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"Indonesian Journal of Dentistry 2006; Edisi Khusus KPPIKG XIV: 210-214One of the impacts of traffic accident that is often seen by a dentist is mandible fracture. To prevent deformation of mandible because of a slow management, it is better to treat the fracture as soon as possible. The treatment can be done with an open/close reduction, depending on case. An immediate management of mandible fracture is very important to prevent malunion, malocclusion, and stomatoganathic dysfunction."

"ABSTRAK Latar Belakang: Impaksi Molar 3 rahang bawah telah diketahui akan meningkatkan resiko fraktur tulang mandibula terutama di daerah angulus mandibula. Fraktur angulus mandibula sering terjadi akibat kecelakaan lalu lintas di Indonesia. Masyarakat belum mengetahui pentingnya odontektomi sebagai langkah awal pencegahan fraktur angulus mandibula.Tujuan: Untuk mengetahui apakah terdapat hubungan dari adanya fraktur angulus mandibula dengan adanya impaksi molar 3 rahang bawah.Material dan Metode: Rekam medis pasien poli Bedah Mulut dan Maksilofasial Rumah Sakit Umum kabupaten Tangerang selama periode Januari 2013-Desember 2017 dikumpulkan dan didapatkan 41 orang dengan fraktur angulus mandibula. Setiap sampel diidentifikasi adanya fraktur angulus mandibula, adanya impaksi molar 3 rahang bawah, posisi erupsi impaksi molar 3 dan kelas impaksi menurut Pell dan Gregory. Data diolah dengan uji Chi Square dan Kolmogorov Smirnov, serta ditentukan Odd Ratio. Uji hipotesis korelatif dilakukan dengan Uji Contingency Coeficient, Phi ? ? ?, Cramer rsquo;s V, dan Kendall rsquo;s Tau-b.Kesimpulan: Ditemukan hubungan antara terjadinya fraktur angulus mandibula dengan adanya impaksi molar 3 bawah mandibula dengan p = 0,01 p < 0,05 dengan Odd Ratio = 4,615; memiliki hubungan korelatif dengan p = 0,010 p < 0,05 dengan kekuatan r = 0,272 lemah . Tidak ditemukan hubungan bermakna antara fraktur angulus mandibula dengan posisi erupsi Suprabony,Infrabony p=0,375 p>0,05 . Tidak ditemukan hubungan bermakna antara fraktur angulus mandibula dengan kelas impaksi menurut Pell dan Gregory p=0,087, p>0,05 .Tidak ditemukan hubungan bermakna antara fraktur angulus mandibula dengan Jenis Kelamin p=0,763 p>0,05 . Tidak ditemukan hubungan bermakna antara fraktur angulus mandibula dengan Usia p=1,000 p>0,05. ABSTRACT Background: Impacted third molar of mandibula have been studied to have a role in increasing mandible fracture especially in the mandibular angle region. Mandibular angle fractures are often the result of traffic accidents in Indonesia. People do not yet know the importance of odontectomy as a first step to prevent fracture of the mandibular angle.Objective: To determine whether there is association or correlation of the presence of angular fracture in the presence of lower third molar impaction.Materials and Methods: Medical records of patients with Oral and Maxillofacial Surgery of Tangerang District General Hospital during the period of January 2013-December 2017 were collected and obtained 41 people with mandibular angle fractures. Each sample identified an mandibular angle fracture, a lower third molar impaction, third molar impaction eruption position and an impaction class according to Pell and Gregory. The data were processed by Chi Square and Kolmogorov Smirnov, and Odd Ratio was determined. Test the correlative hypothesis with Contingency Coefficient, Phy ? ? ?, Cramer rsquo;s V, and Kendall Tau B test.Conclusion: There was found a association between the presence of mandibular angle fracture in the presence of mandibula lower 3 molar impaction with p = 0,01 p 0,05 . There was no significant association between mandibular angle fracture and Gender p = 0,763 p> 0,05 . There was no significant association between mandibular angle fracture and Age p = 1,000 p> 0,05"

"Tujuan: Mengetahui perbedaan hasil interpretasi superimposisi maksila dan mandibula antara tiga metode superimposisi pada kelompok usia non-growing ≥ 20 tahun. Metode superimposisi maksila yang diteliti adalah pada area best fit, Björk dan Skieller, serta Springate. Sementara metode superimposisi mandibula yang diteliti adalah pada tepi bawah mandibula, Björk dan Skieller, serta Springate. Metode: Tracing dilakukan pada foto sebelum perawatan (T0) dengan membuat garis panduan sella-nasion (SN) dan garis N yang tegak lurus terhadap SN serta struktur anatomis pada regio maksila atau mandibula. Sedangkan pada foto setelah perawatan (T1), tracing dilakukan hanya pada struktur anatomis pada regio maksila dan mandibula saja. Kemudian hasil tracing setelah perawatan (T1) disuperimposisikan di atas hasiltracing sebelum perawatan (T0) berdasarkan berbagai metode superimposisi maksila atau mandibula. Setelah itu garis SN dan N pada tracing sebelum perawatan dipindahkan ke atas hasil tracing setelah perawatan. Terakhir, posisi titik referensi pada maksila (titik ANS, A, dan U1) atau mandibula (titik Pog, B, dan L1) diukur jarak koordinatnya secara vertikal dan horizontal ke garis SN dan N yang berperan sebagai sumbu x dan y. Hasil: Tidak terdapat perbedaan, baik dalam dimensi vertikal maupun horizontal, mengenai hasil interpretasi superimposisi maksila dan mandibula dengan tiga metode superimposisi yang diujikan pada kelompok usia non-growing ≥ 20 tahun. Kesimpulan: Evaluasi perawatan ortodontik pada pasien usia non-growing ≥ 20 tahun menggunakan berbagai metode superimposisi maksila dan mandibula menghasilkan hasil interpretasi yang sama, baik diukur dalam dimensi vertikal maupun horizontal. Sehingga pemilihan metode superimposisi maksila dan mandibula apapun pada pasiennon-growing tidak akan mempengaruhi hasil interpretasi evaluasi perawatan, selama metode superimposisi yang digunakan tetap memperhatikan struktur anatomis yang ada.

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Objectives: To compare the interpretation of maxillary and mandibular superimposition between three methods on ≥ 20-year-old non-growing patients. Three maxillary superimposition methods used during the study were best fit, Björk-Skieller, and Springate. Meanwhile for mandibular superimposition, the methods used during the study were inferior border of mandible, Björk-Skieller, and Springate. Method: Tracing was executed on pre-treatment cephalogram (T0) to construct sella-nasion (SN) line and N line which was perpendicular to SN, and also to construct anatomical structures on maxilla or mandible. Tracing at post-treatment cephalogram (T1) was executed on maxillary or mandibular anatomical structures only. Then cephalogram tracing at T1 was superimposed on T0 based on three different superimposition methods on maxilla or mandible. SN line and N line at T0 were then transferred into T1 tracing as a reference line of x and y axis. Hence, the position of maxillary reference points (ANS, A, and U1) or mandibular reference points (Pog, B, and L1) could be accounted vertically and horizontally to the x and y axis. Results: No statistical difference in vertical or horizontal dimention, regarding the interpretation of maxillary and mandibular superimposition between three methods on ≥20-year-old non-growing patients. Conclusion: Post orthodontic treatment evaluation on ≥ 20-year-old non-growing patients using varied maxillary and mandibular superimposition methods may result the same interpretation in vertical or horizontal dimention. Any maxillary or mandibular superimposition methods could be used on non-growing patients and may not affect interpretation on post treatment evaluation, as long as the used methods account any existing anatomical structures."

"Impacted third mandibular molar seems as a common and easy case but actually a difficult one when the odontectomy proceeds. besides, another unpredicted problems ofte appear such as fractured lip, traumatized and damaged of the mandibular canal. To decide the odontectomy procedure, a dentist has to do the examination systematically. In this case, radiographic examination is very important to perceive the location as well as shape of the third molar, especially its position to the adjacent anatomic structure that has to be considered during operation. This whole view will help dentist to decide appropriate approach.A special radiographic examination enables dentist to predict the treatment result more accurately, since the location and shape of the tooth correctly perceived. With this more complete diagnostic information, an appropriate treatment plan could be arranged and unfavorable risk could be limited, therefore complication and failure could be avoided."

"A young girl 20 years old with mandibular prognatism has been treated with orthodontics and surgical treatment in between. Mandibular set back was done intra orally 5mm length with bilateral sagital split ramus osteotomy method. And rigid fixation was done by inserting three 2mm bicortical screws for stabilizing the fragment. This method allowed the bony segments to heal properly and allowed the patients to function sooner."

"The purpose of this study was to evaluate the changes of maxillary and mandibular sagital position relative to cranial base. The subject of this research was patients with bimaxillary protrusion having orthodontic treatment and four first premolars extraction. The maxillary and mandibular position changes were measured by angular and linier parameters. Angular parameter as described by Steiner's analysis were SNA and SNB angles. Linier parameter as described by McNamara's analysis were point A nad Pogonion relatives to nasion perpendicular. The results of both groups was compared statistically and differences quantified using paired t-test. There was no significant changes in position of maxilla relatives to cranial base. On the other hand, significant changes were found in position of mandibula relatives to cranial base."

"Thos case report described the skeletal and dental changes contributing to class II skeletal with mandibula retrognatism correction with Twin Blocks appliance. Cephalometric evaluation were compare between pre-treatment and after eight month treatment wearing Twin Blocks appliance at an 8 year, 1 month old girl patient. This short-term cephalometric study indicates that after eight month treatment with Twin Blocks appliance, the overjet reduces 3 mm correction of the first molar permanent from class II Angle (cusp to fossa) to class II Angle (cusp to cusp) and lengthening the mandible."

"The purpose of this study is to examine vertical dimension changes after orthodontic treatment involving the extractions of maxillary and mandibular first premolar. Records of 33 patients consecutively selected consist of 30 females and 3 males with class I malrelation of 14 subjects class ll malrelation of 19 subjects. 19 subject were treated with Edgewise technique and 14 sublects were treated with Begg technique. Mean chronologic age was 20-33 years with the range between 16 and 30 years old. The vertical dimensional changes were measured by three angular and eight linier parameters of pretreatment and posttreatment lateral cephalometric radiographs. The measurements were analyzed for statistical difference by paired t test. There was statistically significant difference in SNMP, FMPA, anterior face height, lower anterior face height, upper anterior dental height, lower anterior dental height, upper posterior dental height, lower posterior dental height. But there was no statistically difference in Y-axis, upper anterior face height and posterior face height."

"Complete diagnosis in dentistry needs more detail and accurate quantitative as well as qualitative jawbone trabeculation evaluation. This requires modern diagnostic radiography that in Indonesia are still very limited. One form of the periodontitis that demands more attention and detailed information due to the great efforts to overcome, is Rapidly Progressive Periodontitis, and thus this disease has chosen as a model in this study. The objective of this study to get more detail and accurate radiometric of Direct Digital Intraoral value from grading Conventional value. This methode expected to be a model of studies on jawbone quality in dentistry. The healting RPP patients as a subjects of this study. The methods trabeculation density from mandibular DDIR and conventional periapical radiographs of 116 healthy subjects and 41 RPP patients were evaluated and correlated to obtain transformation formula in the form of regression function. This study was performed Clinic of Dental Radiology and Periodontology, Faculty of Dentistry, University of Indonesia function were then used as a methode to obtain quantitative data from conventional radiographs available. The results were indicated a significant independent variables were included in the regression function (p<0.05). Therefore even no DDIR equipment available, this transformation enable dentists all over Indonesia with only conventional radiographs available, to obtain more detail quantitative trabeculation density data. The conclusion is apart from getting a methode to transform conventional radiographic data into radiometric data equal to data obtained from DDR that more detail and accurate, this study also provides the normal radiographic trabeculation density value of peron 20-40 years as data base for further studies."