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1.
Cient. dent. (Ed. impr.) ; 17(1): 15-17, ene.-abr. 2020. ilus
Artículo en Español | IBECS | ID: ibc-189753

RESUMEN

La terminología hipomineralización incisivo-molar (HIM) fue descrita por primera vez en 2001 para explicar los defectos de desarrollo cualitativos demarcados del esmalte, que afectan a uno o más molares permanentes, con o sin participación de los incisivos per-manentes1. En los últimos años, las investigaciones han dado lugar a informes de lesiones comparables en segundos molares temporales hipomineralizados, sin embargo, se desconoce si la presencia de opacidades demarcadas en los caninos temporales también puede asociarse con el HIM1-3. Da Silva y cols., en 2017, son los únicos autores hasta el momento que relacionan hipomineralizaciones en segundos molares temporales (HSPM) y caninos temporales (HPC)3. La prevalencia de HSPM varía dependiendo de los países entre 2,9% a un 21,8% 3,7.Se puede esperar que las causas de los defectos de hipomineralización en los segundos molares temporales sean las mismas que en los dientes permanentes, si ocurren conco-mitantemente a la calcificación de su corona, la cual comienza alrededor de la decimooctava semana de gestación 4-7. Se presenta el caso de un paciente infantil, de 6 años, que acudió a consulta para revisión odontológica. Tras la exploración, se observó la presencia de anomalías del color y estructura en: todos los segundos molares y caninos temporales, así como en los primeros molares temporales superiores y primer molar temporal inferior izquierdo (Figuras 1-6). La posterior exploración radiográfica mostró hallazgos patológicos localizados en 54, 64, 65, 74, 75, 84, 85 (Figuras 7-9). El tratamiento supone un desafío ya que es frecuente que los dientes afectados presenten afectación pulpar, además de hipersensibilidad y descomposición post*eruptiva. Esta relación podría sugerir como factor predictivo de aparición de HIM, la presencia HSPM y HPC, así podrían implementarse las medidas de prevención y control con intervalos más frecuentes en estos pacientes


No disponible


Asunto(s)
Humanos , Masculino , Niño , Desmineralización Dental/diagnóstico por imagen , Desmineralización Dental/epidemiología , Decoloración de Dientes/etiología , Desmineralización Dental/prevención & control , Decoloración de Dientes/prevención & control , Radiografía Panorámica
2.
Diagn Microbiol Infect Dis ; 93(3): 238-242, 2019 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-30442509

RESUMEN

Tetracycline antimicrobials entered into clinical usage in the late 1940s. Permanent dental staining from tetracyclines was first appreciated in 1956, eventually leading to avoidance of this class of antibiotics whenever possible in young children and pregnant or breastfeeding women. Doxycycline, introduced in 1967, binds calcium less avidly than prior tetracyclines and is regarded by some authorities as safe to prescribe for pregnant women and young children. Review of the available data, however, suggests that this interpretation may be incorrect or at least premature. In conclusion, until more definitive data are developed, doxycycline should continue to be only selectively prescribed for young children and pregnant or breastfeeding women for whom alternative, safer antibiotics are not available, and courses of treatment should be of as short a duration as possible.


Asunto(s)
Antibacterianos/administración & dosificación , Doxiciclina/administración & dosificación , Anomalías Inducidas por Medicamentos/etiología , Antibacterianos/efectos adversos , Lactancia Materna , Doxiciclina/efectos adversos , Femenino , Humanos , Embarazo , Seguridad , Decoloración de Dientes/etiología
3.
Oper Dent ; 44(1): 54-64, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-29856701

RESUMEN

This study aimed to evaluate the effect of repolishing after bleaching on color stability and smoothness of two resin composites aged in a high-staining beverage. Fifty-six disc-shaped specimens (8×2 mm) of each resin composite were fabricated (Filtek Z250, 3M ESPE, microhybrid, and Filtek Z350 XT, 3M ESPE, nanofilled) and then divided according to treatment: bleached or nonbleached. After treatment application, groups were subdivided according to the surface treatment: repolished or unrepolished. A new subdivision was performed according to aging conditions: immersion in red wine for 15 min/d or in artificial saliva for 24 h/d during 30 days. Color (CIE L*a*b* system) and roughness (Ra) were assessed at baseline (P0), after bleaching procedures (P1), after surface treatment (P2), and after aging (P3). Color change (ΔE00) was calculated through the CIEDE2000 formula. Statistical analysis was performed using repeated measures analysis of variance and the Tukey post hoc test. Bleached repolished groups presented lower color alteration than the bleached unrepolished groups from both resin composites when aged in red wine. Repolishing (P1 vs P2) promoted a slight decrease in roughness values of almost all groups. Nanofilled composite presented greater ΔE00 values than microhybrid composite when aged in red wine.


Asunto(s)
Resinas Compuestas/química , Materiales Dentales/química , Pulido Dental/métodos , Blanqueadores Dentales/química , Blanqueamiento de Dientes , Decoloración de Dientes/tratamiento farmacológico , Decoloración de Dientes/etiología , Peróxido de Hidrógeno/química , Técnicas In Vitro , Ensayo de Materiales , Saliva Artificial , Propiedades de Superficie , Vino
4.
Caries Res ; 53(1): 24-32, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-29874642

RESUMEN

OBJECTIVES: To investigate whether silver diamine fluoride (SDF) is effective in preventing new caries lesions in primary teeth when compared to placebo or active treatments. METHODS: Systematic review (CRD42016036963) of controlled clinical trials. Searches were performed in 9 electronic databases, 5 registers of ongoing trials, and reference lists of identified review articles. Two researchers carried out data extraction and quality appraisal independently. The primary outcome was the difference in caries increment (decayed, missing, and filled surfaces or teeth - dmfs or dmft) between SDF and control groups. These differences were pooled as weighted mean differences (WMD) and prevented fractions (PF). RESULTS: Searches yielded 2,366 unique records; 6 reports of 4 trials that randomized 1,118 and analyzed 915 participants were included. Two trials compared SDF to no treatment, 1 compared SDF to placebo and sodium fluoride varnish (FV), and 1 compared SDF to high-viscosity glass ionomer cement (GIC). All studies had at least 1 domain with unclear or high risk of bias. After 24 months of follow-up, in comparison to placebo, no treatment, and FV, SDF applications significantly reduced the development of new dentin caries lesions (placebo or no treatment: WMD = -1.15, PF = 77.5%; FV: WMD = -0.43, PF = 54.0%). GIC was more effective than SDF after 12 months of follow-up but the difference between them was not statistically significant (WMD, dmft: 0.34, PF: -6.09%). CONCLUSION: When applied to caries lesions in primary teeth, SDF compared to no treatment, placebo or FV appears to effectively prevent dental caries in the entire dentition. However, trials specifically designed to assess this outcome are needed.


Asunto(s)
Cariostáticos/uso terapéutico , Caries Dental/tratamiento farmacológico , Caries Dental/prevención & control , Compuestos de Amonio Cuaternario/uso terapéutico , Compuestos de Plata/uso terapéutico , Diente Primario/fisiología , Cariostáticos/efectos adversos , Niño , Preescolar , Ensayos Clínicos Controlados como Asunto , Fluoruros Tópicos/efectos adversos , Fluoruros Tópicos/uso terapéutico , Estudios de Seguimiento , Cementos de Ionómero Vitreo/efectos adversos , Cementos de Ionómero Vitreo/uso terapéutico , Humanos , Inflamación/etiología , Compuestos de Amonio Cuaternario/efectos adversos , Compuestos de Plata/efectos adversos , Fluoruro de Sodio/efectos adversos , Fluoruro de Sodio/uso terapéutico , Trastornos del Gusto/etiología , Decoloración de Dientes/etiología
5.
Beijing Da Xue Xue Bao Yi Xue Ban ; 50(6): 1083-1087, 2018 Dec 18.
Artículo en Chino | MEDLINE | ID: mdl-30562786

RESUMEN

OBJECTIVE: To determine the optimum staining condition of tea solutions on bovine incisors in vitro, by comparing the color stability of tooth surface of different concentrations of tea solutions and methods on bovine incisors in vitro. METHODS: Twenty bovine incisors with color surface A1 were chosen, then randomly divided into 4 groups (n=10). Group 1: soaked with 2% tea solution continuously for 6 days; group 2: soaked with 2% tea solution for 6 days, but changed fresh tea solution everyday; group 3: soaked with 1% tea solution continuously for 6 days; group 4: soaked with 1% tea solution for 6 days but fresh tea solution changed every day. After 6 days of staining, the surface color (Δ E value) of all the samples were measured with crystal eye. After brushing 30 times with toothbrushes, the color of bovine incisors were measured again. Then the samples were soaked in artificial saliva at 37 ° C, and Δ E value was measured for 14 days. RESULTS: After staining for 6 days, the Δ E values of the 2% tea solution groups were better than those of the 1% groups (20.21 vs. 16.44, 24.09 vs. 19.22, P<0.05); the groups with the same tea solution concentration, a better result was observed for the group soaked with daily fresh tea solution than for the group that experienced continuous staining (24.09 vs. 20.21, 19.22 vs. 16.44, P<0.05). Groups 1 and 2 were selected for subsequent brushing experiments. The color of both groups became lighter after brushing, and a better result was observed for the continuous staining group than for the group stained in daily fresh solution (3.06 vs. 9.51, P<0.05). The samples with better coloring effect soaked with 2% tea solution continuously for 6 days were put into artificial saliva for 14 days. There was not any significant change in coloring at the end of the first two days (1.51 vs. 1.51, P>0.05), and the color was visibly lighter after the third day (1.51 vs. 5.89, P<0.05), and no further significant change was observed until the 14th day (5.81 vs.5.89, P>0.05), which was darker coloring than that of the pre-staining group. CONCLUSION: Continuous staining on bovine incisors with 2% tea solution with subsequent soaking in artificial saliva resulted in consistent coloring from day 3 to day 14, and this method could be used as an ideal model for teeth staining in vitro.


Asunto(s)
, Decoloración de Dientes , Animales , Bovinos , Color , Incisivo , Ensayo de Materiales , Coloración y Etiquetado , Té/efectos adversos , Decoloración de Dientes/etiología
6.
BMC Oral Health ; 18(1): 209, 2018 12 11.
Artículo en Inglés | MEDLINE | ID: mdl-30538001

RESUMEN

BACKGROUND: A quantitative light-induced fluorescence digital (QLF-D) camera is able to assess demineralizations adjacent to orthodontic brackets. Rotations of teeth during and the presence of the orthodontic appliances may influence the longitudinal follow-up of such lesions over time. METHODS: Brackets were bonded on extracted teeth: 54 incisors and 31 canines. Demineralizations were formed in vitro directly cervical of the bracket. Images were captured using a QLF-D camera mounted on an optical bench, equipped with a goniometer on a turntable. The teeth were placed in the goniometer simulating buccolingual rotation (0°, 10°, 20°), the turn-table was used for mesiodistal rotations (0°, 10°, 20°). Standardized QLF-D images were made before (with and without a wire) and after debonding at combinations of aforementioned angles of rotation. The image after debonding at 0° buccolingual and 0° mesiodistal rotation served as a control. RESULTS: The presence of a bracket resulted in a significantly higher fluorescence loss, yet a smaller lesion area (p < 0.05) in comparison to the control. A significant higher fluorescence loss was seen for rotations towards lingual relative to the 0° buccolingual and 0° mesiodistal rotation, while the effect was less explicit towards buccal. CONCLUSIONS: Fluorescence loss and lesion size are influenced by the angle of rotation under which the demineralization is photographed. The full extent of demineralizations is only apparent after debonding when photographed at rotations of 0° mesiodistal and up to 20° buccal. Precaution must be taken into account assessing demineralizations of patients undergoing treatment with fixed appliances when using a QLF-D camera.


Asunto(s)
Soportes Ortodóncicos/efectos adversos , Decoloración de Dientes/etiología , Humanos , Técnicas In Vitro , Fotografía Dental , Fluorescencia Cuantitativa Inducida por la Luz/métodos , Reproducibilidad de los Resultados , Diente/patología , Decoloración de Dientes/diagnóstico , Decoloración de Dientes/patología
7.
Shanghai Kou Qiang Yi Xue ; 27(3): 257-260, 2018 Jun.
Artículo en Chino | MEDLINE | ID: mdl-30411119

RESUMEN

PURPOSE: The aim of this study was to compare if there was any difference in the enamel discoloration after staining when three orthodontic adhesives and 4 enamel clean-up methods were tested. METHODS: Three types of orthodontic adhesives were used: chemically cured resin, light-cured resin and resin-modified glass-ionomer cement. A total of 120 human extracted premolars were included. Ten teeth of each orthodontic adhesive were randomly cleaned-up with 1 of 4 different procedures and stained in coffee for 7 days: carbide bur (TC), carbide bur and Sof-Lex polishers (TC+SL), carbide bur and One Gloss polishers (TC+OG), carbide bur and PoGo polishers (TC+PG). Colour measurements were made with Crystaleye dental spectrophotometer at baseline and after storage in a coffee solution for 1 week. Two way ANOVA and Bonferroni test were used for statistical analysis with SPSS 13.0 software package. RESULTS: The colour change values of adhesive materials in the TC group were the greatest. The lowest ΔE* values were obtained from the TC+SL group. However, there was no significant difference between the TC+SL and TC+PG group (P>0.05). The resin-modified glass-ionomer cement group showed the lowest colour differences and chemically cured resin group showed the highest ΔE* values among all orthodontic adhesives (P<0.05). CONCLUSIONS: The colour change of enamel surface is affected by the type of adhesive materials and clean-up procedures.


Asunto(s)
Cementos Dentales , Desconsolidación Dental , Esmalte Dental , Decoloración de Dientes , Grabado Ácido Dental , Resinas Acrílicas , Recubrimiento Dental Adhesivo , Cementos de Ionómero Vitreo , Humanos , Ensayo de Materiales , Soportes Ortodóncicos , Distribución Aleatoria , Cementos de Resina , Decoloración de Dientes/etiología , Decoloración de Dientes/terapia
8.
Braz Oral Res ; 32(suppl 1): e75, 2018 Oct 18.
Artículo en Inglés | MEDLINE | ID: mdl-30365616

RESUMEN

Pulp canal obliteration (PCO) is a frequent finding associated with pulpal revascularization after luxation injuries of young permanent teeth. The underlying mechanisms of PCO are still unclear, and no experimental scientific evidence is available, except the results of a single histopathological study. The lack of sound knowledge concerning this process gives rise to controversies, including the most suitable denomination. More than a mere semantic question, the denomination is an important issue, because it reflects the nature of this process, and directly impacts the treatment plan decision. The hypothesis that accelerated dentin deposition is related to the loss of neural control over odontoblastic secretory activity is well accepted, but demands further supportive studies. PCO is seen radiographically as a rapid narrowing of pulp canal space, whereas common clinical features are yellow crown discoloration and a lower or non-response to sensibility tests. Late development of pulp necrosis and periapical disease are rare complications after PCO, rendering prophylactic endodontic intervention useless. Indeed, yellowish or gray crown discoloration may pose a challenge to clinicians, and may demand endodontic intervention to help restore aesthetics. This literature review was conducted to discuss currently available information concerning PCO after traumatic dental injuries (TDI), and was gathered according to three topics: I) physiopathology of PCO after TDI; II) frequency and predictors of pulpal healing induced by PCO; and III) clinical findings related to PCO. Review articles, original studies and case reports were included aiming to support clinical decisions during the follow-up of teeth with PCO, and highlight future research strategies.


Asunto(s)
Cavidad Pulpar/lesiones , Enfermedades de la Pulpa Dental/etiología , Dentición Permanente , Avulsión de Diente/complicaciones , Fracturas de los Dientes/complicaciones , Cavidad Pulpar/diagnóstico por imagen , Cavidad Pulpar/patología , Enfermedades de la Pulpa Dental/patología , Humanos , Radiografía Dental , Avulsión de Diente/diagnóstico por imagen , Avulsión de Diente/patología , Corona del Diente/patología , Decoloración de Dientes/etiología , Fracturas de los Dientes/diagnóstico por imagen , Fracturas de los Dientes/patología
9.
Angle Orthod ; 88(6): 779-784, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30080125

RESUMEN

OBJECTIVES:: To compare the effects of different etching techniques, 12-, 24-bladed tungsten carbide burs, and polishing discs on tooth color changes during orthodontic treatment. MATERIALS AND METHODS:: 59 individuals (mean age: 15.20 ± 1.59 years) were divided into four groups: 37% phosphoric acid and adhesive primer was used in Groups I and II whereas self-etch primer was used in Groups III and IV for enamel preparation. After orthodontic treatment, residual adhesives were cleaned with 12-bladed tungsten carbide burs in Groups I and III, while 24-bladed tungsten carbide burs were used in Groups II and IV. All teeth were polished with medium and fine Sof-Lex XT discs (3M ESPE, St Paul, Minnesota). Color measurements were taken from upper incisors and canines at pretreatment (T0), after cleaning with tungsten carbide burs (T1) and polishing with discs (T2). Wilcoxon test was used for evaluation of L*, a*, b* changes and Kruskal-Wallis for intergroup comparison of color changes. RESULTS:: L*, a*, b* values, except a* at Groups I, II, IV, and b* at Group III, changed significantly ( P < .05). Groups III and IV showed significantly different color alterations from T0 to T1 ( P < .05). After polishing, tooth color alterations were not significantly different among the groups. CONCLUSIONS:: In self-etch bonding groups, a 12-bladed tungsten carbide bur caused less color change than the 24-bladed tungsten carbide bur. Orthodontic treatment resulted with visible and clinically unacceptable tooth color alterations regardless of the enamel preparation and clean-up techniques. Polishing reduced the effect of tungsten carbide burs, but did not affect the total influence of orthodontic treatment on the tooth color.


Asunto(s)
Grabado Ácido Dental/efectos adversos , Desconsolidación Dental/efectos adversos , Decoloración de Dientes/etiología , Adolescente , Color , Cementos Dentales/efectos adversos , Pulido Dental/efectos adversos , Femenino , Humanos , Masculino , Soportes Ortodóncicos/efectos adversos , Estudios Prospectivos , Adulto Joven
10.
Qual Life Res ; 27(12): 3199-3207, 2018 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-30132252

RESUMEN

PURPOSE: Intracoronary bleaching is a minimally invasive, alternative treatment that addresses aesthetic concerns related to non-vital teeth discoloration. However, to the best of our knowledge, no studies have assessed the psychosocial impacts of such procedures on patients' aesthetic perceptions. The aim of this study was to evaluate aesthetic perceptions and the psychosocial impact of patients up to 3 months after their teeth had been bleached with hydrogen peroxide (35%) and carbamide peroxide (37%) using the walking bleach technique. METHODS: The patients were randomly divided into two groups according to the bleaching agent used: G1 = hydrogen peroxide 35% (n = 25) and G2 = carbamide peroxide 37% (n = 25). Non-vital bleaching was performed in four sessions. Color was objectively (ΔE) and subjectively (ΔSGU) evaluated. Aesthetic perception and psychosocial factors were evaluated before, 1 week and 1 month after the bleaching using the Oral Health Impact Profile (OHIP) and Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ) questionnaires. RESULTS: The color change (ΔE) values at 1 month were G1 = 16.80 ± 6.07 and G2 = 14.09 ± 4.83. These values remained stable until the third month after treatment (p > 0.05). There was a decrease in the values of OHIP-aesthetics and PIDAQ after treatment versus baseline (p < 0.05). This status was maintained through the third month after treatment. CONCLUSIONS: Both agents were highly effective and had a positive impact on the aesthetic perception and psychosocial impact of patients, values that also remained stable over time. Non-vital bleaching yields positive and stable impacts on aesthetic perception and psychosocial factors. ClinicalTrials.gov identifier NCT02718183.


Asunto(s)
Estética Dental/psicología , Calidad de Vida/psicología , Blanqueadores Dentales/uso terapéutico , Blanqueamiento de Dientes/métodos , Decoloración de Dientes/etiología , Adulto , Femenino , Humanos , Masculino , Encuestas y Cuestionarios , Blanqueadores Dentales/administración & dosificación
11.
Am J Orthod Dentofacial Orthop ; 154(2): 213-220, 2018 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-30075923

RESUMEN

INTRODUCTION: The aim of this study was the long-term follow-up of enamel color changes observed in the middle third of buccal tooth surfaces after treatment with fixed orthodontic appliances. METHODS: The study included 120 maxillary central and lateral incisors and canines of 20 subjects who had fixed orthodontic treatment. The Spectro Shade Micro device (MHT, Verona, Italy) was used to evaluate the color changes of the teeth. Measurements were made from the middle third of the buccal surfaces of the teeth after fixed orthodontic treatment and in month 3, month 6, and year 1 of the retention phase. The Commission Internationale de l'Echairage L* a* b* system that expresses the color coordinates in L*, a*, and b* symbols was used to determine the tooth color, and ΔE values between the time periods were calculated. Repeated measurement analysis of variance was used in evaluating the color changes. RESULTS: The increases in ΔL values at 3 months, 6 months, and 1 year after treatment were statistically significant, whereas they were not statistically significant from months 3 to 6, month 3 to year 1, or month 6 to year 1. The decrease in Δa and the increase in Δb values were not statistically significant. ΔE values at all time periods were statistically significant within themselves, and the greatest change was observed 1 year after treatment. ΔE values were 1.52 to 3.57, and a visible but clinically acceptable color change occurred. CONCLUSIONS: In the first 3 months, there was a significant increase in the lightness of the tooth color.


Asunto(s)
Esmalte Dental , Aparatos Ortodóncicos/efectos adversos , Decoloración de Dientes/etiología , Adolescente , Estudios de Seguimiento , Humanos , Factores de Tiempo
12.
Int J Esthet Dent ; 13(3): 302-317, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30073215

RESUMEN

In the case of discolored devitalized anterior teeth, several treatments are available to enhance the esthetic outcome, from noninvasive external/internal bleaching to freehand resin composites and more complex prosthetic solutions such as veneers or full crowns. Innovative computer-aided design/computer-aided manufacturing (CAD/CAM) chairside technologies and the introduction of new industrially polymerized composite resin blocks coupled with modern adhesive strategies have reduced both biological and financial costs compared to the classic post-core-crown approach. The aim of this article is to show how these new materials can be used in association with noninvasive internal and external tooth bleaching to restore a discolored, fractured, non-vital central incisor.


Asunto(s)
Restauración Dental Permanente/métodos , Estética Dental , Incisivo , Decoloración de Dientes/terapia , Diente no Vital/terapia , Grabado Ácido Dental , Adulto , Resinas Compuestas , Diseño Asistido por Computadora , Humanos , Masculino , Maxilar , Cementos de Resina , Propiedades de Superficie , Blanqueamiento de Dientes , Decoloración de Dientes/etiología
13.
Int J Mol Sci ; 19(5)2018 Apr 29.
Artículo en Inglés | MEDLINE | ID: mdl-29710829

RESUMEN

This study evaluated the effect of Glutathione (GSH) bio-molecule on the reduction of enamel and dentin discoloration after application of 38% silver diammine fluoride solution (SDF). One hundred and twenty bovine teeth specimens were used. The enamel and dentin specimens were divided into three groups: (1) SDF only (control); (2) SDF followed by application of a potassium iodide solution (KI); and (3) SDF mixed with 20% GSH. Half the specimens were exposed to light and the remainder kept in dark conditions (n = 10) Color changes were measured using a spectrophotometer at the following time intervals: before solution application (baseline) and immediately after application, then 3, 6, 24, 48, 72 h, and 7, 10 and 14 days. SEM/EDS analysis was performed on treated enamel and dentin. Statistical analysis was done using a repeated measures ANOVA test. The spectrophotometer results showed that the SDF group exhibited the greatest color changes under both light exposed and dark conditions, while SDF + GSH group was effective in decreasing the color changes in both light and dark conditions. The SDF + KI group showed an insignificant color changes over time. SEM/EDS analysis showed different patterns for the silver crystal formation in each group (SDF, SDF + GSH, and SDF + KI group). It was concluded GSH can effectively minimize color changes after application of SDF, especially on enamel and to a lesser extent on dentin.


Asunto(s)
Glutatión/farmacología , Compuestos de Amonio Cuaternario/efectos adversos , Decoloración de Dientes/tratamiento farmacológico , Animales , Bovinos , Esmalte Dental/efectos de los fármacos , Dentina/efectos de los fármacos , Fluoruros Tópicos , Glutatión/análogos & derivados , Glutatión/uso terapéutico , Compuestos de Plata , Decoloración de Dientes/etiología
14.
Indian J Dent Res ; 29(2): 201-205, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29652015

RESUMEN

Introduction: Resin composite restorative materials can mimic the natural color and shade of the tooth. However, exogenous colorants from food and drinks can stain them due to adsorption. The influence of Indian food colorants and spices on resin composite restorations has not been evaluated extensively. Aim: This study aims to evaluate the staining capacity of microhybrid and nanohybrid resin-based composites, to saffron extract, tandoori powder, and turmeric powder. Subjects and Methods: Forty samples of microhybrid (Kulzer Charisma) and nanohybrid (3M Filtek Z350) resin composites were prepared using an acrylic template of dimension 5 mm × 3 mm. They were randomly divided into four groups and immersed into solutions of saffron extract, tandoori powder, and turmeric powder. Distilled water was used as the control group. Color values (LFNx01, aFNx01, bFNx01) were measured by colorimeter using the CIE LFNx01aFNx01bFNx01 system before and after 72 h of immersion. Color differences ΔEFNx01ab were statistically analyzed. Statistical Analysis Used: Two-way ANOVA and post-hoc Tukey (honest significant difference) test were done using IBM SPSS Statistics for Windows, Version 19.0. Armonk, NY: IBM Corp. Results and Discussion: : All the immersion media changed the color of the resin composites to varying degrees. However, turmeric solution showed the maximum mean color variation ΔEFNx01ab of 14.8 ± 2.57 in microhybrid resin composites and 16.8 ± 3.50 in nanohybrid resin composites. Conclusion: Microhybrid and nanohybrid resin composites tend to stain to Indian food colorants, especially to turmeric powder.


Asunto(s)
Colorantes/metabolismo , Resinas Compuestas/uso terapéutico , Colorantes de Alimentos/efectos adversos , Nanoestructuras/uso terapéutico , Especias/efectos adversos , Color , Resinas Compuestas/metabolismo , Crocus/efectos adversos , Curcuma/efectos adversos , Humanos , Técnicas In Vitro , Decoloración de Dientes/etiología
15.
Av. odontoestomatol ; 34(2): 59-71, mar.-abr. 2018. tab
Artículo en Español | IBECS | ID: ibc-172659

RESUMEN

El color del órgano dental viene determinado desde el nacimiento, estando determinado por la tonalidad de la dentina aunada a la transparencia y capacidad de refracción de la luz del esmalte. Las descoloraciones den tales son un cambio en el tono, chroma, valor o en la translucidez del diente, puesto que el tejido adamantino es permeable, poco a poco se va tiñendo a causa de diferentes factores externos como pueden ser pigmentos (cromóforos) contenidos en alimentos o bebidas como los tomates, zanahorias, café, té o infusiones varias, que tienden adherirse a los tejidos orgánicos que ocupan los espacios interprismáticos mediante unión química a sus grupos hidroxilo y amino. Además la unión entre estas sustancias pigmentadas y los iones calcio forma nuevas moléculas que varían en tamaño y efecto óptico. Por otro lado numerosos estudios confirman que el tabaco es otro de los factores que alteran el color natural de los dientes, ya sea en cigarrillo, puros, pipa y aún no existe suficiente evidencia sobre el vapor de tabaco. El mecanismo de acción para la decoloración por el tabaco es similar al de los alimentos, salvo que en estos casos se trata de la nicotina, el grupo de alquitranes y el furufral, los cuales se depositan en la superficie dental o incluso llegan a penetrar en los túbulos dentinarios, siendo muy difícil su eliminación. Este tipo de decoloraciones se denominan extrínsecas. Técnicas de blanqueamiento en diferentes formas de aplicación, tiempo, compuestos y su concentración, han demostrado ser suficientes, aunque sin una suficiente evidencia clara y concisa, como vía de mejora del color del diente y lo que esto acarrea


The use of dental implants has become a routine treatment in the clinic. An important prerequisite to ensure proper bone-implant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lastinsthetics and dental implants is essential a firm and lasting cant interface cess in prosthetics and dental implants is essential a firm and lasting cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting tal implants is essential a firm and lasting connecg cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting cant interface cess in prosthetics and dental implants is essential a firm and lasting cant interface is adequate primary implant stability during healing. For clinical success in prosthetics and dental implants is essential a firm and lasting tal implants is essential a firm and lasting connection to the implant surface and bone. These surfaces can be modified using coatings, different abrasive blasting, or acid treatments, combination of several or all of them


Asunto(s)
Humanos , Blanqueamiento de Dientes/métodos , Blanqueadores Dentales/análisis , Decoloración de Dientes/terapia , Decoloración de Dientes/etiología , Nicotina/efectos adversos , Furaldehído/efectos adversos , Peróxido de Hidrógeno/uso terapéutico
16.
J Dent Res ; 97(8): 954-961, 2018 07.
Artículo en Inglés | MEDLINE | ID: mdl-29513607

RESUMEN

In developing teeth, the sequential and reciprocal interactions between epithelial and mesenchymal tissues promote stem/progenitor cell differentiation. However, the origin of the stem/progenitor cells has been the subject of considerable debate. According to recent studies, mesenchymal stem cells originate from periarterial cells and are regulated by neurons in various organs. The present study examined the role of innervation in tooth development and rodent incisor stem/progenitor cell homeostasis. Rodent incisors continuously grow throughout their lives, and the lower incisors are innervated by the inferior alveolar nerve (IAN). In this study, we resected the IAN in adult rats, and the intact contralateral side served as a nonsurgical control. Sham control rats received the same treatment as the resected rats, except for the resection process. The extent of incisor eruption was measured, and both mesenchymal and epithelial stem/progenitor cells were visualized and compared between the IAN-resected and sham-operated groups. One week after surgery, the IAN-resected incisors exhibited a chalky consistency, and the eruption rate was decreased. Micro-computed tomography and histological analyses performed 4 wk after surgery revealed osteodentin formation, disorganized ameloblast layers, and reduced enamel thickness in the IAN-resected incisors. Immunohistochemical analysis revealed a reduction in the CD90- and LRIG1-positive mesenchymal cell ratio in the IAN-resected incisors. However, the p40-positive epithelial stem/progenitor cell ratio was comparable between the 2 groups. Thus, mesenchymal stem/progenitor cell homeostasis is more related to IAN innervation than to epithelial stem/progenitor cells. Furthermore, sensory nerve innervation influences subsequent incisor growth and formation.


Asunto(s)
Incisivo/citología , Incisivo/inervación , Nervio Mandibular/fisiología , Células Madre Mesenquimatosas/fisiología , Odontogénesis/fisiología , Animales , Biomarcadores/análisis , Desnervación , Inmunohistoquímica , Incisivo/diagnóstico por imagen , Masculino , Nervio Mandibular/cirugía , Microscopía Fluorescente , Ratas , Ratas Sprague-Dawley , Decoloración de Dientes/etiología , Erupción Dental/fisiología , Microtomografía por Rayos X
17.
J Orofac Orthop ; 79(2): 73-82, 2018 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-29464290

RESUMEN

OBJECTIVES: Aim of this systematic review was to assess the effect of orthodontic treatment with fixed appliances on the tooth color of patients. METHODS: Nine databases were searched up to May 2017 for clinical cohort studies on the effect of fixed appliance treatment on tooth color. After elimination of duplicate studies, data extraction, and risk of bias assessment according to the Cochrane guidelines, random effects meta-analyses of mean differences (MD) or means and their 95% confidence intervals (CIs) were performed, followed by GRADE (Grading of Recommendations Assessment, Development and Evaluation) assessment of the quality of evidence. RESULTS: Three nonrandomized and one randomized study with a total of 138 patients (46% male, 54% female) with average age of 15.7 years were included. Tooth color of treated patients was significantly altered during or after orthodontic treatment (4 studies; average of 3.2 ∆E units; 95% CI = 2.0-4.4 ∆E units), which was more than the variation among controls (1 study; MD = 1.9 ∆E units; 95% CI = 1.7-2.2 ∆E units). However, the quality of evidence was very low, due to the inclusion of nonrandomized studies, bias, and imprecision. Re-analysis of raw study data indicated that significant differences in clinically discernable treatment-induced color changes were seen between chemically and light-cured adhesives and among the various tooth categories. CONCLUSION: Existing evidence of very low quality indicates that orthodontic treatment might be associated with alterations of tooth color, which are however not consistently clinically discernible. Treatment-induced color alterations might be dependent on bonding material and tooth type, but evidence supporting this is weak.


Asunto(s)
Aparatos Ortodóncicos Fijos/efectos adversos , Ortodoncia Correctiva/efectos adversos , Decoloración de Dientes/etiología , Adolescente , Recubrimiento Dental Adhesivo/efectos adversos , Femenino , Humanos , Masculino , Factores de Riesgo
18.
Gen Dent ; 65(6): e9-e12, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-29099375

RESUMEN

Polishing techniques are known to enhance the longevity and appearance of composite resin restorations. However, the influence of the timing of polishing on the final results of a restoration is not well documented. The aim of this study was to determine the effect of immediate and delayed polishing on the color stability of a composite resin. Sixty composite resin specimens were fabricated and randomly divided into 2 groups according to immersion solutions: group 1, deionized water (control); and group 2, coffee (as staining solution). The groups were further divided according to polishing time periods (immediate, 1 day, 7 days, 14 days, and 21 days). The polishing was performed by 1 calibrated operator using a sequence of aluminum oxide discs with different granulations. Color measurements were assessed at baseline and after a 48-hour immersion in the assigned medium by a reflection spectrophotometer, according to CIE L*a*b* parameters. The data were submitted to an analysis of variance (ANOVA) and the post hoc Tukey test at a significance level of 0.05. The ANOVA showed that the immersion solutions had a statistically significant difference (α = 0.05) on color stability. The composite resin color stability was not influenced by the timing of polishing, and all subgroups showed clinically unacceptable discoloration after exposure to coffee. Thus, with regard to color stability, the timing of final polishing may be established according to the preferences of the clinician.


Asunto(s)
Color , Resinas Compuestas/química , Materiales Dentales/química , Pulido Dental/métodos , Restauración Dental Permanente , Decoloración de Dientes/etiología , Óxido de Aluminio , Café , Humanos , Ensayo de Materiales , Distribución Aleatoria , Espectrofotometría , Propiedades de Superficie
19.
Gen Dent ; 65(5): e5-e10, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-28862595

RESUMEN

Composite resin properties can be affected by contact with gel during bleaching procedures; however, there is no consensus about the effect of this contact on resin susceptibility to color change. This study aimed to evaluate staining susceptibility and surface roughness changes in 2 composite resins (Filtek Z250 XT and Filtek Z350 XT) after application of bleaching peroxides and storage in different media. Forty-two disc-shaped specimens of each composite were made, polished, and divided into 3 groups according to treatment type (35% hydrogen peroxide, 16% carbamide peroxide, or deionized water as a control group). These groups were subdivided into 2 groups according to immersion media (n = 7): deionized water or red wine. Color and average roughness (Ra) measurements were taken 24 hours after specimen preparation (T0), immediately after bleaching procedures (T1), and immediately after aging (staining; T2). Statistical analyses were performed using 2-way analyses of variance for repeated measurements and the Tukey test (P < 0.05). Bleaching resulted in minimal color change (ΔE* < 1) in all groups. Filtek Z350 XT specimens presented greater mean values of color change. The Ra values did not increase significantly after bleaching procedures or aging (staining) in all groups. Thus, bleaching agents did not significantly change the color or roughness of the composite resins used in this study.


Asunto(s)
Resinas Compuestas/química , Blanqueadores Dentales/química , Blanqueamiento de Dientes/métodos , Decoloración de Dientes/tratamiento farmacológico , Decoloración de Dientes/etiología , Vino , Peróxido de Carbamida , Geles , Peróxido de Hidrógeno/química , Peróxidos/química , Propiedades de Superficie , Urea/análogos & derivados , Urea/química
20.
J Indian Soc Pedod Prev Dent ; 35(3): 260-268, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-28762354

RESUMEN

CONTEXT: Dental fluorosis is caused by successive exposure to high concentrations of fluoride during tooth development leading to enamel with lower mineral content and increased porosity. AIMS: The aim of the study was to evaluate and compare the effectiveness of minimally invasive techniques for the removal of dental fluorosis stains in children in vivo. DESIGN: Ninety children in the age group of 10-17 years were selected. MATERIALS AND METHODS: The study sample was equally and randomly divided into three groups; Group 1: In-office bleaching with 35% hydrogen peroxide (HP) activated by light-emitting diode (LED) bleaching unit (35% HP), Group 2: Enamel microabrasion (EM) followed by in-office bleaching with 44% carbamide peroxide gel (EM), Group 3: In-office bleaching with 5% sodium hypochlorite (5% NaOCl). Statistical analysis was done using one-way ANOVA test. RESULTS: Bleaching with 35% HP activated by LED bleaching unit and EM followed by bleaching with 44% carbamide peroxide were equally effective for the removal of dental fluorosis stains in children in vivo. However, bleaching with 5% NaOCl could not completely remove moderate to severe stains. It was effective in removing only mild stains. Bleaching and microabrasion procedures caused slight decrease in tooth sensitivity readings by electric pulp vitality tester which continued to increase over time. However, none of the patients reported sensitivity in their teeth at any point of time. Patients were highly satisfied with the treatment outcome postoperatively but reported slight relapse of color in the three groups. CONCLUSIONS: Bleaching and microabrasion techniques can consider as an interesting alternatives to conventional operative treatment options.


Asunto(s)
Microabrasión del Esmalte/métodos , Fluorosis Dental/terapia , Blanqueadores Dentales/farmacología , Blanqueamiento de Dientes/métodos , Decoloración de Dientes/terapia , Adolescente , Peróxido de Carbamida , Niño , Femenino , Humanos , Peróxido de Hidrógeno/farmacología , India , Masculino , Satisfacción del Paciente , Peróxidos/farmacología , Hipoclorito de Sodio/farmacología , Decoloración de Dientes/etiología , Resultado del Tratamiento , Urea/análogos & derivados , Urea/farmacología
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