Mohsin Aslam Wani

Abstract

Introduction: In orthodontic treatment, brackets need to slide along the archwire to allow for alignment of the teeth. The lesser the friction between the bracket and the archwire, the easier it is to align the teeth and the lighter the forces required to make such movements. In recent years, patients’ esthetic demands have driven the field of orthodontics to find alternatives to conventional stainless steel bracket systems. While ceramic brackets meet the esthetic demands, their inferior frictional characteristics have always been an issue for orthodontists. Aim and Objectives: The present in-vitro research study evaluates and compares the frictional resistance between various types of brackets, archwire materials and ligation methods. The purpose of the study was to equate the frictional resistance among 12 different groups using the universal testing machine, so as to recognize the factors involved in the in-vitro appraisal of resistance to sliding (RS) and inferring their clinical implications. Materials and Methods: In this study, 120 pre-adjusted edgewise upper central incisor brackets with MBT 0.022? slot were used, which included 40 standard metal brackets, 40 ceramic brackets, 20 self-ligating metal brackets and 20 self-ligating ceramic brackets. 0.019? x 0.025? SS (stainless steel) archwires, esthetic archwires, Teflon-coated ligatures and conventional elastic modules to ligate the archwire to the brackets except in self-ligating brackets, were used. Results: The average frictional resistance of Group A10 was the minimum succeeded by A9, A12, A4, A11, A8, A3, A7, A2, A6, A1 and A5. In the comparison of the mean frictional resistance of 12 different groups, the ANOVA test showed noticeably different frictional resistance amongst the groups (F=745.80, P< 0> Keywords: Friction, Frictional Resistance (FR), Conventional brackets, Self­ligating brackets, Teflon­coated archwires, Elastomeric modules, Teflon­coated ligature

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Abstract

The correction of skeletal malocclusions in orthodontics has always been a contest for clinicians, especially in non-growing individuals, and often necessitates the distalization of maxillary or mandibular skeletal bases. To accomplish this, diverse treatment modalities have been employed by researchers, and the most recent one is the use of extra-alveolar bone screws such as Infra-zygomatic Crest (IZC) implants. Unlike conventional methods such as extraction and orthognathic surgery, this technique is an effective and efficient treatment alternative for predictable total arch distalization in borderline surgical cases, without interfering with the root movements and with minimal dependence on patient compliance. For achieving the displacement of teeth in a bodily controlled manner, an appropriate direction and magnitude of force must be carefully chosen. Therefore, this case report attempts to measure the amount and pattern of maxillary molar distalization using Infra-zygomatic Crest (IZC) implants with long power arms as a workable treatment option, in an 18-year-old female patient with a skeletal Class II pattern, with no extra mini-implants in the anterior region for intrusion.   Keywords: Temporary Skeletal Anchorage Devices (TSADs), Infra­zygomatic Crest (IZC) bone screw, Total arch distalization, Zygomatic crest, Centre of resistance (Cres), Extra-alveolar (EA) implants

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Abstract

Background: This research work was designed to appraise and equate the remineralizing efficiency of two calcium-based phosphate delivery agents, Casein Phosphopeptide-Amorphous Calcium Phosphate (CPP-ACP) and Calcium Sucrose Phosphate (CaSP) for preventing the development of White Spot Lesions (WSL) around the orthodontic brackets. Materials and Methods: Forty orthodontically removed premolar teeth were randomly allocated to Group 1(n=20) - (CPP-ACP) and Group 2(n=20) - (CaSP). All the specimens were subjected to FESEM and EDS analysis before the initial demineralization phase and after 14 days of the pH cycling phase, to observe and record changes in surface topography and mineral content (Ca/P ratio % wt.). Statistical data for the Intragroup comparison were analyzed by using Paired sample t-test, whereas for the Intergroup comparison, an Unpaired t-test was performed. Furthermore, the One-way ANOVA test was applied for comparing Intragroup data and the Post-hoc Tukey test was applied to compare Intergroup data. Results: Group 1 samples showed an 11.3%increase in remineralization and Group 2 samples showed a 21.3%increase in remineralization, indicating a statistically significant (p < 0> Conclusion: The use of Calcium Sucrose Phosphate (CaSP) tooth cream around the orthodontic brackets seems to produce significantly better remineralization effects.   Keywords: Orthodontic brackets, White spot lesion (WSL), Remineralization, Calcium Sucrose Phosphate.

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