Facial and dental alterations according to the breathing pattern

There is controversy in the literature about possible interaction of the respiratory mode with the facial and dental structures. OBJECTIVES: The aim of this study was to perform a longitudinal assessment of the changes in facial and dental structures in Angle's Class II, division 1 malocclusion individuals, divided according to the respiratory pattern (predominantly nasal or mouth), at two distinct moments of craniofacial development. MATERIAL AND METHODS: Pogonium and nose measurements were made on the lateral cephalometric tracings (LS'-Pog', LS'-B', B'-Pog', Pog'-PogTeg', Line NB, Pog-NB, N'-Prn, Prn-NPog, N-Prn-Sn, Prn-Sn-LS). Dental measurements were made on the plaster models (distances between the tips of the canine cusps and the tips of mesial cusps of the first molars) of 40 individuals aged 10 to 14 years (moment 1) and 13 to 16 years (moment 2), 23 being nose breathers (NB) and 17 being predominantly mouth breathers (MB). RESULTS: The Student's-t test and two-way ANOVA with repeated measures were applied to indicate differences between the mean values of these variables according to the moments and/or respiratory mode. CONCLUSIONS: There were alterations in the facial measurements, without interference of the breathing pattern. However, the breathing pattern infuenced dental alterations

Influence of different beverages on the force degradation of intermaxillary elastics: an in vitro study

Objective: The aim of this study was to evaluate in vitro the effects of frequently ingested beverages on force degradation of intermaxillary elastics. Material and Methods: One hundred and eighty 1/4-inch intermaxillary elastics (TP Orthodontics) were immersed into six different beverages: (1) Coca-Cola®; (2) Beer; (3) Orange juice; (4) Red wine; (5) Coffee and (6) artificial saliva (control). The period of immersion was 15 min for the first and second cycles and 30 min for the third to fifth cycles. Tensile forces were read in a tensile testing machine before and after the five immersion cycles. One-way repeated measures ANOVA was used to identify significant differences. Results: Force degradation was seen in all evaluated groups and at all observation periods (

Prevalence of orofacial pain in adults with cleft lip/palate

Objective: Functional disorders in individuals with cleft lip and palate (CL/P) can compromise structures of the stomatognathic system, which is one of the causes of orofacial pain in this group of patients. Numerous mechanisms of orofacial pain, particularly painful temporomandibular disorders (TMD-P), may be related to these conditions and have the potential to be the cause of diffuse. So, the objective of research wasdetermine the prevalence of orofacial pain using validated instruments on individuals with CL/P. Materials and Methods: a observational study was conducted with an intentional random sample of patients with CL/P (n = 80). Two questionnaires were administered: a screening scale for painful TMD (AAOP) and the Graded Chronic Pain Scale (GCPS). Results: In the AAOP screening questionnaire, 75% of individuals with CL / P answered affirmatively to at least one question. The most significant questions were those related to noise (p = 0.007), mandibular movement (p = 0.032) and orofacial pain region (p = 0.044) demonstrated the importance of investigating TMD-P. Regarding the impact of chronic pain in relation to activities of daily living (GCPS), although no significant, it showed that for most individuals with CL / P, it has a low disability, regardless of its intensity (low / high), being more prevalent in older individuals (p = 0.013). Conclusions: the investigation of orofacial pain should be part of the routine at services that work with CL/P patients and should be counseled to seek help for such pain, which can affect their daily living.info:eu-repo/semantics/publishedVersio

Blood contamination effect on shear bond strength of an orthodontic hydrophilic resin

OBJECTIVE: The aim of this study was to assess the impact of blood contamination on shear bond strength (SBS) and bond failure pattern of metallic brackets bonded using a new hydrophilic resin. MATERIAL AND METHODS: Eighty human premolars were randomly allocated into 4 groups (n=20) according to the bonding material and contamination pattern. GI: brackets bonded with the Transbond XT conventional system without contamination; GII: brackets bonded with the Transbond XT conventional system with blood contamination; GIII: brackets bonded with the Transbond Self Etching Primer and Transbond Plus Color without contamination; GIV: brackets bonded with the Transbond Self Etching Primer and Transbond Plus Color with blood contamination. The specimens were stored in distilled water at 37°C for 24 h and then submitted to SBS test at a crosshead speed of 0.5 mm/min. After bond failure, the enamel surfaces were observed under an optical microscope at 40x magnification. RESULTS: Blood contamination decreased (

Eficacia de la desinfección de superfícies inanimadas contra coronavirus: una revisión sistemática

Human coronaviruses tend to persist on dry surfaces for 2 to 9 days, necessitating infection control and prevention protocols using biocidal agents. This systematic review aimed to answer the following focused question: What is the effectiveness of disinfectants on inanimate surfaces against the coronavirus? The acronym “PICOS” was used to represent the eligibility of studies: P = population (inanimate surfaces contaminated with coronavirus); I = intervention (disinfectants); C = comparison (studies with any type of control or studies that used a control group); O = outcomes (coronavirus inactivation on different types of inanimate surfaces); and S = study design (in vitro studies). The seven databases used were PubMed/Medline, EMBASE, Latin American and Caribbean Literature on Health Sciences (LILACS), Web of Science, Scopus, LIVIVO, and Cochrane Library. The gray literature was also used as an information source through Google Scholar, ProQuest, and Open Gray. The search resulted in 6639 references, and 21 articles were used in the qualitative analysis. The results showed that all studied biocidal solutions provided some degree of decontamination and inactivation of the coronavirus, depending on the concentration of the disinfectant solution, the time of exposure of the product to the pathogen and the type of surface.info:eu-repo/semantics/publishedVersio

Tiempo de supervivencia del coronavirus en superficies inanimadas: una revisión sistemática

This systematic review aimed to study the survival time of the virus from the coronavidae family on various materials and surfaces, thus enabling the adoption of preventive measures mainly in public environments. The electronic databases selected as a source of information were PubMed/Medline, Excerpta Medica database (EMBASE), Latin American and Caribbean Literature in Health Sciences (LILACS), Web of Science, Scopus, and LIVIVO; grey literature (Google Scholar, ProQuest, and OpenGrey) was also examined. The last electronic search of the six databases retrieved 4287 references. After removing the duplicate references, the titles and abstracts (phase 1) were read, and 37 articles were selected for complete reading (phase 2), which resulted in 13 included studies. All the studies evaluated coronavirus survival on the following surfaces and objects: stainless steel, glass, plastic, wood, metal, cloth, paper, cotton, latex, polystyrene petri dish, aluminium, copper, cardboard, Teflon, polyvinyl chloride (PVC), silicone rubber and disposable fabric. On surfaces such as glass, plastic, and steel, the virus has greater stability than it does on copper, fabric, paper, and cardboard. The conditions of temperature, relative humidity, absorption power, and texture were also considered important factors in the survival of the virus.info:eu-repo/semantics/publishedVersio

Is there scientific evidence of the mouthwashes effectiveness in reducing viral load in Covid-19? A systematic review

The aim of this research is to verify whether there is evidence in the literature regarding the decrease in viral load present in saliva after using three types of mouthwashes. Clinical and/or in vitro experimental studies that have used mouthwashes a

Impact of the COVID-19 pandemic on facial pain, anxiety, depression, quality of life, and awake bruxism in sleep bruxism patients, occlusal splint users

Introduction: The COVID-19 pandemic may lead to increased risk of developing or worsening bruxism and facial pain. Objective: To evaluate the influence of pandemic on adults with Sleep Bruxism (BS), both sexes, rigid occlusal splint users. Methods: Longitudinal observational study conducted in adults, both sexes, with Possible BS (n= 50), mean age 35.95 ± 10.35 years, before (T1) and during (T2) COVID-19 pandemic, in person and remotely, respectively. Presence and intensity of pain (Visual Analog Scale) in the masseter and temporal muscles and temporomandibular joint (TMJ) region, anxiety and depression (HADS), quality of life (QoL) (WHOQOL - Brief) and Awake Bruxism (AB) were assessed. Student's t- test, Mann-Whitney U-test, Wilcoxon, Pearson's chi-square and Mc-Nemar tests were applied (p<0.05). Results: The frequency of subjects with masseter, temporal and TMJ pain was 72%, 22%, 42% at T1 and 44%, 26%, 60% at T2, respectively; AB was 78% at T1 and 70% at T2. At both times pain intensity was moderate, there was absence of anxiety and depression, and QoL was regular. At T2, the frequency of subjects with masseter pain decreased 28%, domains physical, psychological and QoL mean worsened (p<0.05). The other variables showed no difference between times (p>0.05). Conclusions: During the COVID-19 pandemic, the use of rigid occlusal splints contributed to pain control in masseter muscle; anxiety and depression were absent, QoL worsened, and AB frequency remained high.Introduction: The COVID-19 pandemic may lead to increased risk of developing or worsening bruxism and facial pain. Objective: To evaluate the influence of pandemic on adults with Sleep Bruxism (BS), both sexes, rigid occlusal splint users. Methods: Longitudinal observational study conducted in adults, both sexes, with Possible BS (n= 50), mean age 35.95 ± 10.35 years, before (T1) and during (T2) COVID-19 pandemic, in person and remotely, respectively. Presence and intensity of pain (Visual Analog Scale) in the masseter and temporal muscles and temporomandibular joint (TMJ) region, anxiety and depression (HADS), quality of life (QoL) (WHOQOL - Brief) and Awake Bruxism (AB) were assessed. Student's t- test, Mann-Whitney U-test, Wilcoxon, Pearson's chi-square and Mc-Nemar tests were applied (p<0.05). Results: The frequency of subjects with masseter, temporal and TMJ pain was 72%, 22%, 42% at T1 and 44%, 26%, 60% at T2, respectively; AB was 78% at T1 and 70% at T2. At both times pain intensity was moderate, there was absence of anxiety and depression, and QoL was regular. At T2, the frequency of subjects with masseter pain decreased 28%, domains physical, psychological and QoL mean worsened (p<0.05). The other variables showed no difference between times (p>0.05). Conclusions: During the COVID-19 pandemic, the use of rigid occlusal splints contributed to pain control in masseter muscle; anxiety and depression were absent, QoL worsened, and AB frequency remained high

Influence of different beverages on the force degradation of intermaxillary elastics: an in vitro study

OBJECTIVE: The aim of this study was to evaluate in vitro the effects of frequently ingested beverages on force degradation of intermaxillary elastics. MATERIAL AND METHODS: One hundred and eighty 1/4-inch intermaxillary elastics (TP Orthodontics) were immersed into six different beverages: (1) Coca-Cola(®); (2) Beer; (3) Orange juice; (4) Red wine; (5) Coffee and (6) artificial saliva (control). The period of immersion was 15 min for the first and second cycles and 30 min for the third to fifth cycles. Tensile forces were read in a tensile testing machine before and after the five immersion cycles. One-way repeated measures ANOVA was used to identify significant differences. RESULTS: Force degradation was seen in all evaluated groups and at all observation periods (p<0.05). A greater degree of degradation was present at the initial periods, decreasing gradually over time. However, no statistically significant differences were seen among groups at the same periods, showing that different groups behaved similarly. CONCLUSION: The chemical nature of the evaluated beverages was not able to influence the degree of force degradation at all observation periods

Facial and dental alterations according to the breathing pattern

There is controversy in the literature about possible interaction of the respiratory mode with the facial and dental structures. OBJECTIVES: The aim of this study was to perform a longitudinal assessment of the changes in facial and dental structures in Angle's Class II, division 1 malocclusion individuals, divided according to the respiratory pattern (predominantly nasal or mouth), at two distinct moments of craniofacial development. MATERIAL AND METHODS: Pogonium and nose measurements were made on the lateral cephalometric tracings (LS'-Pog', LS'-B', B'-Pog', Pog'-PogTeg', Line NB, Pog-NB, N'-Prn, Prn-NPog, N-Prn-Sn, Prn-Sn-LS). Dental measurements were made on the plaster models (distances between the tips of the canine cusps and the tips of mesial cusps of the first molars) of 40 individuals aged 10 to 14 years (moment 1) and 13 to 16 years (moment 2), 23 being nose breathers (NB) and 17 being predominantly mouth breathers (MB). RESULTS: The Student's-t test and two-way ANOVA with repeated measures were applied to indicate differences between the mean values of these variables according to the moments and/or respiratory mode. CONCLUSIONS: There were alterations in the facial measurements, without interference of the breathing pattern. However, the breathing pattern infuenced dental alterations