Dental health problems in Indonesia continue to increase, while limited public access to dental professionals often delays the initial consultation process. This condition highlights the need for a system that can provide the public with fast and accessible preliminary information regarding possible dental diseases. This research aims to design and develop a web-based expert system for diagnosing dental diseases using the Certainty Factor (CF) method as an initial decision-support tool for patients at UPTD Puskesmas Kota Binjai. The system was developed using the Waterfall methodology, which consists of data collection, requirements analysis, system design, implementation, testing, and evaluation. The knowledge base was obtained through interviews with a professional dentist and supported by relevant literature studies. The system processes 25 symptoms to diagnose five types of dental diseases: dental caries, pulpitis, gingivitis, periodontitis, and dental abscess, by applying rule-based reasoning and expert-validated Certainty Factor weights. The results of this study indicate that the expert system was successfully implemented as a web application capable of calculating the confidence level of a diagnosis based on the symptoms selected by users. The system displays the Certainty Factor percentage along with recommendations for initial treatment. It enables patients to obtain preliminary diagnoses more quickly, facilitates independent consultations, and serves as a decision-support tool before undergoing a direct examination by a dentist.
References
Aflinda Yenti. (2017). Perbedaan Kualitas Hidup Masyarakat Yang Menderita Karies Gigi, Gingivitis Dan Periodontitis Di Wilayah Kerja Puskesmas Air Tabit Kecamatan Payakumbuh Timur. MENARA Ilmu, 11(74), 13–19.
Alfarizki pratama, A., Muhammad Ghufron, I., Ma’ruf, J., Hanafi, S., Hafidh Anas, A., & Susanti, S. (2021). Sistem Pakar Pendiagnosa Penyakit Gigi Pada Anak SDN 3 Koto Alam Menggunakan Metode Certainty Factor. Jurnal TIMES, 10(1), 12–15. https://doi.org/10.51351/jtm.10.1.2021643
Andika, D. K. R., & Wulandari, I. R. (2024). Implementasi Metode Forward Chaining Dan Certainty Factor Pada Sistem Pakar Penyakit Ikan Cupang. Journal of Information System Management (JOISM), 5(2), 156–164. https://doi.org/10.24076/joism.2024v5i2.1381
Andres, & Purnomo, A. S. (2024). Rancang Bangun Sistem Pakar Diagnosa Ispa Pada Apotek Adifarma Metode Certainty Factor. JEKIN - Jurnal Teknik Informatika, 4(2), 344–354. https://doi.org/10.58794/jekin.v4i2.806
Arif, M., & Risky, Z. (2025). Perancangan Sistem Pakar Penyakit Gigi Berbasis Website Dengan Metode Certainty Factor. Jurnal Sistem Informasi Dan Teknik Komputer, 10(2), 403–411.
Arvetona, A. V., & Pratama, W. A. W. (2024). Prevalensi Pulpitis Reversible Di Poli Gigi Puskesmas the Prevalence of Reversible Pulpitis At the Dental Polyclinic. Jurnal Kesehatan Poltekkes Palembang, 19(2), 154–159.
Bambang, S., Elisabeth, M., F., L., Herlina, P., M., Rina, F., Agus, R., Novi, B., Safrudin, S., Supriadi, S., Rosni, L., Mohammad, A., Jane, A., K., Novarina, M., K., Meliana, M., Hamka, H., stefanny, Z., W., Hernawan, I., Lidya, A., A., P., Ajeng, G., W., Anneke, A., T., & Agnes, M. (2024). Penyakit Gigi dan Mulut.
Burhani, Ananda Ayu ZahaBurhani, A. A. Z., Harijanto, B., & Pradibta, H. (2014). Sistem Pakar Diagnosis Penyakit Pada Kelinci Menggunakan Metode Certainty Factor. Jurnal Informatika Polinema, 1(1), 1. https://doi.org/10.33795/jip.v1i1.82ra, Harijanto, B., & Pradibta, H. (2014). Sistem Pakar Diagnosis Penyakit Pada Kelinci Menggunakan Metode Certainty Factor. Ju rnal Informatika Polinema, 1(1), 1. https://doi.org/10.33795/jip.v1i1.82
Febriani, H. A., Wijaya, D. P., Pramuntadi, A., & Prastowo, W. D. (2024). Sistem Pakar Diagnosa Penyakit Lambung Menggunakan Metode Certainty Factor Berbasis Web. MALCOM: Indonesian Journal of Machine Learning and Computer Science, 4(4), 1290–1300. https://doi.org/10.57152/malcom.v4i4.1402
Ira Zulfa, S.T., M. C. (2024). Pemrograman Web. 2, 306–312.
Kusumawati, K., Sitorus, B., & Elita Sari, C. liya. (2023). Penerapan Metode Certainty Factor Pada Sistem Pakar Diagnosa Penyakit Pencernaan. Prosiding, 4(4), 7–12. https://doi.org/10.59134/prosidng.v4i.546
Linda Rahayu, & Rizal Rizal. (2025). Rancangan Sistem Pakar Diagnosa Penyakit Gigi Menggunakan Metode Certainty Factor dengan Model UML Berbasis Web. Router: Jurnal Teknik Informatika Dan Terapan, 3(2), 65–84. https://doi.org/10.62951/router.v3i2.430
M. Mahaputra Hidayat, Adam Ridwan, Najmul Irfani, F. Y. (2023). Penerapan Metode Certainty Factor Pada Sistem Pakar Berbasis Web Untuk Diagnosis Penyakit Ayam. Jurnal Ilmu Teknik Dan Komputer, 7(2), 125–129. https://doi.org/10.22441/jitkom.v7i2.008
Marlinda, L. (2021). Sistem Pakar Perancangan dan Pembahasan.
Mugniati, D., & Witanti, A. (2025). Sistem Pakar Diagnosa Penyakit Anak Menggunakan Metode Certainty Factor. Jurnal Ilmiah Sistem Informasi Dan Ilmu Komputer, 5(3), 707–722. https://doi.org/10.55606/juisik.v5i3.1750
Muhammad, H., & Setyawan, A. A. (2025). Perancangan Sistem Informasi Penjualan Berbasis Web Menggunakan PHP. Jurnal Manajemen Dan Sistem (JMS), 04, 48–55.
Nas, C. (2019). Sistem Pakar Diagnosa Penyakit Gigi Dan Mulut Menggunakan Metode Case-Based Reasoning. Jurnal Digit, 9(2), 202. https://doi.org/10.51920/jd.v9i2.122
Nuraeni, F., Septiana, Y., & Siti Wahyuni, Y. (2025). Implementasi Metode Inferensi Certainty Factor Pada Sistem Pakar Diagnosa Penyakit Gigi. Jurnal Algoritma, 22(2), 923–932. https://doi.org/10.33364/algoritma/v.22-2.2124
Nurhayati, & Farida, S. (2021). Sistem Pakar Diagnosa Penyulit Menyusui Menggunakan Metode Certainty Factor. Jurnal Sistem Informasi Kaputama (JSIK), 5(2), 187–195.
R. Mulyadi, L. W. (2024). Sistem Pakar Diagnosa Penyakit Gigi Dan Mulut Menggunakan Metode Certainty Factor. Prosiding Seminar Nasional Terapan Riset Inovatif (SENTRINOV), 10(1), 305–312.