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OBJECTIVES: To evaluate and compare the shear bond strength of stainless-steel brackets using three different light curing units. MATERIAL AND METHODS: Using three LED curing units (3M ESPE Elipar, Ivoclar bluephase, and Woodpecker I LED light cure), 120 precoated metal brackets (Gemini series, 3M Unitek) were cured. The shear bond strength was recorded using a universal testing machine. RESULT: The shear strength of the bracket in different light-curing systems was examined with ANOVA test. The mean shear strength of group A, group B, and group C were 16.03 ± 14.30 MPA, 16.86 ± 11.89 MPA, and 20.51 ± 19.40, respectively. The result of the analysis shows that there is a major difference in shear bond strength of these three different light-curing systems with F value = 3.94 and P value 0.04. CONCLUSION: We used three LED light-curing units with different intensities and manufacturing companies. The result showed that woodpecker I LED light had significantly highest mean SBS than the other two (Elipar LED curing light and 3M ESPE, Ivoclar bluephase).
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Post orthodontic treatment, retention is one of the most important step for prevention of relapse. Over the years many direct and indirect techniques for placing a bonded lingual retainer have been practiced clinically. Present clinical practice demands a much convenient and effortless technique for bonding a lingual retainer. This article describes a simplified technique of bonding a lingual retainer.
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Recubrimiento Dental Adhesivo/métodos , Retenedores Ortodóncicos , Grabado Ácido Dental/métodos , Aleaciones Dentales/química , Humanos , Alambres para Ortodoncia , Cementos de Resina/química , Acero Inoxidable/química , CerasRESUMEN
OBJECTIVE: The study was undertaken to evaluate and compare the stability and surrounding soft tissue reaction of the Drill and Drill-free miniscrews when used as anchorage unit for en-masse retraction of maxillary anteriors. METHODS: 20 patients were selected. Of the total 20 Drill and drill free screws, halfscrews were placed on the right side and half on the left side of maxilla and clinical evaluation for mobility and any surrounding soft tissue inflammation was done. RESULTS AND CONCLUSION: There were no statistically significant differences with respect to Stability/Failure and soft tissue reaction for Drill and Drill-free screws when used as anchorage units.
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Tornillos Óseos , Métodos de Anclaje en Ortodoncia/instrumentación , Diseño de Aparato Ortodóncico , Adolescente , Diente Canino/patología , Materiales Dentales/química , Femenino , Gingivitis/etiología , Humanos , Incisivo/patología , Masculino , Maxilar/patología , Miniaturización , Oseointegración/fisiología , Estudios Prospectivos , Acero Inoxidable/química , Propiedades de Superficie , Titanio/química , Técnicas de Movimiento Dental/instrumentación , Adulto JovenRESUMEN
AIM: Retraction of maxillary canines after first premolar extractions is a very common orthodontic task in cases of crowding or for the correction of large overjet. Many studies have been done to increase the rate of retraction. The aim is to compare the rate of canine retraction into recent extraction site with and without circumferential supracrestal fiberotomy. MATERIALS AND METHODS: The rate of movement of the canines into the recent extraction site of the first premolar with or without circumferential supracrestal fiberotomy was measured in 14 patients aged 13 to 22 years. The study was done on 9 maxillary and 5 mandibular arches. The appliance used in the present study was the preadjusted edgewise (0.022 inch Roth prescription) and retraction performed by frictionless mechanics using Composite T Loop. The distalization of canines was measured at regular intervals (T1, T2, T3 and T4). Recordings of the positions of the canines at the beginning and at different intervals were made from dental casts. RESULTS: The mean difference between the two sides for the total time span T1-T4, for maxillary arch was 0.36 mm and for mandibular arch was 0.60 mm respectively. CONCLUSION: There can be various factors that affect the rate of tooth movement. Factors like bone density, bone metabolism, and turnover in the periodontal ligament, amount of force applied may be responsible for the variation. CLINICAL SIGNIFICANCE: No clinically significant increased rate of retraction of cuspids in the recent extraction site with fiberotomy was found in comparison to the retraction in recent extraction site without fiberotomy.
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Diente Canino/patología , Encía/cirugía , Técnicas de Movimiento Dental/métodos , Alveolo Dental/patología , Adolescente , Diente Premolar/cirugía , Estudios de Seguimiento , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Mandíbula/patología , Maxilar/patología , Modelos Dentales , Diente Molar/patología , Diseño de Aparato Ortodóncico , Alambres para Ortodoncia , Ligamento Periodontal/cirugía , Extracción Dental/métodos , Técnicas de Movimiento Dental/instrumentación , Adulto JovenRESUMEN
In recent times, the use of miniscrew implants to obtain absolute anchorage has gained momentum in clinical orthodontics as rigid anchorage modality. Miniscrew implants offers many advantages when used as temporary anchorage devices like, easy placement and removal, immediate loading, can be used in a variety of locations, provide absolute anchorage, economic and requires less patient cooperation. This makes them as a necessary treatment option in cases with critical anchorage that would have otherwise resulted in anchorage loss if treated with conventional means of anchorage. The aim of this comprehensive review is to highlight the gradual evolution, clinical use, advantages and disadvantages of the miniscrew implants when used to obtain a temporary but absolute skeletal anchorage for orthodontic applications.