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In recent years, there has been an increasing interest in finding a noninvasive method to induce the acceleration of dental movement, methods such as low intensity vibrations, pulsed electromagnetic fields, and low-level laser therapy (LLLT). There have been multiple studies on the efficacy of LLLT in animal models, in vitro and in patients without conclusive results. Objective: Evaluate the state of the art on the use of LLLT to increase the rate of the orthodontic tooth movement to create a concise reference guide of the different laser and protocols available. Materials and Methods: We searched online databases for articles with the keywords LLLT, LLLI, OTM, photobiomodulation. Results: We found conflicting information as to the efficacy of LLLT to accelerate OTM. There is no consensus in the way the irradiation should be performed. Conclusions: The lack of a standardized irradiation protocol makes it hard to compare conflicting results, even in cases where the laser have the same technical specifications.

Introducción: El síndrome de apnea/hipoapnea obstructiva del sueño (SAHOS), genera obstrucción de la vía aérea superior y el Gold standard para su diagnóstico es la polisomnografía (PSG). Objetivo: Esclarecer la relación que existe entre las variables polisomnográficas y la severidad de la enfermedad, para tener más elementos objetivos al determinar el manejo y seguimiento médico. Diseño: Estudio observacional analítico de corte transversal. Metodología: Se analizaron las variables polisomnográficas de 575 pacientes, mediante el software STATA® VE 15.0 y con la prueba Kruskal Wallis se evaluó la relación entre éstas y la severidad. Resultados: La prevalencia de SAHOS en la cohorte fue de 73.04%, a mayor duración media de apnea MAD se encontraron peores datos de SaO2, La media de Ct90 en pacientes sanos fue 2,55%. La MAD en pacientes con SAHOS moderado y severo fue de 21 segundos, El REM IAH, Ct90 y duración máxima de apneas tuvieron buena relación con el IAH. Conclusiones: Los microdespertares, el Ct90, SaO2 mínima, la MAD y Frecuencia cardiaca máxima están relacionados de manera importante con la severidad de la enfermedad. El WASO, la duración mínima de apneas, la vigilia antes del sueño y la Frecuencia cardiaca mínima no están relacionados. Las apneas de larga duración por encima de 18.5 segundos se asociaron significativamente a peores cifras de oxigenación. Los números de microdespertares tienen una relación fuerte con la severidad de la enfermedad y la más fuerte con los datos de peor oxigenación.

Introduction: The treatment established as the gold standard for skeletal deformities of the craniofacial complex is orthodontic treatment combined with orthognathic surgery, to achieve occlusal stability, facial harmony, improved mastication, phonation and breathing. The conventional orthognathic surgery protocol consists of 3 phases: pre-surgical orthodontic treatment, orthognathic surgery and post-surgical orthodontics. Case Report: 18 year old female patient with skeletal class III. She presents occasional pain, crepitation and luxation of the temporomandibular joint, laterognathia. Treatment: Conventional orthognathic surgery of both jaws with unilateral sagittal osteotomy. Results: The objectives of the treatment plan were achieved 1 year and 9 months after starting orthodontic treatment. Conclusion: With a good diagnosis and treatment planning orthodontic - maxillofacial surgery ensures excellent results, as well as bone stability and occlusal harmony post-surgery.

BACKGROUND: In children, the complications of severe acute respiratory syndrome coronavirus 2 infection occur less frequently than in adults but the characteristics of this disease in oncology patients are not well characterized. METHODS: This was a retrospective study in patients younger than 18 years of age with coronavirus disease 2019 (COVID-19) and cancer diagnoses between April and September 2020. Demographic variables, laboratory, and radiologic findings and complications of each case were identified. A descriptive analysis was performed. RESULTS: A total of 33 patients were identified; the median age was 10 years. Fifteen patients (42%) were in chemotherapy at the time of the infection diagnosis, in two patients the chemotherapy protocol was permanently suspended. The most common symptom was fever in 20 patients (60%). Seven patients (21.2%) showed mild pneumonia, four patients (12.1%) severe pneumonia, and three cases (9.0%) were classified as critical. In the evaluated cohort, five patients (15.1%) died, and in two of those, death was caused by COVID-19 infection. CONCLUSIONS: Children with an oncologic disease, the search for COVID cases should be oriented to patients with fever, including febrile neutropenia, the presence of respiratory symptoms, and the search for epidemiologic contact. A higher frequency of complications and mortality attributed to COVID-19, two in pediatric oncohematologic patients was found. Institutional strategies to detect the infection early and lower institutional infection are indicated.