<![CDATA[Pendahuluan: Resin akrilik polimerisasi panas adalah bahan basis gigi tiruan yang memiliki kekurangan yaitu porositas dan menyerap air sehingga stabilitas dimensi terganggu. Selain itu, penggunaan desinfektan pada gigi tiruan diperlukan dalam perawatan karena gigi tiruan sering mengalami porositas dan menyerap air. Bahan alternatif yang dapat digunakan adalah ekstrak daun sungkai karena mengandung tanin dan flavonoid. Tujuan penelitian untuk menganalisis perbedaan efek perendaman basis gigi tiruan resin akrilik polimerisasi panas setelah direndam dalam ekstrak daun sungkai 30, 35, dan 40% terhadap porositas dan stabilitas dimensi. Metode: Rancangan penelitian adalah eksperimental laboratoris dengan 40 sampel berukuran 65x10x2,5mm. Sampel dibagi menjadi kelompok kontrol dan kelompok ekstrak daun sungkai 30, 35, dan 40%, yang direndam 2 hari 12 jam 50 menit. Hasil perhitungan dianalisis menggunakan uji Anava satu jalur dan Least Significant Difference. Hasil: Rerata porositas basis gigi tiruan resin akrilik polimerisasi panas setelah direndam dalam kelompok kontrol dan ekstrak daun sungkai 30, 35, dan 40% adalah 0,3249±0,0223%; 0,4767±0,05358%; 0,6222±0,0358%; 0,7830±0,0432, sedangkan rerata stabilitas dimensi adalah 0,1002±0,0205; 0,3748±0,0181 mg/cm2; 0,5213±0,0379 mg/cm2; 0,6736±0,0398 mg/cm2. Hasil uji Anava satu jalur diperoleh nilai signifikansi p=0,0001 (p<0,05) menunjukkan pengaruh setelah direndam dalam ekstrak daun sungkai 30, 35, dan 40% berefek terhadap porositas dan stabilitas dimensi, didukung hasil uji LSD menunjukkan perbedaan bermakna yang signifikan karena nilai p<0,05. Simpulan: Terdapat perbedaan efek perendaman ekstrak daun sungkai terhadap peningkatan porositas dan penurunan stabilitas dimensi terutama pada konsentrasi 30% karena menunjukkan nilai lebih kecil daripada 35% dan 40% dibandingkan kelompok kontrol. The effect of immersion of heat cured acrylic resin denture base in sungkai leaf extract (peronema canescens Jack) towards porosity and dimensional stability: a laboratory experimental studyIntroduction: Heat cured acrylic resin is one of the commonly used denture base materials; however, it has disadvantages such as porosity and water absorption, which may affect its dimensional stability. The use of denture disinfectants is necessary during treatment. An alternative disinfectant that can be used is sungkai leaf extract, as it contains tannins and flavonoids. The aim of this study was to analyze the differences in effect of immersing heat-cured acrylic resin denture bases in sungkai leaf extract at concentrations of 30%, 35%, and 40% on denture porosity and dimensional stability. Methods: The design of this study was laboratory experimental with 40 samples, each measuring 65x10x2.5 mm. The samples were divided into four groups: a control group and three groups immersed in sungkai leaf extract at concentrations of 30%, 35%, and 40%. The immersion period lasted for 2 days 12 hours 50 minutes. Data were analyzed using a one-way ANOVA and Least Significant Difference (LSD) tests. Results: The mean porosity of the heat-cured acrylic resin denture base after immersion in sungkai leaf extract at 30%, 35%, and 40% concentrations were 0.4767±0.05358%; 0.6222±0.0358%; 0.7830±0.0432%. Similarly, the mean dimensional stability of the denture base after immersion in sungkai leaf extract at the same concentrations were 0.3748 ± 0.0181 mg/cm2; 0.5213±0.0379 mg/cm2; 0.6736±0.0398 mg/cm2, respectively. The one-way ANOVA test yielded a significance value of p=0.0001 (p<0.05), indicating that immersion in sungkai leaf extract at these concentrations significantly affected the porosity and dimensional stability of the heat-cured acrylic resin denture base. Conclusion: There was a significant difference in the effect of sungkai leaf extract immersion on increased porosity and decreased dimensional stability. The concentration of 30% showed lower changes compared to 35% and 40%, and the control group. ]]>
