Rosi Endah Pratiwi

Fakultas Kedokteran Gigi, Universitas Jember, Indonesia

Izzata Barid

Bagian Ilmu Kedokteran Gigi Dasar, Fakultas Kedokteran Gigi, Universitas Jember, Indonesia

Didin Erma Indahyani

Bagian Ilmu Kedokteran Gigi Dasar, Fakultas Kedokteran Gigi, Universitas Jember, Indonesia

DOI: https://doi.org/10.19184/stoma.v19i2.34743

ABSTRACT 

Alginate  impression  material is  a  material  that  is often  used  in  dentistry to  produce study  models.  The main active ingredient in the alginate impression material is sodium alginate, which can be obtained naturally from algae. Alginate from turbulent water (Waters on village Agel, Situbondo) and the structure of aliginate gluronic acid can form gel and influence the viscosity and the porosity of alginate impression material. Purpose was to analyze the viscosity and porosity of the alginate impression material from the red algae Kappaphycus alvarezii. This study is a laboratory experimental study with the research design of the post-test only control group design. This study consisted of 4 groups, namely  the  (1)  viscosity  control  group,  (2)  porosity  control,  (3)  viscosity  treatment,  and  (4)  porosity  treatment.  The porosity  measurement  results  showed  that  there  was no  significant  difference  and  the  viscosity  was  significantly different from the control group because of the type of algae, the surface area of the particles, the preparation stage, the extraction that affected sodium alginate. Kappaphycus alvarezii type red alginate impression material has lower porosity  than  the  standard  Hygedent  alginate  impression  material  with  a  mean  yield  of  9%.  The  viscosity  of  the Kappaphycus alvarezii red alginate impression material based on the sigma standard is classified as high viscosity with an average of 33,200 cP.