If you already have sensitive teeth, you probably go out of your way to avoid discomfort. You may use sensitive-teeth toothpaste, skip ice-cold drinks, avoid very hot foods, or brush more gently. Did you know that the material used in your tooth’s filling may also contribute to tooth sensitivity?
Why Teeth Feel Sensitive After a Filling
A little sensitivity after a filling is pretty common. Partly because the dentist removes the decayed portion of the tooth, which also removes some of its natural insulation. How the tooth feels afterward can depend on several things:
- How deep into the tooth the cavity was
- How close the decay came to the nerve
- The filling material used
- Pressure from chewing
- Whether the filling sits a little too high
- Cracks or weak areas in the tooth
For most people, sensitivity gradually fades over a few days or weeks. Be sure to call your dentist if the sensitivity worsens, lingers after hot or cold foods and drinks, causes sharp pain when you bite, or comes with throbbing pain or severe swelling.
Your choice of filling material can also influence how the tooth feels after treatment. Composite, amalgam, gold, and ceramic filling materials react differently to temperature and pressure, which affects tooth sensitivity. So, let’s explore your material options.
Composite Fillings and Sensitive Teeth
Composite resin is one of the most common filling materials because it matches the natural color of teeth and bonds directly to tooth structure. Dentists commonly use composite resin to treat a variety of small to medium-sized cavities on both front and back teeth.
One reason composite fillings may help patients with sensitivity is that composite does not allow heat/cold to travel through it as easily as metals do. Other benefits include:
- Natural-looking color
- Bonds directly to the tooth
- Usually requires less tooth removal
- Excellent protection from temperature extremes.
You may still notice a little sensitivity after a composite filling. As the material hardens, it shrinks slightly, which can put a small amount of stress on the tooth. That irritation usually calms down as the tooth adjusts. An experienced dental professional who carefully places the composite and uses appropriate bonding techniques can minimize this discomfort.
Amalgam Fillings and Tooth Sensitivity
Amalgam Fillings have been popular for many years due to their strength, durability, and ability to withstand extremely heavy chewing forces. However, because amalgam contains metal, they tend to conduct heat and cold much faster than composites or ceramics. This can result in greater sensitivity of the newly restored tooth to such stimuli as:
- Ice water
- Hot coffee or tea
- Cold foods
- Sudden temperature changes
The sensitivity is usually temporary and decreases and disappears once the tooth adapts. When treating very deep cavities, dentists may choose to apply protective liners beneath the filling to prevent nerve irritation.
Patients with sensitive teeth may not choose amalgam over other filling options, but when maximum strength and durability matter most, amalgam fits the bill.
Gold Fillings and Sensitive Teeth
Gold fillings are highly regarded for their exceptional strength and durability and can last many years with proper maintenance. Unlike composite fillings, which are placed directly into the tooth, gold restorations are typically custom-made in a dental lab from an impression or digital scan.
The gold filling process usually takes two visits:
- The dentist removes the decay and prepares the tooth.
- An impression or digital scan is taken so the gold filling can be custom-made.
- A temporary filling is applied to protect the tooth until the permanent gold filling is ready.
- At the second appointment, the dentist removes the temporary filling, checks the fit of the gold filling, and then cements it into place.
Because gold is metal, hot and cold temperatures travel through it more easily than they do through composite or ceramic materials. That means the tooth may feel a little more sensitive right after treatment, especially with extreme temperatures. For most people, that initial sensitivity settles down over time.
Gold also tends to cost more than other filling materials, so it may not fit every patient’s budget. However, if you want an extremely durable filling material that can last for many years, gold can be a solid option.
Ceramic Fillings and Tooth Sensitivity
Ceramic restorations, usually made from porcelain or similar materials, provide excellent aesthetics and durability. Dentists often use ceramic material for inlays, onlays, and larger restorations where a composite filling material might not provide enough strength.
Ceramic can appeal to patients because it:
- Closely simulates natural enamel
- Resists discoloration and staining
- Conducts less heat/cold than metal
- Is suitable for larger restorations
- Offers good durability when properly placed
Ceramic fillings are usually more comfortable for sensitive teeth because they do not conduct hot and cold temperatures through the tooth as easily as metal fillings. They also bond closely to the tooth, which supports the remaining natural tooth better and keeps the edges of the restoration sealed.
If you experience tooth sensitivity after a ceramic filling, it’s usually not the ceramic material itself. The sensitivity often comes from the tooth attempting to recover from a very deep cavity, the bonding process itself, or strong bite pressure.
In larger ceramic restorations, such as onlays, the tooth often needs a little more time to adjust to the new material. This is especially true if the tooth had a previously existing crack, a deeper cavity, or a large older filling.
Which Filling Material Causes the Least Sensitivity?
No single filling material guarantees the least sensitivity for every patient. Each material has its own advantages:
- Composite: Often comfortable for temperature-sensitive patients
- Ceramic: Provides good insulation and works well for larger restorations
- Amalgam: Strong and durable but transfers temperature more readily
- Gold: Extremely durable but also conducts heat and cold
Material represents only one part of the picture, however. Tell your dentist about tooth sensitivity before a filling procedure. This allows the dentist to consider all factors before recommending a restorative material.
Choosing the Right Filling Material for Your Tooth
At the Yuba City Dentistry Group, we can help determine which filling material best fits your tooth, your comfort, and your long-term dental needs. If you have a cavity, ongoing sensitivity around an existing filling, or any other dental question or concern, contact our office to schedule an evaluation. You will be glad you did!
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