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

This study investigated the shear bond strength (SBS) of a universal adhesive to enamel/dentin; 1) that had undergone radiotherapy (RT) and 2) that were readily restored and had undergone RT. Enamel and dentin surfaces were obtained from 90 intact human molars. They were randomly divided into six groups according to the presence and timing of irradiation (RT0:no radiotherapy/control, RT1:RT before restoration, RT2:RT after restoration groups) and adhesive application modes (etch&rinse/ER, self-etch/SE)(n=15). A universal adhesive and resin composites were applied. The radiotherapy protocol was conducted with 60 Gy. The SBS test was subjected (1mm/min) and failure type analysis was performed. The resin-enamel/dentin interfaces were examined. Data were statistically analyzed. For enamel and dentin, the presence and timing of irradiation did not significantly influence the SBS values (p>0.05). For enamel, significantly higher SBS values were obtained using etch&rinse mode than self-etch mode (p<0.05). The predominant failure was mixed type. Loss of enamel prisms and obliterated irregular dentinal tubules were found for the radiotherapy-treated specimens. Resin tags were clearer in the irradiated enamel treated with ER than SE. Irradiation with different timings did not influence the bond strength to enamel and dentin, negatively. Irrespective of radiotherapy, the etch&rinse mode caused higher bond strength to enamel than self-etch mode.

The objective of this study was to determine the gingival state and presence of red complex bacteria in saliva samples of 12-year-old schoolchildren. A calibrated periodontist evaluated biofilm index (BI) (Silness and Löe, 1964), presence of calculus, and  gingival index (GI) (Silness and Löe, 1967) in sixty two 12-year-old students of Carmen Lyra School. Saliva samples were collected from each student. The DNA of each sample was extracted and amplified by the polymerase chain reaction (PCR) technique, using specific primers. The BI was 1.18. Calculus was present in 40.40% of  the schoolchildren examined; 19.4% was supragingival calculus and 21% both supragingival and subgingival calculus. The GI was 0.97, which according to Silness and Löe is mild gingivitis. Gingivitis was present in 96.8% of the children examined. Regarding the PCR tests: 18 of the samples (31.58%) did not present any of the bacteria analyzed and the remaining 39 samples (68.42%) were positive for at least the presence of red complex bacteria. Within the limitations of this study, it is concluded that the prevalence of gingivitis and calculus is high in the sample examined, and the gingival state observed in the study population, may be related to the presence of red complex bacteria.

This study aimed to investigate self-medication in the COVID-19 outbreak among patients attending the dental clinic of Zanjan University of Medical Sciences. The total number of patients who took part in this research was 306, and they were questioned using a 28-item questionnaire after signing a permission form. SPSS26 was used to gather and analyze the data. There were 196 women and 110 males among the patients.The results showed that the prevalence of self-medication was 53.9%, and a lower educational level was associated with self-medication. The most common problem for self-medicating was toothache, and the most frequent drug was Ibuprofen. The majority of the participants reported that their relatives/friends suggested the drugs to them. The main source of obtaining the drugs was pharmacies. The major reasons for self-medication were the high cost of dental treatments and fear of COVID-19.

Oral fibroma or Fibrous hyperplasia is a benign tumor in oral cavity may be found at any sites of oral mucosa with clinical feature as a single mass, soft, sessile or pedunculated, smooth surface, painless with or without inflammation. Due to clinical presentation variation, the histopathology examination may be necessary to obtain definitive diagnosis especially in unidentified causes. This case report aimed to present oral fibrous hyperplasia cases in oral cavity with unknown causes.  A 50-year-old and 48-year old women complained single mass on anterior palate and left buccal mucosa, pedunculated, slow progress with soft constancy with history of unidentified causes. The excision was taken for the treatment and histopathology examination with clinical diagnosed by fibroma. The wound completely closed after several weeks after treatment. The conclusion of these two cases report showed that the diagnosis of a single mass in oral cavity with unidentified causes need histopathology examination to have final diagnosis.

Is our goal in this paper to discuss the current concepts about bruxism, a topic that has been a matter of discussion on the dental field for many years. Recent International efforts have been made to challenge bruxism old definitions; this has derivate to a consensus and an actual new concept that defines bruxism as a behavior instead of a disorder. As a behavior, it is explained in this review how it can have negative health consequences, can be innocuous and how new research support that bruxism can even be a protective factor.  Different etiological factors are reviewed in this paper as well the influence of external and internal mechanism related to medications, emotional stress, systemic factors, and potential pharmacological pathways. Moreover, it is briefly summarized the role of oral appliances on sleep bruxism. Finally, clinical considerations and recommendation for the dental professional regarding sings that should be notice during the exam are part of this overview.

A new cohort, known as “Generation Z”, is nowadays studying Health Careers. These students were born between 1996 and 2012, and currently at year 2022, have between 18 and 26 years. It is necessary to comprehend their characteristics and behaviors, for a better understanding of how they learn, what do they expect from education and how to improve their academic development and potential. Generation Z is considered as the most diverse, and it requires a closer mentorship from teachers, who must be ready to help students to manage their time and resources efficiently. It is worth mentioning that Gen Z information about their professional performance is still preliminary, because they are currently studying their University programs. Thus, it will be interesting to further analyze the behavior of Generation Z in Dental Education.

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The evidence to characterize oral health during adolescence in Costa Rica is limited. This lack of adequate research makes it difficult to develop appropriate health policies for this subgroup of the population. This is particularly important because adolescence is the period during which good health habits must take root in order to foster good physical and cognitive development. This study aims to determine the prevalence of tooth loss, bleeding on probing and malocclusion in Costa Rican male adolescents at the “Colegio Técnico Profesional San Agustín” (St. Augustine’s Technical High School) located in the province of Cartago. Data was collected from 428 male adolescents aged 12-22 years in a cross-sectional study during 2019. Prevalence of tooth loss was calculated as the number of individuals having lost at least one tooth. The average number of teeth lost by individuals was also recorded. The bleeding on probing was an indicator used as a proxy parameter for monitoring periodontal health where the presence of bleeding on probing and calculus was also recorded. Malocclusion was measured using the Dental Aesthetic Index (DAI). The results showed that the prevalence of tooth loss, bleeding on probing and malocclusion was of 19%, 70.0% and 98%, respectively. It was also found that 81% of the participants had all their teeth, 11% had lost 1 tooth, 8% had lost more than one tooth of which 0.5% had lost more than 5 teeth. Considering a general classification of periodontal problems based on bleeding on probing and presence of calculus, the prevalence of periodontal problems increases to 92%. Regarding the DAI, the category identifying a very severe malocclusion was the most prevalent in the sample (88%). It is alarming the high prevalence of tooth loss, bleeding on probing, and malocclusions in a sample of Costa Rican male adolescents, compared to similar studies in other countries. The overarching conclusion of this study is that oral diseases represent an important health problem that urgently need proper public health action.