Dentist Blog

By Dr J & Nicole
November 13, 2020
Category: Preventative Care


It's a fascinating concept:  to shorten brushing time and do in 10 seconds what now takes 2+ minutes.  We do like that aspiration! However, research shows the product does not achieve its goal of accomplishing the same quality of cleaning.  In fact, it looks like it doesn't even come close.


The only scientific study done so far on these products was one out of Florence, Italy, where in 22 subjects, the tray toothbrush was found to be ineffective.  The study was referenced in this article:  

Notice also, that the tray doesn't get down to the gum-tooth margins of the front teeth.  That is the most important part of the teeth to brush, as you well know!  A stock tray size just won't fit each mouth perfectly, especially when there is gum recession that makes the teeth essentially much longer.  

We will be interested to follow this product line and see if these shortcomings can be fixed.  In the meantime, we don’t recommend spending your money on it.  

By Dr. JoAnne Carr
February 21, 2020
Category: Cosmetic Dentistry
Tags: Crowns   Bridges  

Bridges and crowns are two of the most popular dental solutions for damaged or missing teeth. These restorative treatments utilize prosthetic appliances for restoring your smile to its healthy and natural state. In general, dentists use crowns for fractured or damaged tooth structures, while bridges are used for restoring one or more missing teeth.

To determine if crowns and bridges will suit your needs, you can visit our practice, Thomas & JoAnne Carr, DDS, in Sunnyvale, CA. Here, one of our dentists, Drs. Thomas Carr, JoAnne Carr, or Robert Yee, can discuss the options available to you and tell you the most appropriate treatment for the results you want to achieve.

What are Crowns?

Crowns are manufactured or synthetic teeth that are made of ceramic or porcelain that dentists can texture and color-match to look like your existing teeth. They can likewise be made of metal alloys for enhanced strength for replacing teeth at the back of the mouth. In most cases, metal crowns are bonded with porcelain for improved durability and a more natural look.

Essentially, crowns are utilized for restoring weakened, fractured, or damaged teeth. The affected tooth will be treated for decay and reshaped to accommodate the crown. Next, the crown will be cemented over the reshaped tooth.

What are Bridges?

Bridges are prosthetic devices for replacing multiple missing teeth and are typically made of metal and porcelain to provide a natural look and sturdiness. A typical bridge contains false teeth secured between two crowns. During application, the existing teeth next to the gap will be prepped and reshaped before cementing the crowns and bridge. Once cemented, the bridge will work and look just like your real teeth.

Do I Need Crowns and Bridges?

Bridges and crowns can be utilized for repairing a variety of dental issues. If you have misshapen, severely discolored, damaged, fractured, or weakened teeth (due to severe decay) or you need a bridge that requires an anchor, crowns can help restore your smile. If you have one or several missing teeth or don’t want to wear dentures, a bridge may also be a viable option.

Need Dental Work? Call our Sunnyvale Office Today

Schedule an appointment with one of our dentists, Drs. Thomas Carr, JoAnne Carr, or Robert Yee, in our Sunnyvale, CA, office. Call Thomas & Joanne Carr, DDS, at (408) 733-4473 for more details.

By Dr. JoAnne Carr
August 22, 2019
Category: Hygiene
Tags: hygiene   floss   glide   PFAS  

I saw it first on my Facebook feed some months ago, something about Glide containing harmful chemicals and not being good to use.

What’s the real story?

It turns out that a study published back in January found compounds called PFAS in the bodies of people who flossed with Glide.

What’s a PFAS

Per - and polyfluoroalkyl substances – PFAS – are man-made chemicals that repel oil and water. They’re found in things as diverse as non-stick cookware (e.g., Teflon), fast food containers, stain-resistant carpet, weatherproof clothing, and …. Glide floss.  They’ve been around since the 1940’s and can accumulate in our bodies and stay around a long time.

Are they harmful

PFAS, according to, have been linked to increased cholesterol levels.  There are limited findings that they may have immunological, hormonal and reproductive effects also.  And one compound, PFOA, has been linked to cancer.  Research is ongoing and there is concern because these are “forever chemicals” – they linger in our bodies, in our drinking water, and in the environment.

The study in question, published in the Journal of Exposure Science and Environmental Epidemiology, measured levels of PFAS in the blood of 178 women and looked at their habits, which in some cases included using Glide.  There is no way to know whether the PFAS were there because of flossing, using non-stick fry pans, ordering take-out pizzas, or any other activity.  And, more importantly, the study says nothing about the effects these chemical compounds had on the subjects’ health. 

Glide was developed to make it easy to slip floss between tight teeth.  It does just that. The benefits of flossing are great in stemming inflammation and gum disease.  Whether PFAS accumulate in the body because of using Glide is still unproven. 

Could you use a different type of PFAS-free floss instead?  Yes, absolutely.  If your teeth are really tight, there are other alternatives that may still be “slippery” enough to get between your teeth. We can give you samples at the office.

The important thing is to keep flossing.

Science keeps finding ways that mouth health is linked to total body health.

The latest news is a potential link between gum (periodontal) disease and Alzheimer’s disease. In the study cited, bacteria from the mouth that causes gum disease was found in the brain tissue of over 90% of the Alzheimer’s patients studied.  Whether this type of bacteria is the cause or a contributing factor in Alzheimer’s disease is still in question.

Either way, keeping gums free of bleeding and inflammation is even more paramount in light of this new information.  Good home care and regular hygiene visits are our “chorus”, but maybe you’ll want to join in the refrain too!  


By Dr. JoAnne Carr
January 18, 2019
Category: Our Office
Tags: Staff   Jill   Svetlana  

Hello Friends,

We hope your New Year has gotten off to a great start and that your resolution to floss every day has already become a habit (for daily flossing IS the best resolution ever, isn’t it)?!

2019 is a year of new beginnings for our office. With tears in our eyes, we bade goodbye to Jill last fall. After seventeen years of “hygiening” with us, she and her family relocated to Colorado, where they are enjoying the mountains and a real winter.

In Jill’s place, we feel very fortunate to have found Svetlana, a graduate of the Foothill College Dental Hygiene program.  We are thrilled to have her, for she is passionate about keeping mouths healthy and getting our patients excited about taking care of their teeth.  Originally from Russia, she and her husband have lived in the Bay Area for five years.  They have a five-year-old daughter and, if she has her way, might be getting a dog soon!

The next time you’re in our office, be sure to notice our new hybrid flooring!  It is a huge update from the tired carpeting that was there, and it has given the entire space a new fresh look.

Hope to see you soon!  

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