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DENTAL CROWNS

DENTAL CROWNS

What is Dental Crowns?

A dental crown is a type of restoration that caps or encircles the vital tooth that has been destroyed by large cavities, cracks, trauma or even from root canal treatment. Crowns will be advised by dentists when minimal good tooth structure is left and situations where conventional fillings cannot hold up very well. Crowns not only restore teeth back to functions, but they can also protect them from fracturing under loads.

Types of Dental Crown Materials

  1. Full-Metal Crowns: This  type of material have been conventionally used for many decades. They are known for strength, good margin adaptation, conservative tooth preparation and excellent longevity. Nowadays full-metal crowns are restoration of choice for posterior teeth in high load ( but unaesthetic ) areas and short clinical crowns.
  2. Porcelain-Fused-to-metal ( PFM ) crowns: these crowns are more esthetic-pleasing compared with the first type due to proclaim veneering on top of metal substructure in order to mimic tooth color. This makes them equipped with wider indications. As a result, they are routinely placed in most cases as they combine good qualities of good functions and acceptable aesthetics. 
  3. All-Ceramic Crowns: All-ceramic crowns have been developed due to high esthetic demands in the past 30 years. High strength ceramics such as Lithium-disilicate,Alumina or Zirconia, are used as substructure instead of conventional metal alloys. Since the colors of the ceramic are more similar to tooth structure, not only the problem of dark metal showing from conventional porcelain-fused-to-metal prostheses can be minimized, but all-ceramic crowns can also mimic many characteristics of natural tooth structure.As a result all ceramic crowns and prostheses have become more and more popular these days. However with the nature of ceramic that can break under high loads, careful material selection, prosthetic design and case selection by experienced Dentist are keys to success in these cases. Additionally, thorough examination and details consideration are very crucial in order to achieve successful treatments.

Step-by-Step for Crowns

  1. Shade selection
  2. Tooth preparation, impression and temporarization. The temporary crown is placed for 3-7 days during the laboratory fabrication.
  3. Crown delivery and cementation on the second visit.

Cleaning Maintenance

Since crowns are fixed on teeth and cannot  be removed for cleaning, crowns must be taken care just like other normal teeth. Regular tooth brushing, flossing and fluoride use are important to prevent gum problems and decay occurring underneath the crown margins.

Treatment Time

In general, it will take 2 visits(3-7 days up to number of dental crowns)

The Ivory Dental Clinic determines to provide prompt service so every patient gets fast response and efficient treatment.

FAQ

    A:New dentures may feel a little odd or loose for a few weeks until the muscles of the cheeks and tongue learn to keep them in place and you get comfortable inserting and removing them. Also, it is not unusual for minor irritation or soreness to occur and for saliva flow to increase when you first start wearing dentures, but these problems will diminish as the mouth adjusts.
    A:Dentures are made to closely resemble your natural teeth so there should be only a small noticeable change in appearance. In fact, dentures may even improve your smile and fill out your facial appearance.
    A:Eating with new dentures will take a little practice and may be uncomfortable for some wearers for a few weeks. To get used to the new denture, start with soft foods cut into small pieces. Chew slowly using both sides of your mouth. As you get used to new dentures, add other foods until you return to a normal diet. Be cautious with hot or hard foods and sharp-edged bones or shells. And, avoid foods that are extremely sticky or hard. You should also avoid chewing gum while you wear the denture. Also, don’t use toothpicks while wearing dentures.

    A:After getting dentures, you may have difficulty pronouncing certain words. If so, practice by saying the difficult words out loud. With practice and with time you will become accustomed to speaking properly with dentures.

    If dentures “click” while you’re talking, contact your dentist. Dentures may occasionally slip when you laugh, cough, or smile. Reposition the dentures by gently biting down and swallowing. If any speaking problem persists, consult your dentist or prosthodontist.

    A:Your dentist or prosthodontist will instruct you as to how long to wear dentures and when to remove them. During the first several days after receiving your denture, you may be asked to wear it all the time, including while you sleep. Although this may be temporarily uncomfortable, it is the quickest way to identify the areas on the denture that may need adjustment. Once adjustments are made, you should remove dentures before going to bed.

    This allows gum tissues to rest and allows normal stimulation and cleansing by the tongue and saliva. The denture can be put back in the mouth in the morning.

    A:A denture adhesive may be considered under the following circumstances:

    1. To enhance satisfaction with a properly constructed denture. Adhesives enhance retention, stability, bite force, and an individual’s sense of security.

    2. To assist individuals with dry mouth conditions that lessen denture adherence, such as individuals taking cold medications, those with neurologic disabilities including strokes, and the elderly.

    3. To provide added stability and security for those who place unusual demands on facial muscles, such as public speakers or musicians.

    A:There are situations when denture adhesives should not be used. Those cases include:

    1. When it is used as a “fix” for ill-fitting or poorly constructed dentures. If dentures begin to feel loose, cause discomfort or cause sores to develop, contact your dentist as soon as possible.

    2. When a dentist has not evaluated dentures for a long time. Dentures rest on gum tissue and the jawbone, which shrink and deteriorate, respectively, over time. Therefore, the real problem might be a need for a denture adjustment or new dentures.

    3. When oral hygiene practices cannot be sustained.

    4. When adhesives have been used for a long time, especially when visits to the dentist are infrequent, and when the frequency and volume of the adhesive use increases. These developments may indicate the need for a denture adjustment or new dentures.

    5.When any known allergy exists to the adhesive’s ingredients.

    A:Here are some tips to consider when applying denture adhesives:

  • Use the minimum amount necessary to provide the maximum benefit. Apply less than you think you need, and then gradually increase the amount until you feel comfortable.
  • Distribute the adhesive evenly on the tissue bearing surface of the denture.
  • Apply or reapply when necessary to provide the desired effect.
  • Always apply the adhesive to a thoroughly clean denture.
  • Remember adhesives work best with a well-fitting denture.

    A: 1.Paste application. Apply this denture adhesive to a dry or preferably wet denture. Avoid placing adhesive close to the denture borders. If the adhesive oozes, use less of the product. For dentures on the upper jaw, apply three short strips of adhesive — or a series of small dots — along the ridge area and one down the center. For dentures on the lower jaw, apply three short strips of adhesive — or a series of small dots — in the center of the ridge area.

    2.Powder application. Sprinkle a thin, uniform layer throughout the tissue-bearing surface of the denture. Shake off excess powder and press the denture into place. Powders may be preferred over pastes because they are easier to clean off the denture and tissue. In addition, they don’t have the same tendency as pastes do to “shim” (keep the denture away from the tissue).

    A:Dental adhesives are safe as long as they are used as directed. If the denture is well-fitting and the adhesive is only used to give added stability, there should be no ill effects. If adhesives are used excessively to fill voids for an ill-fitting denture, they can be harmful to the underlying soft and hard tissues. Occasionally, in these cases, inflammation of the soft tissues can result. In addition, because of its movement on the soft tissue and underlying bone, an ill-fitting denture can cause bone loss.

    A.For healthy patient without systemic disease and no pathology of the edentulous site,in some case implant could be placed immediately and in some cases,implant could be place after 6-8 weeks of extraction to allow soft tissue healing.For those with pathology in the bone which cause bone defect or in case of infection in the area of future placement,usually the waiting time is longer,around 3-4 months after extraction.

    Please note that the timing and treatment planning will be discussed with patient on a case by case basis.

    A.It is possible to have implant placed but it might need bone graft to reconstruct the bone for implant placement.Also alternative treatments such as bridges or other types of prostheses can be an option.
    A.

    1.Uncontrolled diabetes which affect wound healing.

    2.Uncontrolled high blood pressure.

    3.Ostoporosis patient who receive Biphosphonate intravenous more than 3 years.

    4.Cancer in craniofacial area which currently has radiotherapy.

    5.Heavy smoker especially 20 cigarette/day.Smoking cessation should be done before treatment.

    6.Pregnant patient should delay the treatment.

    7.Patient who take anticoagulant or patient who has a history of stroke within 6 mo’s-1 year should consult physician before treatment.

    8.Patient who takes immune suppresant should consult physician.

    9.Patient with liver disease which lead to unstop bleeding should consult physician.

    A.Any infection in the oral cavity should be removed before implant treatment to avoid the risk of infection at the implant site and to failure of the implant.

    1.Periodontitis – should be treated before placing an implant since patient with history of periodontitis has higher risk of implant failure.

    2.Caries – infected tooth structure should be removed to reduce oral cavity germ

    3.Endodontics – root canal treatment should be done since apical infection especially adjacent to the site in the bone can infect the implant site.

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