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Learn About Conventional Over-Denture

A conventional over-denture rests over some healthy natural tooth roots. This approach was first reported in 1861. To understand this method, it is necessary to review some facts.

An Overview of Alveolar Ridge Dynamics

• Maintaining a denture on the jawbone ridge (called alveolar ridge) is essential to prevent it from becoming loose during eating, speaking, and other activities.
• Preserving the alveolar ridge facilitates denture stability.
• The body tends to conserve energy and nutrients by maintaining only structures with apparent immediate value. A typical example is the bulk reduction of a broken leg held immobile by a full-leg cast for a month or more.
• The body recognizes that the only one purpose for alveolar bone is to hold tooth roots.
• Alveolar bone no longer supporting a tooth root is removed, or literally dissolved away, by the body. This is called resorption, or simply shrinkage.
• Resorption progresses at varying rates in the same person at different times, and at different rates between different people. Resorption progresses rapidly within the first year of losing a tooth, after which time, the rate progresses at a slower pace.

From this overview, if the maximum amount of alveolar ridge is to be maintained, then preserving the maximum number of periodontally healthy tooth roots should achieve that end.

Preserving the Sensation of Having Teeth

Studies demonstrate that even though only roots are preserved, and a denture covers them, a patient still has sensory input sensations similar to that experienced with teeth, as opposed to individuals with conventional dentures and no preserved roots. Over-denture patients also appear to have a more natural perceived directional sense in their chewing activities. In other words, many patients relate that they still feel like they have teeth -- a positive comment.

Underlying Philosophy of the Conventional Over-Denture

If a patient's treatment plan to have a denture, and the roots of some remaining teeth are supported in healthy alveolar bone, then a conventional over-denture is a viable consideration.

However, only a licensed dentist can determine if a conventional over-denture is a suitable consideration for a certain person, after a comprehensive examination.

Some Characteristics of a Conventional Over-Denture

• Most of a tooth crown (that part of the tooth above the gums) is removed. This often necessitates root canal therapy if not already done.
• The remaining tooth, projecting above the gum, is rounded and usually covered with a similarly shaped artificial crown-like covering.
• Various configurations and extensions may be built onto some retained roots. In those cases, that portion of the denture overlying these configurations is modified to contain attachments that clip onto a framework or receive the individual extensions. In addition to preserving alveolar bone and sensory input, the denture is held securely in place, but may be comfortably and easily removed for cleaning.

Advantages of a Conventional Over-Denture

• Feels more like having teeth
• More retentive in many cases
• Helps reduce shrinkage of surrounding bone
• Reduces pressure to portions of the alveolar ridge
• Positive psychological advantage of still having teeth

Disadvantages of a Conventional Over-Denture

• Scrupulous oral hygiene is essential in order to prevent decay and gum disease
• The over-denture may feel bulkier than a conventional denture
• Frequent maintenance examinations are necessary
• Generally, this is a more expensive approach than a conventional denture

by Joseph J. Massad, D.D.S.

+Jim Du Molin is a leading Internet search expert helping individuals and families connect with the right dentist in their area. Visit his author page.

Prosthodontist - Denture and Prosthodontic Questions

Q. What is a prosthodontist?

A. A prosthodontist is a specialist in the restoration and replacement of broken and missing teeth. Their training lasts an additional three years after four years of dental school. During that time, a prosthodontist is taught in greater detail about both removable and fixed prosthodontics.

Removable prosthodontics includes replacing missing teeth with appliances that the patients themselves can take in and out of their mouth, such as dentures and partial dentures.

Fixed prosthodontics includes replacing missing and/or broken teeth with restorations that the patient cannot take in and out, such as veneers, crowns, bridges, and implants.

Q. What are dentures?

A. Dentures are removable prosthetic devices designed to replace missing teeth.

Q. What are complete dentures?

A. Complete dentures are dentures that replace a complete set of missing teeth.

Q. What is the difference between conventional dentures and immediate dentures?

A. Conventional dentures are dentures that are made and placed after the remaining teeth are removed and the tissues have healed. Immediate dentures are dentures that are placed immediately after the removal of the remaining teeth.

Q. What is an over-denture?

A. An over-denture is a denture that fits over a small number of remaining natural teeth or implants.

Q. What do dentures feel like?

A. For a few weeks, new dentures will feel awkward until you become accustomed to them. They might feel loose until the cheek and tongue muscles learn to hold them in position. It is not unusual to feel minor irritation or soreness. The patient needs to see his or her dentist or prosthodontist for regular fit adjustments to relieve any sore areas.

Q. Are you able to eat with dentures?

A. Eating with dentures will take a little practice. You should start with soft foods that are cut into small pieces. As you become used to chewing, you can return to your normal diet.

Q. Are there foods you should avoid if you wear dentures?

A. There are only a few eating restrictions for denture wearers. Avoid biting down directly on crunchy or hard foods, like whole apples, hard pretzels, crusty bread, or large sandwiches. They can break because of the angle where the denture comes into contact with the hard surface.

Biting is limited only by the stability of the dentures themselves. Insufficient bone structure (shrunken bone ridges covered by gum tissue), old or worn dentures, and a dry mouth decrease stability.

Q. If you wear dentures, are dental adhesives necessary?

A. Today's dentures have been significantly improved through advances in both dental and materials technologies. As a result, dentures that fit properly usually do not require adhesives to secure the dentures. When you are just getting used to dentures, adhesives may be advised, but otherwise should not be necessary.

A loose denture is a sign that it doesn't fit your mouth correctly. When first getting used to dentures, you may notice them slipping when you laugh, smile, or cough, which is caused by air getting under the base and moving it. The more you wear dentures, the better you will be able to control their movements in these situations.

If your mouth has insufficient bone structure, dentures will be more difficult to retain. Your dentist or prosthodontist may advise the placement of implants. These are placed in the bone and retain the denture with small, precision attachments.

+Jim Du Molin is a leading Internet search expert helping individuals and families connect with the right dentist in their area. Visit his author page.