Naslov
Evaluation of clinical restorative procedures with different combinations of composites, adhesives and light sources

Autori
Tarle, Zrinka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, stručni

Izvornik
Dental Progress, Abstracts of Congress Lectures / - Prag, 2002

Skup
Dental Progress, Abstracts of Congress Lectures

Mjesto i datum
Prag, Češka Republika, 29.11.2002. - 30.11.2002

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
composite resins; dentine adhesives; light curing units

Sažetak
Despite the development of new bonding agents, none of the systems is currently able to consistently withstand the unavoidable polymerization contraction stress and formation of gaps at the dentin/restoration interface. Many researchers have put considerable efforts into evaluating new non-shrinking resins, or modified filler particles to overcome polymerization stress. However, such systems have not yet been incorporated into commercial composites. A thourough understanding of why restorations fail may assist in improving the quality of restorations. Clinical investigations have confirmed that the adhesive technique is able to provide acceptable performance in posterior teeth, in spite of the fact that these materials are very technique sensitive. Packable composites may be easier for clinicians to handle, but their physical properties have not proved superior to those of conventional small-particle hybrid resins. In our clinical study we evaluated clinical restorative procedures using different combinations of composites (Tetric Ceram, Tetric Ceram HB, Filtek Z 250, Filtek P 60, Tetric Flow and Filtek Flow), adhesives (Single Bond, Excite and Clearfil SE Bond) and light sources (Astralis 10, Elipar Trilight and Lux-o-max). The composite restorations were individually controlled in every patient. Fourteen days after the placement of restorations, eventual postoperative sensitivity to cold or hot stimuli or occlusal disturbances has been detected. All the restorations have been photographed and 216 teeth were evaluated after one year using the Ryge criteria of the US public health service untill November 2002. Even in the baseline some problems relating to marginal integrity, colour match and surface texture were detected (packable composites). After one year problems increased slightly, especially at the margins. Marginal discoloration (bravo) has been observed in 34 teeth treated with packable composites and in 5 teeth treated with hybrid composites. Hypersensitivity occured in 42 out of 216 teeth most often to cold stimuli, in cases when teeth were restored due to primary caries in deep cavities, when total etching technique, packable composites and halogen light sources were used. The purpose of our experimental study was to examine the polymerization effect in composite resin sample cured with different light sources by analysing the degree of conversion, temperature changes and polymerization shrinkage.

Izvorni jezik
Engleski

Znanstvena područja
Dentalna medicina

POVEZANOST RADA