Sains Malaysiana 50(10)(2021): 3059-3065

http://doi.org/10.17576/jsm-2021-5010-18

The Digitalisation in Cobalt-Chromium Framework Fabrication. Surface Roughness Analysis: A Pilot Study

(Pendigitan dalam Fabrikasi Kerangka Kobalt-Kromium. Analisis Kekasaran Permukaan: Suatu Kajian Rintis)

AINI HAYATI ABDUL RAHIM^1,2*, ZUBAIDAH ZANUL ABIDIN² & NORSIAH YUNUS²

¹Faculty of Dentistry, Universiti Teknologi MARA (UiTM), 47000 Sungai Buloh, Selangor Darul Ehsan, Malaysia

²Faculty of Dentistry, University of Malaya (UM), 50603 Kuala Lumpur, Federal Territory, Malaysia

Diserahkan: 13 Mac 2020/Diterima: 10 Februari 2021

ABSTRACT

Selective laser melting (SLM) is a new technique in fabricating cobalt-chromium denture framework. However, the surface properties of cobalt-chromium denture framework fabricated using the aforementioned technique have not been widely investigated. The aim of this paper was to investigate the surface roughness of cobalt-chromium alloy in removable partial denture fabricated with SLM technique. Cobalt-chromium denture frameworks were fabricated with two techniques (n = 10); the conventional lost-wax casting (conventional group) and SLM techniques (SLM group). Specimens from the conventional group were subjected to the standard cobalt-chromium denture polishing protocols. No treatment was employed for specimens from the SLM group. All specimens were subjected to surface roughness measurement on polished and fitting surfaces using non-contact optical three-dimensional metrology and surface roughness analysis machine (Infinite Focus Real 3D Alicona). Statistical analysis showed no significant difference in surface roughness between the specimens from conventional and SLM groups (p > 0.05). There was no statistically significant difference in surface roughness between the polished and fitting surfaces of SLM specimens (p > 0.05). Surface roughness quality of the cobalt-chromium denture framework fabricated with the SLM technique is comparable to that fabricated with the conventional lost-wax casting technique. The surface roughness of SLM fabricated cobalt-chromium denture frameworks carries the same surface roughness quality between the polished and fitting surfaces.

Keywords: Cobalt chromium; denture; selective laser melting; surface roughness

ABSTRAK

Lebur laser terpilih (SLM) adalah teknik terkini yang digunakan dalam menghasilkan dentur kobalt-kromium. Walau bagaimanapun, masih kurang kajian yang dihasilkan berkaitan permukaaan dentur yang dihasilkan melalui teknik ini. Tujuan penyelidikan ini ialah untuk mengkaji kekasaran permukaan dentur yang dihasilkan melalui teknik SLM. Dentur kobalt-kromium dihasilkan menggunakan teknik konvensional dan teknik SLM (n = 10). Permukaan spesimen konvensional dirawat menggunakan protokol asas penggilapan dentur kobalt-kromium. Tiada rawatan dilakukan untuk spesimen daripada kumpulan SLM. Semua spesimen diimbas dengan mesin optikal pembacaan kekasaran permukaan (Infinite Focus Real 3D Alicona). Tiada perbezaan nyata statistik didapati antara spesimen konvensional dan SLM (p > 0.05). Tiada perbezaan nyata statistik antara permukaan licin dan permukaan adaptasi tisu untuk spesimen SLM (p > 0.05). Kualiti permukaan untuk dentur kobalt-kromium yang dihasilkan melalui proses SLM adalah sama dengan dentur yang dihasilkan melalui proses konvensional. Kualiti permukaan dentur kobalt-kromium yang dihasilkan melalui proses SLM adalah sama antara permukaan licin dan permukaan adaptasi tisu.

Kata kunci: Dentur; kekasaran permukaan; kobalt-kromium; lebur laser terpilih

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*Pengarang untuk surat-menyurat; email: hayati1967@uitm.edu.my