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"Indonesian Journal of Dentistry 2006; Edisi Khusus KPPIKG XIV: 102-106Pendulum appliance is one of intra oral appliances to distalize molars for correction of class II molar relationship or space gaining in the maxillary arch. Its major advantages are no need to depend on patient compliance, ease of fabrication, and better patient acceptance. In this case, 22 years old female patients with class ll division 2 malloclussion were treated with pendulum appliance for unilateral distalation of the maxillary molar teeth. Pendulum can distalize second molar until 4 mm in 4 months and continues to distalize first molar in 3 month. Nevertheless, relaps 2mm happens during anterior retraction. This case has shown that pendulum is an effective and reliable appliance for distalizing maxillary molars. However, molar distalization is at the expense of moderate anchorage loss during anteior retraction, which could possibly be reduced if the anchor unit is adequately reinforced."

"Tema Inverted pendulum banyak diteliti oleh peneliti dunia, salah satu temanya adalah pemodelan dan perancangan pengendali. Tema inilah yang diambil sebagai tema penelitian dalam tesis ini. Dalam tesis ini dimodelkan tiga jenis inverted pendulum yaitu Single Inverted Pendulum, Double Inverted Pendulum, dan Dual Inverted Pendulum. Model matematik dari ketiga jenis inverted pendulum ini diturunkan dari persamaan Euler- Lagrange. Model matematik yang didapatkan disimulasikan menggunakan matlab simulink. Dari hasil simulasi didapatkan bahwa ketiga jenis inverted pendulum ini tidak stabil namun demikian ketiga jenis inverted pendulum ini dapat dikendalikan sehingga ketiga jenis inverted pendulum ini dapat distabilkan. Untuk menstabilkan sistem inverted pendulum digunakan pengendali LQR. Dari hasil simulasi terlihat bahwa sistem inverted pendulum dapat distabilkan, namun kestabilan sistem hanya dapat dipenuhi dalam batasan nilai variabel keadaan yang tertentu.

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Inverted pendulum is widely studied by researchers around the world. One of its research themes is modeling and control design. This theme also becomes the research focus of this thesis. In the research, three types of inverted pendulum have been studied. That are Single Inverted Pendulum, Double Inverted Pendulum and Dual Inverted Pendulum. Mathematical models of these inverted pendulums are derived from the Euler-Lagrange equation. Based on these models, simulation is carried out by using Matlab/Simulink. Simulation results showed that the inverted pendulums are not stable but controllable. Therefore the inverted pendulums can be stabilized. In this research, LQR controller is used to stabilize the inverted pendulum systems. Simulation results show that the inverted pendulum systems could be stabilized only within limited range of the state variable values."

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Latar belakang: Maloklusi merupakan masalah gigi dan mulut dengan prevalensi terbayak ke-3 di dunia, menurut WHO. Keadaan ini tidak diimbangi dengan adanya kesadaran mengenai maloklusi dan efek buruknya. Masih banyak anak-anak dan remaja yang belum mengetahui mengenai maloklusi dan menganggap hal tersebut normal. Kesadaran terhadap maloklusi ini dapat memengaruhi kebutuhan perawatan ortodonti. Tujuan: Mengetahui hubungan antara tingkat kesadaran maloklusi dengan kebutuhan perawatan ortodonti pada remaja, korelasi komponen ICON dengan kebutuhan perawatan, dan korelasi komponen kuesioner dengan kesadaran maloklusi Metode: dilakukan penelitian potong lintang pada 56 remaja berusia 12-15 tahun. Subjek diberikan kuesioner mengenai kesadaran maloklusi dan kemudian dilakukan pencetakan rahang dan pembuatan model studi untuk dinilai kebutuhan perawatan ortodontinya berdasarkan ICON. Hasil: Berdasarkan uji Chi-square, tidak terdapat perbedaan bermakna secara statistik antara kesadaran maloklusi dengan kebutuhan perawatan ortodonti (P>0,05). Berdasarkan uji Kendall’s tau-b, komponen estetika dental dan pertanyaan mengenai masalah pada gusi mempunyai korelasi paling besar terhadap kebutuhan perawatan dan kesadaran maloklusi. Kesimpulan: Tidak terdapat hubungan antara kesadaran mengenai maloklusi dan kebutuhan perawatan ortodonti pada remaja, kompnen estetika dental dan pertanyaan mengenai masalah pada gusi mempunyai korelasi paling besar.

 

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Background: Malocclusion is the third most common oral problem in the world. This situation is not supported with an adequate awareness of malocclusion. There are still children and adolescents who are not aware about malocclusion and consider the situation is normal. Awareness of malocclusion can influence the need for orthodontic treatment. Objectives: Discover the relationship between malocclusion awareness and orthodontic treatment needs among adloescent, correlation between ICON components and treatment needs, and correlation between questionaire component with awareness of malocclusion Methods: A cross-sectional study was done towards adolescents aged 12-15. They were given questionaire about awareness of malocclusion and jaws impressing were also done which were used to make study models in order to determine the treatment needs according to ICON. Result: According to Chi-square test, there is no statistically significant difference between awareness of malocclusion and orthodontic treatment needs (P>0,05).  Based on Kendall’s tau-b test dental aesthetic and question about gum problems have the greatest correlation toward treatment needs and malocclusion awareness. Conclusion: There is no relationship between malocclusion awarenes and orthodontic treatment needs among adolescent. Dental aesthetic and question about gum problems have the greatest correlation toward treatment needs and malocclusion awareness.

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"Pendahuluan : Overjet yang besar pada maloklusi kelas II divisi 1 ditengarai mampumenimbulkan gangguan pada sendi temporomandibula. Perawatan ortodontik denganpencabutan dua gigi premolar bertujuan untuk memperbaiki profil sertamenyeimbangkan oklusi. Tujuan dari penelitian ini adalah untuk menganalisis perubahanposisi kondilus sebelum dan sesudah perawatan ortodontik.Metode : Digunakan 60 foto transkranial sebelum dan sesudah perawatan ortodontik.Subjek penelitian dipilih berdasarkan kriteria inklusi berupa kasus maloklusi kelas IIdivisi 1, ANB ³ 50, overjet ³ 6 mm, memiliki gangguan sendi temporomandibulasebelum perawatan ortodontik dimulai serta memiliki foto transkranial. Evaluasi posisikondilus dilakukan dengan mengukur jarak Anterior Joint Space, Posterior Joint Spacedan Superior Space yang diterjemahkan menjadi posisi supero-anterior dan posisi nonsupero-anterior pada kondilus kanan dan kiri. Perubahan posisi kondilus sebelum dansesudah perawatan ortodontik diuji menggunakan Mc Nemar.Hasil : Diketahui bahwa tidak ada perbedaan bermakna (p>0,05) posisi kondilus sebelumdan sesudah perawatan ortodontik pada kasus maloklusi kelas II divisi 1 denganpencabutan dua gigi premolar. 19 subjek memiliki posisi supero-anterior pada kondiluskanan dan kiri sebelum dan sesudah perawatan, sedangkan 11 subjek memiliki posisi nonsupero-anterior pada kondilus kanan dan kiri sebelum dan sesudah perawatan.Kesimpulan : Perawatan ortodontik disertai pencabutan dua gigi premolar menyebabkanperubahan posisi kondilus, namun tidak berbeda bermakna secara statistik. Sebelum dansesudah perawatan ortodontik, sebagian besar kondilus tetap berada di posisi superoanterior.Sesudah perawatan ortodontik, gejala berupa rasa tidak nyaman saat membukamulut lebar dan keterbatasan membuka mulut sudah hilang, sedangkan gejala berupakliking dan krepitasi masih ada.

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Introduction : Increased overjet in malocclusion class II div 1 leads totemporomandibular joint dysfunction. Orthodontic treatment with upper premolarsextraction is due to correct profile and to harmonize occlusion. This paper will analyzealteration condylar position before and after orthodontic treatment.Methods : Transcranial projection was performed of 60 radiographs (30 radiographbefore and 30 radiograph after orthodontic treatment). Subjects were choosed based oninclusion criteria : malocclusion class II div 1, ANB ³ 50, overjet ³ 6 mm, patient hadtemporomandibular symptoms before orthodontic treatment, and all patients hadtranscranial radiograph. Condylar position was determined according to Anterior JointSpace, Posterior Joint Space and Superior Space which convert to supero-anteriorposition condyle right and left and non supero-anterior position condyle right and left.The Mc Nemar Test was used to analyze the data.Results : No statistically significant (p>0,05) alteration condyle position before and afterorthodontic treatment with extraction upper premolar. 19 subjects had supero-anteriorcondyle position, before and after orthodontic treatment and 11 subjects had non superoanteriorcondyle position before and after orthodontic treatment.Conclusion : The results of this study showed that orthodontic treatment with extractionupper premolars cause alteration condylar positions, but not statistically significant.Before and after orthodontic treatment, most of all condyles showed in superoanteriorpositions."

"A factor to pay attention to in orthodontic treatment is the inclination of upper and lower incisives. The inclination could be evaluated from interincisal angle and angle of upper incisive (UI) with cranium base (SN). This research is to evaluate those angles after the retraction of upper and lower incisives on malocclusion class I with bimaxillary prostrusion. In total, 34 samples were treated using edgewise system. The results show that mean for UI ? LI is 138.06°±1.47°, and for UI ? SN 95.97°±1.27°."

"Latar Belakang : Maloklusi merupakan masalah yang angka prevalensinya cukup besar di Indonesia. Perawatan terhadap maloklusi perlu dilakukan sejak dini. Selama pubertas, laju pertumbuhan kembali meningkat sehingga dapat dimanfaatkan untuk perbaikan maloklusi. Pengetahuan mengenai pertumbuhan tengkorak dan rahang, terutama maksila dan mandibula, menjadi sangat penting untuk menentukan rencana perawatan yang tepat. Tujuan: Penelitian ini bertujuan untuk mengetahui rerata panjang maksila dan mandibula pada anak laki-laki dan perempuan usia 10-16 tahun. Metode : Metode penelitian yang digunakan adalah deskriptif dengan desain potong lintang. Subjek penelitian berupa 211 radiograf sefalometri anak usia 10-16 tahun. Hasil : Pertambahan panjang maksila pada anak laki-laki yang paling besar terjadi pada usia 14 tahun ke 15 tahun. Pertambahan panjang maksila dan mandibula pada anak perempuan, serta mandibula pada anak laki-laki yang paling besar terjadi pada usia 13 tahun ke 14 tahun. Tidak terdapat perbedaan rerata panjang maksila maupun mandibula antara anak laki-laki dengan anak perempuan usia 10-13 tahun, sedangkan pada usia >13-16 tahun, terdapat perbedaan. Terdapat perbedaan pada rerata panjang maksila dan mandibula antara anak laki-laki usia 10-13 tahun dengan anak laki-laki usia >13-16 tahun, begitu juga pada anak perempuan.

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Background: Malocclusion prevalence rate is a quite large problem in Indonesia. Treatment of malocclusion should be done. During puberty, the growth rate increased so that it can be used to correct malocclusion. Knowledge of the growth of the skull and jaw, especially the maxilla and mandibular, becomes very important to determine proper treatment plan.

Objective: The aim of this study was to determine the average length of maxilla and mandibular in 10-16 years old boys and girls.

Methods: The method that is used in this research was descriptive with cross-sectional design. The subjects were 211 cephalometric radiographics of 10-16 years old children.

Result: The highest growth rate of the maxilla in boys occurred at the age of 14 years to 15 years. The highest growth rate of maxilla and mandibular in girls, and the highest growth rate of mandibular in boys occurred at the age 13 to 14 years. The average length of the maxilla and mandibular between boys and girls 10-13 years old has no difference, while there is a difference in >13-16 years old. There is a difference between the maxillary and mandibular length of 10-13 years old boys with >13-16 years old boys, and also for the girls."

"[ABSTRAKSaat ini, kebutuhan akan kesehatan gigi semakin meningkat khususnya pada bidang ortodontik. Tujuan utama dari perawatan ortodontik adalah memperbaiki kondisi maloklusi. Maloklusi menyebabkan masalah estetis pada wajah pasien serta menyebabkan kodisi tidak nyaman seperti pada saat bernapas, menelan bahkan berbicara. Jika tidak diperbaiki, maloklusi dapat menyebabkan kondisi yang lebih serius seperti resiko gigi berlubang lebih besar, gusi iritasi, pembusukan gigi, dan lain-lain. Kondisi maloklusi dapat diperbaiki dengan menggunakan perawatan braket ortodontik. Problematika yang terjadi saat ini adalah seluruh braket ortodontik yang ada di Indonesia merupakan produk impor, hal ini menyebabkan perkembangan keahlian seorang dokter gigi di Indonesia menjadi sangat tergantung dengan perkembangan desain yang terjadi di luar negeri, tanpa dapat berinovasi membuat suatu mekanisme teknik perawatan baru berdasarkan desain yang diteliti oleh dokter gigi itu sendiri. Tujuan dari penelitian ini adalah untuk memproduksi braket ortodontik serta sebagai sarana terhadap dokter gigi di Indonesia untuk dapat mengembangkan keahlian serta meneliti braket ortodontik sesuai dengan desain yang diinginkan. Produksi braket ortodontik dilakukan dengan menggunakan metode investment casting. Hasilnya menunjukan bahwa braket ortodontik telah berhasil diproduksi dengan dimensi yang berada dalam toleransi serta kualitas kekasaran permukaan yang baik. Penelitian ini merupakan tahap awal dalam studi pengembangan produksi braket ortodontik dengan metode investment casting.

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ABSTRACTCurrent, the need for dental health is increasing, especially in orthodontic field. The main purposes of orthodontic treatment is to improve the condition of malocclusion. Malocclusion causes aesthetic problems on the patient's face and causing uncomfortable conditions such as breathing, swallowing and even talking. If not corrected, malocclusion can lead to more serious conditions such as a greater risk of tooth decay, gum irritation, and others. Malocclusion can be corrected using orthodontic bracket treatment. The problems that occur nowdays is the entire orthodontic bracket in Indonesia are imported, this has led to the development of the expertise of a dentist in Indonesia to be very dependent on the development of the design which occurred abroad, without being able to create a new design examined by dentists themselves. The purpose of this research is to produce an orthodontic bracket as well as a means to dentists in Indonesia to be able to develop expertise and researching the orthodontic bracket in accordance with the desired design. Production orthodontic bracket is done by using the investment casting process. The result showed that the orthodontic bracket has successfully produced with dimensions that are within tolerance and good quality of surface roughness. This study is an early stage of the development production of orthodontic bracket by using investment casting process., Current, the need for dental health is increasing, especially in orthodontic field. The main purposes of orthodontic treatment is to improve the condition of malocclusion. Malocclusion causes aesthetic problems on the patient's face and causing uncomfortable conditions such as breathing, swallowing and even talking. If not corrected, malocclusion can lead to more serious conditions such as a greater risk of tooth decay, gum irritation, and others. Malocclusion can be corrected using orthodontic bracket treatment. The problems that occur nowdays is the entire orthodontic bracket in Indonesia are imported, this has led to the development of the expertise of a dentist in Indonesia to be very dependent on the development of the design which occurred abroad, without being able to create a new design examined by dentists themselves. The purpose of this research is to produce an orthodontic bracket as well as a means to dentists in Indonesia to be able to develop expertise and researching the orthodontic bracket in accordance with the desired design. Production orthodontic bracket is done by using the investment casting process. The result showed that the orthodontic bracket has successfully produced with dimensions that are within tolerance and good quality of surface roughness. This study is an early stage of the development production of orthodontic bracket by using investment casting process.]"