Restoring teeth is possible at nearly every stage of damage, from early enamel erosion you can reverse at home to full tooth replacement with implants. The right approach depends on how much tooth structure remains and whether the tooth is still alive. Here’s what each level of restoration involves, what it costs, and how long you can expect results to last.
Reversing Early Damage Without a Dentist
Before a cavity forms a visible hole, it starts as a “white spot lesion,” a patch where minerals have begun dissolving out of the enamel. At this stage, the damage is reversible. Your body can redeposit minerals back into weakened enamel, a process called remineralization, as long as the surface layer is still intact.
Fluoride is the most effective accelerator of this process. Weakened enamel actually absorbs fluoride more readily than healthy enamel, which makes fluoride toothpaste and professional fluoride treatments particularly useful for teeth that are just beginning to break down. The fluoride integrates into the crystal structure of the tooth, creating a surface that’s more resistant to acid than the original enamel was. Hydroxyapatite toothpastes work through a similar mechanism, supplying the same mineral compound that makes up natural enamel. Both approaches only work on non-cavitated lesions, meaning the surface hasn’t physically broken through yet. Once there’s a hole, no toothpaste can fill it.
To give remineralization the best chance, reduce how often your teeth sit in acid. That means limiting sugary or acidic snacks between meals, drinking water after coffee or citrus, and waiting 30 minutes after eating before brushing so you don’t scrub softened enamel away.
Fillings for Small to Moderate Cavities
When decay breaks through the enamel surface, a filling is the most straightforward fix. The dentist removes the decayed portion and fills the space with a material that seals the tooth and restores its shape. The two most common options are amalgam (silver-colored) and composite resin (tooth-colored).
Composite resin is now the standard for most fillings because it bonds directly to tooth structure and matches your tooth color. At least 60% of composite fillings last more than 10 years when placed correctly, and many last significantly longer. The procedure typically takes one appointment of 30 to 60 minutes, and you can eat on the tooth the same day.
Cost ranges from $50 to $150 for amalgam and $90 to $250 for composite, depending on the size and location. Most dental insurance covers fillings as basic care, though composite may be partially covered if the tooth is in the back of the mouth where some plans only reimburse at the amalgam rate.
Root Canals for Infected Teeth
If decay reaches the soft tissue inside the tooth (the pulp, which contains nerves and blood vessels), the tooth becomes painful and infected. A root canal removes the infected pulp, cleans the inner canals, and seals the space. The tooth stays in your mouth but is no longer alive.
Root canals cost $500 to $1,000 for a front tooth and $800 to $1,500 for a molar, which has more canals and takes longer. Most root canals require one or two appointments. Afterward, the tooth almost always needs a crown because removing the pulp makes it more brittle over time.
Crowns for Heavily Damaged Teeth
A crown is a cap that fits over the entire visible portion of a tooth, restoring its shape, strength, and appearance. Crowns are used when too much tooth structure is missing for a filling to hold, after a root canal on a back tooth, or when a tooth has cracked.
How Material Affects Longevity
Not all crown materials perform equally. A large systematic review tracking thousands of crowns found these five-year survival rates: metal-ceramic crowns survived at 96%, reinforced glass ceramic at 96.6%, and all-metal crowns performed similarly well. Pure porcelain crowns had a lower five-year survival of about 91%, and they performed significantly worse on back teeth where chewing forces are higher. At the 10-year mark, the gap widens further. Metal crowns survived at 68%, metal-ceramic at 62%, and all-ceramic at 48% in one long-term UK study.
Zirconia crowns have become popular because they’re tooth-colored and extremely strong, but early data showed a higher rate of the porcelain coating chipping off. Newer designs that are made entirely from zirconia (without a porcelain layer) have addressed this, though long-term data is still catching up. For front teeth where appearance matters and chewing forces are lower, ceramic and porcelain crowns are reasonable. For molars, materials with metal or reinforced ceramic cores hold up better.
Crowns cost $500 to $1,500 for metal, $600 to $1,800 for porcelain-fused-to-metal, and $800 to $2,000 for all-ceramic. The process usually takes two visits spaced about two weeks apart: one to prepare the tooth and take impressions, another to cement the permanent crown. Some offices with in-house milling machines can complete both steps in a single visit.
When a Tooth Can’t Be Saved
Not every tooth is restorable. Dentists evaluate four main factors when deciding if a tooth is worth saving: bone support, structural integrity, root health, and functional position.
A tooth with less than 30% of its surrounding bone intact generally can’t be maintained long-term. Similarly, a tooth that has lost so much structure above the gumline that there’s no “collar” of solid tooth for a crown to grip (called the ferrule effect) has a high risk of failure even with aggressive treatment. Teeth with vertical root fractures or those that have had multiple failed root canal retreatments are typically considered beyond repair.
Teeth that are severely tilted or have grown too far out of their socket can sometimes be corrected with orthodontics or minor reshaping. But if restoring the tooth to its proper position would compromise neighboring teeth or leave too little root inside the bone, extraction and replacement is the better path.
Replacing Missing Teeth
Once a tooth is gone, three main options exist: dental implants, fixed bridges, and removable dentures. Each has distinct tradeoffs in durability, comfort, and cost.
Dental Implants
An implant is a titanium post surgically placed into the jawbone, where it fuses with the bone over three to six months in a process called osseointegration. Once stable, a custom crown is attached on top. The result looks, feels, and functions like a natural tooth. Implants have a 10-year survival rate of about 96%, making them the most durable replacement option available. Some patients need up to nine months for full healing, especially if bone grafting is required to build up a thin jawbone first.
The timeline breaks down into distinct phases. The first two weeks involve gum healing, with mild swelling and tenderness. Over the next several months, the implant silently integrates with the bone. A stability check around six weeks confirms things are on track. The final crown or bridge is placed at three to six months. Lower jaw implants tend to heal faster than upper jaw implants because the lower jawbone is denser.
Implants are the most expensive option, typically running $3,000 to $5,000 per tooth when you include the implant, abutment, and crown. Their key advantage beyond longevity is that they preserve the jawbone. When a tooth is missing, the bone underneath gradually shrinks. An implant stimulates the bone the same way a natural root does, preventing that loss.
Fixed Bridges
A bridge replaces a missing tooth by anchoring a false tooth to crowns on the two neighboring teeth. It’s permanently cemented in place, so it doesn’t come in and out. Research comparing three-unit bridges to implant-supported replacements found similar rates of long-term success (around 69% prosthetic success for both). The tradeoff is that the two anchor teeth must be filed down to accept crowns, which removes healthy tooth structure from teeth that may have been perfectly fine.
Bridges are a good choice when the neighboring teeth already need crowns anyway, or when implant surgery isn’t an option due to health conditions or insufficient bone. They cost less than implants and require only two to three weeks of appointments rather than months of healing.
Removable Dentures
Partial or full dentures are the least invasive and least expensive option. Modern dentures fit better than older versions, and implant-supported dentures (which snap onto two to four implants for stability) have largely solved the problem of dentures that slip during eating and speaking. The downside of conventional dentures is that they don’t stimulate the jawbone, so bone loss continues underneath them, gradually changing the fit over time.
Making Restorations Last
The lifespan of any restoration depends heavily on what happens after you leave the dental office. Brushing twice daily, flossing around crowns and implants, and using an antiseptic or fluoride mouthwash are the basics. Implants can’t get cavities, but the gum tissue around them can become inflamed and infected just like natural gums, so cleaning around the base of the implant matters as much as cleaning natural teeth.
People with dry mouth face a higher risk of decay around the edges of crowns and fillings, where the restoration meets natural tooth. If you take medications that reduce saliva production (antihistamines, antidepressants, and blood pressure medications are common culprits), saliva substitutes and more frequent dental cleanings help protect your restorations. Grinding or clenching at night puts enormous stress on both natural teeth and restorations. A night guard is a small investment that can add years to the life of crowns, fillings, and implants alike.
Stem Cell Pulp Regeneration
One of the more promising developments in dentistry is the ability to regenerate the living pulp inside a tooth rather than removing it with a root canal. In a 2017 clinical study, stem cells harvested from dental pulp were transplanted into five patients with irreversible pulp infections. Three of the five showed complete pulp regeneration with new dentin formation, and four of five had restored nerve activity at 24 weeks. A separate trial in children aged 7 to 12 used stem cells from baby teeth to regenerate pulp tissue in traumatized permanent teeth. All 26 treated patients showed regenerated pulp with functioning blood vessels and nerves at 12 months, with no adverse effects reported.
These results are real but still limited to small studies and specialized research centers. The approach is not yet available as a routine clinical option. For now, root canals remain the standard treatment for infected pulp, but the possibility of regrowing living tissue inside a tooth rather than filling it with inert material is closer to reality than most people realize.