Introduction: Cephalometric analysis have been widely used in orthodontics. The analysis can be conducted in two methods: conventional and digital methods. Practitioners prefer using computerized cephalometric analysis due to its simplicity and less time-consuming compared to manual or conventional method. The objective of this study was to identify discrepancies between Conventional Steiner cephalometric analysis and digital cephalometric analysis using CephNinja® Application. This study was an experimental in vivo study with descriptive and comparative approach. Methods: Thirty two negative and digital cephalograms were traced manually using Steiner analysis and digitally using CephNinja® software application. Tracing results of manually analyzed cephalogram and digitally analyzed cephalogram were then compared. Results: There were no distinguished discrepancies between the tracing results of both manually and digitally analyzed cephalogram using Steiner analysis. Conclusion: there was no significant difference of steiner cephalometric analysis conducted using conventional tracing and digital method using CephNinja® application software.

Introduction: Ameloglyphics is the study of enamel print patterns on the tooth surface. Enamel print patterns are unique to each individual as they differ on each tooth. The similarity of tooth prints on buccal and lingual surfaces remains questionable as no research has been conducted thus far. The premolar was chosen in this experiment due to its low risk of damage because it is protected by cheek and rarely used compared to other teeth. Thus, the results obtained will be more precise and have higher accuracy than using other teeth. This research was aimed to investigate the differences between enamel print patterns on buccal and lingual surfaces of maxillary right first premolar. Methods: An analytic study was conducted by observing and analysing a total of 34 teeth samples using the purposive sampling method. The middle third of the buccal and lingual tooth surfaces was captured directly after magnified with a stereomicroscope. Photomicrographs of samples were then analysed using SourceAFIS biometric software. This software will process the image and shows patterns of enamel print. Afterwards, the enamel print patterns were observed and classified according to Manjunath Classification. Results: The results suggested that all 34 samples show a similarity of enamel print patterns on both the buccal and lingual surfaces. The interpretations of photomicrographs were statistically analysed using the Statistical Package of Social Science (SPSS) software. The similarity may be due to the same placement of developing tooth bud, temperature, environmental factor, genetics, pressure and nutrition to the ameloblasts cells in a tooth. Conclusion: Both buccal and lingual in the samples show high similarity due to the very high frequencies of similar sub-patterns occur on both surfaces. Tooth print can be used as a valuable tool in forensic science for personal identification with good prospects in the field of forensic dentistry.

Introduction: Twin-block appliance is simple removable bite block mostly used in the management of Class II malocclusion. It can modify the occlusal inclined plane to guide the mandible protrusion. Hence, when the patients are wearing the Twin-block appliances, this altered biomechanical environment and will stimulate the growth of the secondary cartilage of condyle and will caused the condyle to change in size, volume or position the in long term. The aim of this study was to investigate the changes of horizontal distance from condyle to nasal septum after the Twin-block treatment on Class II division 1 with retrognathic mandible. Methods: There were total 5 samples of panoramic radiograph before Twin-block treatment and 5 samples of panoramic radiograph after Twin-block treatment. The panoramic radiographs were traced to identify the changes of horizontal distance from condyle to nasal septum after the Twin-block treatment. The distance from the middle of nasal septum to the most superior surface of condyle head for right region and left region were measured, then the differences were statistically analyzed. Results: The horizontal distance from the middle of nasal septum to the most superior surface of condyle head after the Twin-block treatment increased. The difference of condyle position before and after the treatment of Twin-block.was slight (p-value > 0.05). Conclusion: There is no significant difference in horizontal distance from the most superior surface of condyle head to the middle of nasal septum before and after treatment of Twin-block.

Gigi insisif lateral maksila merupakan gigi yang memiliki bentuk dan ukuran yang bervariasi. Tujuan penelitian ini adalah untuk mengetahui frekuensi kelainan ukuran mesiodistal gigi insisif lateral maksila berdasarkan Woelfel. Metode: Jenis penelitian adalah deskriptif. Pengukuran mesiodistal gigi insisif lateral maksila menggunakan kaliper digital. Sampel sebanyak 35 mahasiswa diperoleh dengan teknik purposive sampling dilakukan pada ras Deuteromelayu. Hasil: Rata-rata ukuran mesiodistal gigi insisif lateral maksila pada regio 1 dan 2 adalah 6,28 mm (17,94%) dan 6,20 mm (17,71%). Nilai minimum dan maksimum regio 1 adalah 3,50-7,44 mm, sedangkan pada regio 2 adalah 3,46-7,77 mm. Terdapat 4 gigi insisif lateral maksila (11,42%), sepasang gigi (bilateral) insisif lateral maksila dan dua gigi insisif lateral maksila unilateral (kiri) yang memiliki kelainan ukuran. Jumlah yang mengalami kelainan pada gigi 12 sebanyak 1 gigi (2,85%), dan gigi 22 sebanyak 3 gigi (8,57%). Kelainan ukuran hanya terjadi pada 32 sampel perempuan (9,38%) dan termasuk kedalam golongan mikrodonsia (5,71%). Simpulan: Frekuensi kelainan ukuran mesiodistal gigi insisif lateral maksila berdasarkan Woelfel pada sub-ras Deuteromelayu sebanyak 3 orang dengan jenis kelainan mikrodonsia sejumlah 4 gigi dengan angka kejadian 2 gigi pada bilateral insisif lateral maksila dan dua gigi insisif lateral maksila unilateral. Kata kunci: Gigi insisif lateral maksila, abnormalitas ukuran mesiodistal. Frequency of mesiodistal size abnormality of maxillary lateral incisors based on Woelfel in the Deutro-Malays sub-race