Reviewed by the toothcheck Dental Team Independent dentist providing online second opinions.Reviewed by the toothcheck Dental Team Independent dentist providing online second opinions.

Dental Terms Explained: A Plain-English Glossary of What Your Dentist Just Said

You sat in the chair, someone read off a string of words and numbers, and you nodded along. Then you got home and realized you did not actually understand half of it. That is normal. Dental language is a mix of Latin anatomy, insurance shorthand, and five-digit codes. This glossary translates the most common terms into plain English so you can read your own treatment plan and diagnosis with confidence.You sat in the chair, someone read off a string of words and numbers, and you nodded along. Then you got home and realized you did not actually understand half of it. That is normal. Dental language is a mix of Latin anatomy, insurance shorthand, and five-digit codes. This glossary translates the most common terms into plain English so you can read your own treatment plan and diagnosis with confidence.

Quick Answer

Most dental jargon falls into six buckets: mouth anatomy, diagnoses (what is wrong), treatments (what they want to do), the types of providers, the billing and insurance codes, and the X-rays and records. Below, each common term is defined in one or two plain sentences with the everyday word in parentheses. If you want a real dentist to translate your specific plan, you can upload it for an independent online second opinion.

Teeth and Mouth Anatomy

Enamel (the hard outer shell) is the white, mineralized layer on the outside of the tooth. It is the hardest tissue in your body and has no nerves, so early damage to it does not hurt.Enamel (the hard outer shell) is the white, mineralized layer on the outside of the tooth. It is the hardest tissue in your body and has no nerves, so early damage to it does not hurt.

Dentin (the softer inner layer) sits under the enamel. It is more sensitive than enamel, so decay that reaches it can start to cause twinges with hot, cold, or sweet.Dentin (the softer inner layer) sits under the enamel. It is more sensitive than enamel, so decay that reaches it can start to cause twinges with hot, cold, or sweet.

Pulp (the nerve) is the living center of the tooth, holding the nerve and blood vessels. When people say a tooth needs the nerve treated, they mean the pulp.Pulp (the nerve) is the living center of the tooth, holding the nerve and blood vessels. When people say a tooth needs the nerve treated, they mean the pulp.

Crown, natural (the top of the tooth) is the part you see above the gum. Do not confuse this with the restoration below.Crown, natural (the top of the tooth) is the part you see above the gum. Do not confuse this with the restoration below.

Crown, restoration (a cap) is a lab-made cover cemented over a damaged tooth. Same word, very different meaning, which is a common source of confusion.Crown, restoration (a cap) is a lab-made cover cemented over a damaged tooth. Same word, very different meaning, which is a common source of confusion.

Root (the anchor) is the part of the tooth below the gum that holds it in the jaw. Front teeth usually have one root; back teeth can have two or three.Root (the anchor) is the part of the tooth below the gum that holds it in the jaw. Front teeth usually have one root; back teeth can have two or three.

Cusp (a chewing bump) is one of the raised points on the biting surface of a tooth.Cusp (a chewing bump) is one of the raised points on the biting surface of a tooth.

Mesial, distal, buccal, lingual (which side) are direction words. Mesial is the side toward the front midline, distal is toward the back, buccal or facial is the cheek/lip side, and lingual is the tongue side. Dentists use these to say exactly where a cavity or filling sits.Mesial, distal, buccal, lingual (which side) are direction words. Mesial is the side toward the front midline, distal is toward the back, buccal or facial is the cheek/lip side, and lingual is the tongue side. Dentists use these to say exactly where a cavity or filling sits.

Occlusal (the biting surface) is the flat chewing top of a back tooth.Occlusal (the biting surface) is the flat chewing top of a back tooth.

Occlusion (your bite) is how your upper and lower teeth meet when you close.Occlusion (your bite) is how your upper and lower teeth meet when you close.

Quadrant (one quarter of the mouth) means one of the four corners: upper right, upper left, lower right, lower left. Cleanings and gum treatment are often quoted per quadrant.Quadrant (one quarter of the mouth) means one of the four corners: upper right, upper left, lower right, lower left. Cleanings and gum treatment are often quoted per quadrant.

Anterior and posterior (front and back) simply mean the front teeth versus the back teeth.Anterior and posterior (front and back) simply mean the front teeth versus the back teeth.

Incisor, canine, premolar (bicuspid), molar (the tooth types) run front to back: the flat front biting teeth (incisors), the pointed corner teeth (canines), the two-cusped teeth behind them (premolars or bicuspids), and the large grinding teeth in back (molars).Incisor, canine, premolar (bicuspid), molar (the tooth types) run front to back: the flat front biting teeth (incisors), the pointed corner teeth (canines), the two-cusped teeth behind them (premolars or bicuspids), and the large grinding teeth in back (molars).

Wisdom tooth (third molar) is the last molar at the very back, which often arrives in the late teens or twenties.Wisdom tooth (third molar) is the last molar at the very back, which often arrives in the late teens or twenties.

Diagnoses and Problems

Caries (a cavity or decay) is tooth decay caused by bacteria. It is the formal word behind the number your dentist calls out per tooth.Caries (a cavity or decay) is tooth decay caused by bacteria. It is the formal word behind the number your dentist calls out per tooth.

Recurrent and interproximal caries (decay in a specific spot) describe location: recurrent means new decay around an old filling, and interproximal means decay between two teeth where a brush cannot reach.Recurrent and interproximal caries (decay in a specific spot) describe location: recurrent means new decay around an old filling, and interproximal means decay between two teeth where a brush cannot reach.

Plaque (the soft film) is the sticky bacterial layer that builds up daily and brushes off.Plaque (the soft film) is the sticky bacterial layer that builds up daily and brushes off.

Calculus (tartar) is plaque that has hardened onto the tooth. It no longer brushes off and has to be scraped away professionally.Calculus (tartar) is plaque that has hardened onto the tooth. It no longer brushes off and has to be scraped away professionally.

Gingivitis (early gum inflammation) is red, puffy, or bleeding gums. It is the reversible early stage and usually improves with better cleaning.Gingivitis (early gum inflammation) is red, puffy, or bleeding gums. It is the reversible early stage and usually improves with better cleaning.

Periodontitis (gum disease) is the advanced stage where the inflammation has spread below the gum and started to affect the bone that holds teeth in place. It is measured with the small ruler (a periodontal probe) that reads pocket depths in millimeters.Periodontitis (gum disease) is the advanced stage where the inflammation has spread below the gum and started to affect the bone that holds teeth in place. It is measured with the small ruler (a periodontal probe) that reads pocket depths in millimeters.

Abscess (an infection pocket) is a collection of pus from a bacterial infection, either at the tip of a root or in the gum. If you have swelling or throbbing pain, see the guidance on what to do about a tooth abscess.

Pulpitis (an inflamed nerve) is inflammation of the pulp. Reversible pulpitis means the nerve is irritated but can calm down; irreversible pulpitis means the nerve is dying and usually points toward a root canal.Pulpitis (an inflamed nerve) is inflammation of the pulp. Reversible pulpitis means the nerve is irritated but can calm down; irreversible pulpitis means the nerve is dying and usually points toward a root canal.

Cracked or fractured tooth (a break) ranges from a tiny craze line to a split that reaches the root. The treatment depends heavily on how deep the crack runs.Cracked or fractured tooth (a break) ranges from a tiny craze line to a split that reaches the root. The treatment depends heavily on how deep the crack runs.

Attrition and erosion (wear) describe worn-down teeth. Attrition is wear from grinding tooth against tooth; erosion is surface loss from acid, such as reflux or acidic drinks.Attrition and erosion (wear) describe worn-down teeth. Attrition is wear from grinding tooth against tooth; erosion is surface loss from acid, such as reflux or acidic drinks.

Impaction (a stuck tooth) means a tooth, most often a wisdom tooth, that cannot fully come in because it is blocked by bone or another tooth.Impaction (a stuck tooth) means a tooth, most often a wisdom tooth, that cannot fully come in because it is blocked by bone or another tooth.

Malocclusion (a bad bite) means the upper and lower teeth do not line up ideally, including crowding, overbite, or underbite.Malocclusion (a bad bite) means the upper and lower teeth do not line up ideally, including crowding, overbite, or underbite.

Treatments and Procedures

Prophylaxis (a prophy, or regular cleaning) is a routine cleaning for healthy gums, removing plaque and tartar above the gumline.Prophylaxis (a prophy, or regular cleaning) is a routine cleaning for healthy gums, removing plaque and tartar above the gumline.

Scaling and root planing (a deep cleaning) is a non-routine treatment for gum disease that cleans below the gumline and smooths the root surfaces. It is genuinely needed for real periodontitis, but it is also over-recommended, so it is worth understanding when it is warranted before agreeing. See do I really need a deep cleaning.

Filling or restoration (patching a cavity) is removing decay and filling the space. Composite is the tooth-colored material; amalgam is the older silver material. Both are valid; composite is now the most common.Filling or restoration (patching a cavity) is removing decay and filling the space. Composite is the tooth-colored material; amalgam is the older silver material. Both are valid; composite is now the most common.

Inlay or onlay (a partial cap) is a lab-made filling for a larger cavity that is bigger than a simple filling but smaller than a full crown.Inlay or onlay (a partial cap) is a lab-made filling for a larger cavity that is bigger than a simple filling but smaller than a full crown.

Crown (a cap) covers a whole tooth to protect it after major damage or a root canal. Crowns are sometimes recommended when a filling would do, so it helps to know when a crown is actually necessary.

Bridge (a fixed replacement) fills a gap from a missing tooth by anchoring a false tooth to the teeth on either side.Bridge (a fixed replacement) fills a gap from a missing tooth by anchoring a false tooth to the teeth on either side.

Veneer (a facing) is a thin shell bonded to the front of a tooth, usually for appearance.Veneer (a facing) is a thin shell bonded to the front of a tooth, usually for appearance.

Bonding (a quick repair) uses tooth-colored resin to fix small chips, gaps, or cosmetic flaws in one visit.Bonding (a quick repair) uses tooth-colored resin to fix small chips, gaps, or cosmetic flaws in one visit.

Root canal (endodontic therapy, or RCT) removes the infected or dying pulp from inside the tooth, cleans the canals, and seals them. It saves a tooth that would otherwise be lost.Root canal (endodontic therapy, or RCT) removes the infected or dying pulp from inside the tooth, cleans the canals, and seals them. It saves a tooth that would otherwise be lost.

Extraction (pulling a tooth) removes a tooth. A simple extraction lifts out a tooth that is fully in; a surgical extraction involves gum or bone work, common for impacted wisdom teeth.Extraction (pulling a tooth) removes a tooth. A simple extraction lifts out a tooth that is fully in; a surgical extraction involves gum or bone work, common for impacted wisdom teeth.

Implant (a replacement root) is a titanium post placed in the jaw to hold a crown, bridge, or denture.Implant (a replacement root) is a titanium post placed in the jaw to hold a crown, bridge, or denture.

Abutment (the connector) is the small piece that links an implant post to the crown on top.Abutment (the connector) is the small piece that links an implant post to the crown on top.

Bone graft (rebuilding bone) adds material to the jaw to build up bone, often to support a future implant.Bone graft (rebuilding bone) adds material to the jaw to build up bone, often to support a future implant.

Sealant (a protective coating) is a thin coating painted into the grooves of back teeth, mostly for children, to keep decay out.Sealant (a protective coating) is a thin coating painted into the grooves of back teeth, mostly for children, to keep decay out.

Fluoride (a strengthener) is a mineral treatment that hardens enamel and helps reverse the earliest decay.Fluoride (a strengthener) is a mineral treatment that hardens enamel and helps reverse the earliest decay.

Night guard or occlusal guard (a bite guard) is a custom plastic tray worn to protect teeth from grinding and clenching.Night guard or occlusal guard (a bite guard) is a custom plastic tray worn to protect teeth from grinding and clenching.

The Providers

General dentist (DDS or DMD) (your regular dentist) handles most routine and restorative care. DDS and DMD are the same degree with different names.General dentist (DDS or DMD) (your regular dentist) handles most routine and restorative care. DDS and DMD are the same degree with different names.

Endodontist (root canal specialist) focuses on the pulp and root canals.Endodontist (root canal specialist) focuses on the pulp and root canals.

Periodontist (gum specialist) treats gum disease and places many implants.Periodontist (gum specialist) treats gum disease and places many implants.

Orthodontist (braces specialist) straightens teeth and corrects the bite.Orthodontist (braces specialist) straightens teeth and corrects the bite.

Oral surgeon (surgery specialist) handles extractions, implants, and jaw surgery.Oral surgeon (surgery specialist) handles extractions, implants, and jaw surgery.

Prosthodontist (rebuilding specialist) focuses on complex crowns, bridges, and dentures.Prosthodontist (rebuilding specialist) focuses on complex crowns, bridges, and dentures.

Hygienist (the cleaning clinician) performs cleanings and gum measurements and teaches home care.Hygienist (the cleaning clinician) performs cleanings and gum measurements and teaches home care.

Billing and Insurance Codes

CDT code (the procedure number) is the five-character code (starting with the letter D) that identifies each procedure for insurance. These are set by the American Dental Association. A deeper walkthrough is in dental codes and billing explained.

Fee schedule (the price list) is the set of prices a dentist or insurer uses for each code.Fee schedule (the price list) is the set of prices a dentist or insurer uses for each code.

Allowed amount (what insurance recognizes) is the maximum your plan counts toward a procedure, which may be lower than the office fee.Allowed amount (what insurance recognizes) is the maximum your plan counts toward a procedure, which may be lower than the office fee.

Annual maximum (the yearly cap) is the most your plan will pay in a benefit year. Once you hit it, you pay the rest yourself.Annual maximum (the yearly cap) is the most your plan will pay in a benefit year. Once you hit it, you pay the rest yourself.

Deductible (your upfront share) is the amount you pay before the plan starts contributing.Deductible (your upfront share) is the amount you pay before the plan starts contributing.

Predetermination (a pre-treatment estimate) is a request sent to insurance before treatment so you can see the expected coverage in advance. Asking for one is smart for any large plan.Predetermination (a pre-treatment estimate) is a request sent to insurance before treatment so you can see the expected coverage in advance. Asking for one is smart for any large plan.

In-network vs out-of-network (contracted or not) describes whether your dentist has agreed to your insurer's rates. Out-of-network usually means higher out-of-pocket cost.In-network vs out-of-network (contracted or not) describes whether your dentist has agreed to your insurer's rates. Out-of-network usually means higher out-of-pocket cost.

EOB (explanation of benefits) is the statement from your insurer after a claim showing what was billed, allowed, paid, and what you owe. It is not a bill.EOB (explanation of benefits) is the statement from your insurer after a claim showing what was billed, allowed, paid, and what you owe. It is not a bill.

X-Rays and Records

Radiograph (an X-ray) is the formal word for a dental X-ray image.Radiograph (an X-ray) is the formal word for a dental X-ray image.

Bitewing (BW) (the cavity-check X-ray) shows the crowns of the back teeth and is best for spotting decay between teeth.Bitewing (BW) (the cavity-check X-ray) shows the crowns of the back teeth and is best for spotting decay between teeth.

Periapical (PA) (the whole-tooth X-ray) shows one or two teeth from crown to root tip, used to check the root and surrounding bone.Periapical (PA) (the whole-tooth X-ray) shows one or two teeth from crown to root tip, used to check the root and surrounding bone.

Panoramic (the wide X-ray) is a single broad image of the whole jaw, useful for wisdom teeth and overall structure.Panoramic (the wide X-ray) is a single broad image of the whole jaw, useful for wisdom teeth and overall structure.

CBCT (a 3D scan) is a cone-beam scan that gives a three-dimensional view, common before implants or surgery. To learn what all these look like, see the dental X-ray interpretation guide for patients.

Watch (monitor) means a spot is not bad enough to treat yet, so the dentist will keep an eye on it over time rather than drilling now.Watch (monitor) means a spot is not bad enough to treat yet, so the dentist will keep an eye on it over time rather than drilling now.

WNL (within normal limits) is a note meaning that area looks normal and healthy.WNL (within normal limits) is a note meaning that area looks normal and healthy.

FAQ

What is the difference between a natural crown and a crown restoration? The natural crown is simply the visible top of your tooth above the gum. A crown restoration is a lab-made cap cemented over a damaged tooth. Same word, so always confirm which one your dentist means.What is the difference between a natural crown and a crown restoration? The natural crown is simply the visible top of your tooth above the gum. A crown restoration is a lab-made cap cemented over a damaged tooth. Same word, so always confirm which one your dentist means.

Is a deep cleaning the same as a regular cleaning? No. A regular cleaning (prophylaxis) is routine maintenance for healthy gums. A deep cleaning (scaling and root planing) is a treatment for gum disease that cleans below the gumline. Because it is sometimes recommended when it is not clearly needed, it is reasonable to ask what your gum pocket measurements were first.Is a deep cleaning the same as a regular cleaning? No. A regular cleaning (prophylaxis) is routine maintenance for healthy gums. A deep cleaning (scaling and root planing) is a treatment for gum disease that cleans below the gumline. Because it is sometimes recommended when it is not clearly needed, it is reasonable to ask what your gum pocket measurements were first.

What does it mean when my dentist says "watch" a tooth? It means the spot is too early or too minor to treat now, so it will be monitored at future visits rather than filled immediately. It is a normal, conservative approach.What does it mean when my dentist says "watch" a tooth? It means the spot is too early or too minor to treat now, so it will be monitored at future visits rather than filled immediately. It is a normal, conservative approach.

Why does my treatment plan have five-digit codes on it? Those are CDT codes, the standard American Dental Association numbers that identify each procedure for insurance billing. Every filling, cleaning, or crown has one.

What is the difference between mesial, distal, buccal, and lingual? They describe which surface of a tooth is involved. Mesial faces the front midline, distal faces the back, buccal (or facial) faces the cheek, and lingual faces the tongue. They tell you exactly where a cavity or filling is located.What is the difference between mesial, distal, buccal, and lingual? They describe which surface of a tooth is involved. Mesial faces the front midline, distal faces the back, buccal (or facial) faces the cheek, and lingual faces the tongue. They tell you exactly where a cavity or filling is located.

How can I be sure a recommended treatment is really necessary? Ask for the diagnosis behind each item and, for larger work, a predetermination from insurance. You can also get an independent treatment plan review from a dentist who is not doing the work, using your own X-rays and plan.

Final Advice

You do not need a dental degree to understand your own mouth. Keep this glossary handy, and when a plan still does not add up, get a neutral translation. Upload your treatment plan and X-rays to toothcheck for a plain-English independent second opinion from a licensed dentist, in writing, within under 72 hours. If you want help reading the plan itself first, start with how to read your dental treatment plan. Clear information, no pressure. For general basics, the ADA also runs MouthHealthy.

Last medically reviewed: July 2026Last medically reviewed: July 2026