Gentle & unhurried No hard sell, ever PPO accepted Caring for San Mateo & the Peninsula since 2011
Home / Sleep Center
Deccan Dental Sleep CenterDeccan Sleep Center

Rest better, breathe easier

Snoring and sleep apnea don’t just disrupt your night. They affect your health. We treat them with custom oral appliances, a proven alternative to CPAP for many patients, led by Dr. Samir Nanjapa, a Diplomate of the American Board of Dental Sleep Medicine.

Ask about sleep careCall (650) 212-3500
The basics

What is sleep apnea?

Obstructive sleep apnea (OSA) happens when the airway repeatedly narrows or collapses during sleep, briefly interrupting breathing, sometimes dozens of times an hour. It fragments your sleep and strains your body, often without you realizing it. Loud, habitual snoring is frequently the most noticeable sign.

Only a physician can diagnose sleep apnea, usually with an overnight sleep study in a lab or a home sleep test. If the signs below sound familiar, it’s worth a conversation.

Could this be you?

Signs worth acting on

✓ Loud, habitual snoring
✓ Pauses or gasping during sleep
✓ Waking unrefreshed or with headaches
✓ Daytime fatigue or trouble focusing
✓ CPAP you struggle to tolerate
✓ A partner disturbed by your snoring
The treatment

A comfortable alternative to CPAP

An oral appliance is a custom device, similar to a sports mouthguard, worn only while you sleep. It holds the lower jaw slightly forward, which keeps the airway open so you breathe, and sleep, more easily. The type we use is called a mandibular advancement device. No mask, no hose, no machine, and it fits easily in a travel bag.

Who it’s a good fit for

✓ Mild to moderate obstructive sleep apnea
✓ People who can’t tolerate CPAP or don’t use it consistently
✓ People who would rather not use a machine
✓ Sleep apnea that isn’t fully controlled on CPAP
✓ Loud snoring without significant sleep apnea

When it may not be the right choice

For severe sleep apnea, CPAP is usually recommended first. An appliance also needs enough healthy, stable teeth to hold onto, and some jaw joint problems need to be addressed before starting. We check all of this at your evaluation and discuss the options with your sleep physician.

Your sleep dentist

Led by a board-certified sleep dentist

Dr. Samir Nanjapa, DDS, MS, DABDSM, sleep dentist and prosthodontist in San Mateo

Dr. Samir Nanjapa, DDS, MS, DABDSM

Dr. Nanjapa is a prosthodontist and a Diplomate of the American Board of Dental Sleep Medicine. He holds an MS in Dental Biomaterials and is a professor at the UCSF School of Dentistry. As a prosthodontist, he is used to treating patients with crowns, bridges, implants and complex bites, which matters when fitting an appliance that rests on your teeth every night.

He works with a dedicated sleep team that handles everything from insurance paperwork to follow-up visits. Read Dr. Nanjapa’s full profile.

What to expect

Your treatment, step by step

Your physician diagnoses, we provide the treatment, and your physician confirms the result, following the guidelines of the American Academy of Sleep Medicine (AASM) and the American Academy of Dental Sleep Medicine (AADSM).

1

Your physician diagnoses

A sleep physician confirms sleep apnea with a sleep study, in a lab or at home, and writes a letter of medical necessity. If you tried CPAP, those notes help too.

2

We evaluate

A full dental exam, a record of your jaw joints and bite before treatment, an airway-focused assessment and digital 3D scans.

3

We fit and adjust

Your custom appliance is usually ready about 10 days after your first visit. We fit it for comfort, explain how it’s advanced in small steps until it’s working well, and give you a morning aligner that helps keep your bite stable.

4

Your physician confirms

Once the appliance is adjusted, your sleep physician usually orders a follow-up sleep test to confirm it’s working. We keep seeing you for regular checks.

The appliances we use

Chosen for you, not from one catalog

Glidewell Silent Nite oral appliance
Glidewell Silent Nite®
SomnoDent Flex oral appliance
SomnoDent Flex®

We don’t commit to one manufacturer. After your evaluation, we choose the design that suits your teeth, jaw and how you sleep. Options we use include the SomnoDent range (Fusion, Flex, Classic and Herbst Advance), Silent Nite, Herbst appliances, the Lamberg SleepWell and the Dream Tap.

Every appliance is custom-made from scans of your teeth and can be adjusted in small steps. We don’t use prefabricated or over-the-counter devices.

The evidence

What the research shows

✓ Oral appliances significantly reduce breathing interruptions during sleep
✓ Several trials show blood pressure reductions similar to CPAP
✓ Improvements in daytime sleepiness and quality of life are similar to CPAP
✓ Patients tend to keep wearing them: in one long-term study, 86% were still using their appliance after an average of 3.3 years

CPAP removes more breathing events in a sleep lab, but it only works on the nights it’s worn. Because people tend to wear oral appliances more consistently, their overall benefit can be similar for many patients with mild to moderate sleep apnea.

Selected references: Ramar et al., AASM/AADSM clinical practice guideline, J Clin Sleep Med 2015; Phillips et al., Am J Respir Crit Care Med 2013; Sutherland et al., J Dent Sleep Med 2015; Vanderveken et al., Thorax 2013.

Before your visit

What to bring

Bring what you have. We’ll help with the rest and coordinate with your physician.

✓ A referral or letter of medical necessity from your sleep physician (noting CPAP intolerance, if applicable)
✓ Your most recent sleep study report
✓ A list of current medications
✓ Your medical insurance information
Insurance & payment

We accept most medical insurance

Because obstructive sleep apnea is a medical condition, oral appliance therapy is usually billed through medical insurance, not dental. We work with most medical plans, including Medicare, UnitedHealthcare, Aetna, Cigna, Humana and Kaiser Permanente. Coverage depends on your plan, diagnosis, documentation and medical-necessity requirements.

✓ We help you get the most from your medical benefits for CPAP alternatives.
✓ No-interest payment plans for patients paying out of pocket.
✓ Our team handles the paperwork with your physician and insurer, start to finish.
Why it matters

The risks of leaving it untreated

Risks of sleep apnea

Untreated OSA is linked to high blood pressure, heart disease and stroke, type 2 diabetes, daytime drowsiness (including drowsy driving), and problems with mood, memory and focus.

Risks of snoring

Beyond disrupting your and your partner’s sleep, habitual snoring can be an early warning sign of underlying sleep apnea that’s worth evaluating.

For physicians

Referring a patient

We work with sleep physicians, pulmonologists, ENTs and primary care doctors across the Peninsula. Please send the sleep study (PSG or home sleep test), CPAP trial notes if applicable and a letter of medical necessity for oral appliance therapy.

Fax (650) 212-3505 or email info@mydeccandental.com. We send you our evaluation findings, keep you updated through adjustment, and coordinate the follow-up sleep test so you can confirm the result.

Questions

Sleep FAQs

Who will I see for sleep apnea treatment?+

Dr. Samir Nanjapa leads the Deccan Sleep Center. He is a prosthodontist, a Diplomate of the American Board of Dental Sleep Medicine and a professor at the UCSF School of Dentistry.

Is an oral appliance as effective as CPAP?+

CPAP removes more breathing events in a sleep lab, but many people struggle to wear it every night. Because patients tend to wear oral appliances more consistently, studies show similar real-world results for many people with mild to moderate sleep apnea. For severe sleep apnea, CPAP is usually tried first. We decide together with your sleep physician.

Do you diagnose sleep apnea?+

No. A physician diagnoses sleep apnea with a sleep study, either overnight in a sleep lab or at home with a home sleep test. We provide the oral appliance treatment and work alongside your sleep physician.

Do I need a sleep study first?+

Yes. Oral appliance therapy for sleep apnea needs a diagnosis from a physician, and insurance requires it as well. If you haven’t been tested, call us and we’ll explain how to get started with a sleep physician.

Does insurance cover oral appliance therapy?+

Usually, through your medical insurance rather than your dental plan, because sleep apnea is a medical condition. We work with most medical plans, including Medicare. We check your benefits and handle the paperwork with your physician and insurer.

What does it cost without insurance?+

It depends on the appliance and the number of follow-up visits you need. After your evaluation we give you a written estimate, and no-interest payment plans are available.

How long until I get my appliance?+

Most patients need just two visits. At the first, we do your evaluation and digital scans. Your appliance is usually ready about 10 days later, sometimes sooner, and we fit it at the second visit. If your insurance requires preauthorization, that can add time, and our team will keep you updated.

Is the appliance comfortable to wear?+

Custom appliances are small, made for your mouth and worn only while you sleep. Most people need a short adjustment period, and we fine-tune the fit at follow-up visits.

Are there side effects?+

Some people have mild jaw or tooth soreness in the morning, or extra saliva at first, which usually settles within a few weeks. Over years of use the bite can shift slightly, so we give you a morning aligner to wear for a few minutes after waking and check your bite at follow-up visits.

How long does an oral appliance last?+

With good care, often several years. We check its condition and fit at your regular follow-ups and let you know when it needs repair or replacement.

Can I use an oral appliance with CPAP?+

Yes, for some people. An appliance can help when sleep apnea isn’t fully controlled on CPAP alone, and some CPAP users wear an appliance when they travel. Your sleep physician decides what fits your situation.

Will it work if I have crowns, implants or missing teeth?+

Often, yes. The appliance needs enough stable teeth to hold onto, and crowns and implants are usually fine. As a prosthodontist, Dr. Nanjapa regularly treats patients with complex dental work. If you have no natural teeth, a standard appliance usually isn’t an option, and we’ll talk through alternatives with your physician.

Is a store-bought snoring mouthguard the same thing?+

No. Over-the-counter guards aren’t custom-fitted or precisely adjustable, can strain the jaw or move teeth, and aren’t a treatment for sleep apnea. We only use custom-made, adjustable appliances.

Can an appliance help with snoring if I don’t have sleep apnea?+

Yes. Custom appliances are very effective for loud, habitual snoring. We still recommend a sleep test first, because snoring is often the most noticeable sign of sleep apnea.

How do I get started?+

Call us with your sleep study and your physician’s referral if you have them. If you haven’t been tested yet, we’ll explain how to get a sleep study and take it from there.

Medically reviewed by Dr. Samir Nanjapa, DDS, MS, DABDSM · October 2026

Ready to sleep better?

Bring your sleep study, or ask us how to get tested. We’ll handle the rest, including your insurance.

CallBook now