Root dentin strain and temperature rise during endodontic treatment and post rehabilitation.
This study investigated the effects of endodontic treatment procedures and different post systems rehabilitation steps on the strain and temperature rise on apical and cervical root dentin regions. Twenty-one extracted human canine teeth had two strain gages attached to the distal root surface and two thermocouples attached to the mesial root surface (cervical and apical). The strain and temperature rise were recorded during the following procedures: root canal preparation, final rinse and drying, root canal filling and canal relief. Then the teeth were divided into three groups (n=7), according to the type of post system: CPC, cast post and core; FGP, fiberglass post; and PSP, prefabricated steel post. Data continued to be recorded during the post space preparation, post modeling (only for CPC), post trying and post cementation. Data were subjected to a two-way ANOVA followed by Tukey's test (α=0.05). The post-space preparation caused the highest temperature rise (4.0-14.9 °C) and the highest strain in the apical region during irrespective of post type. The resin cement light-activation resulted in significant temperature increases in the cervical region for all of the groups. The canal relief and the post-space preparation produced highest temperature rises. The CPC post modeling resulted in higher root strain level similarly the level of post preparation. The PSP resulted in highest strain during post trying and post cementation.
Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlandia, UberlandiaMG, Brazil.
Euridsse Sulemane
ES
Amade
Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlandia, UberlandiaMG, Brazil.
Veridiana Resende
VR
Novais
Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlandia, UberlandiaMG, Brazil.
Marina Guimarães
MG
Roscoe
Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlandia, UberlandiaMG, Brazil.
Fabiane Maria Ferreira
FM
Azevedo
Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlandia, UberlandiaMG, Brazil.
Aline Aredes
AA
Bicalho
Department of Operative Dentistry and Dental Materials, School of Dentistry, UFU - Federal University of Uberlandia, UberlandiaMG, Brazil.
Carlos José
CJ
Soares
D001641:Bicuspid; D003799:Dental Stress Analysis; D003804:Dentin; D005898:Glass / Q000737:chemistry; D006358:Hot Temperature; D006801:Humans; D066298:In Vitro Techniques; D011176:Post and Core Technique; D019279:Resin Cements / Q000737:chemistry; D012387:Root Canal Filling Materials / Q000737:chemistry; D012390:Root Canal Therapy; D014092:Tooth Root
D019279:Resin Cements; D012387:Root Canal Filling Materials; C009753:fiberglass