Clear aligner therapy practices among orthodontists practicing in Canada.

BACKGROUND: The acceptability and preference for clear aligner therapy (CAT) has been increasing among orthodontists, but there is still a lack of consensus regarding CAT best practices. Consequently, this study aimed to investigate CAT practices among orthodontists practicing in Canada. METHODS: The survey was conducted among orthodontists practicing in Canada using a modified previously published survey. Sixty orthodontists participated (6.1% response rate). It consisted of 11 sections with open and closed questions related to demographic information and particularities about using or not using CAT. The survey responses were exported from REDCap to a Microsoft Excel (Microsoft, Redmond, Wash) spreadsheet, then statistically analyzed using SPSS software (SPSS for Windows, version 21.0; IBM Inc., Armonk, NY, USA). The comments were categorized under themes and subthemes. Data were organized in descriptive statistics, expressing frequencies and percentages. RESULTS: Almost 30% of the orthodontist's annual caseload was treated with CAT, most frequently prescribed to adult patients. Case complexity and patient cooperation were the factors that most influenced the decision to prescribe CAT. Almost half of orthodontists reported sometimes combining CAT with adjunctive fixed appliances. CONCLUSIONS: Most orthodontists prescribe CAT, and its use is based on the malocclusion's complexity. Orthodontists who do not prescribe CAT believe that fixed appliance therapy has superior treatment outcomes.

"I Am Half of a Person": Lived Experiences of Individuals Living With Ostomy After Surgery in Rural Haiti.

Intestinal ostomy can have significant effects on lives and lived experiences. However, limited research exists on the experiences of persons with ostomy in low-resource settings, such as rural Haiti. This study aimed to explore the lived experiences of Haitians with an ostomy, focusing on the physical, psychological, and social aspects of their post-operative lives. We conducted 9 semi-structured, in-depth interviews with participants who had undergone ostomy surgery at the Hôpital Universitaire de Mirebalais in Haiti. Employing interpretative phenomenological analysis (IPA), we iteratively examined transcripts to identify convergent and divergent codes, which were then grouped into themes to better understand the participants' experiences. Three themes emerged: (a) ostomy as a social disease, which has severe impacts on relationships and place in society; (b) ostomy as altering self-image, leading participants to reflect on their identity and the underlying causes of their condition and to reevaluate their necessities and abilities; and (c) ostomy as an arduous medical journey, characterized by pain, distress, uncertainty, and disillusionment, but also resiliency, improvisation, and hope. This study highlights the multifaceted experiences of persons with ostomy in the low-resource rural environment of Haiti and underscores the need for improved access to medical care, financial support, and psychosocial and caregiving resources for these individuals. Findings also emphasize the importance of medical providers' improved understanding in making medical decisions, and cultural and socioeconomic factors in developing effective support strategies.

COVID-19 vaccine acceptance in three rural communes in Haiti: A cross-sectional study.

Vaccines are the most effective mechanism for ending the COVID-19 pandemic. However, reluctance to accept vaccines has hindered the efforts of health authorities to combat the virus. In Haiti, as of July 2021, less than 1% of the country's population has been fully vaccinated in part due to vaccine hesitancy. Our goal was to assess Haitian attitudes toward COVID-19 vaccination and investigate the primary reasons for Moderna vaccine hesitancy. We conducted a cross-sectional survey across three rural Haitian communities, in September 2021. The research team used electronic tablets to collect quantitative data from 1,071 respondents, selected randomly across the communities. We report descriptive statistics and identify variables associated with vaccine acceptance using logistic regression built using a backward stepwise approach. Among 1,071 respondents, the overall acceptance rate was 27.0% (n = 285). The most common reason for vaccine hesitancy was "concern about side effects" (n = 484, 67.1%) followed by "concern about contracting COVID-19 from the vaccine" (n = 472, 65.4%). Three-quarters of respondents (n = 817) identified their healthcare workers as their most trustworthy source for information related to the vaccine. In the bivariate analysis, male gender (p = .06) and no history of drinking alcohol (p < .001) were significantly associated with being more likely to take the vaccine. In the final reduced model, only those with a history of drinking alcohol were significantly more likely to take the vaccine (aOR = 1.47 (1.23, 1.87) p < .001). The acceptance rate for the COVID-19 vaccine is low, and public health experts should design and strengthen vaccination campaigns to combat misinformation and public distrust.

Retention decisions and protocols among orthodontists practicing in Canada: A cross-sectional survey.

INTRODUCTION: This study aimed to survey retention protocols and retainer characteristics among orthodontists practicing in Canada. METHODS: An online questionnaire was distributed to 576 orthodontists registered with the Canadian Association of Orthodontists. It included respondents' demographic details, preferred orthodontic retainers and prescribed wear protocol, adjunctive retention procedures, the timing of retention follow-ups, retainer choice in specific situations, and retainer characteristics. Chi-square tests and Fisher's exact tests were used to test the associations between variables. RESULTS: An 18% response rate was recorded (n = 101). Vacuum-formed retainers were the most commonly used retainers in the maxilla (50.5%), whereas bonded retainers were preferred in the mandible (54.5%). An initial full-time removable retainer wear period was commonly prescribed (63.0%-67.0%). Retainer checks were carried out by 85.1%-89.1% of orthodontists for 1 or 2 years after the end of active orthodontic treatment. Only 44.6%-56.4% were comfortable with general dentists continuing retainer checks. Most (72.5%-84.1%) retainers were fabricated in the orthodontists' office laboratory. Indefinite retainer wear was commonly suggested and was significantly influenced by the number of years in practice. CONCLUSIONS: Most orthodontists' preferred retainer was the vacuum-formed retainers in the maxilla and the bonded retainers in the mandible. A variety of retention protocols and retainer characteristics was evident among orthodontists that reflect the considerable variation in malocclusion traits we face day-to-day. There seems to be a potential dichotomy between orthodontists being uncomfortable about allowing general dental practitioners to manage retention and orthodontists unwilling to provide retention care indefinitely.

Transfusäo maciça: uma abordagem didática para graduandos / Massive transfusion: a review article for medical students

O texto aborda, sucintamente, a fisiopatologia e as complicações de transfusões maciças em pacientes politraumatizados, mostrando a correlaçäo entre a apresentaçäo clínica inicial e perdas sangüíneas estimadas, assim como a terapêutica transfusional racional a ser utilizada

Endogenous and exogenously-induced immunomodulation of tumour-host responsiveness

In spite of the availability of multiple effector mechanisms of the immune system to combat tumour growth and metastases, their impairment frequently accompanies the appearance of cancer. Factors contributing to this impairment may be related to properties of the host and/or the tumour itself and may be with respect to their origin -endogenous or exogenour. Based on the unique biological behavior of prostate cancer (PCa), and its apparent escape from immune surveillance in the presence of tumour immuno genicity, continuing investigation of endogenous and exogenous factors thought to be relevant to its pathogenesis have been made. For this purpose further studies of the suggested role of human seminal plasma (SePl) and the synthetic oestrogen, diethylstiboestrol (DES), as representative endogenous and exogenous immunomodulatory factors (IMF) of tumour-host responsiveness, together with evaluation of human prostatic tissue extracts and leuprolide (the luteinizing-hormone-releasing-hormone proposed as an alternate to DES therapy) have been made by evaluating their effect on the lytic activity of natural killer (NK) cells. SePl and prostate extracts significantly suppressed NK cell lysis. Physicochemical studies suggest SePl and prostate IMF to be associated with high and low molecular weight macromolecules; and implicate the participation of transglutaminase and prostaglandins. Comparative study of therapeutic levels of DES vs. leuprolide on NK cell lysis demonstrated significant suppression by DES vs. a negligible effect of leuprolide. Metastases are highly prevalent in PCa, and contribute significantly to its morbidity and mortality. Further knowledge of the range of effects of endogenous and exogenous IMF on effector mechanisms of tumour-host responsiveness, to include suppression of NK cells, and elucidation of their nature, may contribute toward our understanding of the unique biological behavior of tumours of the prostate, in addition to improvement in their clinical management.