Invisalign Vs. Braces

invisalign vs braces cortlandt manor ny

At Glaser Orthodontics, our goal is to provide the best orthodontic care options to all of our patients. As a result, we offer braces, clear braces, Invisalign, and Invisalign Teen in Cortlandt Manor NY, Croton-On-Hudson NY, Yorktown Heights NY, and surrounding areas of Westchester County NY.

How Do They Compare?

invisalign vs braces cortlandt manor nyInvisalign and braces are both used to attain the same results of straighter teeth. However, each option has different features that may be a better fit for certain patients and lifestyles. Our team at Glaser Orthodontics will be there every step of the way to make sure we provide the right choice for you.

Invisalign

The Invisalign system uses sets of clear aligner trays to gently and gradually move teeth into their proper alignment. Clear aligner sets are usually worn for about 2 weeks until they are substituted for the next set in the series. During an initial free consultation with a Cortlandt Manor orthodontist, Dr. Glaser will digitally capture your dental impressions in order to create a treatment plan with your specific needs in mind.

Braces

Metal braces work by bonding brackets to the front of teeth that are designed to apply continuous and gradual pressure to gently align teeth over time. Braces are made of stainless steel brackets and archwires that are tightened periodically throughout treatment to maintain constant pressure and achieve desired results.

What Are The Benefits?

Invisalign has become the clear alternative to braces. They work the same way braces do to straighten teeth without any restrictions or limitations.

Traditional metal braces are typically what comes to mind when people think of orthodontic treatment. Many patients often ask why metal braces are still so relevant when there are clear options available. This is because traditional braces hold their own set of benefits.

The Benefits Of Invisalign

Invisible Clear and undetectable so no one has to know about your orthodontic treatment.
Removable Clear aligners can be removed whenever necessary to eat or clean.
No diet restrictions Enjoy all of your favorite foods and snacks during treatment.
No discomfort from wires or brackets Composed of smooth, lightweight plastic for maximum comfort.

The Benefits Of Braces

More effective for complex issues Capable of fixing more serious orthodontic issues that may not be attainable with Invisalign.
Less discipline necessary for success Keep treatment going at all times! The freedom of clear aligners requires more obedience and discipline for the same results.
No additional cleaning needed Aside from routine brushing and flossing.

Choosing Between Invisalign Vs. Braces In Cortlandt Manor NY

Dr. Glaser and our team at Glaser Orthodontics are experts in orthodontic care. We are happy to answer any questions or concerns you may have regarding braces, clear braces, Invisalign, and Invisalign Teen in Cortlandt Manor NY, Yorktown Heights NY, Jefferson Valley NY, Buchanan NY, Montrose NY, and surrounding areas of Westchester County NY. Contact Glaser Orthodontics to schedule a complimentary consultation today. Call now (914) 739-6400.

Braces Near Me In Cortlandt Manor NY

At Glaser Orthodontics, our goal is to offer affordable orthodontic care such as braces and clear braces to all of our patients in Westchester County.

Where Can I Find Affordable Braces Near Me?

braces near me cortlandt manor nyEvery beautiful new smile begins with a complimentary consultation with a leading orthodontist in Cortlandt Manor such as Dr. Glaser. At Glaser Orthodontics, we understand that the cost of braces can vary based on your individual needs and we don’t want any unplanned expenses to affect your budget. As a result, we always work with our patients to make sure treatment costs remain affordable.

How Do Braces Work?

Braces work by applying constant pressure to gradually shift teeth in the desired direction. Traditional braces are composed of stainless steel brackets, archwires, and elastics, which are periodically tightened throughout treatment. If you suffer from common issues such as overbite, crooked teeth, crowding, or spacing, a visit to Glaser Orthodontics can make the smile you desire one step closer. In addition to providing straight teeth, braces can also offer significant benefits such as reducing tooth damage, preventing jaw problems, and improving overall health.

How Much Do Braces Cost?

The cost of braces can vary for each patient and is dependent on specific factors such as the severity of duration of treatment, the severity of issues, and your location. Being that no two patients have the same needs, no two treatment plans are ever identical. In order to find out custom details for your own treatment, you will need to meet with a Cortlandt Manor orthodontist at Glaser Orthodontics.

How Long Will I Have To Wear Braces?

The answer to this question can be different for each patient. At Glaser Orthodontics, we understand that each patient has their own personal needs and goals. Dr. Glaser will be there every step of the way during treatment until you achieve the desired results.

Choosing Braces Near Me In Cortlandt Manor NY

Dr. Glaser and our team of professionals at Glaser Orthodontics are experts in orthodontic treatment. We are happy to answer all of your questions or concerns regarding braces, clear braces, Invisalign, or Invisalign Teen in Cortlandt Manor NY, Croton-On-Hudson NY, Briarcliff Manor NY, Buchanan NY, Montrose NY, Yorktown Heights NY, and surrounding areas of Westchester County NY. Contact Glaser Orthodontics today to schedule a complimentary consultation. Call now (914) 739-6400.

Do Braces Hurt?

braces in montrose ny

Orthodontic treatment with braces can hurt occasionally, but most often, the “hurt” reported by a patient is more of a “discomfort.” The best way to avoid and reduce any possible pain or discomfort is to keep a conscientious care schedule. Dr. Barry Glaser of Glaser Orthodontics knows that a patient who is consistently experiencing pain or discomfort associated with their braces near Montrose, NY should be examined for any problems with their orthodontic appliances.

Why do braces hurt?

The mouth is a very sensitive part of the body. Adding new brackets, wires, and other appliances to the teeth may cause an orthodontic patient some occasional pain or discomfort. But most people don’t understand or even care why they are in pain. Pain from orthodontic treatments with braces may be cause by a variety of factors:

  1. Irritation inside the mouth: Your mouth will need a few days to adjust once they have been fitted and your teeth and gums are interacting with your appliances for the first time. These new additions to your teeth require your mouth to get comfortable with their presence. However, once the two are comfortable, the irritation will ease over time.

  2. Broken bracket: Your braces are constantly working. Because of this, there is always a possibility that something can break. Broken brackets should be expected, and they happen to almost everyone at least once during treatment. This can cause some pain and irritation because the broken bracket may poke at or tear the delicate surfaces in the mouth (especially if you have traditional metal braces). If this occurs, make an appointment with Dr. Barry Glaser and Glaser Orthodontics near Montrose NY, as soon as possible to fix the problem and make sure no further problems or pain occurs.

  3. Shifting of teeth: Braces shift your teeth to give you the healthy, picture-perfect smile you’ve always dreamed of. It’s important to know that the shifting of the teeth is what causes the most pain when it comes to braces. When your braces are tightened, they are working harder to align your teeth and essentially changing your teeth’s position in your mouth.

How do I keep my braces from hurting me?

To help you avoid minor pain or discomfort during your course of treatment:

  • Avoid hard foods. Dr. Barry Glaser says that hard foods should be avoided, especially after an adjustment appointment. The extra effort to chew these foods may cause or exacerbate any discomfort the patient may already feel. When your braces hurt, stick to soft foods such as pasta, mashed potatoes, yogurt, bananas, etc.

  • Take over-the-counter or doctor-prescribed medication. When your teeth are hurting,  Dr. Barry Glaser recommends taking an over-the-counter medicine that to lessen any pain. Medicines such as Tylenol, Advil, or Aleve can help ease the pain until your teeth and gums get used to their new positioning.

Braces may hurt, at least initially, because of how they work inside the mouth. The result with this orthodontic treatment, however, is a mouth of straight, functional, and healthy teeth and gums.


Dr. Barry Glaser and the team at Glaser Orthodontics are the experts in braces. If you have any questions pertaining to braces, clear braces, Invisalign, or Invisalign Teen near Montrose, NY, Peekskill NY, Cortlandt Manor, NY, Cold Spring, NY, Croton-on-Hudson, NY, Westchester, NY, or surrounding areas, or would like to schedule a complimentary consultation with Dr. Barry Glaser, contact Glaser Orthodontics at: 914-739-6400.

Braces and Invisalign with Mouthguards

Braces Montrose, NY

Dr. Glaser and the team at Glaser Orthodontics recommends to their patients who play sports in the Montrose, NY area that they wear a mouthguard so that their teeth and braces stay protected while undergoing orthodontic treatment.

What do mouthguards do?

Mouthguards help prevent injuries to the teeth and jaws when patients get active in sports or physical activities. They are mandatory in collision sports such as football, hockey, and boxing where the risk of injury is likely. Children and adults involved in incidental contact sports like basketball, baseball, wrestling, soccer, and volleyball are now wearing mouthguards to prevent injuries to the mouth.

While undergoing treatment with braces, it becomes even more important to wear a mouthguard. Anything that can result in broken brackets or wires needs to be prevented for the sake of your teeth, mouth, and treatment.

Orthodontic mouthguards

Orthodontic mouthguards are available only by orthodontists like Dr. Glaser in the Montrose, NY area. These mouthguards may be more expensive than the others, but they are customized to fit and protect the teeth and braces. Orthodontic mouthguards offer the most comfort and protection of any other type of mouth guard available.

Playing sports with Invisalign

Dr. Glaser and the professionals at Glaser Orthodontics know that playing sports during orthodontic treatment in the Montrose, NY area is easier and safer with Invisalign clear aligners. Invisalign is made of a clear thermoplastic material, meaning that they are not very susceptible to damage during sports activities.

Invisalign clear aligners make playing a sport during orthodontic treatment easy and comfortable for the wearer because:

  • They can be worn during physical activity without anything causing irritation to the soft tissues of the mouth.
  • Invisalign is less likely to be damaged by strenuous activity or impact.
  • Invisalign is removable so that sports-specific equipment like mouthguards can be worn.

Dr. Glaser and the pros at Glaser Orthodontics in the Montrose, NY area care about your well-being and smile with orthodontic treatment. They want to make sure both have the best protection during any kind of physical activity. For more information on orthodontic mouthguards and/or orthodontic treatments like braces or Invisalign with Dr. Glaser, don’t hesitate to schedule a consultation with Glaser Orthodontics today!


Dr. Barry Glaser and the team at Glaser Orthodontics are the experts in braces and Invisalign. If you have any questions pertaining to braces, clear braces, Invisalign, or Invisalign Teen in Montrose, NY, Cortlandt Manor, NY, Cold Spring, NY, Croton-on-Hudson, NY, Westchester County, NY or the 10548 zip code area, or would like to schedule a complimentary consultation with Dr. Barry Glaser contact Glaser Orthodontics at: 914-739-6400

How Do I Floss With Braces?

Braces Jefferson Valley, NY

Dr. Barry Glaser and the Glaser Orthodontics staff take the time to instruct each of their orthodontics patients in the Jefferson Valley, NY area how to floss while they are being treated with braces. Wearing braces on the teeth can make good oral hygiene habits difficult to perform, can create spaces where food debris can collect, and they provide an environment for bacteria to thrive. Good brushing and flossing techniques and habits while undergoing orthodontic treatment with braces is often a challenge, but flossing with braces can be accomplished effectively once equipped with a little advice.

Why floss with braces?

The Academy of General Dentistry (AGD) advises that flossing is just as important as brushing in a conscientiously applied regimen of good oral hygiene. Toothbrushes are great for cleaning plaque from the fronts and back surfaces of the teeth, but they simply cannot reach the sides, in between the teeth, and along the gumline. Food debris in the mouth feeds bacteria. The bacteria in the mouth creates acid that causes bad breath and breaks down tooth enamel. Flossing removes most of this acid-causing food debris to keep teeth healthier and breath fresher. All of this becomes even more prevalent while undergoing treatment with braces because of the brackets and wires that often become a catch-all for food and bacteria.

Get in the game.

A floss pick is an instrument that is effective at keeping braces clean and clear of food debris. A piece of dental floss spans a space at one end, kind of like a harp. The other end is a tapered point that can be used to force food debris from behind the wires, around the brackets, and in between the teeth. Floss picks are available for both children and adults and may be either reusable or single use. A floss threader is a thin piece of plastic with a loop at the end to hold the floss. The plastic piece is threaded above or below the wires to access the spaces between teeth. You can learn more about the different kinds of orthodontic floss and find out which is the best for you here.

Up your game.

There is actually a technique for flossing that is proven to help effectively remove plaque from teeth. Carefully manipulating the dental floss between the teeth and into a “C” shape is a good method to clean the back surfaces of the teeth, including down by the gumline. Make an up-and-down motion against the tooth, keeping the floss tight against the surface. Floss each tooth individually and move in sequence. Keep going until each tooth has been flossed. A Waterpik water flosser is an oft recommended method of flossing. It may be more effective than dental floss and works with a pulsating stream of water to flush out food or particles stuck between teeth and gums and to remove the plaque that can build up on braces.

Stay on the scoreboard.

A conscientious oral hygiene regimen including a fluoride toothpaste, anti-plaque mouthwash, and thorough flossing is the program patients near Jefferson Valley, NY can rely on to keep their mouth after braces clean, healthy, and in the best condition possible. Dr. Barry Glaser and the team at Glaser Orthodontics coach their patients to a winning treatment outcome every time. They are important teammates in their patients oral health care. For more information about how to floss with braces, or to schedule an appointment, contact Glaser Orthodontics today at:  914.739.6400

Do Braces Hurt?

Braces Yorktown Heights, NY

 Orthodontic treatment with braces can be uncomfortable occasionally, but most often, the “hurt” reported by a patient is more of a feeling of pressure and can be more accurately described as “discomfort.” The best way to avoid or reduce any discomfort that may be associated with braces is to keep a conscientious care schedule. Dr. Barry Glaser of Glaser Orthodontics knows that a patient who is consistently experiencing pain or discomfort associated with their braces near Yorktown Heights, NY should be examined for any problems with their orthodontic appliances.

What is this feeling?

The mouth is a very sensitive part of the body. For any type of braces, adding new brackets, wires, and other appliances to the teeth may cause an orthodontic patient some occasional discomfort. But most people don’t understand or even care why they are feeling this way. Discomfort associated with this orthodontic treatment may be caused by a variety of factors:

  • Irritation inside the mouth: Your mouth will need a few days to adjust once your new braces have been fitted and your teeth and gums are interacting with your appliances for the first time. These new additions to your teeth require your mouth to get comfortable with their presence. However, once the two are comfortable, the irritation will ease over time.
  • Broken bracket: Your braces are constantly working. Because of this, there is always a possibility that something can break. Broken brackets should be expected, and they happen to almost everyone at least once during treatment. This can cause some pain and irritation because the broken bracket may poke at or tear the delicate surfaces in the mouth (especially if you have traditional metal ones). If this occurs, make an appointment with Dr. Barry Glaser and Glaser Orthodontics as soon as possible to fix the problem and make sure no further problems or pain occurs.
  • Shifting of teeth: Braces shift your teeth to give you the healthy, picture-perfect smile you’ve always dreamed of. It’s important to know that the shifting of the teeth is what causes the most pain. When the brackets are tightened, they are working harder to align your teeth and essentially changing your teeth’s position in your mouth.

How do I keep my braces comfortable?

To help you avoid any discomfort you may experience during your course of treatment:

  • Avoid hard foods. Dr. Barry Glaser says that hard foods should be avoided, especially after an adjustment appointment. The extra effort to chew these foods may cause or exacerbate any discomfort the patient may already feel. When your braces hurt, stick to soft foods such as pasta, mashed potatoes, yogurt, bananas, etc.
  • Take over-the-counter or doctor-prescribed medication. When your teeth are hurting because of braces, Dr. Barry Glaser recommends taking an over-the-counter medicine that to lessen any pain. Medicines such as Tylenol, Advil, or Aleve can help ease the pain until your teeth and gums get used to their new positioning.

Braces may hurt, at least initially, because of how they work inside the mouth. The result of orthodontic treatment with braces, however, is a mouth of straight, functional, and healthy teeth and gums.

For more information about why braces may hurt during treatment or to make an appointment with Dr. Barry Glaser and Glaser Orthodontics near Yorktown Heights, NY, call: 914.739.6400

No Age Limit When it Comes to Braces

Braces Putnam County, NY

Adults who are considering orthodontic treatment with braces near Putnam County, NY are finding that the patients of Dr. Barry Glaser and the team at Glaser Orthodontics have more positive treatment experiences and more successful outcomes. 

A concern for adults considering adult orthodontic treatment with braces is that their treatment will not fit into their otherwise busy schedules, and that orthodontic care will become a burden. Adult patients of Dr. Barry Glaser and the team at Glaser Orthodontics are advised to follow these simple steps to minimize their efforts and to maximize the successful outcome of their treatment with braces. 

Pick a treatment plan that works for your lifestyle. The first step in ensuring that your orthodontic treatment goes well is selecting a treatment plan that fits seamlessly into your lifestyle. Adult patients of Dr. Barry Glaser and the team at Name Orthodontics are able to explore the many treatment options available to them including traditional metal braces, clear braces, or Invisalign clear aligners.

Know the care requirements of each treatment option. Dr. Barry Glaser will meet with you and discuss in more detail the benefits and drawbacks of each system to help you determine what option is right for you. Clear braces sometimes require more careful care, as they are easier to stain and break. Invisalign is removable and easy to clean. But, if you are extremely busy and tend to lose things, the removable nature of Invisalign makes it easy to misplace or forget. 

Keep your adjustment appointments. Any setback or delay in treatment, even if it is a small one, may compromise the timing of your treatment. During these appointments, Dr. Barry Glaser will check on your progress and make any adjustments to your appliance that are needed to keep your teeth moving correctly. Conscientious adherence to adjustment schedules will ensure that your treatment will always be progressing on schedule, and you may even finish your orthodontic treatments earlier. 

Use appliances as directed. Sometimes appliances like rubber bands or retainers will need to be employed during your treatment. Dr. Barry Glaser recommends to his patients to always wear these appliances exactly as directed and to make wearing them part of their daily routine. Reserve some time daily (at the same time, perhaps after lunch or right when you wake up) to care for your braces and appliances properly, so that eventually it feels second nature. A consistent daily regimen of care, following the directions appropriate for your treatment, will help relieve the stress of worrying about tending to your orthodontics. 

Dr. Barry Glaser and the team at Glaser Orthodontics are the experts in adult orthodontics near Putnam County, NY. If you have any questions about traditional braces, clear braces, or Invisalign clear aligners, or if would like to schedule an appointment with Dr. Barry Glaser contact Glaser Orthodontics at: 914.739.6400

Six Of The Best Foods to Eat During Your Treatment with Braces

Braces Yorktown, NY

Many orthodontics patients with braces are unsure of what foods are restricted in their diets. Many also believe the list of foods to avoid is longer than it actually is. Dr. Barry Glaser of Glaser Orthodontics shares some ideas about what foods are safely enjoyed and which foods are best to avoid eating while wearing braces near Yorktown, NY.

It is true that during your treatment with braces there are limitations on what you can eat. But the time (and money) invested in them is well worth coping with these limitations. The payoff is a perfectly straight, healthy, and attractive smile.

What foods can be enjoyed during your treatment?

There are many delicious food options that can be eaten while wearing braces including:

  • Bananas
  • Yogurt
  • Soup
  • Cheese
  • Pasta
  • Mashed Potatoes

Dr. Barry Glaser wants to make sure that every patient with braces eats healthy food and gets enough daily nutrients. Here are some meal ideas that are safe for patients with this orthodontic treatment. Perhaps there is a family favorite among some of these delicious meal options:

  • Lasagna. Lasagna is a great dinner because it provides many food groups in one dish, is tasty, and is soft.
  • Grilled Chicken and Vegetables. While meat from a bone can cause damage to your braces, deboned meats like chicken breast can be eaten. Chicken pairs nicely with vegetables like broccoli.
  • Chicken Noodle Soup. Chicken noodle soup gives you many necessary nutrients because of the variety of ingredients that can be added. Soup is also a filling and tasty meal and will not damage your braces.

What foods should be avoided?

While wearing braces, the three types of food that should be avoided are hard, sticky, and chewy foods. These types of food should be avoided because they can get stuck in your braces easily and be difficult and sometimes painful to get out. Some food categories that should be avoided are:

  • Gum
  • Popcorn
  • Ice
  • Caramel
  • Pretzels
  • Raw vegetables
  • Steak
  • Hard candies

Some of these foods do not have to be completely avoided, however. Foods like vegetables, steak, and pretzels can be broken or cut up into smaller pieces and then eaten safely.

There are many foods which are nutritious, delicious, and are friendly to your braces. To schedule an appointment with Dr. Barry Glaser and Glaser Orthodontics near Yorktown, NY, or for more information, please call: 914.739.6400

What You Need to Know Before Choosing Braces

Braces Somers, NY

Dr. Barry J. Glaser and the team at Glaser Orthodontics develop orthodontic treatment plans that are personalized for each patient’s needs. These plans may include treatment methods and approaches that are best suited to the patient’s needs and treatment goals near Somers, NYTraditional braces, ceramic or lingual, and Invisalign clear aligners are options Glaser Orthodontics offers their patients. 

If you have chosen orthodontic treatment with braces, you should know:

  • Braces Can Be Uncomfortable. Traditional braces are made of metal that are comprised of many small parts such as wires and brackets. Because of this, you may experience trouble with a loose bracket or wire. If your system seems to cause you pain apart from the normal discomfort of jaw or misalignment movement, you need not worry. The solution is simple – apply soft wax to the area that is bothering you, and come into Glaser Orthodontics as soon as possible. Dr. Barry J. Glaser will be able to fix the broken part so that they will work properly for you to continue a comfortable day-to-day routine with braces near Somers, NY.
  • Braces Can Trap Food. Braces can trap food in and around the teeth. Regardless of what you’re eating, the location of them will cause some food debris to get stuck. It is important to brush thoroughly and completely while being treated. Dr. Barry J. Glaser suggests brushing after every meal, before bed, and upon waking. It is important also to floss well during treatment. You may want to purchase a braces-friendly flosser, like a Waterpik, to eliminate food debris between your brackets and wire.
  • Some Foods Should Be Avoided. Dr. Barry J. Glaser also suggests that you avoid some foods during this orthodontic treatment near Somers, NY. Some commonly known foods to avoid include gum, popcorn, and bagels. Glaser Orthodontics can provide you with a detailed list of foods to avoid that could damage your brackets.

Eventually, caring for your braces will become second nature and adjusting to your new lifestyle will be easy. You may find that your new oral health care habits stick around after your braces are removed. 

Glaser Orthodontics and Dr. Barry J. Glaser help their patients decide which orthodontic treatment options fit best with their budgets, schedules, and treatment goals. If you have more questions, need further information, or to schedule an appointment, call Glaser Orthodontics at: 914.739.6400

Which is better for Adults, Invisalign or Braces?

Invisalign or Braces Yorktown Heights, NY

 Are you an adult considering orthodontia to straighten your teeth but are concerned about your appearance while undergoing treatment? At Glaser Orthodontics, we customize a personal plan of teeth-straightening care that best fits your orthodontic treatment goals and your cosmetic concerns for patients living in Yorktown Heights, NY.  Advancements in orthodontic care technology such as Invisalign or braces may be the right course of treatment for you.

But, which form of treatment is more effective? The answer is subjective, as is the needs and tastes of every patient at Glaser Orthodontics.

Differences between Invisalign or braces

  • Traditional braces are not removable by the patient. These types of teeth-straightening braces consist of brackets and wires that are fixed onto your teeth and worn 24 hours a day, 7 days a week.  Because they are not removable, patients using this treatment plan must take the proper precautions, such as avoiding certain foods or playing rough in contact sports).
  • Invisalign is removable and essentially invisible to the human eye. Invisalign is a clear plastic tray that fits over your teeth. They may be taken out during the day for eating, brushing your teeth, and flossing. A removable appliance, however, requires extra care to ensure that they stay clean and hygienic. Invisalign is easy to remove and to keep clean.
  • Traditional braces are made of metal brackets and wires. They provide stability and are effective at straightening teeth. However, the sides or “wings” of the brackets might cause sores and pain during mouth movements.
  • Invisalign is made of a strong, medical-grade, thermoplastic material. The Invisalign trays are fitted snugly around your teeth. They are clear and removable, so they are not very noticeable. They cause less discomfort than metal braces but might not be as effective as traditional braces in treating vertical adjustments.
  • Traditional braces can sometimes be less costly than Invisalign. It is difficult to state definitively whether traditional braces or Invisalign costs more than the other. The price of both treatments depends on the individual patient’s needs. The amount of work needed, the length of the treatment, your insurance coverage, and the course of treatment worked out with Glaser Orthodontics all factor into the price of your treatment.
  • Traditional braces are cheaper, easy to clean, and more effective in raising or lowering misaligned teeth.
  • Invisalign clear aligners are removable, lighter, and more convenient to wear during day-to-day activities.

Trust Glaser Orthodontics to help you choose the right course of treatment for your individual needs and lifestyle, whether that is Invisalign or braces near Yorktown Heights, NY. They can help you make the best decisions for you and your smile and will help you in choosing the right orthodontic treatment for you. Contact us at: 914.739.6400