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  • General & Cosmetic Dentistry

General & Cosmetic Dentistry

Dental Crowns (Caps)

A crown is needed if a tooth has been fairly extensively damaged by:

  • Tooth decay
  • Fracture or breakage of a section of a tooth
  • An old large filling that is coming apart or failing

A crown would be the solution to these problems. A crown is a replacement outer covering, not unlike a thimble, that fits over and strengthens a tooth and restores its appearance and function.

Types of crowns

There are different types of crowns for different purposes. The most common type of crown is a porcelain crown with a ceramic or sometimes a metallic core for strength. These crowns are very strong and very closely reproduce the look of a natural tooth. The metal inside the crown is often an alloy of gold. On the back teeth, or molars, especially where it is difficult to see, a gold crown is often the perfect choice because of its strength and durability (average durability is 20-40 year with good hygiene care).

  • Shaping the tooth to remove the decay in or around it
  • Re-sculpturing the tooth to provide an ideal fit for the crown
  • Making a digital image of your teeth in order to create a custom-made crown
  • Making a temporary crown out of tooth colored resin and fitting it onto the tooth during the interim period when the permanent custom-made crown is being created
  • Applying the permanent crown (when received from the lab) by removing the temporary crown and fitting the permanent one onto the tooth
  • After ensuring that the crown has the proper look and fit, the dentist cements it into place.

Expected service of the crown

Crowns can be expected to last for a number of years providing the person performs good oral hygiene and has regular professional care.

Dental Veneers

Porcelain veneers are one of the most beautiful, durable, and smile changing procedures that cosmetic dentistry has to offer.

ommon problems that veneers are used for:

  • Spaces between the teeth
  • Broken or chipped teeth
  • Unsightly, stained or discolored teeth
  • Crooked or misshapen teeth
  • A smile line that is tipped or slanted

Porcelain veneers can be the solution to these problems; they truly create a smile makeover.

What are porcelain veneers?

Porcelain veneers are thin custom made porcelain shells that are permanently bonded to the front and sometimes middle teeth. The veneers are designed to reshape, widen the tooth or alter its color creating the appearance of a nearly perfect tooth.

Porcelain veneer procedure
The tooth is very slightly shaped to allow room for the thin porcelain covering so that the final resulting tooth will not be thickened or bulkier than the natural tooth. An impression is made and from this, our dental technician handcrafts a veneer custom made for your tooth and smile. In some cases, a temporary veneer is placed on the tooth while the dental technician designs the veneer. The veneers are tried in place and once the patient approves of the beautiful result the veneer is bonded into place. The procedure is totally without discomfort and the results are one of the most beautiful and smile changing treatments in the field of dentistry.

Porcelain veneer have turned out to be one of the most dependable and long-lasting treatments available in the dental field. Literally, nothing lasts forever but a person can expect a number of years from a porcelain veneer. The average lifespan, depending on patient care and lifestyle, could be 10 to 20 years.

Dental Bridges

If a person is missing a tooth in the front or back of the mouth a number of changes will occur (all bad) if that tooth is not replaced.

The problems are:

  • The teeth next to the missing tooth tend to tip over (like the Titanic going down)
  • The tooth above or below the missing tooth that used to have a tooth to bite against now begins to move into the missing space.
  • Gaps begin to open between the teeth near the missing tooth
  • Food trapping decay, periodontal disease, bad breath all follow in the wake of this missing tooth

Some of the options available today to replace a missing tooth are:

  • A bridge (a not removable tooth replacement)
  • An implant
  • A partial denture, a removable tooth replacement

What is a bridge?

A replacement for one or more missing teeth that is fixed in place and not removable. The bridge can be made to look and feel like a tooth was never lost, it functions like a tooth and is extremely durable. A bridge is a good word for these dental appliances because not unlike a bridge crossing over a river by resting on 2 banks, the dental bridge is fitted to the tooth on either side of the missing tooth. These anchors teeth are slightly shaped to allow a crown to be placed over them. These two crowns are joined by a middle tooth which will replace the missing tooth. When the bridge is bonded or cemented into place the replacement tooth has the good looks and strength of the original tooth. If you are missing a tooth you should look into having that tooth replaced and perhaps a bridge would be one of the best choices.

Root Canal Therapy

What is a root canal?
A root canal is one of the most common dental procedures performed, well over 14 million every year. This simple treatment can save your natural teeth and prevent the need of dental implants or bridges. At the center of your tooth is pulp. Pulp is a collection of blood vessels that helps to build the surrounding tooth. Infection of the pulp can be caused by trauma to the tooth, deep decay, cracks and chips, or repeated dental procedures. Symptoms of the infection can be identified as visible injury or swelling of the tooth, sensitivity to temperature or pain in the tooth and gums.

How is root canal therapy performed?

If you experience any of these symptoms, your dentist will most likely recommend non-surgical treatment to eliminate the diseased pulp. This injured pulp is removed and the root canal system is thoroughly cleaned and sealed. This therapy usually involves local anesthesia and may be completed in one or more visits depending on the treatment required. Success for this type of treatment occurs in about 90% of cases. If your tooth is not amenable to endodontic treatment or the chance of success is unfavorable, you will be informed at the time of consultation or when a complication becomes evident during or after treatment. We use local anesthesia to eliminate discomfort. You will be able to drive home after your treatment, and you probably will be comfortable returning to your normal routine.

How much will it cost?
The cost associated with this procedure can vary depending on factors such as the severity of damage to the affected tooth and which tooth is affected. In general, endodontic treatment is much less expensive than tooth removal and replacement with an artificial tooth.

Inlays & Onlays

When a middle or back tooth (we call these premolars and molars) is damaged by dental decay or breakage we used to be faced with the decision of placing a filling or if the damage was more extensive, making a crown. But there are many situations where the damage to the tooth is in the medium category. We now have the technology to restore that tooth back to essentially brand new using a dental treatment called an inlay or an onlay.

INLAY: A porcelain replacement for a section of a tooth that is a bit too damaged for just a filling but does not require a full crown (cap).

ONLAY: A porcelain replacement for a section of a tooth that has been damaged to a point where one of the biting or chewing tips (cusp) requires strengthening or replacement.

Inlays and onlays are so lifelike and beautiful that another dentist or hygienist can miss the fact that a tooth has had that treatment. Very similar to a crown, an inlay or onlay is made by a dental technician during which time you will be wearing a temporary while the technician creates the inlay or only.


Invisalign® is a tooth positioning system that’s virtually unseen, extremely predictable in its results, and easily removable for eating, brushing and flossing. Invisalign usually requires less time than conventional braces, and we can even tell you what you’ll look like at given points during treatment.

Straighten misaligned teeth with invisalign
Fortunately, there is now a way to straighten those teeth back to where nature intended them to be comfortably and conveniently.

Nature wants your teeth to chew as efficiently as possible, and so your muscles program themselves to close together where the greatest number of teeth touch at the same time, because this makes your bite most effective for eating.

Problems arise when this is not where your muscles are most relaxed, and so they struggle to grind away the teeth that are blocking them from a more comfortable “rest position.” Over time, this creates not only prematurely worn or broken teeth, but also tired muscles, frequently clicking and popping in the jaw joints, and sometimes extreme limitations on jaw function.

This condition also causes trauma to the supporting bone and gum tissues, because they are called upon to resist forces on the teeth they are not designed to resist. Sometimes large bone growths, called “tori,” occur around these areas of stress. The bone levels between the teeth may be eroded, and the gums become rounded around the necks of the teeth.

The good news is that all this is fixable, in a way that is comfortable, hygienic, simple, and essentially invisible.

There are a great number of variations with Invisalign, and it all relates to what the treating dentist wants as an endpoint. Once all the x-rays and photos are in, they are emailed to Invisalign technicians who work on your individual case.

Teeth Whitening

Everybody loves a bright white smile, and there are a variety of teeth whitening products and procedures available to help you improve the look of yours. Robert G. Marx DDS & Associates can help you with any questions you may have about teeth whitening in Kansas City. Many people are satisfied with the sparkle they get from brushing twice daily with fluoride toothpaste, flossing once a day, and regular cleanings at the dentist’s office. However, if you decide you would like to go beyond regular care to make your smile look brighter, you should investigate all of your options.

Finding the best treatment for you
Schedule a visit with your dentist to learn whether whitening procedures would be effective for you. Whiteners do not correct all types of discoloration. For example, yellowish teeth will probably bleach well, brownish teeth may bleach less well, and grayish teeth may not bleach well at all. Likewise, whitening may not enhance your smile if you have had tooth-colored fillings or crowns. The whitener will not affect the color of these materials and they will stand out in your newly whitened smile. In these cases, you do have other options, such as porcelain veneers.

Tooth whitening treatments

  • Professional teeth whitening with your doctor
  • At-home whitening system
  • Whitening toothpaste

When selecting a whitener or any dental product, be sure to look for the ADA Seal of Acceptance – your assurance that a product has met ADA standards of safety and effectiveness.

Professional teeth whitening
Professional teeth whitening by your doctor is your best choice when you need immediate whitening results. This procedure is called chair-side bleaching and may require more than one office visit. Each visit may take from thirty to ninety minutes.

During chair-side bleaching, the dentist will apply either a protective gel to your gums or a rubber shield to protect the oral soft tissues. A bleaching agent is then applied to the teeth and a special light is used to enhance the action of the agent.


Our Practice Provides Professional Teeth Whitening in Gladstone, MO With Zoom!® Zoom!® is a professional teeth whitening treatment that gets your teeth an average of eight shades whiter — in just one hour. The treatment is safe, simple, and relaxing! Plus, Zoom!® is championed by dentists and patients as a pain-free process.

About the Process:
To prepare for Zoom!® whitening, your dentist will examine your teeth and gums to make sure they are healthy. Your lips and gums will be covered with an isolation material to protect them during the treatment. Then, we apply the Zoom!® whitening gel, which is activated by the Zoom!® light source. The gel and light work together to gently break up the stains on your teeth. After three 15-minute applications within one hour, you rinse and the treatment is complete — leaving you with a brighter, whiter smile. Contact us today to schedule an appointment for Zoom!® whitening!

At-home whitening system
Utilizing a personally fit soft mouth guard you can lighten your teeth between four to six shades in two weeks or less. Application of the bleaching gel for 1 hour daily accomplishes the change. You must have decay free teeth and perfectly healthy gums in order to use the bleaching gel. Check out our special promotions for details on Whitening Rewards Program.


    Very friendly run office. Makes sure work is done right and looks good. My porcelain crowns turned out great with a small adjustment. Whitening looks great. My teeth look a lot bette...
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