If you are looking for a dental home in Westchester County, we invite you to visit ours. Dr. Wanda Mejia and Dr. George Sepiashvili are experienced cosmetic dentists with an international background in leading-edge dentistry. Dr. George graduated from the University of St. Petersburg. Dr. Wanda graduated from the Dental University in Santo Domingo. Then both got degrees at New York University, where they met and fell in love, both with each other and New York. Since then, they have pursued advanced training in dental implants, cosmetic dentistry, and neuromuscular dentistry.

If you are in the Westchester County, Peekskill, or Yorktown, New York area, and are in need of general or cosmetic dental care, please call (914) 526-2144 or email Advanced Dentistry of Mohegan Lake to schedule an appointment.

Highlights, Specialties & Features

  • TMJ Treatment
  • Dentures
  • Dental Implants
  • Cosmetic Dentisty

Professional Associations & Certifications

  • Advanced Implant Therapy & Grafting
  • Enteral Conscious Sedation
  • The Physiologic Approach to Treating OSA – Level II
  • The Physiologic Approach to Treating OSA – Level I
  • Practical Advanced TMD Practice- Level 1
  • New You Dentures
  • Core VII – Full Mouth Reconstruction – Essential Tools for Finalization of Physiologic Rehabilitatio
  • Core VI – Coronoplasty and Case Finishing
  • Core V – Comprehensive Aesthetic Occlusal Reconstruction
  • Core III – Mastering Dynamic Adhesion in Complex Reconstructive Cases
  • Core IV – Advanced Principles, Case Stabilization and Bite Transfer in the Physiologic Practice
  • Core II Orthotic Maintenance, Adjustment and Essential Aesthetic Reconstructive Techniques
  • Core I – Advanced Functional Physiologic Dentistry
  • American Dental Association (ADA)
  • New York State Dental Association (NYSDA)
  • International Association of Physiologic Aesthetics (IAPA)
  • International College of Oral Implantologists (ICOI)
  • Full Face Orthodontics “F2O” Physiologic Orthodontics
  • Practical Advanced TMD Practice- Level 2
  • Introduction to NM Ortho Mechanics (Ortho II)
  • Neuromuscular Pediatric Orthodontics
  • Digital Diagnostic Basic Training
  • Contemporary Treatment of the Atrophic Posterior

Serviced Areas

  • Mohegan Lake New York, Westchester County New York, 10501, 10505, 10511, 10516, 10517, 10520, 10524, 10526, 10527, 10535, 10536, 10537, 10541, 10545, 10546, 10547, 10548, 10549, 10566, 15067, 10578, 10579, 10588, 10589, 10596, 10598, 10911

Payment Options

  • American Express, Credit Terms Available, Debit Cards, Discover, MasterCard, Personal Checks, VISA

Contact Details

  Person Dr. George Sepiashvili
  City Mohegan Lake , NY
  Zip Code 10547
  Address 1966 East Main Street
  Phone Number (914) 526-2144

Business Representative

Dr. George Sepiashvili

Westchester County Cosmetic Dentist

Cosmetic dentist Dr. George Sepiashvili was born in Georgia—the country, not the state—in the Caucasus Mountains. He went to Russia for his first dental education, receiving a degree in dentistry from the University of St. Petersburg. He then moved to New York City, where he studied at New York University, receiving another degree in dentistry. He followed this up with a two-year residency focused on dental implants.

His passion for quality dental care has led him to continue his dental education at some of the most prestigious dental education institutions in the world, such as the Las Vegas Institute for Advanced Dental Studies (LVI), where he studied advanced cosmetic dentistry as well as neuromuscular dentistry. He has been certified in Invisalign, has training in obstructive sleep apnea treatment, and has taken the New You Dentures™ course.

Products & Services

Migraine Treatment

If you are one of the millions of Americans suffering from frequent migraine headaches, you know how debilitating they can be. To treat migraine pain, many people look to prescription medications which serve to dull the pain. However, the side effects can also interrupt your ability to work and enjoy life. What’s more, these medications can become addictive and result in internal damages, all without addressing the underlying problem.

A common cause of migraine headaches is TMJ, a disorder in the jaw joint that can produce pain throughout the face, head, and neck. If TMJ is the cause, only a neuromuscular dentist can provide you with the treatment you need for long-term relief.


It often produces its most obvious symptoms in and around the jaw. Common TMJ symptoms include:

-Clicking or popping in the jaw joint
-Pain or swelling around the jaw
-Limited jaw movement

However, because major nerves that run through your jaw also run through your entire face, symptoms can be far-ranging. They may include things such as migraine-type headaches and pressure in the ears and eyes as well. Some studies indicate that as much as 80% of TMJ sufferers also experience ear-related symptoms, such as tinnitus, ear pain, ear fullness, vertigo, or dizziness.

This joint condition is often detected during your regularly scheduled dental visits to our office. If you experience any of the symptoms in between visits you should contact our office at 914-332-4402 to schedule a neuromuscular evaluation with Dr. Wanda as soon as possible.

General Dentistry

The health of your teeth and gums relies on more than a good dental hygiene routine. In fact, the entire branch of general dentistry is focused on preventing, detecting, and treating oral health issues, helping ensure your teeth remain strong for a lifetime.

However, general dentistry is about more than just the health of your mouth. Several studies have found that infections in the teeth and gums can heighten your risk for certain heart conditions as well as complicate preexisting medical conditions such as diabetes.

Teeth Whitening

Teeth whitening will brighten your smile. Tooth discoloration is perhaps the most common cosmetic dental problem dealt with at our comfortable Tarrytown office. Because so many factors can combine to make teeth dingy, discolored, or stained, and a regular dental hygiene routine is often ineffective at addressing these issues, more people look to teeth whitening solutions every year.


Snoring is caused by narrowing of your airways. When your airways are broad, air flows smoothly through them. When your airway narrows, the airflow becomes turbulent, causing your tissues to vibrate, which is what we hear as the sound of snoring. There are many reasons why your airway might narrow, including:

-Narrow nasal passage
-Large soft palate
-Sagging tongue

Large throat poorly supported by the jaw
Of these, the last two tend to be the most serious. They have the most potential to seriously restrict and even close your airway.

Porcelain Veneers

Porcelain veneers, also known as dental veneers, offer one of the most effective solutions for addressing common cosmetic dental problems. These wafer-thin shells are custom created by our dental lab partners to cover cosmetic imperfections and produce a seamlessly beautiful appearance to teeth that are:

-Unevenly spaced or crooked
-Irregularly shaped or sized
-Chipped or cracked
-Discolored underneath the enamel


Many of our patients find Invisalign preferable to traditional braces for aesthetic reasons. However, the invisibility of these aligners is far from their only benefit. Because they can be removed, the trays offer many benefits including:

-Removable for special occasions
-No dietary restrictions
-No interference with dental hygiene

In addition, soft plastic aligners are much more comfortable than hard metal braces and will not cut or irritate sensitive oral tissue. Many people also find switching aligners to further treatment less invasive than the manual adjustments required for wire and bracket braces. However, most people experience slight discomfort with Invisalign. It’s usually worse when you first switch aligners. Typically, you can control discomfort with over-the-counter pain medicine.

Sleep Apnea

Sleep apnea is a serious medical condition in which breathing stops for several seconds at inconsistent intervals while you are sleeping. With central sleep apnea, this is caused by miscommunication between your brain and your breathing muscles. This condition often requires medical devices such as CPAP machines that provide a continuous flow of oxygen while you are sleeping. Tarrytown sleep apnea dentists can assist you in treating your symptoms.
Obstructive sleep apnea is caused when your airways are blocked by overly relaxed muscles in your mouth and throat. CPAP machines are often unnecessary for the treatment of this more common form.

Treating obstructive sleep apnea may require little more than a customized orthotic device that is worn while you are sleeping. Dr. Wanda Mejia and Dr. George Sepiashvili can work with your sleep doctor to determine if this solution would be effective for you.

Smile Makeover

Dr. Wanda and Dr. George received their cosmetic training at the prestigious Las Vegas Institute for Advanced Dental Studies (LVI) . As LVI-trained dentists, they have access to the LVI smile catalog, an incredibly useful tool in the planning of your perfect smile makeover.

The LVI smile catalog includes pictures of different shapes of anterior (front) teeth. This allows us to work together closely. We can consider and hand-pick the type of smile you find most attractive. Plus, we can use the tool to provide our dental lab partners with a visual aid that ensures you always get the exact smile you desire.

We value your input and strive to provide you with the highest level of service. By taking your goals into account and combining your desires with your cosmetic dentist’s experience in aesthetic and functional dentistry, we can tailor your treatment options to tackle even the most nuanced imperfections, producing a smile you’ll be proud to show off.

Cosmetic Dentistry

Every smile has unique needs and no single option is ever ideal for every problem. Dr. Mejia is an experienced cosmetic dentist who strongly believes in providing individual attention to each patient she sees. When you come to our office, Dr. Mejia will take the time necessary to understand your particular concerns and work to customize your services to meet your specific needs. This may include combining general and cosmetic dentistry services as well as correcting underlying issues such as malocclusion or TMJ.

Our primary concerns are your health and happiness. Working with you on a personal basis, we are confident we can provide you with all of the services you need to obtain and maintain a stunningly beautiful smile.

Root Canal

The state-of-the-art technology used by Dr. Mejia at Advanced Dentistry can often spot infection during your regularly scheduled dental hygiene visits. However, symptoms of infection include:

-Increased sensitivity
-Tooth discoloration
-Swelling of the gums

Formation of an abscess (like a pimple on your gums)
If you are experiencing any of the signs of tooth infection, please call us at 914-332-4402 to schedule an examination today.


One common complaint about dentures is that they make you look old. But they don’t have to. The problem is that most dentures aren’t made to accommodate for the loss of volume in your lower face that comes with tooth loss. Not only are your teeth lost, but your jawbone loses volume because it isn’t supporting teeth so the body removes what it considers to be “unnecessary” bone. When this happens, your face can shrink, and if your dentures don’t replace that lost volume, you can end up with:

-A sunken appearance
-Hanging jowls
-Deep facial folds around the mouth
-“Witch’s chin”

Our denture dentists use neuromuscular dentistry to figure out the original dimensions of your teeth and jawbone. They “read” your jaw muscles to discover the optimal vertical dimension of your face. This means they replace volume lost not just in your teeth, but your jawbone as well. This restores your face to its youthful proportions, which can dramatically reverse the apparent aging of your face.

Functional Orthodontics

Functional orthodontics offers many benefits above and beyond straight teeth. With functional orthodontics, we can achieve:

-Balance between the upper and lower jaws
-Improved facial appearance
-A healthy bite
-An open airway
-Results without surgery or tooth extraction

One of the key problems facing children as they grow is that their jaws aren’t developing in balance. One jaw is typically developing more than the other. With functional orthodontics, we can expand the jaw with deficient development to match the more developed jaw. This improves the appearance of a weak chin, receding chin, or jutting chin.

Implant Dentures

How can you use just four dental implants to do the work of the 14-16 teeth? There are two secrets. First, the strength of the materials. Dental implants are made of titanium, which means that individually they’re stronger than your natural tooth roots and capable of supporting more force. The bridge itself is made of some of the most advanced zirconia ceramics with a solid titanium substructure.

Second, it’s the placement of the dental implants that allows for restoration of the entire arch with just four dental implants. Years of study have shown the places where your body is most likely to retain bone, even if you lose your teeth or have gum disease. Two of the implants are placed in the front of the mouth, and two of them in the rear. These rear implants will have to bear most of the bite force, so they’re angled to give them maximum support in your bone.

Reconstructive Dentistry

The goal of reconstructive dentistry is usually to make your smile as close as possible to the way it was before it was damaged. There are many potential causes of smile damage:

-Dental decay
-Dental erosion
-Bad bite
-Traumatic accident

Each comes with its own pattern of damage which requires a special approach to fix. But these types of damage are fixable, and it’s vital that they are fixed.

Damage to your smile is more than just a physical harm. It can be emotionally damaging, especially if you’ve lost one or more teeth. Your smile is a vital part of your self-image, as well as a vital part of how others see you. Restoring it can help you achieve a full physical and emotional recovery.

Dental Implants

Whether used as a foundation for a dental crown or to support full or partial dentures, dental implants provide superior hold for full functional and aesthetic restoration.

Unlike dentures that sit on top of the gums or dental bridges that rely on adjacent teeth for support, dental implants are placed directly into your jawbone. This allows dental implants to provide benefits including:

-No risk of slipping or falling out
-No damage or reliance on adjacent teeth
-Maximum restoration of biting and chewing abilities
-Natural looking, superior aesthetics

However, the largest benefit of dental implants is that they replace your tooth’s root. This makes dental implants the only tooth replacement option that not only restores function and beauty, but prevents bone loss in the jaw, allowing implants to preserve your natural facial structure.

Jaw Pain

Probably the most common source of jaw pain in TMJ is sore and tired muscles. With this type of jaw pain, you will likely notice your jaw pain comes and goes in relation to jaw activity. It gets worse after eating or talking, and especially if you are clenching your teeth due to stress. You may also notice your jaw hurts a lot when you wake up in the morning due to clenching your jaws at night. Other times, though, you might just experience a constant, dull ache.

Your jaw muscles typically work together in teams. When your jaw system is in alignment, these muscles help each other efficiently. If your jaw is out of balance, though, your jaw muscles won’t be helping each other—they might even be working against one another. If your jaw is enough out of balance, your muscles won’t be able to find a comfortable rest position. This means that your muscles are constantly working, even if you think your jaw is idle.

Tense muscles often spread tension to muscles they work with in the head and neck, leading to headaches and neck pain.

Sedation Dentistry

Anxiety about visiting the dentist keeps many people from getting regular dental care. Sometimes it even drives people to avoid treating tooth pain until they can no longer stand it. Waiting causes severe damage to occur, including gum disease, bone damage, and tooth loss. Your dental visits don’t have to strike fear in your heart, sedation dentistry can make your dental visit a calming experience.

If you experience high levels of anxiety, or have other conditions that make visiting the dentist an ordeal, you might benefit from sedation dentistry. This calming procedure allows you to relax during your visit so that you can get the dental care you need. We also offer NuCalm relaxation dentistry to patients who commonly feel dental anxiety.

Family Dentistry

Family dentistry can be better for your oral health. The family that eats together stays together, but it also develops cavities together. When we treat your whole family, we can see how this affects you. That lets us make recommendations about diet changes or other lifestyle changes that can benefit everyone’s oral health.

We can also look out for genetic risks in your family. Gum disease relates to how your body responds to oral bacteria. This is partly controlled by your genes. So if parents have gum disease, we know to watch for it in children. The same is true for bite problems like TMJ.

Hygiene & Cleaning Visits

Your at-home routine should be consistent, but must be complemented by visits to our office for optimal oral health. These visits should take place every six months and will include a professional cleaning along with a thorough examination of your teeth and gums.

The examination performed by Dr. Wanda or Dr. George is essential for detecting small problems before they become serious issues. When caught early on, even serious problems like gum disease can easily be treated, helping keep your teeth healthy and beautiful for years to come.

Our professional general dentistry services may include routine cleanings and examinations. They may also include treatments such as:

-Dental fillings
-Root canals
-Dental crowns

The services you require will be based on your unique needs and customized to help preserve your natural teeth and keep your smile strong and healthy.

Tooth-Colored Fillings

We offer two types of tooth colored fillings. One is made from a composite resin and the other is made from advanced ceramics similar to all ceramic dental crowns or porcelain veneers. This type is called dental inlays and onlays. This allows Dr. Mejia to preserve much more of your natural tooth structure. Temperature fluctuations in your mouth don’t affect the white fillings material. This allows tooth colored fillings to provide consistent protection with no risk of falling out.

They can also protect your teeth from breaking. Dental inlays and onlays are more reliable and stronger than their metal alternatives. Composite resin fillings preserve more of your natural tooth structure, are much better for the health of your smile. Due to the aesthetic and functional superiority of white fillings, they are the only option our dentists offer. If you have metal fillings you would like to have replaced with this superior option, Dr. Mejia can discuss your options with you during your initial consultation.

Dental Bridges

Missing teeth are unsightly, but they also have a significant impact on the health of your other teeth. When you are missing teeth, the strength of your bite is diminished. In addition, teeth adjacent to those missing will eventually begin to slip into the empty space. This movement can further alter the strength and tension of your bite, and can also result in additional tooth loss.

By placing a dental bridge, Dr. Wanda or Dr. George can restore strength and beauty to your smile. Dental bridges are effective at restoring bite strength, preventing tooth slippage, and helping ensure continued function for a number of years. They’re also a great way to restore adjacent teeth that have been damaged or decayed.

Gum Disease

Gum disease is when bacteria living in your mouth begin to infect your gums. In its earliest form, gingivitis, gum disease may be spotted by gums that bleed easily or become red and swollen. As soon as these symptoms appear, it is important that you contact a dentist to schedule an examination. Left untreated, gingivitis can progress into periodontitis, a much more serious condition.

Periodontitis is the advanced form of gum disease. Symptoms of periodontitis may include:

-Gum recession
-Gums pulling away from teeth
-Pus between teeth
-Loose or shifting teeth
-Chronic bad breath

With periodontitis, infection below the gum line can begin to spread into the bone and connective tissue that hold teeth in place. Not only can this result in tooth loss, the infection can spread throughout the body and increase your risk for heart attack, stroke, and a number of other medical issues. To prevent these issues it is vital that you contact Dr. Wanda or Dr. George for periodontal treatment as soon as possible.

Dental Crowns

Dental crowns are tooth-shaped caps that can be placed over existing teeth or used in conjunction with a dental bridge or implant to replace a missing tooth. In addition, Dr. Wanda Mejia and Dr. George Sepiashvili commonly use dental crowns to:

-Strengthen a tooth weakened by decay
-Protect a tooth with a large dental filling
-Preserve a tooth that has been broken, chipped, or worn down
-Guard against damage following a root canal
-Support the bite as part of TMJ treatment

The role dental crowns play in strengthening and protecting your smile will be dependent on your unique dental issues. Our cosmetic dentists can discuss this with you in more detail during your initial consultation.

Laser Dentistry

Since its recent introduction, laser dentistry has grown dramatically in popularity. That’s because it offers many benefits, including:

-Precise targeting–doesn’t harm surrounding tissue
-Minimally invasive
-Less discomfort–you may not need anesthesia
-Stitches may not be required
-Less risk of infection
-Less bleeding
-Faster healing

A laser allows us to precisely target the area to be treated–and they don’t harm the tissues around the treated area. This allows us to perform minimally invasive procedures that accomplish results with less discomfort. Some people may even find they don’t need anesthesia for their procedure.

  • I would recommend this business

Today was my 3rd visit to Advance Dentistry. The staff is second to none. I’m the biggest baby when it comes to dentist procedures. I’m currently getting fitted for implants. Today I was asked if Dr. George during the surgery wanted to give me a little laughing gas was that okay with me. My honest answer was I put my trust in him and I’m confident in his judgement. Today Dr Wanda and her staff worked on my gum impressions and it couldn’t have been a better experience. Watching Dr Wanda work today showed me that I made the right choice in choosing this office to have my implants done.

Value for money
Service & support
Overall ratingExcellent

Customer Testimonials

Advanced Dentistry has the best, most polite staff I have ever encountered. They really strive to solve whatever dental problems you may have and offer many options. I would recommend them to anyone!

Excellent place, best doctors on dentistry. I highly recommend their work. Very professional and highly qualified!

My experience was virtually pain free. Very professional from the dentist to all their staff. Would recommend highly

The entire staff was polite and welcoming. Sofia was absolutely amazing! I was thoroughly impressed with her comprehensive knowledge and patience. In the end, I understood all the options available and the one best suited for my dental needs.

The best place for me I’m not for dentists but my experience was awesome and the doctor is a gem I’m keeping her for life no doubt

From the very first appointment, all the staff at Advanced Dentistry has been fantastic. 100 % professional and virtually pain free. I want to send a special thank you to Dr. George, Carolin and Sofi. I would highly recommend this dentist if you are looking for a new smile with top of the line service and quality from all parts of the organization. Thank you!

My experience each time I go for the appointment has been great.
From the time you walk in to the time you are completed with your visit, you feel welcomed and comfortable.
Everyone makes you feel you are the priority.

As I near the end of my treatment for tooth replacement ( front tooth ),I know I made the right decision in selecting Advance Dentistry for this procedure. Nine months ago, I entered their office with my hands shaking because I was so scared. I hadn't been to a dentist in eight years because of a bad experience with that dentist. So walking through that door I had only one thought - my daughters November wedding. And wanting to have a great smile for the event. They eliminated my anxiety and have made every visit friendly and comfortable. So if you have questions and concerns , make Advance Dentistry your first stop, chances are it will be your last.

Advanced Dentistry has a powerful almost holistic approach where the patient works with them to improve the state of dental health. This for me has been satisfying. The team is highly experienced and competent employing advanced tools and techniques. Communication is detailed from Day 1. The doctor and support team are fantastic as my comprehensive plan is in progress and exceeding my expectations. This is a unique practice and I recommend them highly!!!

This dentist office is full of extremely friendly and personable staff who explain your different options to you with an emphasis on what YOU want in terms of an end goal. Truly a fantastic and incredibly QUALIFIED team to work with. They also do most things in house, so you'll likely not need a referral to get additional work done.

Very pleased with work, very professional and knowledgeable. I would recommend Advanced Dentistry to anyone I will continue to use them for all my dental needs and work.


Replacing Missing Teeth with Dental Implants with Mohegan Lake Dentist, George Sepiashvili, DDS

Randy Alvarez interviews Mohegan Lake Dentist, George Sepiashvili, DDS about Replacing Missing Teeth with Dental Implants.

Westchester County Cosmetic Dentistry | Advanced Dentistry

Westchester County cosmetic dentistry patients describe the impact of their smile makeovers. They describe improvement in the appearance of their teeth. But they also describe improvements in their facial appearance and in their quality of life.
Dr. George Sepiashvili talks about working hard to find the ideal treatment for each patient, and notes that if a consultation reveals the patient wont benefit from cosmetic dentistry, the consultation is free.

Westchester County TMJ Treatment | Advanced Dentistry

A TMJ patient of Advanced Dentistry in Westchester County describes her experience with TMJ and the benefits of TMJ treatment. The patient did not realize that her teeth clenching was related to TMJ until she broke a healthy tooth in half from clenching. She had suffered jaw pain and headaches in addition to her tooth damage.

Treatment has repaired her damaged smile and balanced the forces in her jaw are evenly distributed. She has no discomfort in the jaw and no headaches. She recommends that patients see Advanced Dentistry for TMJ treatment immediately to reduce pain and to save money. TMJ treatment, she says, has changed [her] life.

Sleep Apnea | Advanced Dentistry

Learn how we can help at https://www.newsmile4u.com/sleep-apnea/!

New Treatment Options for Sleep Apnea with Dr. Wanda Mejia

Watch Dr. Mejia on the Wellness Hour discussing the various options for sleep apnea treatment.

For more information visit our websites listed below.

Treating TMJ with Dr. Wanda Mejia

Watch Dr. Mejia on the Wellness Hour discussing TMJ treatment.

For more information visit our websites listed below.

Photo Book

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