Diastema is a space or gap between two or more adjacent teeth which can result in oral and esthetic problems. Orthodontic treatment is needed for diastema concerning inter alia itsetiology. We reported a 17-year-old male patient complaining of gaps between the front teeth of the upper jaw. Based on anamnesis, the patient was in good condition. Intra oral examination revealedmultiple diastemas between upper front teeth, high labial frenulum, overjet, dan overbite. There was a positive arch length discrepancy of upper jaw meanwhile the other analyses were in normal limit. The etiology of multiple diastemas in this case were small teeth on a relatively large jaw, and a high labial frenulum. The patient was treated using active and passive removable orthodontic appliance to fix the tooth gaps. After 10 times of activation, the diastemas were corrected then the patient was continued to the retentive phase using removable retainer of Hawley type to prevent relapse. In conclusion, diagnosis, examination, and choosing removable orthodontic appliance are important to correct the multiple diastemas. Maintenance and patient’s cooperation in using the active and retentive appliance are needed to achieve hard and soft tissue healthiness in the long run. Keywords: multiple diastemas; orthodontic treatment; removable orthodontic appliances; retentive phase; patient’s cooperation Abstrak: Diastema adalah ruang atau celah diantara dua atau lebih pada gigi secara berdekatan,yang dapat mengakibatkan berbagai masalah dalam rongga mulut dan estetik. Diperlukan penatalaksanaan khusus terhadap setiap masalah diastema, dengan memperhatikan faktor etiologi dan lainnya. Kami melaporkan seorang pasien laki-laki berusia 17 tahun dengan keluhan gigi terlihat berjarak pada gigi depan bagian atas yang mengganggu penampilan. Hasil anamnesis pasien memiliki keadaan umum baik, pemeriksaan ekstra oral pasien dalam batas normal, sedangkan intra oral ditemukan diastema pada gigi anterior atas, perlekatan frenulum mendekati margin gingiva, overjet, dan overbite. Analisis model kerja mendapatkan arch length discrepancy rahang atas yang positif, sedangkan hasil analisis lainnya dalam batas normal. Etiologi diastema pada kasus ini ialah besarnya lengkung gigi yang tersedia dan ukuran gigi yang cenderung kecil, serta perlekatan frenulum tinggi. Pada pasien ini dilakukan perawatan diastema multipel menggunakan alat ortodonti lepasan dengan alat aktif dan pasif untuk menutup celah yang terdapat di antara gigi. Hasil perawatan ialah diastema terkoreksi pada rahang atas setelah dilakukan aktivasi selama 10 kali, kemudiandilanjutkan ke fase retensi menggunakan retainer lepasan tipe Hawley untuk mencegah terjadinya relaps. Simpulan kasus ini ialah penegakan diagnosis, pemeriksaan dan pemilihan alat ortodonti lepasan aktif dapat mengoreksi masalah diastema multipel. Diperlukan fase pemeliharaan dan kerjasama pasien dalam penggunaan alat aktif dan alat retensi untuk mendapatkan hasil perawatan kesehatan jaringan keras dan jaringan lunak dalam jangka panjang. Kata kunci: diastema multipel; perawatan ortodonti; alat ortodontik lepasan; fase retensi; kerjasama pasien

Impacted teeth are teeth obstructed during the eruption process; the high prevalence of impacted teeth, especially third molars, accompanied by complaints that arise, requires omentectomy. Winter's classification shows various positions of impacted third molars based on angulation. This classification is judged to be describe the relationship of the apical position of the mandibular third molar tooth to the mandibular canal more clearly. The odontectomy procedure requires an excellent preoperative approach to consider the structures around the mandibular third molar, one of which is the mandibular canal, because the canal's proximity to the third molar root can increase the risk of nerve injury during the odontectomy procedure. This study aims to determine the relationship between the third mandibular impaction Winter classification and the mandibular canal distance on panoramic radiographs. The samples of this study were 53 and were grouped according to the position of the impaction vertically, mesioangularly, horizontally, and distoangularly. The study was conducted cross-sectionally by measuring the apical distance of the mandibular third molar to the upper border of the canal on a panoramic radiograph using a manual caliper. The space obtained was statistically analyzed using the eta correlation test. The results showed that 38 and 48 impactions were found to have the most mesioangular impaction, followed by horizontal, vertical, and distoangular paping the least. The mesioangular position measured the distance from the apical third molar of the impacted mandible to the closest distance to the mandibular canal, followed by the horizontal and the longest distance in the vertical position. Statistical tests were conducted to determine the relationship between the mandibular third molars and the mandibular canal. In the test results, the calculated F value on tooth 38 (2.64) and tooth 48 (0.507) was smaller than the F table value (2.794); this indicates there is no significant relationship between the two variables. The absence of a close relationship between the mandibular third molar distance and the mandibular canal indicates the possible low risk of complications in paresthesia after the odontectomy procedure.