The purpose of this study was to find out whether there were changes in occlusal plane inclination after fixed orthodontic treatment of bimaxillary protrusion cases where extraction of four first premolars were needed using the standard Edgewise appliances. The sample were fourteen orthodontic patients, aged above sixteen years old, no sexual discrimination, treated with fixed appliances at Orthodontic Specialist Clinic Faculty of Dentistry Universitas Padjadjaran. The method was pre-post design which compared occlusal plane inclination obtained from tracings of lateral cephalograms before and after orthodontic treatment. The results were calculated with the paired t-test analysis. The study revealed that there were no significant changes in occlusal plane inclination after the orthodontic treatment.

Fixed orthodontic appliance will cause changes in microbial flora the oral cavity and food debris accumulation, and will be formed especially around the gingival sulcus. Plaque control using chemical means can be done by using mouth rinse. This research compared the influence of 0.05% sodium fluoride mouth rinse with aquadest, and 0.2% chlorhexidine to the plaque index in fixed orthodontic patients. A double blind and cross over clinical assessment were applied using a sample size of 16 male fixed orthodontic patients with the age above 21 years. 0.05% sodium fluoride, 0.2% chlorhexidine mouth rinse was given to all patients as a positive control, and aquadest as a negative control. Plaque index was then measured after 24 hours without tooth brushing, after using the mouth rinse and a week after using the mouth rinse with tooth brushing. The results showed that the use of 0.05% sodium fluoride mouth rinse reduced plaque index more significantly compared to 0.2% chlorhexidine. The mechanical plaque control by tooth brushing is still the most influential mean to reduce plaque index in fixed orthodontic patients. Mouth rinse is just an additional mean to reduce plaque.

On orthodontic treatment, accuracy of orthodontic brackets slot size is essential for maximum interaction between thewire and brackets, so as to distribute the optimal force for tooth movement. The purpose of this study was to determinethe accuracy of orthodontic brackets slot size to 0.018 inch standard sizes that are available in the market. The samplewas selected by using a random sampling system, which consists of 15 types of brackets of 8 bracket manufacturerswith a total sample of 300 samples. Measurements performed on 4 sides of slot bracket, namely the outer and innersides of the brackets slot, on mesial and distal sides, using a profile projector (Mitutoyo Type PJ250). The results werestatistically tested using t-test one side. All brackets have a slot size significantly larger than the standard size. Theaverage percentage of magnification ranged from 5.18-24.29%. So, it was concluded that the size of the slot bracketsavailable in the Indonesian market greater than their standard.

Despite rapid developments in adhesive technology, contamination of bonding surfaces remains a major problem. The aim of this study was to evaluate the influence of contamination on shear bond strength of two adhesive systems: resin-modified glass ionomer cement (Fuji Ortho LC; GC America Corp) and Moist Insensitive Primer (Transbond MIP, 3M Unitek) combination with Transbond XT (light-activated), under different enamel conditions. Metal brackets were bonded to the buccal surfaces of 42 human premolars. The total sample was divided into 6 groups (n = 7 teeth) and brackets were bonded with one of the 2 adhesives under 3 enamel surface conditions: (1) dry (2) saliva-contaminated (3) saliva and blood-contaminated. The shear bond strength was tested using Universal Strength Tester Autograph Shimadzu Corp. There was no significant difference in the shear bond strength between dry, saliva, and saliva-blood contamination bonded with MIP combined Transbond XT. There were significant differences in the shear bond strengths between dry and saliva -blood contaminated enamel bonded with Fuji Ortho LC. In conclusion, Fuji Ortho LC is not recommended for clinical bonding application under saliva-blood contaminated enamel conditions.

AbstrakProsedur heat treatment dengan suhu dan teknik yang tepat pada pegas T-loop segmental stainless steel dapat mengembalikan sifak-sifat mekanik kawat yang menurun akibat prosedur pembengkokan kawat. Penelitian ini bertujuan membandingkan gaya yang dihasilkan oleh pegas T-loop segmental stainless steel tanpa dan dengan heat treatment pada suhu 450 0 C selama 15 menit, dengan berbagai jarak aktivasi dan gable. Desain penelitian adalah eksperimental laboratoris murni secara in vitro. Penelitian dilaksanakan di Laboratorium Kimia Murni FMIPA ITB pada tahun 2006. Sampel adalah 50 buah pegas T-loop segmental dengan gable: 0°-0°, 7,5°-7,5°; 15°-15°; 22,5°-22,5°; 30-30°, terdiri atas 25 pegas tanpa heat treated dan 25 pegas dengan heat treated. Gaya diukur menggunakan autograph pada jarak tarik 1, 2, dan 3 mm, serta hasilnya dilakukan analisis statistik ANOVA dengan desain faktorial 2 x 3 x 5 dan 5 replikasi tiap sel serta uji posthoc Student Newman Keuls dan Tukey. Hasil uji statistik menunjukkan bahwa perlakuan heat treated dibanding dengan tanpa heat treated serta interaksi antara perlakuan heat treatment dan gable memberikan efek yang signifikan terhadap gaya yang dihasilkan The Effect of Heat Treatment on Mechanical Properties in Restoring Stainless Steel Segmental T-Loop towards the Force Created AbstractHeat-treatment procedure with precise temperature and technique on the stainless-steel segmental T-loop retraction spring can restore the mechanical properties that decreases after a wire-bending process. The goal of this study was to compare the force produced by a stainless-steel segmental T-loop spring without and with heat-treatment on 450 0 C for 15 minutes, with various activation distance and gable. The design of the study was in-vitro laboratory experimental design. This study was performed at the Chemistry Laboratory of the Faculty of Science, ITB in 2006. Sample included 50 segmental T-loop springs with α and β angle of 0°-0°, 7.5°-7.5°, 15°-15°, and 22.5°-22.5°, and 30°-30° which consisted of 25 springs without heat-treatment and 25 springs with heat-treatment. Force was measured using autograph with a retraction distance of 1, 2, and 3 mm and the results were gained from ANOVA statistics analysis with a factorial design of 2x3x5 and 5 replications for each cell and posthoc Student Newman Keuls and Tukey test. The result of the statistic test showed that heat-treatment compared to no heat-treatment and interaction between heat-treatment and gable gives significant effect to the force created (p-value <0.05). In conclusion, the heat-treatment on the stainless steel T-loop produces an effect to decrease the created force. [MKB. 2015;47(3):167-73]