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Do resin-based composite CAD/CAM blocks release monomers?

Abstract：

OBJECTIVE:The present study aimed to identify and quantify the elution of monomers of five different resin-based CAD/CAM blocks (RCBs) using HPLC. METHODS:Five different RCBs were used in the study: GC Cerasmart (CS), Voco Grandio blocs (GR), 3M Lava Ultimate (LU), Shofu Block (SB), and Vita Enamic (VE). Fifteen samples from each material were prepared using a low-speed precision diamond saw (ISOMET Buehler, Lake Bluff, IL, USA) at 5 × 5 × 4 mm size. After the preparation of samples, an extraction solution was mixed with %75/%25 ethanol/water. The samples were stored in the amber-colored bottles during three different immersed periods as 1 h, 24 h, and 90 days (n = 5). After immersion, 0.5 ml solutions were taken from each bottle and analyzed using HPLC. RESULTS:A total of 16.7 μg/ml of monomers from SB, 13.4 μg/ml of monomers from GR, 13.2 μg/ml of monomers from CS, and 6.7 μg/ml of monomers from LU were found after 3-m immersion. TEGDMA after 3-m of immersion was only released from the SB group, and also BisEMA was released from the CS group. Among the specimens immersed for 1 h, UDMA was released the least from the LU group and the most from the GR group (p < 0.05). Correspondingly, 24 h and 3 m after immersion, the highest release of monomers was found in the GR (p < 0.05). CONCLUSIONS:When the monomer release from RCBs was evaluated, it was shown that these materials released methacrylate-based monomers except VE, especially if they were kept in a solvent solution for a long time such as 3 m. CLINICAL SIGNIFICANCE:The novel resin-based CAD/CAM blocks might monomer release, which may cause cytotoxic effects. But, the detected amount of monomer release is below the estimated daily limit.

journal_name

Clin Oral Investig

journal_title

Clinical oral investigations

authors

Barutcigil K,Dündar A,Batmaz SG,Yıldırım K,Barutçugil Ç

doi

10.1007/s00784-020-03377-3

subject

Has Abstract

pub_date

2021-01-01 00:00:00

pages

329-336

issue

1

eissn

1432-6981

issn

1436-3771

pii

10.1007/s00784-020-03377-3

journal_volume

25

pub_type

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