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Innovative new materials in dentistry

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Among other qualities, becoming a dentist requires many years of study, constant dedication over time and continuous professional development. Anybody wishing to join the profession must learn to manage complex cases and remain up to date with the solutions made possible by advancing technology.

To work as a dentist in Italy, you must first obtain a degree course in dentistry and dental prosthetics, then complete a period of internship in a public hospital and pass a national examination. Dentists must also keep up to date and be fully informed with the latest materials and impression-taking techniques like alginate dental impressions commonly used in dentistry to satisfy many professional needs.

If you are planning to become a dentist, it is a good idea to become familiar with this type of material. So, let us examine together the most common uses and the main properties of alginates.

 

When to use alginates

Alginates are essential impression materials for many areas of dentistry and are used in all procedures that require collaboration between the dentist and the laboratory. Thanks to the ease with which alginates can be mixed, impressions can be obtained from them very rapidly. Alginates are also cheap and are well tolerated by the vast majority of patients.

This type of material is commonly used to produce preliminary and primary impressions, and to produce study and other models. Many dentists even use alginates to produce final impressions for removable prostheses. Many dentists today have simplified their procedures and processes – a tendency that certainly benefits practices with less experienced staff. Recent research carried out in a university clinic showed that teaching newer, simpler techniques requiring only one alginate impression instead of two to produce a complete prosthesis not only reduced the number of appointments needed to fit the finished prosthesis but also avoided the need for modifications and adjustments after fitting.

One of the reasons that make alginates the preferred material for primary impression taking in removable prosthesis production is their mucostaticity and hydrophilia. These properties result in an overextended impression and ensure that the post dams, frenums and depth of the vestibule are clearly visible in stone models. In double-step impression techniques, these anatomical details enable the dentist to produce an accurate custom impression tray and identify the limits of the complete prosthesis.

 

Main physical and chemical properties

Alginates are irreversible hydrocolloid compounds of the sodium and potassium salts of alginic acid. They guarantee unique physical and chemical properties and excellent performance.

Alginates are used extensively in dental practices for their compatibility with the gypsum needed to produce the stone models on which prostheses are made, and for their hydrophilia, which ensures a good reaction with water and the saliva found on the surfaces of the oral mucosae.

Finally, alginates offer dentists generally short setting times, though these vary with the type of product used. Certain products are purposefully formulated with longer setting times to achieve greater accuracy in recording the position and shape of the frenums – indispensable information for establishing the limits of removable prostheses and creating custom impression trays.

The trends behind the latest dental procedures seem to confirm the concept of Appropriatech: present and future dentists should adopt simple and economical methods and materials to provide good quality prostheses to the majority of edentulous patients. As in all medical professions, of course, every patient presents a unique case that requires evaluation and adaptation to its needs. The dentist’s choice whether to use classical or more innovative materials and techniques for their patients is therefore of primary importance. Thanks to the latest developments in the field of alginates, dental professionals can choose materials with characteristics suitable for use in partly or completely edentulous patients and for the production of partial and complete prostheses.

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Canada to donate up to 200,000 vaccine doses to combat mpox outbreaks in Africa

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The Canadian government says it will donate up to 200,000 vaccine doses to fight the mpox outbreak in Congo and other African countries.

It says the donated doses of Imvamune will come from Canada’s existing supply and will not affect the country’s preparedness for mpox cases in this country.

Minister of Health Mark Holland says the donation “will help to protect those in the most affected regions of Africa and will help prevent further spread of the virus.”

Dr. Madhukar Pai, Canada research chair in epidemiology and global health, says although the donation is welcome, it is a very small portion of the estimated 10 million vaccine doses needed to control the outbreak.

Vaccine donations from wealthier countries have only recently started arriving in Africa, almost a month after the World Health Organization declared the mpox outbreak a public health emergency of international concern.

A few days after the declaration in August, Global Affairs Canada announced a contribution of $1 million for mpox surveillance, diagnostic tools, research and community awareness in Africa.

On Thursday, the Africa Centres for Disease Control and Prevention said mpox is still on the rise and that testing rates are “insufficient” across the continent.

Jason Kindrachuk, Canada research chair in emerging viruses at the University of Manitoba, said donating vaccines, in addition to supporting surveillance and diagnostic tests, is “massively important.”

But Kindrachuk, who has worked on the ground in Congo during the epidemic, also said that the international response to the mpox outbreak is “better late than never (but) better never late.”

“It would have been fantastic for us globally to not be in this position by having provided doses a much, much longer time prior than when we are,” he said, noting that the outbreak of clade I mpox in Congo started in early 2023.

Clade II mpox, endemic in regions of West Africa, came to the world’s attention even earlier — in 2022 — as that strain of virus spread to other countries, including Canada.

Two doses are recommended for mpox vaccination, so the donation may only benefit 100,000 people, Pai said.

Pai questioned whether Canada is contributing enough, as the federal government hasn’t said what percentage of its mpox vaccine stockpile it is donating.

“Small donations are simply not going to help end this crisis. We need to show greater solidarity and support,” he said in an email.

“That is the biggest lesson from the COVID-19 pandemic — our collective safety is tied with that of other nations.”

This report by The Canadian Press was first published Sept. 13, 2024.

Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

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How many Nova Scotians are on the doctor wait-list? Number hit 160,000 in June

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HALIFAX – The Nova Scotia government says it could be months before it reveals how many people are on the wait-list for a family doctor.

The head of the province’s health authority told reporters Wednesday that the government won’t release updated data until the 160,000 people who were on the wait-list in June are contacted to verify whether they still need primary care.

Karen Oldfield said Nova Scotia Health is working on validating the primary care wait-list data before posting new numbers, and that work may take a matter of months. The most recent public wait-list figures are from June 1, when 160,234 people, or about 16 per cent of the population, were on it.

“It’s going to take time to make 160,000 calls,” Oldfield said. “We are not talking weeks, we are talking months.”

The interim CEO and president of Nova Scotia Health said people on the list are being asked where they live, whether they still need a family doctor, and to give an update on their health.

A spokesperson with the province’s Health Department says the government and its health authority are “working hard” to turn the wait-list registry into a useful tool, adding that the data will be shared once it is validated.

Nova Scotia’s NDP are calling on Premier Tim Houston to immediately release statistics on how many people are looking for a family doctor. On Tuesday, the NDP introduced a bill that would require the health minister to make the number public every month.

“It is unacceptable for the list to be more than three months out of date,” NDP Leader Claudia Chender said Tuesday.

Chender said releasing this data regularly is vital so Nova Scotians can track the government’s progress on its main 2021 campaign promise: fixing health care.

The number of people in need of a family doctor has more than doubled between the 2021 summer election campaign and June 2024. Since September 2021 about 300 doctors have been added to the provincial health system, the Health Department said.

“We’ll know if Tim Houston is keeping his 2021 election promise to fix health care when Nova Scotians are attached to primary care,” Chender said.

This report by The Canadian Press was first published Sept. 11, 2024.

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Newfoundland and Labrador monitoring rise in whooping cough cases: medical officer

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ST. JOHN’S, N.L. – Newfoundland and Labrador‘s chief medical officer is monitoring the rise of whooping cough infections across the province as cases of the highly contagious disease continue to grow across Canada.

Dr. Janice Fitzgerald says that so far this year, the province has recorded 230 confirmed cases of the vaccine-preventable respiratory tract infection, also known as pertussis.

Late last month, Quebec reported more than 11,000 cases during the same time period, while Ontario counted 470 cases, well above the five-year average of 98. In Quebec, the majority of patients are between the ages of 10 and 14.

Meanwhile, New Brunswick has declared a whooping cough outbreak across the province. A total of 141 cases were reported by last month, exceeding the five-year average of 34.

The disease can lead to severe complications among vulnerable populations including infants, who are at the highest risk of suffering from complications like pneumonia and seizures. Symptoms may start with a runny nose, mild fever and cough, then progress to severe coughing accompanied by a distinctive “whooping” sound during inhalation.

“The public, especially pregnant people and those in close contact with infants, are encouraged to be aware of symptoms related to pertussis and to ensure vaccinations are up to date,” Newfoundland and Labrador’s Health Department said in a statement.

Whooping cough can be treated with antibiotics, but vaccination is the most effective way to control the spread of the disease. As a result, the province has expanded immunization efforts this school year. While booster doses are already offered in Grade 9, the vaccine is now being offered to Grade 8 students as well.

Public health officials say whooping cough is a cyclical disease that increases every two to five or six years.

Meanwhile, New Brunswick’s acting chief medical officer of health expects the current case count to get worse before tapering off.

A rise in whooping cough cases has also been reported in the United States and elsewhere. The Pan American Health Organization issued an alert in July encouraging countries to ramp up their surveillance and vaccination coverage.

This report by The Canadian Press was first published Sept. 10, 2024.

The Canadian Press. All rights reserved.

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