crta
Hrvatska znanstvena Sekcija img
bibliografija
3 gif
 Naslovna
 O projektu
 FAQ
 Kontakt
4 gif
Pregledavanje radova
Jednostavno pretraživanje
Napredno pretraživanje
Skupni podaci
Upis novih radova
Upute
Ispravci prijavljenih radova
Ostale bibliografije
Slični projekti
 Bibliografske baze podataka

Pregled bibliografske jedinice broj: 850505

Časopis

Autori: Par, Matej; Marović, Danijela; Skenderović, Hrvoje; Gamulin, Ozren; Klarić, Eva; Tarle, Zrinka
Naslov: Light transmittance and polymerization kinetics of amorphous calcium phosphate composites
Izvornik: Clinical oral investigations (1432-6981) 21 (2017), 4; 1173-1182
Vrsta rada: članak
Ključne riječi: Polymerization kinetics ; Dental composites ; Remineralizing composites ; Light transmittance ; Amorphous calcium phosphate
Sažetak:
Objectives. This study investigated light transmittance and polymerization kinetics of experimental remineralizing composite materials based on amorphous calcium phosphate (ACP), reinforced with inert fillers. Materials and methods. Light-curable composites were comprised of Bis-EMA-TEGDMA-HEMA resin and ACP, barium glass and silica fillers. Additionally, a commercial composite Tetric EvoCeram was used as a reference. Light transmittance was recorded in real-time during curing and transmittance curves were used to assess polymerization kinetics. To obtain additional information on polymerization kinetics, temperature rise was monitored in real-time during curing and degree of conversion was measured immediately and 24 h post-cure. Results. Light transmittance values of 2 mm thick samples of uncured ACP-composites (2.3-2.9%) were significantly lower than those of the commercial composite (3.8%). The ACP-composites presented a considerable transmittance rise during curing, resulting in post-cure transmittance values similar to or higher than those of the commercial composite (5.5-7.9% vs. 5.4%). The initial part of light transmittance curves of experimental composites showed a linear rise that lasted for 7-20 s. Linear fitting was performed to obtain a function whose slope was assessed as a measure of polymerization rate. Comparison of transmittance and temperature curves showed that the linear transmittance rise lasted throughout the most part of the pre-vitrification period. Conclusions. The linear rise of light transmittance during curing has not been reported in previous studies and may indicate a unique kinetic behavior, characterized by a long period of nearly-constant polymerization rate. Clinical relevance. The observed kinetic behavior may result in slower development of polymerization shrinkage stress, but also inferior mechanical properties.
Projekt / tema: HRZZ 08/31
Izvorni jezik: ENG
Current Contents: DA
Citation Index: DA
Kategorija: Znanstveni
Znanstvena područja:
Kemija,Stomatologija
Tiskani medij: da
URL Internet adrese: https://link.springer.com/article/10.1007/s00784-016-1880-6
Broj citata:
Altmetric:
DOI: 10.1007/s00784-016-1880-6
Google Scholar: Light transmittance and polymerization kinetics of amorphous calcium phosphate composites
Upisao u CROSBI: Matej Par (mpar@inet.hr), 16. Pro. 2016. u 20:29 sati



  Verzija za printanje   za tiskati


upomoc
foot_4