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"Latar Belakang: Etiologi temporomandibular disorder (TMD) adalah multifaktor, salah satunya adalah kebiasaan parafungsi yaitu sleep bruxism. Pasien sleep bruxism sering mengalami tanda dan gejala TMD yaitu nyeri dan keterbatasan pembukaan mulut. Oleh karena itu evaluasi deteksi lebar pembukaan mulut digunakan rutin untuk pemeriksaan sendi temporomandibula, namun hubungan sleep bruxism dengan lebar pembukaan mulut ini masih kurang jelas. Tujuan: Menganalisis reliabilitas dan validitas kuesioner sleep bruxism dan menganalisis apakah terdapat hubungan antara sleep bruxism dengan lebar pembukaan mulut. Metode: Desain potong lintang. Kuesioner sleep bruxism dievaluasi menggunakan internal consistency reability test dan metode test-retest (ICC value), sedangkan validitas diukur dengan validasi konvergen, dan untuk hubungan antara sleep bruxism dengan lebar pembukaan mulut dilakukan dengan analisa bivariat. Hasil: Nilai Cronbach's alpha 0.515 menunjukkan konsistensi internal yang cukup baik, dan nilai ICC test-retest > 0.808 sehingga disimpulkan kuesioner adalah reliabel, sedangkan hasil uji validitas dengan uji korelasi koefisien kontingensi adalah berbeda bermakna (p<0.05) dengan nilai korelasi lemah 0.362. Dengan demikian, alat ukur kuesioner sleep bruxism versi Bahasa Indonesia reliabel dan valid. Untuk lebar pembukaan mulut maximum comfortable, tidak ditemukan perbedaan bermakna antara pasien sleep bruxism dengan non sleep bruxism, dan antara pasien sleep bruxism TMD dengan sleep bruxism non TMD (p>0.05), sedangkan lebar pembukaan mulut maximum assisted pada pasien sleep bruxism TMD dan sleep bruxism non TMD terdapat perbedaan bermakna (p<0.05). Berdasarkan jenis kelamin, lebar pembukaan mulut maximum comfortable antara pria dan wanita berbeda bermakna (p<0.05). Kesimpulan: Kuesioner sleep bruxism dalam bahasa Indonesia reliabel dan valid sehingga dapat digunakan di Indonesia. Tidak terdapat hubungan antara sleep bruxism dengan lebar pembukaan mulut.

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Background: The etiology of temporomandibular disorders (TMD) is multifactor, one of them is parafunctional habit, such as sleep bruxism. Patients with sleep bruxism are more likely to experience jaw pain and limitation of jaw movement, than people who do not. Limitation of mouth opening is one of the cardinal signs found in TMD. Therefore, evaluation of maximum mouth opening is used as part of routine function assessment of temporomandibular joint, but the relationship between sleep bruxism and mouth opening is still unclear.

Objective: To analyze the reliability and validity of sleep bruxism questionnaire in Indonesia and also to analyze the relationship between sleep bruxism and mouth opening.

Methodolgy: Cross-sectional design. Sleep bruxism questionnaire was evaluated using internal consistency reability test and test-retest methods (ICC value), while the validity was analyzed by convergent validity. The relationship between sleep bruxism and mouth opening was analyzed with bivariate analysis.

Results: Cronbach's alpha showed moderate result (0.515), and ICC test-retest value was above 0.808, meaning the questionnaire was reliable. Validity analysis using coefficient contingency correlation showed significantly different (p<0.05) and weak correlation value (0.362). Thus, the Indonesian version of sleep bruxism questionnaire was reliable and valid. Relationship between maximum comfortable mouth opening on sleep bruxism and non bruxism, and between sleep bruxism non TMD and sleep bruxism with TMD were not significantly different (p>0.05), but relationship between assisted mouth opening on sleep bruxism non TMD and sleep bruxism with TMD were significantly different (p<0.05). Based on gender, maximum comfortable mouth opening were significantly different between sleep bruxism non TMD and sleep bruxism with TMD (p<0.05).

Conclusion: The Indonesian version of sleep bruxism questionnaire is reliable and valid, and there is no relationship between sleep bruxism and maximum mouth opening."

"Every dentist knows about bruxism, however, the etiology. the treatment, and the relationship between bruxism and temporomandibular disorders (TMD) are still unknown and controversial. Bruxism can happen to all ages, from children (15% of all children) to adults (96% of all adults), male and female. Given the data, what can a dentist do to help the patient with bruxism? The various clinical signs that can be found in these patients are excessive tooth wear, muscle and joint fatigue, headache, tooth sensitivity or mobility, fractures of teeth and restorations, as well as TMD symptoms. Currently no method can permanently eliminate bruxism, but there are several ways to help patients with symptoms caused by parafunctions. Two categories of bruxism are bruxism without symptoms and bruxism with symptoms that lead to temporomandibular disorders. To make the patient aware of the destructive parafunctional activities, self-monitoring, biofeedback, medications, occlusaladjustment and fabricating a splint can reduce the unfavorable consequences of bruxism, although they usually do not stop it. Periodical control is advisable."

"Latar Belakang: Adanya perubahan pada metode pembelajaran akibat Covid-19 meningkatkan waktu yang dihabiskan untuk menatap layar (screen-time) yang berpotensi mengganggu kualitas tidur mahasiswa kedokteran gigi yang sebelum pandemi ini telah dilaporkan memiliki persentase kualitas tidur buruk yang cukup tinggi. Bedasarkan penelitian sebelumnya, kualitas tidur yang buruk juga dikaitkan dengan insidens TMD. Tujuan: Menganalisis hubungan antara kualitas tidur dengan TMD pada mahasiswa kedokteran gigi selama pandemi Covid-19. Penelitian ini juga bertujuan untuk menganalisis pengaruh jenis kelamin dan screen-time terhadap kualitas tidur dan TMD. Metode: Penelitian ini menggunakan desain potong lintang pada 110 mahasiswa Program Pendidikan Kedokteran Gigi dan Program Profesi Dokter Gigi Fakultas Kedokteran Gigi Universitas Indonesia. Pengambilan data dilakukan dengan pengisian kuesioner Pittsburgh Sleep Quality Index (PSQI) dan Indeks Diagnostik – Temporomandibular Disorder (ID-TMD) secara daring melalui google form. Hasil Penelitian: Uji Chi-Square menujukkan kualitas tidur memiliki hubungan bermakna dengan TMD pada mahasiswa kedokteran gigi selama pandemi Covid-19 (p=0.035). Hubungan yang bermakna juga ditunjukkan antara screen-time dengan kualitas tidur (p=0.027), namun tidak dengan TMD (p=0.489). Jenis kelamin juga tidak memiliki hubungan bermakna, baik dengan kualitas tidur (p=0.974) maupun TMD (p=0.902). Kesimpulan: Terdapat hubungan antara kualitas tidur dengan TMD pada mahasiswa kedokteran gigi selama pandemi Covid-19.Terdapat pula hubungan antara screen-time dengan kualitas tidur. Namun tidak terdapat hubungan antara screen-time dengan TMD, serta jenis kelamin dengan kualitas tidur maupun TMD.

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Background: Changes in learning methods and increased screen-time due to Covid-19 pandemic may lead dental students to poor sleep quality. Based on previous studies, poor sleep quality also associated with the incidence of TMD. Objectives: The aim of this study is to analyze the relationship between sleep quality and TMD in dental students during Covid-19 pandemic. This study also aims to analyze the influence of gender and screen-time to sleep quality and TMD. Method: Cross-sectional study was conducted on 110 pre-clinical and clinical year students of Faculty of Dentistry, Universitas Indonesia. Sleep quality was evaluated using Pittsburgh Sleep Quality Index (PSQI) questionnaire and TMD was evaluated using Indeks Diagnostik – Temporomandibular Disorder (ID-TMD) questionnaire. Retrieval of data using questionnaires distributed and collected online. Result: The result of Chi-Square test showing there is relationship between sleep quality and TMD in dental students during Covid-19 pandemic (p=0.035). Significant relationship was also showed between screen-time and sleep quality (p=0.027), but not with TMD (p=0.489). There is no relationship between gender and sleep quality (p=0.974) as well as TMD (p=0.902). Conclusion: This study shows that there is relationship between sleep quality and TMD in dental students during Covid-19 Pandemic. Significant relationship was also found between screen-time and sleep quality. However, no relationship was found between screen-time and TMD along with gender and sleep quality as well as TMD."

"Indonesian Journal of Dentistry 2006; Edisi Khusus KPPIKG XIV: 155-158The causes of TMD are complex and multifactorial, therefore the management should be done by several disciplines. ln this report, a 27-year-old man came to the teaching hospital of the University of Indonesia Faculty of Dentistry's Prosthodontic Department complaining about clicking sound and pain around his right joint. He received orthodontic treatment 9 years ago with removable appliance at a private practice and had 4 premolar extraction. The patient's face looked asymmetric, with a low vertical dimension, a Class II occlusion, and an anterior deep bite. Besides that, he clenched his teeth during emotional stress. Lateral tanscranial photo showed that the position of the left condyle was relatively normal or slightly anterior, and the right condyle was in the superoposterior position in the fossa with an abnormal shape. To solve this problem, the patient was referred to the Orthodontic Deparment to get a correct vertical dimension and normal anterior overbite. After 6 years, the patient was again referred to the prosthodontic Department, but the result was not successful. In order to get the right vertical dimension, an occlusal splint was fabricated to achieve a comfort jaw relation. In this position, the overbite was 2 mm, but space between the upper and lower posterior teeth was 5 mm. In this situation, full veneer crowns were not impossible to fabricate. Finally, to maintain this comfort position, the patient was suggested to wear the occlusal splint and come regularly for control every 6 months."

"Latar Belakang: Prevalensi kecemasan pada mahasiswa lebih tinggi dibandingkan pada populasi umum. Hal ini dipengaruhi oleh beberapa faktor, antara lain faktor akademis, status sosioekonomi, faktor budaya, moral, psikologis, dan biologis. Tingginya tingkat kecemasan juga meningkatkan risiko terjadinya gangguan sendi temporomandibula pada mahasiswa.Tujuan: Mengetahui hubungan antara kecemasan dan gangguan sendi temporomandibula pada mahasiswa, serta mengetahui hubungan antara jenis kelamin, status sosioekonomi (tingkat pendidikan orang tua dan jumlah pendapatan keluarga), dan faktor budaya (asal daerah) dengan kecemasan dan gangguan sendi temporomandibula pada mahasiswa.Metode: Studi dengan desain cross-sectional berupa kuesioner online, yang disebarkan pada bulan November 2021 kepada mahasiswa Universitas Indonesia dengan jumlah responden 527 mahasiswa. Kuesioner yang diberikan merupakan State-Trait Anxiety Inventory yang terdiri dari 2 bagian dengan total 40 pertanyaan dan berfungsi untuk mengukur kecemasan, serta Temporomandibular Disorder Diagnostic Index (TMD-DI) yang berjumlah 8 pertanyaan dan digunakan untuk mengukur gangguan sendi temporomandibula.Hasil Penelitian: Uji chi-square menunjukkan adanya perbedaan bermakna (p<0.05) kecemasan, baik A-State maupun A-Trait, terhadap gangguan sendi temporomandibula. Uji korelasi kendall menunjukkan kecemasan, baik A-State maupun A-Trait, memiliki korelasi bermakna yang bersifat positif dan lemah terhadap gangguan sendi temporomandibula. Uji chi-square menunjukkan adanya perbedaan bermakna (p<0.05) jenis kelamin terhadap kecemasan,baik A-State maupun A-Trait. Kemudian, uji korelasi kendall menunjukkan jenis kelamin memiliki korelasi bermakna secara statistik terhadap kecemasan. Namun, uji continuity correctionmenunjukkan tidak adanya perbedaan bermakna (p 0.05) jenis kelamin terhadap gangguan sendi temporomandibula. Uji chi-square juga menunjukkan tidak terdapat perbedaan bermakna (p 0.05) status sosioekonomi (tingkat pendidikan orang tua dan jumlah pendapatan keluarga) dan faktor budaya (asal daerah) terhadap kecemasan dan gangguan sendi temporomandibula. Kesimpulan: Terdapat hubungan antara kecemasan, baik A-State maupun A-Trait, dengan gangguan sendi temporomandibula pada mahasiswa. Terdapat pula hubungan antara jenis kelamin dengan kecemasan, baik A-State maupun A-Trait, pada mahasiswa. Namun, tidak terdapat hubungan antara jenis kelamin dengan gangguan sendi temporomandibula, serta status sosioekonomi (tingkat pendidikan orang tua dan jumlah pendapatan keluarga) dan faktor budaya (asal daerah) dengan kecemasan, baik A-State maupun A-Trait, dan gangguan sendi temporomandibula pada mahasiswa.

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Background: The prevalence of anxiety in college students are higher than in general population. This can be influenced by several factors, including academic, socioeconomic status, cultural, moral, and also biological factors. The high level of anxiety also increases the risk of temporomandibular disorder in college students.

Objective: This study aims to find out the association between anxiety and temporomandibular disorder, and also find out the association between gender, socioeconomic status (parental education and monthly family income), and cultural factor (origin) with anxiety and temporomandibular disorder in college students.

Methods: A cross-sectional study using online questionnaire of 527 students from University of Indonesia, that conducted on November 2021. There are two given questionnaires, State-Trait Anxiety Inventory that consisted of two part and 40 questions in total to assess anxiety, and Temporomandibular Disorder Diagnostic Index that consisted of 8 questions tao assess temporomandibular disorder.

Result: The chi-square test showed that there was a statistically significant difference (p<0.05) of temporomandibular disorder based on anxiety, either A-State or A-Trait. The kendall correlation test showed that temporomandibular disorder, have positive and weak statistically significant correlation to anxiety, either A-State or A-Trait. The chi-square test showed that there was a statistically significant difference (p<0.05) of anxiety, either A-State or A-Trait, based on gender. The kendall correlation test also showed that gender, have positive and weak statistically significant correlation to anxiety, either A-State or A-Trait. However, the continuity correction test showed that there was no statistically significant difference (p 0.05) of temporomandibular disorder based on gender. The chi-square test also showed that there was no statistically significant difference (p 0.05) of anxiety, either A-State and A-Trait, and temporomandibular disorder based on socioeconomic status (parental education and monthly family income) and cultural factor (origin).

Conclusion: There was an association between anxiety, either A-State or A-Trait, and temporomandibular disorder, as well as gender and anxiety, either A-State or A-Trait, in college students. However, no association was found between gender and temporomandibular disorder, as well as socioeconomic status (parental education and monthly family income) and cultural factor (origin) with anxiety,either A-State or A-Trait, and temporomandibular disorder in college students. "

"Indonesian Journal of Dentistry 2006; Edisi Khusus KPPIKG XIV: 421-426Temporomandibular joint disorder may be caused by variety of factors; one of which is the posture of head and neck. However, the remains controversial and a subject of debate by experts. The objective of this study was to know whether there was a relation between temporomandibular disorders and the head and neck posture seen radiographically. Subject were 40 dental students from University of Indonesia who met the inclusion criteria, selected through questionnaire, and subjective examinations based on Helkimo's dysfuction index. Then, lateral cephalometries radiographic were done to all subjects. In the radiogram, a horizontal line was made from the nasion point to the sella tursica, and a vertical line was drawn along the prominent bone of C1 - C5. The angle between the two lines was measured, and used to represent the head and neck posture. The design of the study was cross sectional. Based on statistical analysis, there was no significant relationship between the anamnestic dysfunction index as well as the clinical dysfunction index that represented the temporomandibular joint disorders and the posture of head and neck seen radiographically."

"Pola grinding oklusal selama sleep bruxism dan kelainan temporomandibular. Sleep Bruxism merupakan salah satu etiologi terjadinya temporomandibular disorder (TMD), dan menyebabkan banyak kelainan di rongga mulut seperti keausan gigi atau faset. Namun, hingga kini belum ada penelitian tentang hubungan antara sleep bruxism dan TMD. Tujuan: Untuk mengetahui apakah ada hubungan antara pola grinding oklusal selama sleep bruxism dan kelainan temporomandibular. Metode: Penelitian cross-sectional dilakukan melibatkan 30 pasien yang diduga mengalami sleep bruxism yang datang ke Rumah Sakit Pendidikan Fakultas Kedokteran Gigi Universitas Indonesia (FKG UI RSGMP). Mereka mengisi 2 kuesioner, yaitu kuesioener berisi indeks ID-TMD dan kuesioner dari American Academy of Sleep Medicine. BruxChecker dibuat sesuai untuk masing-masing pasien, kemudian digunakan selama dua malam untuk merekam pola grinding oklusal. Pola grinding oklusal dikategorikan menjadi sisi laterotrusive grinding (LG) dan sisi mediotrusive. Selanjutnya, LG dibagi menjadi tiga klasifikasi: gigi insisif-kaninus (IC), gigi insisif-kaninus-premolar (ICP) dan gigi insisif-kaninus-premolar-molar (ICPM). Sisi Mediotrusive diklasifikasikan sebagai kontak mediotrusive (MC) dan mediotrusive grinding (MG). Hasil: Ditemukan bahwa pola grinding oklusal pada subjek tidak TMD adalah IC + MC, subjek dengan TMD ringan adalah ICP + MG, dan subjek dengan TMD moderat adalah ICP + MG dan ICPM + MG. Pola grinding ICP dan ICPM mempengaruhi TMJ lebih signifikan dibandingkan dengan pola grinding IC. Simpulan: Terdapat hubungan yang bermakna antara pola grinding oklusal selama sleep bruxism dan TMD.

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Sleep Bruxism is a significant etiology of temporomandibular disorder (TMD) and causes many dental or oral problems such as tooth wear or facet. There is no study analyzing the relationship between sleep bruxism and TMD. Objective: To investigate any relationship between occlusal grinding pattern during sleep bruxism and temporomandibular disorder. Methods: A cross-sectional study involving 30 sleep bruxism patients attended the Faculty Dentistry Universitas Indonesia Teaching Hospital (RSGMP FKG UI). Completion of 2 forms of ID-TMD index and questionnaire from American Academy of Sleep Medicine were done. BruxChecker was fabricated and used for two nights to record the occlusal grinding pattern. The occlusal grinding pattern was categorized into laterotrusive grinding (LG) and mediotrusive side. Further divisons of LG were: incisor-canine (IC), incisor-caninepremolar(ICP) and incisor-canine-premolar-molar (ICPM). Mediotrusive side was classified as mediotrusive contact (MC) and mediotrusive grinding (MG). Results: It was found that occlusal grinding pattern in non-TMD subjects were IC+MC, in subjects with mild TMD were ICP+MG and in subjects with moderate TMD were ICP+MG and ICPM+MG. TMJ was more significantly affected by ICP and ICPM grinding pattern than that of IC. Conclusion: There was a significant relationship between occlusal grinding pattern during sleep bruxism and TMD."

"Latar belakang: Sleep bruxism merupakan aktivitas oromandibular stereotip sewaktu tidur yang ditandai oleh grinding dan clenching gigi. Penderita sleep bruxism umumnya identik dengan adanya nyeri temporomandibular disorder (TMD). Metode: Penelitian potong lintang ini menggunakan 97 subjek terdiri dari 38 orang laki-laki dan 59 orang perempuan, dengan rentang usia 17-55 tahun. Penilaian sleep bruxism dilakukan menggunakan kuesioner oleh American Academy of Sleep Medicine versi Bahasa Indonesia, serta penilaian TMD dilakukan menggunakan indeks diagnostik DC/TMD. Hasil: Terdapat hubungan yang signifikan secara statistik antara sleep bruxism dan TMD. Sleep bruxism, jenis kelamin dan stress emosional menjadi faktor prediktor terhadap TMD. Pada analisis multivariat dengan regresi logistik diketahui bahwa jenis kelamin dan stress emosional berpengaruh terhadap TMD dengan odds ratio (OR) masing-masing sebesar 3,113 dan 4,043, sedangkan sleep bruxism tidak memiliki pengaruh yang signifikan terhadap TMD dengan OR sebesar 1,141. Kesimpulan: Sleep bruxism berhubungan dengan TMD, namun memiliki pengaruh yang lebih kecil dibandingkan dengan jenis kelamin dan stress emosional.

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Background: Sleep bruxism is a stereotypical oromandibular activity during sleep characterized by grinding and clenching of teeth. Patients with sleep bruxism are generally associated with temporomandibular disorder (TMD) pain. Methods: This cross-sectional study used 97 subjects consisting of 38 male and 59 female, with an age range of 17-55 years. The assessment of sleep bruxism was carried out using Indonesian version of the questionnaire based on the American Academy of Sleep Medicine sleep bruxism questionnaire, and the TMD assessment was carried out using the DC/TMD diagnostic index. Results: There was a statistically significant relationship between sleep bruxism and TMD. Sleep bruxism, gender and emotional stress are predictors of TMD. In multivariate analysis with logistic regression, it was found that gender and emotional stress had an impact on TMD with odds ratio (OR) of 3.113 and 4.043, respectively, while sleep bruxism had no significant impact on TMD with an OR of 1.141. Conclusion: Sleep bruxism is associated with TMD, but has a smaller impact compared to gender and emotional stress."

"Latar belakang: Sleep bruxism merupakan aktifitas parafungsi yang berhubungan dengan keadaan tidur. Salah satu penyebabnya adalah stres (?home stress? dan ?pengaruh home stress terhadap pekerjaan?) pada lingkungan kerja dengan tanggung jawab dan resiko tinggi seperti profesi aircrew pada lingkungan penerbangan. Namun penelitian mengenai stres dan sleep bruxism pada aircrew di Indonesia belum pernah dilakukan. Tujuan: Menganalisis hubungan antara stres dengan sleep bruxism pada aircrew. Metode: Subjek terdiri dari 214 aircrew maskapai penerbangan nasional Indonesia. Subjek melakukan pengisian 2 kuesioner yaitu modifikasi Sloan and Cooper?s questionnaire dan kuesioner sleep bruxism. Penelitian ini melalui 2 tahap yaitu pada tahap pertama dilakukan uji validasi dan reliabilitas modifikasi Sloan and Cooper?s questionnaire, kemudian tahap kedua dilakukan uji potong lintang. Hasil: Uji Mann-Whitney menunjukkan tidak terdapat hubungan bermakna antara ?home stress? dan umur dengan sleep bruxism (p > 0.05). Uji t tidak berpasangan menunjukkan terdapat hubungan bermakna antara ?pengaruh home stress terhadap pekerjaan? dengan sleep bruxism (p < 0.05). Uji Chi-Square tidak menunjukkan hubungan bermakna antara jenis kelamin dan jabatan dengan sleep bruxism (p>0.05). Kesimpulan: Tidak terdapat hubungan yang bermakna antara ?home stress? dan sleep bruxism, namun terdapat hubungan yang bermakna antara ?pengaruh home stress terhadap pekerjaan? dan sleep bruxism pada aircrew.

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Background: Sleep bruxism is parafunctional activities that related to sleep condition. One of the etiology is stress (?home stress? and ?effect home stress at work?) at working environment with high risk and responsibility such as aircrew in aviation. However research about stress and sleep bruxism among aircrew inIndonesia has not yet been done.

Objective: To analyze the relationship between stress and sleep bruxism among aircrew.

Methods: 214 subjects are aircrew at national Indonesia airline. Subjects were ask to fill 2 questionnaires i.e. modification of Sloan and Cooper?s questionnaire and sleep bruxism questionnaire. This study was analyzed in 2 steps, the first was to test the validity and reliability of modification Sloan and Cooper's questionnaire, and the second step was cross-sectional design.

Result: Mann-Whitney test showed that there was no significantly difference between ?home stress? and age with sleep bruxism (p > 0.05). Unpaired-t test showed that there was significantly difference between ?effect home stress at work? with sleep bruxism (p < 0.05). Chi-Square test showed that there was no significantly difference between gender and job position with sleep bruxism (p> 0.05).

Conclusion: There was no correlation found between ?home stress? and sleep bruxism, however a correlation found between ?effect home stress at work? with sleep bruxism among aircrew."

"[Salah satu gejala TMD dapat berupa keterbatasan gerak mandibula yang antara lain dapat dilihat melalui besar pembukaan mulut. Telah terdapat penelitian tentang besar pembukaan mulut di negara lain, tetapi belum pernah dilakukan di Indonesia. Penelitian dilakukan untuk melihat hubungan besar pembukaan mulut dengan TMD di Indonesia. Penelitian menggunakan metode potong lintang pada 223 mahasiswa UI berusia 17-22 tahun. Subjek mengisi kuesioner Indeks Diagnostik-TMD dan diukur besar pembukaan mulutnya. Hasil uji t tidak berpasangan menunjukkan perbedaan bermakna pada rata-rata besar pembukaan mulut subjek TMD dan non-TMD (p=0,005). Ditemukan hubungan antara besar pembukaan mulut dengan Temporomandibular Disorders di Indonesia.;One of the symptoms of Temporomandibular Disorders (TMD) is limitation of mandibular movement that is reflected in mouth opening. Study of measurement of mouth opening has not been done in Indonesia. The aim of this study was to analyze the relationship between width of mouth opening and TMD in Indonesia. Cross-sectional study was performed towards 223 UI students aged 17-22. Firstly, subjects had to fill the TMD-Diagnostic Index questionnaire, then mouth opening was measured. Independent t-test showed significant difference between width of mouth opening in TMD and non-TMD subjects (p=0,005). There was a relationship between width of mouth opening and TMD in Indonesia, One of the symptoms of Temporomandibular Disorders (TMD) is limitation of mandibular movement that is reflected in mouth opening. Study of measurement of mouth opening has not been done in Indonesia. The aim of this study was to analyze the relationship between width of mouth opening and TMD in Indonesia. Cross-sectional study was performed towards 223 UI students aged 17-22. Firstly, subjects had to fill the TMD-Diagnostic Index questionnaire, then mouth opening was measured. Independent t-test showed significant difference between width of mouth opening in TMD and non-TMD subjects (p=0,005). There was a relationship between width of mouth opening and TMD in Indonesia]"