B light-curing unit
(Guilin Woodpecker, China) at a light intensity of 1100 mW/ cm2 with an irradiated diameter of 10 mm was used to photo-cure composite samples.
Following removal of excess material from the coronal root face, a light-curing unit
is applied to the end of the plastic post to transilluminate light along its entire length to polymerize the surrounding composite resin.
1,2) Even though the mechanical and optical properties of the ceramic materials are important, many variables may contribute to the predictability and clinical longevity of all-ceramic restorations, including the adhesive and luting system used, the curing mechanism, the light-curing unit
, and the microstructure and thickness of the ceramic.
For polymerization, a conventional quartz tungsten halogen light-curing unit
(XL 2500, 3M ESPE, USA) calibrated at 500 m W/ [cm.
Control Sani-Shield OPT 425 (25) (a,q) 393 (12) (a,b) DDT 477 (25) (c,p) 460 (30) (c,r) DGT 458 (38) (e,p,q) 442 (43) (e,r) ELI 377 (25) (g) 347 (40) (g,h) COL 300 (00) (k,l) 272 (20) (j,k,l,t) Light-Curing Unit
Protectop All-Purpose Adhesive Covering OPT 392 (14) (a,b,s) 375 (25) (b,u) DDT 423 (23) (d,s) 367 (32) (u) DGT 422 (46) (f,s) 443 (40) (e,f) ELI 317 (29) (h,l,t) 309 (14) (l) COL 292 (14) (j,k,l,t) 263 (23) (l) Light-Curing Unit
Prophy Wrap OPT 403 (6) (a,b,w) DDT 413 (15) (d,v,w) DGT 445 (30) (e,f,v) ELI 315 (71) (h,l,x) COL 317 (55) (j,x)
The interaction among the light-curing unit
, resin cement, and storage factors was statistically significant (p = 0.
Specimens were light cured according to the manufacturers' instructions (20 s with Filtek Supreme A2E/A2D/WE and Opallis A2E/ EBleach Low; or 40 s with Opallis A2D) with the light-curing unit
corresponding to each group.
1-3) In addition to the presence of photoiniators in their composition, self-curing components are added to ensure an optimal polymerization even when activating light is severely attenuated due to the presence of an indirect restoration interposed between LA and light-curing unit
The physical characteristics of the light-curing unit
used in the study are listed in Table 2.
These lights have different characteristics and advantages, but the optimal light-curing unit
for the photopolymerization of composites has not yet been determined.
Light curing was carried out with a conventional quartz tungsten halogen (QTH) light-curing unit
(LCU) (XL 2500, 3M ESPE, Saint Paul, MN, USA) for 40 s at 700 mW/[cm.
A study done by Kusai Baroudi and others compared the intrapulpal temperature rise between the five flowable and three non flowable composites using light-emitting diode (LED) and halogen (quartz-tungsten-halogen) light-curing units