How Many Surfaces Is My Filling?
When your dentist says you need a "2 surface filling" or a "3 surface filling," they are describing how much of the tooth the cavity has reached, and that number is what determines the cost of your filling. Each tooth has five distinct surfaces, and the more of them a cavity touches, the more time, material, and precision the repair takes. Below is what each filling type means, what it costs at our office, and what to expect during treatment. You can see our complete fee schedule on our pricing page.
What Are the Five Tooth Surfaces?
Dentists divide every tooth into five surfaces: the biting surface (the grooved top of back teeth, or the edge of front teeth), the cheek-facing surface, the tongue-facing surface, and the two side surfaces that touch the neighboring teeth. On your treatment plan you may see letter codes for these surfaces next to the tooth number. A filling is named by counting how many of these five surfaces the cavity involves.
1 Surface Filling: $300
Only one surface of the tooth is affected by the cavity. This most commonly means the grooved biting surface, where food and bacteria settle into the natural pits of the tooth, but it can also be a cavity on the cheek side or tongue side near the gumline. After the tooth is adequately numbed, the decay is removed and a single surface is filled and polished. This is the least complex and least expensive filling.
2 Surface Filling: $350
Two surface fillings are very common because of how cavities form between teeth, where floss slides but toothbrush bristles cannot reach. A cavity that starts between two teeth is always a minimum of two surfaces, because the only way to reach it is through the biting surface. Restoring the side of a tooth also requires placing a thin matrix band around the tooth to rebuild the wall properly, which adds time and finishing work.
3 Surface Filling: $400
A three surface filling is often needed when both sides of the tooth have cavities that started between the teeth, or when part of the tooth has fractured and undermined a cusp. Rebuilding three surfaces means recreating more of the tooth's original shape, including the contact points with both neighboring teeth, so it requires greater precision and chair time.
4+ Surface Filling: $450
A filling covering four or all five surfaces is needed when decay or fracture damage is extensive. It is also common in front teeth with chip damage involving the biting edge. At this size, the filling is rebuilding much of the visible tooth, so comprehensive shaping and polishing are needed to restore natural function and appearance.
Why Do More Surfaces Cost More?
The fee reflects the work involved: more surfaces mean more decay removal, more material placed in careful layers, more shaping to recreate the tooth's anatomy, and more time verifying your bite afterward. Our fees are the same whether or not you have insurance, and they are published so there are no surprises. We accept most PPO insurance plans as out-of-network providers and will help you understand your benefits. See the full fee list on our pricing page.
What Are Our Fillings Made Of?
As a holistic practice, we never place mercury amalgam fillings. We restore teeth with BPA-free materials, including ORMOCER fillings, a ceramic-based material that contains no monomer and does not release BPA as it ages. If you are curious about what is in standard white fillings, read our article on whether there is BPA in composite fillings. If you have old metal fillings, we offer safe amalgam removal using a protective protocol.
When Is a Filling Not Enough?
When a cavity or fracture involves too much of the tooth, a filling can no longer hold the remaining structure together, and a crown or onlay may be the better long-term repair. Our approach follows biomimetic dentistry principles: preserve as much healthy natural tooth as possible and restore only what is damaged. Catching cavities while they are still one or two surfaces is the best way to keep treatment small and affordable, which is why regular checkups matter.
FAQ's
A 1 surface filling repairs a cavity confined to a single surface of the tooth, most often the grooved biting surface. A 2 surface filling repairs decay that spans two surfaces, which is common when a cavity forms between teeth, because reaching it also involves the biting surface. The 2 surface filling takes more time and costs slightly more: $350 instead of $300 at our office.
Our filling fees are published: $300 for 1 surface, $350 for 2 surfaces, $400 for 3 surfaces, and $450 for 4 or more surfaces. We accept most PPO insurance as out-of-network providers, and our full fee schedule is on our pricing page.
The dentist examines the cavity's extent on X-rays and clinically, mapping which surfaces require preparation.
Yes. Untreated cavities spread. A 1 surface cavity can grow to require 2, 3, or 4 surface treatment over time.
Yes. We charge $200 per tooth for safe amalgam removal using our protective protocol.
Think you might have a cavity, or want a second opinion on a treatment plan? Contact us or call or text 916-507-2122 to schedule an exam at our Carmichael office.