UNIVERSITY OF TURIN

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UNIVERSITY OF TURIN C.I.R. DENTAL SCHOOL LINGOTTO

Dean: Prof. Stefano Carossa Department of Endodontics and Operative Dentistry Dean: Prof. Elio Berutti

Sealing  performance  of  resin  composite  to  pulp  chamber  floor:  evalua7on  by  Op7cal  Coherence  Tomography       1 1 1 1,   2 1 1 Boaglio  Alessandro ,  Comba  Allegra ,  Coscio  Andrea ,  Alovisi  Mario Alovisi  Camilla ,  BeruC  Elio ,  ScoC  Nicola   1University  of  Turin,  Department  of  Surgical  Sciences,  Dental  School,  Italy.  2  University  of  Turin,  Department  of  Surgical  Sciences,  Clinica  Oculis?ca,  Italy  

OBJECTIVE:

Several   studies   showed   the   importance   of   the   coronal   restora7on   to   obtain   the   success   of   endodon7c   treatment.  To  date,  post-­‐endodon7c  restora7ons  are  mainly  performed  with  adhesive  techniques.  However,   gap   forma7on   and   marginal   microleakage   due   to   adhesive   bond   failure   is   s7ll   one   of   the   most   reported   problems,   which   could   be   due   to   different   factors:composite   shrinkage   stress,   mechanical   proper7es   of   restora7ve  materials,  C-­‐Factor,  composite  layering  technique,  irradia7on  technique.   The  aim  of  this  in  vitro  study  was  a  non-­‐invasive  evalua7on  of  the  composite  resin  adapta7on  to  cavity  floor  in   post-­‐endodon7c  restora7ons  using  the  op7cal  coherence  tomography  (OCT).  The  null  hypothesis  is  that  there   is  no  difference  in  sealing  performance  of  the  pulp  chamber  floor  between  resins  of  different  viscosity.    

GROUP 1 a 0.5 mm horizontal layer of flowable composite followed by anatomical stratification with traditional nano-filled composite

GROUP 2

GROUP 3

single layer of flowable bulk composite

anatomical stratification with traditional nano-filled composite

n=10

n=10

n=10

Sta7s7cal  analysis  showed  a  significant  beQer  adapta7on  of  flowable  composites  compared  to  the  tradi7onal   packable  nanohybrid  composites(p