Alteración en la integridad de la membrana basal en agrandamiento gingival inducido por tratamiento ortodóncico / Alteration of the Basal Membrane Integrity in Orthodontic Treatment-Induced Gingival Enlargement

Introducción: El agrandamiento gingival inducido por tratamiento de ortodoncia es un aumento progresivo, localizado o generalizado del tejido gingival. Objetivo: Determinar aspectos morfológicos en la membrana basal del tejido gingival de pacientes con agrandamiento gingival inducido por tratamiento de ortodoncia. Métodos: Estudio descriptivo de corte transversal, donde se analizaron tejidos gingivales de pacientes con agrandamiento gingival inducido por tratamiento de ortodoncia (grupo test: n=5) e individuos sanos (grupo control: n=5) mediante análisis histológicos e inmunohistoquímico con anticuerpo policlonal anti-citoqueratina 14. Las interrupciones de la membrana basal grado 1 y grado 2 fueron identificadas. Fue utilizado el programa estadístico R versión 4.0.2 para Windows. Se declaró significancia si p <0,05. Resultados: Se constató la presencia de rupturas de la membrana basal en todos los pacientes del grupo test. Estos individuos presentaron una mayor cantidad de cambios morfológicos en el tejido gingival. Exponiendo así, valores estadísticamente significativos de rupturas de la membrana basal (Grado I) y rupturas rodeadas de células epiteliales y/o fibroblastos gingivales (Grado II) en comparación con el grupo control (p <0,001). Conclusión: El tejido epitelial de pacientes con agrandamiento gingival inducido por tratamiento de ortodoncia presenta una evidente pérdida en la integridad de la membrana basal. Estas discontinuidades sugieren un aumento considerable de la plasticidad del epitelio en pacientes con agrandamiento gingival inducido por tratamiento de ortodoncia.

Introduction: Orthodontic treatment-induced gingival enlargement is a progressive, localized or generalized increase in gingival tissue. Objective: To determine morphologic aspects in the basal membrane of the gingival tissue in patients with orthodontic treatment-induced gingival enlargement. Methods: A descriptive and cross-sectional study was carried out, in which gingival tissues of patients with orthodontic treatment-induced gingival enlargement (test group: n=5) and healthy individuals (control group: n=5) were analyzed by histological and immunohistochemical analysis with the polyclonal antibody anticytokeratin 14. Grade 1 and grade 2 disrupted basal membrane were identified. The statistical program R (version 4.0.2) for Windows was used. Significance was declared if p was greater than 0.05. Results: The presence of disrupted basal membranes was observed in all the patients from the test group. These individuals presented a greater number of morphological changes in the gingival tissue. Compared to the control group (p < 0.001), statistically significant values were observed for cases of disrupted basal membrane (grade I) and disruptions surrounded by epithelial cells or gingival fibroblasts (grade II). Conclusion: The epithelial tissue of patients with orthodontic treatment-induced gingival enlargement shows an evident loss of the basal membrane integrity. These discontinuities are suggestive of a considerable increase in epithelial plasticity in patients with orthodontic treatment-induced gingival enlargement.

Enfermedad relacionada a IgG4. Serie clínica de pacientes chilenos / IGG4-related disease. Report of 52 patients

BACKGROUND: IgG4-related disease (IgG4 RD) is an immune-mediated fibro-inflammatory disorder, with tissue infiltration of IgG4+ plasma cells. It causes pseudotumors, tumors, and a wide spectrum of clinical manifestations. AIM: To report the clinical, laboratory, histopathological and treatment characteristics of a group of Chilean patients with IgG4 RD. MATERIAL AND METHODS: Review of medical records of 52 patients aged 18 to 76 years with IgG4 RD seen at six medical centers. RESULTS: Elevated IgG4 serum levels (> 135 mg/dl) were found in 18 of 44 (41%) patients. There was histological confirmation of the disease in 46 patients. The most common sites of involvement were lungs, eyes and kidneys. Eighteen (35%) patients had only one organ involved, 34 (65%) patients had two organs and 13 (25%) patients had three or more organs. The involvement of two organs was significantly more common in men (p < 0.05). In patients with only one organ involvement, the most frequent location was orbital and meningeal. All patients with kidney or lung disease had multiorgan involvement. All patients received corticosteroid therapy, 67% synthetic immunosuppressants, and 16% rituximab. CONCLUSIONS: ER-IgG4 can affect any tissue. Multiorgan involvement was more common in this series, with preference for lungs, eyes and kidneys. An excellent response to steroids is characteristic of the disease, but with a high relapse rate that requires additional immunosuppression.

Granuloma telangiectásico de cavidad oral en zona anterior

Introducción: El granuloma telangiectásico es una neoplasia benigna de origen epitelial y contenido vascular que se presenta en cavidad oral, de crecimiento lento. Su etiología es atribuible a trauma físico, alteraciones hormonales y al uso de medicamentos, además es inducido por presencia de cálculos y deficiente higiene oral. Objetivo: Describir las características clínicas y patológicas de un granuloma telangiectásico presente en cavidad oral, su patogénesis y el manejo de terapéutico del caso. Presentación del caso: Paciente de 35 años que acude a consulta por presentar una lesión tumoral, en sector anterosuperior derecho, afectando la estética de la paciente. Se efectuó excisión quirúrgica y al realizar el estudio histopatológico se confirmó diagnóstico de granuloma telangiectásico. Conclusión: Los profesionales de la odontología deben conocer todos los aspectos relacionados con el granuloma telangiectásico, etiopatogenia, características clínicas e histológicas, con el objeto de identificar esta patología, establecer diagnósticos diferenciales y poder brindar un diagnóstico adecuado y, por consiguiente, un plan de tratamiento específico para cada caso.

Introduction: The granuloma telangiectásico is a benign neoplasia of epithelial origin and vascular content that occurs in oral cavity with greater predilection in gum, of slow growth. Its etiology is attributable to physical trauma, hormonal alterations and the use of medicines, and is induced by the presence of stones and poor oral hygiene. Objective: to describe the clinical and pathological characteristics of a telangiectatic granuloma present in oral cavity, its pathogenesis and the therapeutic management of the case. Presentation of the case: A 35-year-old patient who attended a dental consultation for presenting a tumor lesion of a soft consistency, located in the right anterior superior sector, affecting the aesthetics of the patient. Surgical excision was performed, detoxification of the exposed area with citric acid, and the histopathological study confirmed the diagnosis of telangiectatic granuloma. Conclusion: Dental professionals must know all the aspects related to telangiectatic granuloma, etiopathogenesis, clinical and histological characteristics, in order to identify this pathology, establish differential diagnoses and be able to provide an adequate diagnosis and therefore a specific treatment plan for each case.

Impact of a virtual learning environment on the conscious prescription of antibiotics among Colombian dentists.

Appropriate antibiotic prescription contributes to reducing bacterial resistance; therefore, it is critical to provide training regarding this challenge. The objective of this study was to develop a virtual learning environment for antibiotic prescription and to determine its impact on dentists' awareness, attitudes, and intention to practice. First, the learning content on multimedia resources was developed and distributed into three challenges that participants had to overcome. Then, a quasi-experimental study was performed in which the virtual learning environment was implemented on dentists from seven Colombian cities. The median of correct answers and the levels of awareness, attitudes, and intention to practice were compared before, immediately after, and 6-months post-intervention. Wilcoxon signed-rank and McNemar's tests were used to determine the differences. A total of 206 participants who finished the virtual learning environment activities exhibited a favorable and statistically significant impact on the median of correct answers of awareness (p < 0.001), attitudes (p < 0.001), and intention to practice (p = 0.042). A significant increase occurred in the number of participants with a high level of awareness (p < 0.001) and a non-significant increase in participants with high levels of attitudes (p = 0.230) and intention to practice (p = 0.286). At 6 months, the positive effect on the median of correct answers on awareness and intention to practice persisted (p < 0.001); however, this was not evident for attitudes (p = 0.105). Moreover, there was a significant decrease in the number of participants who showed low levels of awareness (p = 0.019) and a slight increase in those with high levels of the same component (p = 0.161). The use of a virtual learning environment designed for dentists contributed to a rapid improvement in awareness and intention to practice antibiotic prescription; however, their attitudes and information retention need reinforcement.

[IGG4-related disease. Report of 52 patients]. / Enfermedad relacionada a IgG4. Serie clínica de pacientes chilenos.

BACKGROUND: IgG4-related disease (IgG4 RD) is an immune-mediated fibro-inflammatory disorder, with tissue infiltration of IgG4+ plasma cells. It causes pseudotumors, tumors, and a wide spectrum of clinical manifestations. AIM: To report the clinical, laboratory, histopathological and treatment characteristics of a group of Chilean patients with IgG4 RD. MATERIAL AND METHODS: Review of medical records of 52 patients aged 18 to 76 years with IgG4 RD seen at six medical centers. RESULTS: Elevated IgG4 serum levels (> 135 mg/dl) were found in 18 of 44 (41%) patients. There was histological confirmation of the disease in 46 patients. The most common sites of involvement were lungs, eyes and kidneys. Eighteen (35%) patients had only one organ involved, 34 (65%) patients had two organs and 13 (25%) patients had three or more organs. The involvement of two organs was significantly more common in men (p < 0.05). In patients with only one organ involvement, the most frequent location was orbital and meningeal. All patients with kidney or lung disease had multiorgan involvement. All patients received corticosteroid therapy, 67% synthetic immunosuppressants, and 16% rituximab. CONCLUSIONS: ER-IgG4 can affect any tissue. Multiorgan involvement was more common in this series, with preference for lungs, eyes and kidneys. An excellent response to steroids is characteristic of the disease, but with a high relapse rate that requires additional immunosuppression.

New benzimidazolequinones as trypanosomicidal agents.

Herein, the design and synthesis of new 2-phenyl(pyridinyl)benzimidazolequinones and their 5-phenoxy derivatives as potential anti-Trypanosoma cruzi agents are described. The compounds were evaluated in vitro against the epimastigotes and trypomastigote forms of Trypanosoma cruzi. The replacing of a benzene moiety in the naphthoquinone system by an imidazole enhanced the trypanosomicidal activity against Trypanosoma cruzi. Three of the tested compounds (11a-c) showed potent trypanosomicidal activity and compound 11a, with IC50 of 0.65 µM on the trypomastigote form of T. cruzi, proved to be 15 times more active than nifurtimox. Additionally, molecular docking studies indicate that the quinone derivatives 11a-c could have a multitarget profile interacting preferentially with trypanothione reductase and Old Yellow Enzyme.

Dynamical patterning modules and network motifs as joint determinants of development: Lessons from an aggregative bacterium.

Development and evolution are dynamical processes under the continuous control of organismic and environmental factors. Generic physical processes, associated with biological materials and certain genes or molecules, provide a morphological template for the evolution and development of organism forms. Generic dynamical behaviors, associated with recurring network motifs, provide a temporal template for the regulation and coordination of biological processes. The role of generic physical processes and their associated molecules in development is the topic of the dynamical patterning module (DPM) framework. The role of generic dynamical behaviors in biological regulation is studied via the identification of the associated network motifs (NMs). We propose a joint DPM-NM perspective on the emergence and regulation of multicellularity focusing on a multicellular aggregative bacterium, Myxococcus xanthus. Understanding M. xanthus development as a dynamical process embedded in a physical substrate provides novel insights into the interaction between developmental regulatory networks and generic physical processes in the evolutionary transition to multicellularity.

Prescribing antibiotics by dentists in Colombia: Toward a conscientious prescription.

OBJECTIVES: Inappropriate prescription of antibiotics contributes to antibiotic resistance. Therefore, the objective of this study was to determine the awareness, attitudes, and intention to practice of dentists prescribing antibiotics in Colombia in order to design a virtual learning environment on this subject. METHODS: In a descriptive study across seven cities, 700 dentists from different Colombian cities were requested to complete a validated questionnaire containing five sections: general information, awareness on antibiotic effectiveness and antibiotic resistance, attitudes regarding prescription decision, intention to practice concerning clinical cases, and complementary information. The level of awareness, attitudes, and intention to practice was determined and Chi-square test was used to determine the existence of significant differences among cities. RESULTS: The majority of dentists showed a medium level regarding the number of correct answers on awareness (62.4 percent) and attitudes (88.7 percent) and a high level on intention to practice (91.7 percent). Common errors within the awareness section included the meaning of the term "antibiotic resistance" (35 percent) and most dentists were not convinced that such resistance could be derived from prescription of antibiotics (51.2 percent). In the attitudes section, only 45 percent declared that they prescribe antibiotics based mainly on symptoms, and the intention to practice section showed a significant percentage of unnecessary prescription (51 percent for pacemaker users) or absence of prescription (53.9 percent for ventricular septal defect) in antibiotic prophylaxis for infectious endocarditis (IE). CONCLUSION: The dentists interviewed should be trained and made aware of antibiotic resistance, microbiological and clinical foundations, and current antibiotic prophylaxis guidelines.

Cervical Cancer Screening with Human Papillomavirus Self-Sampling Among Transgender Men in El Salvador.

Purpose: Sexual and gender minority persons in low-income countries have very limited access to routine health services. This study evaluated the feasibility of using a self-sampled human papillomavirus (HPV) test to increase access to screening for cervical cancer among transgender men in El Salvador. Methods: We partnered with a local advocacy organization for recruitment. A total of 24 transgender men (men assigned female at birth) ages 19-55 were enrolled and provided consent. Questionnaires assessed sociodemographics, health and sexual histories, and knowledge about HPV and cervical cancer. Screening was performed with a self-sampled HPV test. Participants with a positive test were offered colposcopy and cryotherapy treatment, if appropriate. Those with a negative test were advised to return in 5 years for rescreening. Results: Out of 24 consenting participants, 23 (95.83%) agreed to conduct HPV self-sampling, and 22/23 (95.65%) expressed willingness to self-sample in the future. Among self-sampled individuals, 3/23 (13%) tested positive and accepted colposcopy and biopsy. Analyses of biopsied tissue revealed one case of cervical intraepithelial neoplasia grade 1. Conclusion: HPV self-sampling and subsequent procedures were accepted by the majority of participants. This screening method may be a viable alternative to cytology among transgender men in El Salvador.

Dynamic Buffering of Extracellular Chemokine by a Dedicated Scavenger Pathway Enables Robust Adaptation during Directed Tissue Migration.

How tissues migrate robustly through changing guidance landscapes is poorly understood. Here, quantitative imaging is combined with inducible perturbation experiments to investigate the mechanisms that ensure robust tissue migration in vivo. We show that tissues exposed to acute "chemokine floods" halt transiently before they perfectly adapt, i.e., return to the baseline migration behavior in the continued presence of elevated chemokine levels. A chemokine-triggered phosphorylation of the atypical chemokine receptor Cxcr7b reroutes it from constitutive ubiquitination-regulated degradation to plasma membrane recycling, thus coupling scavenging capacity to extracellular chemokine levels. Finally, tissues expressing phosphorylation-deficient Cxcr7b migrate normally in the presence of physiological chemokine levels but show delayed recovery when challenged with elevated chemokine concentrations. This work establishes that adaptation to chemokine fluctuations can be "outsourced" from canonical GPCR signaling to an autonomously acting scavenger receptor that both senses and dynamically buffers chemokine levels to increase the robustness of tissue migration.

Polarity during tissue repair, a multiscale problem.

Tissue repair is essential for all organisms, as it protects the integrity and function of tissues and prevents infections and diseases. It takes place at multiple scales, from macroscopic to microscopic levels. Most mechanisms driving tissue repair rely on the correct polarisation of collective cell behaviours, such as migration and proliferation, and polarisation of cytoskeletal and junctional components. Furthermore, re-establishment and maintenance of cell polarity are fundamental for a tissue to be fully repaired and for withstanding mechanical stress during homeostasis and repair. Recent evidence highlights an important role for the interplay between cell polarity and tissue mechanics that are critical in tissue repair.

Presencia de lesiones orales en pacientes con afecciones psicológicas, atendidos en una institución de salud / Presence of oral lesions in a group of patients with psychological disorders attending a health institution

Introducción: El liquen plano oral, la estomatitis aftosa recurrente y el síndrome boca urente constituyen entidades patológicas bucales que presentan relación con afecciones psicológicas. Objetivo: Describir la presencia de liquen plano oral, estomatitis aftosa recurrente y síndrome de boca urente en pacientes con afecciones psicológicas atendidos en una institución de salud. Métodos: Se realizó un estudio descriptivo de corte transversal, obteniéndose una población de 35 pacientes seleccionados mediante un muestreo no probabilístico por criterio de 26 pacientes aquellos que fueron remitidos del área de psicología (bajo un test de diagnóstico psicológico) al servicio de estomatología, con lesiones orales antes descritas. Bajo la firma de un consentimiento informado fueron tratadas y evolucionadas en un periodo de 16 meses. Se tuvieron en cuenta las consideraciones éticas basadas en la resolución 008430 de 1993, tratado de Helsinki. Resultados: En cuanto a la frecuencia, la lesión bucal que más se presentó fue la estomatitis aftosa recurrente en un 65,3 por ciento, las aftas mayores en un 38,4 por ciento, seguido de un tipo aftas menores en un 26,9 por ciento, entre otras lesiones en menor frecuencia. Los diagnósticos psicológicos evidenciados fueron estrés, depresión y ansiedad, en diferentes proporciones, mostrándose como lesión más frecuente dentro de estas entidades psicológicas, la estomatitis aftosa recurrente. No existió asociación estadística entre las variables orales y las psicológicas por mostrar valores de p >0,005. Conclusiones: Existió la presencia de liquen plano oral, la estomatitis aftosa recurrente y el síndrome boca urente en alteraciones psicológicas como estrés, ansiedad y depresión, con mayor frecuencia la estomatitis aftosa recurrente(AU)

Introduction: Oral lichen planus, recurrent aphthous stomatitis and burning mouth syndrome are oral conditions related to psychological disorders. Objective: Describe the presence of oral lichen planus, recurrent aphthous stomatitis and burning mouth syndrome in patients with psychological disorders attending a health institution. Methods: A descriptive cross-sectional study was conducted of a population of 35 patients, of whom 26 were selected by criterion nonprobability sampling and referred from the psychology service (based on a psychological diagnosis test) to the dental care service due to the presence of the aforementioned oral lesions. Upon granting their informed consent, the patients were treated and followed up for 16 months. Ethical provisions from Resolution 008430 of 1993, the Helsinki Declaration, were complied with. Results: In terms of frequency, the most common oral lesion was recurrent aphthous stomatitis with 65.3 percent. Major aphthas represented 38.4 percent. and aphthas of a minor type 26.9 percent.; other lesions had a lower frequency. The psychological diagnoses achieved were stress, depression and anxiety to various degrees, and the most common lesion for these psychological disorders was recurrent aphthous stomatitis. No statistical association was found between oral and psychological variables, for they showed values of p >0.005. Conclusions: The presence of oral lichen planus, recurrent aphthous stomatitis and burning mouth syndrome was determined in psychological disorders such as stress, anxiety and depression. Of these oral lesions, recurrent aphthous stomatitis was the most common(AU)

Perfil bacteriano del biofilm dental supragingival en niños con dentición temporal y mixta temprana utilizando la técnica de secuenciación de próxima generación (HOMINGS) / Bacterial profile of the supragingival dental biofilm in children with deciduous and early mixed dentition using next generation sequencing (HOMINGS) technique

OBJETIVO: Describir el perfil bacteriano del biofilm supragingival de niños con dentición temporal (NDT) y dentición mixta temprana (NDMT), con la técnica de secuenciación de próxima generación HOMINGS. MÉTODO: Se realizó un estudio descriptivo comparativo con 30 niños de 5 a 7 años de edad sistémicamente sanos de escuelas públicas de Cartagena (Colombia). Todos los participantes estaban libres de caries, según los criterios del Sistema Internacional de Detección y Evaluación de Caries (ICDAS II) y sin experiencia de caries según el índice de dientes cariados, perdidos y obturados (DCPO). Se recolectaron muestras de biofilm supragingival. Se extrajo el ADN bacteriano y se usó para su análisis mediante HOMINGS (identificación de microorganismos orales humanos utilizando secuenciación de próxima generación) basado en la secuenciación de la región V3-V4 del gen 16S rRNA con la plataforma Illumina MiSeq. RESULTADOS: Se identificaron 360 especies específicas y 65 géneros específicos de las sondas: Streptococcus, Actinomyces, Veillonella y Fusobacterium (29,2% del total de ADN bacteriano presente), mientras que en el grupo de dentición mixta temprana se encontraban Streptococcus, Leptotrichia, TM7 y Porphyromonas (24,5% del ADN bacteriano presente). Las especies bacterianas con mayor abundancia relativa en el microbioma oral de biofilm de NDT fueron Streptococcus sanguinis, Rothia aeria, Gemella haemolysans, mientras que en NDMT fueron S. sanguinis, Leptotrichia sp. HOT-417, Leptotrichia sp. HOT-498. El índice de diversidad de Shannon fue 2,77 (DE = 0,26) para NDT y 3,01 (DE = 0,39) para NDMT (p = 0,06). CONCLUSIONES: El análisis del perfil bacteriano del biofilm dental supragingival en niños con NDMT mediante HOMINGS mostró baja diversidad microbiológica tanto en presencia como en abundancia relativa a nivel de género y de especies bacterianas

OBJECTIVE: Tdescribe the bacterial profile of the supragingival biofilm of children with temporary dentition (CTD) and early mixed dentition (CEMD), with the next-generation sequencing (HOMINGS) technique. METHOD: A comparative descriptive study was carried out with 30 systemically healthy children aged between 5 and 7 years old from public schools in Cartagena-Colombia. All participants were caries-free applying the criteria of the International Caries Detection and Assessment System (ICDAS II) and had no caries experience according to the Decayed, Missing and Filled Teeth (DMFT) index. Supragingival biofilm samples were collected. Bacterial DNA was extracted and used for analysis using HOMINGS (Human Oral Microbe Identification using Next-Generation Sequencing) based on the sequencing of the V3-V4 region of the 16S rRNA gene using the Illumina MiSeq platform (V3-V4 primers). RESULTS: A total of 360 species-specific and 65 genus-specific probes were identified. The bacterial genus most predominant in CTD were Streptococcus, Actinomyces, Veillonella and Fusobacterium (29.2% of all bacterial DNA present), while in CEMD the most predominant were Streptococcus, Leptotrichia, TM7 and Porphyromonas (24.5% of all bacterial DNA present). The bacterial species with the highest relative abundance in the oral biofilm microbiome from CTD were Streptococcus sanguinis, Rothia aeria, Gemella haemolysans, while in CEMD they were S. sanguinis, Leptotrichia spp. HOT-417 and Leptotrichia spp. HOT-498. The Shannon diversity index was 2.77 (SD = 0.26) for CTD and 3.01 (SD = 0.39) for CEMD (P = 0.06). CONCLUSIONS: The analysis of the bacterial profile of the supragingival dental biofilm in children with DMFT, by means of HOMINGS showed low microbiological diversity both in presence and in relative abundance in terms of genus as well as bacterial species

Bacterial profile of the supragingival dental biofilm in children with deciduous and early mixed dentition using next generation sequencing (HOMINGS) technique. / Perfil bacteriano del biofilm dental supragingival en niños con dentición temporal y mixta temprana utilizando la técnica de secuenciación de próxima generación (HOMINGS).

OBJECTIVE: Tdescribe the bacterial profile of the supragingival biofilm of children with temporary dentition (CTD) and early mixed dentition (CEMD), with the next-generation sequencing (HOMINGS) technique. METHOD: A comparative descriptive study was carried out with 30 systemically healthy children aged between 5 and 7 years old from public schools in Cartagena-Colombia. All participants were caries-free applying the criteria of the International Caries Detection and Assessment System (ICDAS II) and had no caries experience according to the Decayed, Missing and Filled Teeth (DMFT) index. Supragingival biofilm samples were collected. Bacterial DNA was extracted and used for analysis using HOMINGS (Human Oral Microbe Identification using Next-Generation Sequencing) based on the sequencing of the V3-V4 region of the 16S rRNA gene using the Illumina MiSeq platform (V3-V4 primers). RESULTS: A total of 360 species-specific and 65 genus-specific probes were identified. The bacterial genus most predominant in CTD were Streptococcus, Actinomyces, Veillonella and Fusobacterium (29.2% of all bacterial DNA present), while in CEMD the most predominant were Streptococcus, Leptotrichia, TM7 and Porphyromonas (24.5% of all bacterial DNA present). The bacterial species with the highest relative abundance in the oral biofilm microbiome from CTD were Streptococcus sanguinis, Rothia aeria, Gemella haemolysans, while in CEMD they were S. sanguinis, Leptotrichia spp. HOT-417 and Leptotrichia spp. HOT-498. The Shannon diversity index was 2.77 (SD=0.26) for CTD and 3.01 (SD=0.39) for CEMD (P=0.06). CONCLUSIONS: The analysis of the bacterial profile of the supragingival dental biofilm in children with DMFT, by means of HOMINGS showed low microbiological diversity both in presence and in relative abundance in terms of genus as well as bacterial species.

Uso del laser de baja potencia como coadyuvante en el tratamiento de lesiones periapicales. Revisión sistemática / Use of low power laser as an adjuvant in the treatment of periapical lesions. Systematic review

Resumen Las lesiones periapicales son el resultado de la exposición crónica de la pulpa dental a los microorganismos del medio oral, y afectan progresivamente la región periapical del diente afectado. En la actualidad, el láser de baja potencia (LBP) se emplea como coadyuvante en el tratamiento de este tipo de lesiones, al cual se le atribuyen propiedades analgésicas, antiinflamatorias, bio-estimulantes y promotoras de la respuesta tisular. Este trabajo consistió en revisar sistemáticamente la literatura que evidenciara el uso y la efectividad terapéutica del LBP como coadyuvante en el tratamiento de lesiones periapicales. Para esto se realizó una búsqueda en la base de datos PubMed empleando los termino MeSH [low-level light therapy], [periapical diseases], [endodontics] y [laser therapy]. Tras realizar la búsqueda no se encontró literatura relacionada que demostrara la efectividad del LBP. Sin embargo, cuatro documentos reportaron la utilidad del láser de alta potencia como alterativa terapéutica de primera elección o como coadyuvante de terapéuticas actuales. No se encontró evidencia que sustente el uso del LBP en el tratamiento de lesiones periapicales.

Abstract Periapical lesions result in the chronic exposure of the dental pulp to oral microorganisms that progressively affect the periapical region of the involved tooth. Today, low power laser (LPL) is used as an adjuvant in the treatment of these types of lesions, as it promotes tissue response and because of its analgesic, anti-inflammatory and bio-stimulant properties. The present article consists of a systematic review of the literature that will evidence the effectiveness of low power laser therapy as an adjuvant in the treatment of periapical lesions. A search in the Pubmed database was performed using the MeSH terms [low-level light therapy], [periapical diseases], [endodontics] and [laser therapy]. After the search was performed, no related literature demonstrated the effectiveness of low power laser therapy. However, 4 documents reported the usefulness of high power laser therapy as a first choice alternate therapy or as an adjuvant of actual protocols. No evidence was found that supported the use of low power laser therapy in the treatment of periapical lesions.