Tooth Worms? The History of Cavities and Tooth Fillings

April 22nd, 2026

Scientists have discovered tooth decay in specimens that are more than 15,000 years old. The ancients once thought that cavities were caused by something called “tooth worms” … Eew! They didn’t exist, of course, but how else could humans explain the holes that cavities make in teeth?

The appearance of cavities on a widespread basis is often traced to the rise of farming. The new diet filled with grains and carbs made our mouths a haven for cavity-causing bacteria. As we added more sugar to our diets, our teeth got worse.

The “tooth worm” idea didn’t completely disappear until the 1700s when scientists finally began to understand the process of dental caries. Once that part of the puzzle was solved, they began focusing on filling existing cavities and preventing new ones.

Dental Fillings Come of Age

Many different materials, including beeswax, cork, aluminum, tin, and even asbestos, have been used to fill the holes caused by dental decay. Sometime in the mid-1800s, however, dentists began to use metal fillings such as gold, platinum, silver and lead amalgams.

The amalgam we use today is mixed from liquid mercury, silver, tin, copper, zinc, and other metals, but some patients still like the look of a gold filling. Newer options include composite-resin fillings, which are made from a tooth-colored mixture of plastic resin and finely ground glass-like or quartz particles that form a durable and discreet filling. Porcelain or ceramic fillings are natural in color, but more resistant to staining.

Dr. John Zarrella and Dr. Peter C. Rider can help decide which filling is best for you, based on cost as well as your dental and lifestyle needs. You may not have “tooth worms,” but if you have cavities, contact our Ashland office so we can take the proper action to protect the health of your mouth.

Help! My gums hurt when I floss!

April 15th, 2026

By no stretch is it rare for your gums to hurt during and after flossing. Even some bleeding is to be expected. This is especially true if you have not flossed in a long time. However, if your gums do indeed hurt when you floss, and unbearably so, there are some things you can do.

Be Gentle

Perhaps the most obvious way to combat gum soreness and bleeding is to be gentle. One of the most common occurrences of these gum problems is over-aggressive flossing. In other words, if you are too rough on your gums while flossing, either because you are out of practice or because you are in a hurry, soreness and hurting is to be expected. Instead, try taking your time and be gentle. Also, if you are just starting out, be patient and consistent, your gums will become more conditioned over time.

Use an Alternative Method

If being consistent and gentle does not work, there are other alternative methods of flossing that you can try. You can also try a water floss machine, or what is sometimes called a water pick. The device essentially shoots water into the crevasses between your teeth, and in other areas of your mouth, in order to dislodge food and plaque. These oral instruments also come with different attachments that allow you to reach many of the hard to see and reach areas of your mouth. And lastly, you can always buy floss that is not as abrasive to your gums. There is floss that comes with soft and gentle coatings that will do less harm to your gums while they are adjusting to the good oral hygiene habit you are creating.

Flossing is one of the easiest parts of oral hygiene to overlook. When you first start out, it is common that you may want to stop because of the pain it can initially cause. However, if you try one, or all, of the above mentioned methods, you will give yourself the best chance of being success with your flossing, and it won't hurt as much.

For more flossing tips, schedule an appointment at our Ashland office and askDr. John Zarrella and Dr. Peter C. Rider or a member of our team!

What should I use to clean my baby’s teeth?

April 8th, 2026

You might think babies don’t need to brush their teeth, especially when they don’t have any. But by starting good habits like brushing when your child is young, you can lay the foundation for them to continue those good habits into adulthood.

When do I start?

The best time to start brushing your baby’s teeth is before he or she has any. Develop the habit of wiping your baby’s gums with a wet, soft washcloth or gauze every day. There is no need to use toothpaste, just wrap the gauze or cloth around your finger, moisten it with a little water, and gently rub it over the gums.

This helps your little one get used to brushing while it eliminates bacteria in the mouth that can harm emerging teeth. You don’t need to apply a lot of pressure or even take very long: just a quick, gentle rub over the gums will do it.

What do I use?

When your child’s teeth begin to come in, you will need to switch from a cloth to a baby toothbrush. Find one that has a grip big enough for your hand, but a head that is small enough to maneuver easily in your infant’s mouth.

You don’t need to use any toothpaste until your son or daughter is about a year old. Even then, though, you’ll want to use just a tiny amount: about the size of a grain of rice. When your toddler is about two years old, you can use a pea-sized amount.

By around six years of age, your child will probably rinse and spit without your help. At that point, you may want to introduce a child-friendly fluoride mouthwash.

How do I do it?

Your child probably won’t be able to brush his or her teeth alone until about the age of five or six. This means that you will need to do it. To brush your child’s teeth, gently use the brush over all the teeth and gums, even areas where the teeth have not come in yet.

As your child grows and becomes more independent, you can allow him or her to hold the toothbrush while you guide your child’s progress. Make sure you talk to your child while you are brushing, and explain why you brush: what you are doing and how you are doing it.

In addition to regular visits with Dr. John Zarrella and Dr. Peter C. Rider, instilling good oral health habits in your child early on will ensure a lifetime of good dental health.

Dental Hygienist Appreciation Week

April 1st, 2026

During the second week in April, we recognize and celebrate the expert care dental hygienists provide. Let’s take a moment this week to explore how the special skills of this valued member of your dental team in Ashland enrich your dental health.

Regular Cleanings

Dentists typically recommend routine dental examinations twice a year, and these visits will almost always include an in-office cleaning by your hygienist. Dental hygienists are highly trained healthcare professionals who are specialists in caring for your teeth and gums.

  • Plaque and tartar need to be removed from tooth enamel to help prevent cavities and gum disease. While you can brush away plaque, it takes a dental professional to remove tartar, which is plaque which has mineralized over time. The hygienists who work with Dr. John Zarrella and Dr. Peter C. Rider might use a hand scaler, an ultrasonic scaler, or both tools to gently scrape sticky plaque and hardened tartar from your tooth enamel.
  • Your cleaning will also include polishing, where surface stains on the enamel are removed using a gentle abrasive. This cleaning might be done with a special toothpaste applied with a small rotating cup or with an air polisher, which removes stains with a stream of fine abrasive powder, water, and pressurized air.
  • An expert flossing will remove any remaining plaque from between the teeth.

Deep Cleaning

Hygienists help prevent gum disease. Plaque and tartar on tooth surfaces below the gum line increase your risk of gum disease. Irritated gum tissue gradually pulls away from the teeth, creating pockets of bacteria and causing inflammation and infection.

  • Your hygienist will use a probe to gently measure the depth of the space between the teeth and gums. Deeper than normal spaces or bleeding could be a sign of gum disease.
  • Tartar on the tooth surface below the gum line will be removed using a treatment called scaling, a non-surgical procedure where your hygienist uses hand scalers or ultrasonic tools to carefully scrape hardened plaque from the tooth.
  • Root planing might be done to smooth the root surfaces so that gum tissue can attach snugly around the teeth again, protecting the roots from plaque buildup and bacteria.

Preventative and Cosmetic Care

Some hygienists work with dentists to help provide additional diagnostic, preventative, and cosmetic services:

  • X-rays and digital imaging.
  • Oral cancer screenings.
  • Sealants, thin plastic coatings which protect the top surfaces of molars—the most likely places to develop cavities—from accumulating food particles and plaque.
  • Fluoride treatment, if recommended, applied in varnish, foam, or gel form.
  • Professional whitening treatments.

Education

Finally, your dental hygienist is an educator!

  • When it comes to brushing, there are effective techniques and . . . not so effective techniques. Your hygienist can teach you the best way to clean away food particles and plaque and the best tools for the job.
  • During a cleaning, your hygienist will point out any spots where plaque has built up. Discovering the spots where you tend to leave plaque behind allows you to do a better, more thorough cleaning job at home.
  • Flossing can be difficult for some of us because we have braces, or because of the way our teeth are aligned, or because of dexterity issues. Your hygienist can show you the best way to floss, as well as recommend products such as specially designed flosses or water flossers which will make flossing easier and more effective.

The dental hygienists at Zarrella Dentistry are skilled professionals who work to create cleaner, brighter, healthier smiles for their patients every day. This week, we appreciate them for helping us achieve the beautiful smiles we get to appreciate all year long!

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Ashland, MA 01721
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