Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Introduction: Light curing lamps that use light-emitting diodes (LED) are used in dentistry for the polymeric conversion of dental restorative materials. It has been reported that inadequate light intensity in the lamp would not ensure the appropriate polymerization of restorative materials.Objective: Determine the output intensity of LED light curing units used in dental offices of the city of Piura, Peru, in the year 2020.Methods: An observational descriptive study was conducted. Measurements were taken of the light output of 70 LED light curing lamps using a radiometer with a wavelength of 400-500 nm and a light intensity measurement capacity of up to 3 500 mw/cm2. Intensity below 400 mw/cm2 was recorded as low, from 400 to 800 mw/cm2 as medium, from 800 a 1 200 mw/cm2 as high and above 1 200 mw/cm2 as very high.Results: Intensity was medium in 48.5% of the lamps analyzed, high in 22.86%, low in 15.71% and very high in 12.86%. A lower frequency of lamps with greater clinical use was reported.Conclusions: The LED light curing lamps used in dental offices of the province of Piura during the year 2020 emit an average output intensity of 778.14 mW/cm2, which corresponds to medium intensity.

Introduction: Transverse discrepancy of the arches is a skeletal problem not sufficiently studied in persons requiring surgical orthodontic treatment.Objective: Characterize patients with negative transverse maxillary discrepancy requiring surgical orthognathic surgery.Methods: A descriptive cross-sectional study was conducted of 25 medical records of patients attending the maxillofacial surgery service at Hermanos Ameijeiras Clinical Surgical Hospital with negative transverse maxillary discrepancy requiring orthognathic surgery from January 2016 to January 2020. The cases were studied with qualitative variables divided into epidemiological, facial features and dental measurements. Analysis was based on statistical charts. The summary measurements used were absolute and relative frequencies.Results: The frequency of negative maxillary discrepancy was 13.3%. White skin patients were more commonly affected (80%). The main concern was aesthetic (68%). Lower third asymmetry and a concave profile were present in 44% and 36% of the cases, respectively. A high frequency was observed of patients with an augmented lower third (76%), posterior crossbite (48%), anterior open bite (75%), lower arch crowding (63.3%) and lower incisor lingualization (72%).Conclusions: Negative transverse maxillary discrepancy is common among patients requiring orthognathic surgery for large aesthetic alterations. White skin patients were found to be more prone to present this disorder.

Introducción: En el ámbito odontológico es muy común el uso de radiografías intraorales, extraorales e incluso de tomografías computarizadas volumétricas. Las radiografías intraorales presentan una baja dosis de radiación en comparación con las tomografías computarizadas volumétricas que pueden emitir una mayor dosis de radiación con cierto grado de riesgo para los pacientes. A pesar de que se conoce sobre la importancia del uso del consentimiento informado y los riesgos durante estos procedimientos, muy poco se ha reportado sobre la utilización del consentimiento informado en radiología oral y maxilofacial.Objetivo: Analizar los beneficios y los retos de usar el consentimiento informado en radiología odontológica.Comentarios principales: Actualmente, no existe un consenso claro en la comunidad odontológica sobre si se debe obtener el consentimiento informado del paciente antes de que se someta a un examen de imagen con radiación ionizante. Su aplicación de manera repetitiva o prolongada podría afectar al paciente a largo plazo.Consideraciones globales: Existe un consenso universal en resaltar la importancia del consentimiento informado en todo el ámbito de la salud. Sin embargo, en la práctica, su realización puede conllevar ciertas dificultades, tales como la identificación del responsable de su realización, el tiempo que lleva ejecutarla y la preocupación por causar un miedo innecesario en el paciente. Si estas dificultades logran ser superadas, podremos ver los beneficios de tener un consenso claro para la utilización de un consentimiento informado en el área odontológica.

Introduction: “Pink teeth” are a post-mortem phenomenon characterized by a rose, reddish and even purple shade of color which may be observed in teeth. Their first reference dates back to 1829, when Thomas Bell described them. They have been a topic of debate for almost two centuries. The subject poses several questions: Would it be more logical to name them “red teeth” or “purple teeth”? What causes the increase in color intensity? Does the pink shade signal a specific cause of death? Does it remain forever or may it disappear for a variety of reasons?Objective: Describe the indicators that “pink teeth” may still be considered an important element in current forensic research.Main remarks: Based on the experience gathered from the cases analyzed in the last 20 years and the bibliographic review conducted, it is evident that the phenomenon appears mainly in anterior teeth and single-rooted premolars. On the other hand, pink teeth may be observed ante mortem as well as post mortem. For a number of reasons, post mortem pink teeth take several days to form, and they are a taphonomic phenomenon, present in violent as well as natural deaths, though their change in tone depends on various factors.General considerations: Founded on the experience obtained by the authors and the bibliography about the topic, it is evident that this sign, phenomenon or finding (upon clarification of the questions posed) may still be very significant and enlightening in the current forensic context.

Introduction: Publishing articles during undergraduate training makes it possible for students to complete the research process and develop skills useful for graduate education.Objective: Describe students' scientific production in dental journals indexed in the SciELO collection during the years 2018 and 2019.Methods: A cross-sectional observational descriptive study was conducted in which articles were the units of analysis. The journals considered were those indexed in the collection when the search was performed and those including articles containing information related to the academic degree of authors. The variables considered were journal name, impact factor, articles with students' participation, year of publication, languages, typologies, topics, number of students per article, authorship types and modes, countries, universities and citations.Results: Nine journals were evaluated, three of which did not contain any article of student authorship. A total 889 articles were published, with students participating in 3.49% of them. The International Journal of Odontostomatology (5.41%) was the journal with the largest number of articles of student authorship. 67.74% of the articles were original. Brazilian and Peruvian student authors published the same number of articles (n = 8). 19.35% of the articles dealt with topics related to maxillofacial surgery. Three articles were affiliated to the Peruvian National University of San Marcos.Conclusions: Students' scientific production is low in dental journals indexed in SciELO, and is mainly composed of original articles.

Introduction: Malocclusion is a problem that affects the development of the dentition and, in most cases, has an environmental determinant.Objective: Determine the environmental factors associated with types of malocclusion in schoolchildren with early mixed dentition.Methods: The sample consisted of 275 schoolchildren who met the selection criteria, with an average age of 8.95 years, 151 boys and 124 girls. The clinical evaluation was carried out by a experienced specialist, the registration of environmental factors was carried out through a structured interview, body mass index and a questionnaire validated for socioeconomic status. For data analysis, SPSS version 25 software was used. Logistic regression analysis was used to evaluate the association of environmental factors with each type of malocclusion, establishing OR with 95% confidence intervals and a significance level of 5%.Results: The habit of mouth breathing showed that it is a factor associated with dental crowding (p = 0.049 < 0.05; OR = 1.723). Overweight protects against alteration of the tooth eruption (p = 0.039 < 0.05; OR = 0.459), compared to schoolchildren with normal nutritional status or malnutrition.Conclusions: It is concluded that there is an association between dental crowding and the habit of mouth breathing, between nutritional status and the alteration of the tooth eruption, being overweight a protective factor. In the other interactions evaluated, no association of another type of malocclusion with any environmental factor was found.

Introducción: El desarrollo de las ciencias médicas trae consigo un incremento en la expectativa de vida, junto a la detección temprana de un gran número de enfermedades crónicas como las cerebrovasculares y cardiovasculares, que son tratadas rutinariamente con medicamentos antiagregantes plaquetarios. El conocimiento del manejo de estos pacientes ante los procedimientos quirúrgicos estomatológicos constituye un reto en la práctica diaria profesional.Objetivo: Determinar el nivel de sangramiento posextracción dentaria en pacientes con enfermedad cardiovascular y cerebrovascular, según el tipo de antiagregantes plaquetarios y grupo dentario, así como la frecuencia de utilización de las medidas para su control.Métodos: Se efectuó un estudio observacional, descriptivo, longitudinal y prospectivo con un universo de 136 pacientes de más de 20 años, remitidos por su cardiólogo y que necesitaban realizarse extracciones dentarias sin modificar su tratamiento con antiagregantes plaquetarios. Las variables estudiadas fueron la enfermedad sistémica, el tipo de antiagregante plaquetario, el nivel de sangramiento, grupo dentario intervenido y método hemostático utilizado. Resultados: La mitad de los pacientes estudiados no presentó sangramiento posextracción dentaria. En los pacientes tratados con aspirina o clopidogrel predominaron los sujetos sin sangramiento para un 84,3 % y 62,5 %, respectivamente. En los de doble antiagregación prevaleció el sangramiento moderado con un 46,3 %. Los grupos dentarios incisivo, canino y premolar no presentaron episodios de sangramiento para un 64,1 %, 51,6 % y 53,3 %, respectivamente. El método hemostático más utilizado fue la compresión de las corticales y termoterapia fría (47,8 %).Conclusiones: La mitad de los pacientes con enfermedades cardiovasculares y cerebrovasculares no presentaron sangramiento posextracción dentaria.

Introduction: Recurrent infections in the root canal system are mainly attributed to the presence of species such as Enterococcus faecalis. It is therefore necessary to study substances other than sodium hypochlorite which may be used as irrigants for the canals, thus improving the success rate of the treatment.Objective: Identify the chemical composition of essential oil from Origanum vulgare L. (oregano) and evaluate its antibacterial activity against E. faecalis ATCC 29212.Methods: An in vitro experimental study was conducted. Origanum vulgare L. was collected from the province of Tarata, Tacna, Peru. The essential oil was obtained by steam entrainment, and a sample was subjected to gas chromatography / mass spectrometry in a QP2010 chromatograph (Ultra Shimadzu) equipped with a DB-5 MS column to identify its constituents. Antibacterial activity of the essential oil was evaluated by the brain heart agar disk diffusion method at concentrations ranging from 2 261 to 27 132 mg/µl. The software EPi InfoTM was used to estimate the repetitions.Additionally, identification was performed of the minimum inhibitory concentration and the minimum bactericidal concentration of the essential oil. The data were subjected to descriptive analysis and one-factor ANOVA was performed to compare the mean values of inhibition haloes at the different concentrations. A significance level of p < 0.05 was established.Results: Twenty constituents were identified. The main compounds were .alpha.-pinene (24.44%) and 1,6-Ocatien-3-ol,3,7,7dimethyl (12.52%). E. Faecalis was very sensitive (++) and extremely sensitive (+++) to concentrations above 15 827 mg/µl of the essential oil of Origanum vulgare L. All the concentrations inhibited bacterial growth, and concentrations above 14 018 mg/µl were bactericidal.Conclusions: The main constituents of the essential oil of Origanum vulgare L. were .alpha.-pinene and cis-.beta.-terpineol. Additionally, the essential oil was shown to display considerable antibacterial activity against Enterococcus faecalis ATCC 29212.

Introduction: The correction of the vertical excess of the maxilla will bring not only vertical changes in the profile, but also sagittal and transverse ones. The clinical absence of posterior crossbite can mask width deficiencies and lead to incorrect treatment plans.Objective: Describe the most important aspects in the care of a case with vertical excess and transverse deficiency of the maxilla without posterior cross bite.Case presentation: A 26-year-old female patient comes to the consultation for "teeth forward". The physical examination and the study of the diagnostic means allowed to conclude the existence of vertical excess and transverse deficiency of the maxilla. Clinically, no posterior crossbite was observed. Staged treatment included orthodontics, expansion and surgical impaction of the maxilla.Conclusions: The surgical ascent of the maxilla should be planned based on a holistic analysis. It includes the sagittal changes of the profile and the transverse relationship between the arcades, caused by the effect of mandibular rotation. The absence of posterior crossbite does not exclude the existence of transverse maxillary deficiency. Likewise, the definitive dimension of the expansion must be established once the lower arcade reaches its definitive dimensions.

Introduction: For the treatment of labial squamous cell carcinoma there are several therapeutic modalities, but surgery is the first choice. Numerous techniques have been described for the management of lesions affecting more than a third of the lower lip. However, the selection of any particular one depends on the fulfillment of the reconstructive principles of this unit.Objective: Exemplify the benefits of using Castañón cheiloplasty for partial lip reconstruction in a patient with squamous cell carcinoma of the lower lip.Case presentation: A 68-year-old male patient with a history of smoking and alcoholism was presented, who went to the Head and Neck Oncological Surgery consultation for presenting a lesion located in vermilion of the lower lip. An incisional biopsy reported moderately differentiated squamous cell carcinoma. It was studied as a T2N0M0, stage II and was treated surgically by subtotal cheilectomy and reconstruction with Castañón technique.Conclusions: The clinical case of a patient with squamous cell carcinoma of the lower lip, a pathological entity of high incidence, was presented. Surgery was the only treatment modality used. Once the surgical resection of the lesion was performed, the defect was reconstructed, for which the cheiloplasty described by Castañón was used, a useful option to achieve compliance with the aesthetic and functional principles.