Sains Malaysiana 50(8)(2021): 2433-2444

http://doi.org/10.17576/jsm-2021-5008-24

Physical Properties of Newly Developed Resin Modified Glass Ionomer Cement with Synthesised Coumarin Derivatives

(Sifat Fizikal Pembentukan Simen Ionomer Kaca Resin Terubahsuai Baharu bersama Sintesis Terbitan Kumarin)

FATIMAH SUHAILY ABDUL RAHMAN¹, DASMAWATI MOHAMAD¹*, HABSAH HASAN² & HASNAH OSMAN³

¹School of Dental Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan Darul Naim, Malaysia

²School of Medical Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan Darul Naim, Malaysia

³School of Chemical Sciences, Main Campus, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia

Received: 7 September 2020/Accepted: 7 December 2020

ABSTRACT

The aim of this study was to determine the effects of two types of coumarin derivatives, namely, 3-acetylcoumarin (AC) and coumarin thiosemicarbazone (CT) on surface characteristics such as the roughness, hardness, and morphology of resin-modified glass-ionomer cement (RMGIC). The release of coumarin from the fabricated RMGIC was also investigated. AC and CT at 1.0% (w/w) concentration were added into 0.3 g of RMGIC powder and mixed with 0.1 g of polyacrylic acid. The fabricated RMGIC-AC and RMGIC-CT were evaluated for surface characteristics such as roughness, hardness and topography. The coumarin release of AC and CT from RMGIC was also determined. The RMGIC-CT demonstrated a decreased roughness value among the materials. The surface roughness exhibited by the RMGIC was statistically higher (p < 0.05) than that of fabricated materials. The RMGIC-AC was observed to have the highest hardness value compared to the RMGIC-CT and RMGIC, and this value was significantly higher (p < 0.05). The surface morphologies of the RMGIC-AC and RMGIC-CT showed a number of pores and irregular surfaces. Meanwhile, the surface roughness value of the RMGIC was statistically higher (p < 0.05) than both RMGIC-AC and RMGIC-CT. In conclusion, the large-sized AC particles significantly increased the surface hardness of the fabricated RMGIC. Conversely, the particle size of both coumarins were not influenced the surface roughness value and the coumarin release profile of fabricated RMGICs. 

Keywords: Coumarin; glass ionomer cement; hardness; microstructure; roughness

ABSTRAK

Tujuan kajian ini dijalankan adalah untuk mengenal pasti kesan dua jenis terbitan kumarin, iaitu 3-asetilkumarin (AC) dan kumarin thiosemikarbazon (CT) ke atas pencirian permukaan simen ionomer kaca resin terubah suai (RMGIC) seperti sifat kekasaran, kekerasan dan morfologi.  Pembebasan kumarin daripada RMGIC difabrik turut dikaji. AC dan CT dengan kepekatan 1.0% (w/w) ditambah kepada 0.3 g serbuk RMGIC dan kemudiannya dicampurkan dengan 0.1 g asid poliakrilik. RMGIC-AC dan RMGIC-CT difabrik dinilai bagi pencirian permukaan seperti kekasaran, kekerasan dan topografi. Pembebasan kumarin AC dan CT daripada RMGIC juga dinilai. RMGIC-CT menunjukkan penurunan nilai kekasaran berbanding bahan-bahan yang lain. Kekasaran permukaan yang ditunjukkan RMGIC adalah tinggi secara statistik (p < 0.05) berbanding bahan-bahan difabrik. RMGIC-AC menunjukkan nilai kekerasan yang paling tinggi berbanding RMGIC-CT dan RMGIC, dan ia tinggi secara signifikan (p < 0.05). Morfologi permukaan pada RMGIC-AC dan RMGIC-CT memperlihatkan beberapa lompang dan permukaan tidak sekata. Sementara itu, nilai kekasaran pada RMGIC adalah tinggi secara statistik (p < 0.05) berbanding RMGIC-AC dan RMGIC-CT. Kesimpulannya, zarah bersaiz besar AC meningkatkan kekerasan secara statistik pada RMGIC difabrik. Sebaliknya, saiz zarah kedua-dua kumarin tidak mempengaruhi nilai kekasaran permukaan dan profil pembebasan kumarin pada RMGIC difabrik.

Kata kunci: Kekasaran; kekerasan; kumarin; mikrostruktur; simen ionomer kaca

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*Corresponding author; email: dasmawati@usm.my