Night Guard for Teeth Grinding: Custom vs. Store-Bought Cost

Bruxism -- the clinical term for grinding or clenching teeth, most commonly during sleep -- affects an estimated 8 to 31 percent of the general adult population, according to American Sleep Association data cited in peer-reviewed dental literature. The primary protective appliance dentists recommend for bruxism is an occlusal guard, commonly called a night guard. This guide explains the difference between custom and over-the-counter options, what each typically costs, and when one approach may be more appropriate than the other.

What Is a Night Guard and Who Needs One?

A night guard (also called an occlusal guard or bruxism appliance) is a removable oral appliance worn over the teeth during sleep. Its purpose is to create a physical barrier between the upper and lower teeth, reducing direct tooth-to-tooth contact and distributing grinding forces across the appliance material rather than the tooth enamel.

The American Dental Association (ADA) notes that bruxism can lead to measurable tooth wear over time, including flattening of the biting surfaces, enamel erosion, and in more severe cases, tooth fractures or damage to existing dental restorations such as crowns, veneers, and fillings. Patients who grind heavily enough to crack or chip teeth are sometimes identified as candidates for night guards before visible symptoms develop, based on wear patterns visible during a routine exam.

Night guards are most commonly recommended by dentists for patients who show clinical evidence of tooth grinding or clenching. Self-diagnosis is difficult because bruxism typically occurs during sleep without the person's awareness.

Illustration: approximate cost ranges by night guard type. Custom dentist-made guards cost more upfront but offer a precise fit and longer durability.

Custom Night Guard Cost vs. Over-the-Counter Options

The central choice for most patients is between an over-the-counter (OTC) night guard available at a pharmacy and a custom-fabricated appliance made from dental impressions taken in a dental office.

Custom night guards are made from an impression of the patient's specific dentition, either taken in the dental office and sent to a dental lab, or produced in-office using digital scanning and same-day fabrication. The result is an appliance that fits the exact shape of the patient's upper or lower arch. Custom guards are typically made from harder acrylic material, softer flexible thermoplastic, or a combination (hard exterior, soft interior). Dentist-fabricated custom guards generally cost $200 to $600, based on Academy of General Dentistry published cost guides and ADA fee survey data. The fee typically includes impressions, lab fabrication, and a fitting appointment at which the guard is adjusted for comfort and bite.

Over-the-counter night guards are available in two main forms. Boil-and-bite guards are softened in hot water, placed in the mouth, and bitten down upon to create a rough impression of the teeth. Ready-made guards come in standard sizes and are not customized. OTC guards typically cost $10 to $100, depending on brand and materials. They require no dental visit, but their fit is less precise and they often add more bulk than a custom appliance, which some patients find uncomfortable.

Sources: ADA Health Policy Institute fee survey; Academy of General Dentistry published cost guides. Durability estimates are general ranges; individual experience varies depending on grinding severity.

What Is Bruxism and How Common Is It?

Bruxism refers to repetitive jaw muscle activity involving grinding, clenching, or bracing of the teeth. The American Sleep Association categorizes sleep bruxism as a sleep-related movement disorder. The National Institute of Dental and Craniofacial Research (NIDCR) notes that bruxism is one of the most common sleep disorders, though prevalence estimates vary because many individuals are unaware they grind.

A review of epidemiological data published in peer-reviewed dental literature suggests that sleep bruxism affects approximately 8 to 13 percent of adults, with some estimates ranging higher when milder forms are included. The condition appears to be more common in younger adults and tends to decrease with age.

Possible contributing factors associated with bruxism in the dental and sleep literature include:

• Psychological stress and anxiety
• Certain medications, particularly some antidepressants and stimulant medications (discussed in prescribing information and dental literature)
• Sleep disorders, including obstructive sleep apnea
• Caffeine and alcohol use patterns
• Bite irregularities in some cases

The NIDCR notes that the causes of bruxism are not fully understood and that research into effective treatments is ongoing. A dentist who observes signs of bruxism can refer patients to a sleep specialist if sleep apnea or another underlying sleep disorder is suspected.

What Damage Can Teeth Grinding Cause?

The clinical concern with untreated bruxism is cumulative damage to teeth and supporting structures over months and years. The Academy of General Dentistry (AGD) patient education materials describe the following potential consequences of chronic bruxism without protective intervention:

Enamel wear. Grinding gradually erodes the hard outer surface of teeth. Enamel does not regenerate, and once worn, the more sensitive dentin layer beneath becomes exposed, increasing sensitivity and vulnerability to decay.

Flattened or fractured teeth. Heavy, prolonged grinding can flatten the biting surfaces of back teeth and, in severe cases, cause small cracks or fractures in tooth structure. Cracked teeth may require crowns or, if the crack extends deep enough, extraction.

Damage to existing restorations. Night guards are particularly important for patients with existing dental work such as crowns, bridges, or porcelain veneers, which can be damaged by sustained grinding forces. Our guide on how long dental crowns last covers how grinding affects crown lifespan.

Jaw muscle soreness and TMJ stress. Chronic clenching strains the jaw muscles and can contribute to temporomandibular joint (TMJ) pain or dysfunction. For a detailed overview of TMJ disorder symptoms and treatment, see our guide on TMJ disorder symptoms, treatment, and cost.

Illustration: four categories of potential long-term consequences from untreated bruxism, based on Academy of General Dentistry patient education materials.

Does Insurance Cover Night Guards?

Coverage for custom dental night guards varies significantly by insurance plan. Some plans cover a portion of the cost when the guard is prescribed for documented bruxism; others exclude it as a non-covered service.

The relevant billing code for a custom hard acrylic occlusal guard is CDT code D9940. When calling your insurer to ask about coverage, providing this code helps the representative pull the correct benefit information. Questions worth asking:

• Is CDT code D9940 a covered benefit under my plan?
• If covered, at what percentage (as a basic or major service)?
• Is there a specific clinical requirement -- such as a bruxism diagnosis in the chart -- for coverage to apply?
• Does coverage apply to both upper and lower arch guards, or only one?

Some dental offices will submit a pre-treatment estimate to your insurer before fabricating the guard, which gives you a clearer picture of your expected out-of-pocket cost. For a broader overview of managing dental expenses, our guide on cost of dental care without insurance covers low-cost care options and discount programs.

How Long Does a Custom Night Guard Last?

The lifespan of a custom night guard depends primarily on the severity of the patient's grinding and the material used. Hard acrylic guards designed for heavy grinders typically last three to five years with regular cleaning and professional check-ins. Soft material guards, which are preferred by some patients for comfort, tend to wear faster under heavy grinding -- sometimes within one to two years.

The Academy of General Dentistry recommends bringing the night guard to dental checkups so the dentist can evaluate its wear and confirm that the fit is still appropriate. A guard that has worn unevenly can potentially affect the bite if it is not adjusted or replaced. Replacing a worn guard, while an added cost, is substantially less expensive than repairing or replacing cracked teeth or damaged restorations.

Questions to Ask Your Dentist About Teeth Grinding

If you suspect you grind your teeth or your dentist mentions signs of wear, asking specific questions at your appointment helps you understand what is happening and what your options are.

Questions to consider:

• What signs of bruxism are you seeing in my mouth, and how significant is the wear?
• Would a custom night guard be appropriate for my situation?
• Which material do you recommend -- hard acrylic, soft, or a combination -- and why?
• Is a night guard likely to be covered by my insurance plan?
• Should I also be evaluated for sleep apnea, or are there other contributing factors to address?
• How often should the guard be checked or adjusted?