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All Journal Majalah Kedokteran Bandung Padjadjaran Journal of Dentistry
Tono S. Hambali, Tono S.
Fakultas Kedokteran Gigi Universitas Padjadjaran Bandung, Jalan Sekeloa Selatan, No. 1 Bandung
Biochemistry, Genetics & Molecular Biology Dentistry Health Professions Immunology & microbiology Medicine & Pharmacology Public Health

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Finite element method usage in determining pressure distribution of periodontal tissues on maxillary canine as result of orthodontic force Elih, E.; Hambali, Tono S.; Salim, Jono; Mardiati, Endah
Padjadjaran Journal of Dentistry Vol 23, No 2 (2011): July
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (428.81 KB) | DOI: 10.24198/pjd.vol23no2.14016

Abstract

The purpose of this study is to obtain data of pressure distribution on canine periodontal tissues due to the orthodontic force generated by various types of motion using the Finite Element Method. The development of digital technology creates a numerical analysis for orthodontic treatment that can be done by performing 3-D reconstruction by scanning the maxillary canine teeth with a CT scan so that 255 cross-sectional images is obtained. 3 D model is then processed using the Finite Element Method to obtain the pressure distribution on the periodontal tissues caused by tipping movements, bodily, torque, roots, rotation, and extrusion. The analysis used was the analysis of qualitative and quantitative analysis. The results showed that the maximum pressure that occurs in the periodontal tissues caused by a variety of movements ranging from 3.3 x 10-3MPa to 2.9 x 10-2 MPa. This indicates that the force exerted on each movement produces maximum pressure that exceeds capillary pressure was 2 x 10-3 MPa.
The effect of Gable angle size and spring activation distance of 0.016 x 0.022 NiTi and TMA sectional T-loop towards force, moment y and moment z values Wachyudi, Norman; Hambali, Tono S.; Salim, Jono; Mardiati, Endah
Padjadjaran Journal of Dentistry Vol 21, No 2 (2009): July
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1952.886 KB) | DOI: 10.24198/pjd.vol21no2.14091

Abstract

This study was carried out to find the effects of angle of Gable bends and amount of activations of 0.016 x 0.022 inch NiTi and TMA sectional T-loop springs to the force moment and moment delivered. The design of the research is true in-vitro laboratory experimental design, to measure the force, moment. and moments, an axial moment device was designed purposely. The samples were 30 springs comprised of 15 NiTi and 15 TMA with variations of Gable bends 0˚-0˚, 10˚-10˚, and 20˚-20˚ Force, moment and moments were measured at 1, 2, and 3 mm amount of activations. Data was tested statistically using the ANAVA with 3x2x3 factorial designs and 5 replications for each all. The results showed that angle of Gable bends, amount of activations and type of wires significantly affect the force and moments delivered, but the angle of Gable bends significantly affect moment. It could be concluded that the greater angle of Gable bends will produce the greater force and moments. The greater amount of activations will produce the greater force and moments.
Comparison of speed and accuracy between manual and computer-aided measurements of dental arch and jaw arch lengths in study model casts Wibisono, Dinah; Thahar, Bergman; Hambali, Tono S.; Salim, Jono
Padjadjaran Journal of Dentistry Vol 19, No 1 (2007): March
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.498 KB) | DOI: 10.24198/pjd.vol19no1.14170

Abstract

This research is aimed at observing whether there are differences in the measurement results between dental arch length and arch length measured manually and by using computer software, i.e. Corel Draw 12, in study model cast as well as the measurement speed in both techniques. The method used in this research is the descriptive comparative method. The measurement is performed to 52 study model cast samples with the Spee Curve depth of < 1.5 mm, between 1.5 and 3 mm, > 3 mm. The measurements are performed using 2 techniques: a manual technique using a calliper and by using Corel Draw 12, a computer program with a computer scanner. The t-test statistic is used to reveal whether there are differences in the measurement results between the two techniques and which method needs shorter time. Statistically, there are significant differences either in the speed of the measurement or the results of the measurement using both techniques where t-calculated > t table. The deeper the Spee curve, the more different the results from the manual technique and computed technique. The differences are in the range of 0.32 to 0.52 mm for dental arch length and 0.33 to 0.43 mm for arch length. These differences are still acceptable clinically. By referring to the results of this research, it is expected that computer usage can be increased and become an alternative against manual technique of measurement.
The effectiveness of paint remover to resin adhesive residue on base mesh of metal bracket Abubakar, Sukarto; Thahar, Bergman; Hambali, Tono S.; Salim, Jono
Padjadjaran Journal of Dentistry Vol 20, No 2 (2008): July
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1618.175 KB) | DOI: 10.24198/pjd.vol20no2.14133

Abstract

The purpose of this study is to know whether paint remover can be used to remove resin adhesive residue on the base mesh of metal bracket. The study is based on in vitro experiment with descriptive-comparative and the test sample is 30 used brackets after treatment at Orthodontic Specialist Clinic Faculty of Dentistry Universitas Padjadjaran. The sample is randomly divided into 3 groups and each group consists of 10 brackets and then its bath in paint remover for 8, 10, and 12 hours, respectively and statistically analyzed with chi-square (χ2) and α= 0.05 and the results show signifi cantly diff erence between resin residue before and after immersion, while resin residue after immersion its group showed there are no signifi cant diff erences. Based on analyzed, it can be concluded that paint remover can be used to remove resin adhesive residue on base mesh of metal bracket and that 8, 10, and 12 hours immersion duration the result show effectiveness similiary.
The comparison of 0.05% sodium fluoride and 0.2% chlorhexidine usage and aquadest to the plaque index on fixed orthodontic patients Wiraja, Veronica Vera D.; Hambali, Tono S.; Lambri, Soertini E.
Padjadjaran Journal of Dentistry Vol 19, No 1 (2007): March
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (355.432 KB) | DOI: 10.24198/pjd.vol19no1.14176

Abstract

The 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.
Soft tissue profile analysis using Ioi’s method for dentoalveolar bimaxillary protrusion cases before and after treatment with extractions of four first premolars Ziliwu, Yuliana; Hambali, Tono S.; Salim, Jono; Mardiati, Endah
Padjadjaran Journal of Dentistry Vol 20, No 2 (2008): July
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (566.307 KB) | DOI: 10.24198/pjd.vol20no2.14134

Abstract

The purpose of this study is to measure the soft tissue profile changes before and after treatment of dento-alveolar bimaxillary protrusion cases which had orthodontic treatment including extraction of upper and lower first premolars. Ioris soft tissue analysis used in this study and cephalometric analysis on 14 patients wich fulfilled sample criteria was performed. Four angular and two linear measurements were done manually utilizing protractor. Statistical analysis was paired t-test. The result showed significant changes in soft tissue after the treatment.
The changes of soft tissue profile in skeletal class II patients with mandibular retrognathy treated by the extraction of maxillary first premolars Hendri, H.; Hambali, Tono S.; Salim, Jono; Mardiati, Endah
Padjadjaran Journal of Dentistry Vol 20, No 2 (2008): July
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (345.171 KB) | DOI: 10.24198/pjd.vol20no2.14135

Abstract

The purpose of this research is to measure the change of soft tissue profile, both anteroposteriorly as well as vertically in skeletal class II patients with mandibular retrognathy cases, treated with extraction of the maxillary first premolars. Pre and post treatment result of 16 patient treated with the Standard Edgewise fixed appliance were compared using a Canon D646u series scanner and Corel Draw 12 computer programme, utilizing the TVL line as a plane of orientation. The result was analyzed with a paired t-test. Statistical analysis shows significant anteroposterior and vertical soft tissue changes in facial profile in skeletal class II patients with mandibular retrognathy treated with extraction of maxillary first premolars using the Standard Edgewise fixed appliance, measured with the STCA-VTL method.
Changes of occlusal plane inclination after orthodontic treatment with four premolars extraction in dento-alveolar bimaxillary protrusion cases Zenab, NR Yuliawati; Hambali, Tono S.; Salim, Jono; Mardiati, Endah
Padjadjaran Journal of Dentistry Vol 21, No 2 (2009): July
Publisher : Faculty of Dentistry Universitas Padjadjaran, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (232.753 KB) | DOI: 10.24198/pjd.vol21no2.14094

Abstract

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 was needed using the standard Edgewise appliances. The sample was 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 a 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.
Pengaruh Heat Treatment untuk Mengembalikan Sifat Mekanik Kawat T-loop Segmental Stainless Steel terhadap Besaran Gaya yang Dihasilkan Lavina, Avi; Hambali, Tono S.; Thahar, Bergman; Mardiati, Endah
Majalah Kedokteran Bandung Vol 47, No 3 (2015)
Publisher : Faculty of Medicine, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (963.251 KB)

Abstract

Prosedur 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 4500C 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 (p<0,05). Simpulan, heat treatment pada T-loop stainless steel menghasilkan efek berupa penurunan besar gaya yang dihasilkan. [MKB. 2015;47(3):167–73]Kata kunci: Gaya, heat treatment, T-loopThe Effect of Heat Treatment on Mechanical Properties in Restoring Stainless Steel Segmental T-Loop towards the Force CreatedAbstractHeat-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 4500C 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]Key words: Force, heat-treatment, T-loop DOI: 10.15395/mkb.v47n3.597
The changes of soft tissue profile in skeletal class II patients with mandibular retrognathy treated by the extraction of maxillary first premolars Hendri, H.; Hambali, Tono S.; Salim, Jono; Mardiati, Endah
Padjadjaran Journal of Dentistry Vol 20, No 2 (2008): July 2008
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (345.171 KB) | DOI: 10.24198/pjd.vol20no2.14135

Abstract

The purpose of this research is to measure the change of soft tissue profile, both anteroposteriorly as well as vertically in skeletal class II patients with mandibular retrognathy cases, treated with extraction of the maxillary first premolars. Pre and post treatment result of 16 patient treated with the Standard Edgewise fixed appliance were compared using a Canon D646u series scanner and Corel Draw 12 computer programme, utilizing the TVL line as a plane of orientation. The result was analyzed with a paired t-test. Statistical analysis shows significant anteroposterior and vertical soft tissue changes in facial profile in skeletal class II patients with mandibular retrognathy treated with extraction of maxillary first premolars using the Standard Edgewise fixed appliance, measured with the STCA-VTL method.
Co-Authors Avi Lavina, Avi Bergman Thahar, Bergman Dinah Wibisono, Dinah E. Elih, E. Endah Mardiati, Endah H. Hendri, H. Jono Salim, Jono Norman Wachyudi, Norman NR Yuliawati Zenab, NR Yuliawati Soertini E. Lambri, Soertini E. Sukarto Abubakar, Sukarto Veronica Vera D. Wiraja, Veronica Vera D. Yuliana Ziliwu, Yuliana