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Introducing Rhondair – New Dental Aerosol Capture System Provides Post-COVID Protection.

Introducing Rhondair – New Dental Aerosol Capture System Provides Post-COVID Protection.

Rhondium Dental Labs is excited to introduce Rhondair – an Aerosol Capture System designed in New Zealand by local dentist turned serial inventor and entrepreneur Dr Simon McDonald.
Dentists are one of the most at-risk occupations for exposure to pathogens, including COVID-19, primarily due to the aerosol-generating nature of most dental procedures and their proximity to patients. The Rhondair is specifically designed for dental industries to reduce the harmful impacts of dental aerosols on both dental practitioners and their patients.

Rhondium was successfully awarded funding from the New Zealand Ministry of Business, Innovation, and Employment’s “COVID-19 Innovation Acceleration Fund”; a government initiative established to accelerate the development of innovative solutions to assist in fighting the global pandemic.
The key philosophy behind the Rhondair is to capture dental aerosols at the source, instead of allowing them to spread and then relying on PPE or disinfecting methods to keep patients and staff safe.
“PPE should be your last line of defence, not your first” says Rhondium Marketing Manager Fin McDonald. “It’s standard risk minimisation. If you have a hazard you can isolate and contain at the source, that’s the best approach.”

The Rhondair’s unique aerodynamic design creates a powerful draw away from a patient to capture created aerosols and incorporates single-use or sterilisable components for ideal infection control. Its enclosed medical-grade H13 HEPA filter captures 99.95% or more of all particles. This includes the size ranges that viruses, COVID-19, and dental aerosols exist within; making it more effective than all common types of medical masks, including N95 variants. The Rhondair can also be kept running when not in active use, such as between patients, to continually purify the air for added protection.
As an essential service, Rhondium Dental Labs has continued to operate throughout the March and August lockdowns in New Zealand, bringing a completely new product through conception, prototyping, development, refinement, production scaling, and to market in little more than 6 months. Rhondium is no stranger to dental research and product development, with previous inventions including the One Visit Crown in 2014 and the McDonald Matrix band in 2018.

Units are now shipping around the world, with high demand across the US and UK. Visit for more information.

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Botox for TMJ disorders may not lead to bone loss in the short term, but more research is needed

Low-dose botox injections for jaw and facial pain not linked to bone changes, but NYU Dentistry researchers observe reduced bone density at higher doses

New York University

Botox injections to manage jaw and facial pain do not result in clinically significant changes in jaw bone when used short term and in low doses, according to researchers at NYU College of Dentistry. However, they found evidence of bone loss when higher doses were used.

The researchers, whose findings are published in the Journal of Oral Health Rehabilitation, call for further clinical studies to track bone- and muscle-related changes with long-term use of Botox for TMJD, or temporomandibular muscle and joint disorders.

TMJDs are a group of common pain conditions that occur in the jaw joint and surrounding muscles, with the most common type involving the muscles responsible for chewing. While many individuals manage their TMJD symptoms with conservative treatments such as jaw exercises, oral appliances, dietary changes, and pain medication, some do not respond to these treatments.

Botox (or botulinum toxin), an FDA-approved injectable drug known for its wrinkle-reducing capabilities, is approved to treat certain muscle and pain disorders, including migraines. It works in part by temporarily paralyzing or weakening muscles. In the U.S., a Phase 3 clinical trial is currently underway to study the use of Botox to treat TMJD, but in the meantime, it is increasingly being used off-label.

Thus far, small studies using Botox to treat TMJD in humans have had mixed results. In animal studies, Botox injections in jaw muscles have led to major bone loss in the jaw. This is thought to be due to the muscles not being used to exert force needed for bone remodeling, but Botox may also have a direct effect on bone resorption, the process of breaking down bone tissue.

"Given these concerning findings from animal studies, and the limited findings from clinical studies, more research on the safety of Botox for jaw muscles and bones is critically important," said Karen Raphael, professor in the Department of Oral and Maxillofacial Pathology, Radiology and Medicine at NYU College of Dentistry and the study’s lead author.

The NYU study included 79 women with TMJD affecting their facial muscles: 35 of whom received Botox injections (between two and five rounds in the past year) and 44 who were not treated with Botox but may have used other TMJD treatments. Using specialized CT scans, the researchers measured participants’ jaw bone density and volume.

The researchers found that jaw bone density and volume were similar between women who had Botox injections to treat their TMJD and those who did not. While most study participants were given relatively low doses of Botox–smaller than in most clinical trials for TMJD–individuals who received higher doses of Botox were more likely to have lower bone density.

Raphael and her colleagues recommend that more human studies be conducted to better understand the impact of the long-term use of Botox on jaw muscles and bones–and whether it just reduces muscle force on bone or also plays a direct role in altering bone resorption.

"Should Botox receive regulatory approval for the treatment of TMJD, we would recommend that a phase IV study be done using low-radiation CT and MRI to track bone- and muscle-related changes with Botox use, examining both dose and long-term use," said Raphael. "Unless specialized imaging of muscle and bone are conducted among patients who receive Botox treatment over long periods, true cumulative effects will remain unknown."


In addition to Raphael, study authors include Malvin Janal, Vivian Santiago, and David Sirois of NYU College of Dentistry, as well as Aditya Tadinada and Alan Lurie of the University of Connecticut School of Dental Medicine. This research was supported in part by the National Institutes of Health’s National Institute of Dental and Craniofacial Research (R01DE024522).

About NYU College of Dentistry

Founded in 1865, New York University College of Dentistry (NYU Dentistry) is the third oldest and the largest dental school in the US, educating nearly 10 percent of the nation’s dentists. NYU Dentistry has a significant global reach with a highly diverse student body. Visit for more.


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“Effect of local application of simvastatin in bone regeneration of peri-apical defects-a clinico-radiographic study



Journal of Oral Biology and Craniofacial Research



The present study evaluates and compares the effectiveness of Simvastatin (SIM), Hydroxyapatite (HA), and platelet-rich fibrin (PRF) in bone regeneration of periapical defects.

Material& method

Thirty-nine patients were selected and randomized into three groups, Group 1: HA (n = 13), Group 2: PRF (n = 13), Group 3: SIM (n = 13). After completion of RCT and apicoectomy, the grafts were placed locally in the defect and sutured.


At the end of twelve months, postoperative symptoms and radiographic analysis assessed the outcome of the treatment


Intragroup analysis of CBCT- Periapical Index (PAI) scores at 6th and 12th month revealed a significant change in the SIM group (p = 0.018 and 0.001 respectively), compared to PRF (p = 0.026 and 0.001 respectively) and HA (p = 0.053 and 0.039 respectively). Intergroup analysis of change in the level of CBCT-PAI score was highly significant (p = 0.003).

SIM caused a more considerable change in the level of CBCT-PAI score compared to other groups, thereby indicating a faster rate of bone regeneration.

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The use of radiographic imaging technologies by general dentists in Ontario, Canada

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

Available online 14 August 2020

 Available online 14 August 2020


The aim of this study was to determine the prevalence of 2-dimensional and 3-dimensional digital imaging technologies, the methods used by general dentists to limit patient exposure to ionizing radiation, and the impact of dentists’ education on imaging technologies and patient dose-reducing techniques.

Study Design

A cross-sectional, web-based survey of all general dentists in Ontario was conducted.


Responses from 1332 (14.7%) of the 9052 registered general dentists in Ontario were included in the analysis. Approximately 89% reported using digital intraoral technology, 81.1% reported owning panoramic imaging systems, 71.2% reported making referrals for cone beam computed tomography (CBCT), and 9.5% reported including CBCT in their practices. CBCT was most commonly used for dental implant treatment planning (85.8%), followed by endodontics (45.4%), evaluation of pathology (39.6%), and surgical assessment for impacted teeth or difficult extractions (36.8%). Approximately 32.7% used only collimators with a long focal point–receptor distance and 8% used only rectangular collimation; 86.9% reported using a thyroid collar when imaging patients. Differences in educational backgrounds correlated with differences in the use of imaging and dose-reducing techniques.


There is widespread adoption of digital imaging technologies by general dentists in Ontario, including CBCT. Greater implementation of long and/or rectangular collimation could markedly reduce the ionizing radiation dose to patients. Changes in dental education curricula and continuing education course offerings may address these issues.


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The success of using 2% lidocaine in pain removal during extraction of mandibular premolars: a prospective clinical study



The purpose of this study was to evaluate the anesthetic effectiveness of a buccal infiltration technique combined with local massage (using 2% lidocaine) in the extraction of mandibular premolars to be utilized as an alternative to the conventional inferior alveolar nerve block.


Patients eligible included any subject with a clinical indication for tooth extraction of the mandibular 1st or 2nd premolars. All patients were anesthetized buccally by local infiltration technique followed by an external pressure applied for 1 min directly over the injection area. In each case, another local injection was given lingually. All operations were started at approximately 5 min after the buccal injection. The collected data included age, gender, pain perception and its intensity during treatment at three checkpoints, apical tenderness, and the type of extraction. Any associated complications or difficulties were also recorded. Then the results were analyzed and interpreted using appropriate statistical tests. The significance level was set at P ≤ 0.05.


A total of 247 cases (1st premolar, n = 119; 2nd premolar, n = 128), predominantly male, were included. In 95% of study sample, the patients were satisfied with the dental extraction without any pain. However, in 5% of cases, pain was reported at the stage of tooth removal. Apical tenderness was found to be present in 11% of the total cases. Three teeth required surgical removal. Upon analysis, no significant differences in the success rates were detected between the 2 premolar groups or amongst the various age groups. Minor and transient side effects were reported in this study.


The technique is simple and effective as well. It might be considered as an alternative anesthetic injection to the inferior alveolar nerve block for dental extraction of the mandibular premolars.


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Why DDS Rescue Is A Super Hero

 I am a big supporter of Liptak Dental’s DDS Rescue services. They have bailed me out of a few situations over the years and continued that today.  

We had an orthodontic patient in for a consult today and he wanted to start right away. We went over everything and then went to print consent forms etc. Only problem was we could not find the consent form folder on any computer. All the forms had vanished.  Obviously someone had deleted files on the server by accident.

I called over to DDS Rescue and asked for them to make an old backup copy available for me to search. We picked a date almost 1 year ago as I knew it would be on the server copy at that time. They mounted the old copy and a quick sFTP connection into the old files and within a minute I had my folder with all the consent forms downloaded and back in my possession.

Bad things can happen at any time and even when you don’t know it but having a great recovery system makes difficult times easier. So if you are considering looking for a safe and secure way to protect your data and keep your office up and running through a data emergency or just plan losing a file consider DDS Rescue.

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