University in 2019/
GR  - LX2020-318/New Technology and New Business Stomatological Hospital of the Fourth 
      Military Medical University in 2020/
PT  - Journal Article
DEP - 20210916
PL  - England
TA  - Int Endod J
JT  - International endodontic journal
JID - 8004996
MH  - Dental Pulp Cavity/diagnostic imaging/surgery
MH  - Dentin
MH  - *Molar/diagnostic imaging/surgery
MH  - *Root Canal Preparation
MH  - X-Ray Microtomography
OTO - NOTNLM
OT  - contracted endodontic cavity
OT  - dentin removal
OT  - guided endodontic cavity
OT  - root canal preparation
EDAT- 2021/08/31 06:00
MHDA- 2021/11/23 06:00
CRDT- 2021/08/30 06:18
PHST- 2021/02/13 00:00 [received]
PHST- 2021/08/27 00:00 [accepted]
PHST- 2021/08/31 06:00 [pubmed]
PHST- 2021/11/23 06:00 [medline]
PHST- 2021/08/30 06:18 [entrez]
AID - 10.1111/iej.13621 [doi]
PST - ppublish
SO  - Int Endod J. 2021 Dec;54(12):2290-2299. doi: 10.1111/iej.13621. Epub 2021 Sep 16.