Types of Dentures, Advantages and Disadvantages, and Other Related Information

After the loss or extraction of teeth, dentures are placed to restore the functions of chewing, aesthetics, pronunciation, and so on.

Overdenture

Overdenture is a full denture or removable partial denture in which the base of the denture covers and supports the roots and crowns of the teeth that have been treated. The presence of abutment teeth under the denture abutments reduces alveolar bone resorption and enhances retention, stability, and support of the denture.

Indications

1. Patients with oral tissue defects such as straddle fissures, partially missing teeth, microdontia, and enamel hypoplasia.

2. Most of the crowns are missing or shortened due to severe abrasion and caries.

3. Residual report by root canal filling reported periapical light inflammation.

4. A few teeth residual dental defects.

Contraindications

1. The abutment teeth are suffering from dental, endodontic or periodontal diseases that have not been cured.

2. Patients who cannot maintain oral hygiene.

3. The rest of the contraindications of the same teeth defect or missing.

Preparation

1. Abutment teeth suffering from dental, endodontic or periodontal diseases, but clinically expected to be preserved according to the treatment, should be treated in time.

2. Select the number of abutment teeth, generally retained 2-4 in a single jaw. However, if only a single tooth remains, there is also value in retention.

3. Choose the location of the abutment teeth, anterior and posterior teeth can be used, the abutment teeth between the best scattered on both sides of the arch.

4. Determine the long crown abutments or short crown abutments as well as the attachments on the abutments, and the overall design of the denture.

Methods

1. Preparation of abutment teeth

(l) long crown abutment teeth without metal roof preparation, the crown shape to do the appropriate modification, grinding the axial surface of the inverted concave, seeking to get the denture *** with the seating channel; grinding to reduce the pig gap is enough to ensure that the coverage of prosthetic base tray has enough thickness without breaking; grinding the angle of the axial surface and the edge of the Fan edge of the rounding of the smooth.

(2) When preparing a long crown abutment with a metal coping, the single coping is usually shortened to 3-5 mm above the gingival margin; the gingival surface of the abutment axial surface has a slightly greater degree of gingival convergence than that of a full metal crown; and the beginning of the surface is prepared to be obtuse and rounded. Double apex is usually basically the same as the single apex; different at the gingival margin of the tooth preparation is more, equivalent to about the thickness of the inner sand ten apex metal.

(3) Short-crowned abutment teeth with crowns lowered to the gingival line or l-Znun above the gingiva; the root surfaces are prepared in the form of small rounded flat tops.

2. The root surface of the abutment teeth root surface treatment in addition to no metal roof long crown abutment teeth, the rest of the design of the treatment, metal roof abutment teeth need to be metal roof bonding; short crown abutment teeth root canals can be used for silver amalgam filling, can be used for composite resin to cover the root surface, but also in the root surface of the tooth to make a metal roof, but also in the metal roof with a variety of attachments.

3. After taking the impression and filling the model to cover the abutment teeth, take the impression, fill the model and separate the model according to the method of making general denture.

4. Making and completing the overdenture The steps and methods of making and completing the overdenture are the same as those of making the conventional denture.

5. Placement of additional retention devices in the denture base.

(l) Initial wear of denture: the completed denture will be worn for the first time according to the routine.

(2) Preparation of the tissue surface of the denture base: grinding away part of the resin at the tissue surface of the base where the attachments are placed until the attachments can be adequately accommodated.

(3) The negative (or positive) type of the attachment is fitted on the positive (or negative) type of the abutment, the self-coagulating resin is mixed and placed into the prepared abutment socket, and then the denture is immediately put into place in the oral cavity, and when the self-coagulating resin is cured and the denture is removed, then the negative (or positive) type of the attachment is fixed in the denture tissue surface corresponding to the part of the overlying abutment teeth, and then finally the restoration is completed by trimming.

Dentures are replacements for missing teeth that can be removed from and placed back into your mouth. Although it takes longer to get used to a denture and it will never give you the same feeling as real teeth, today's dentures are very natural looking and much more comfortable than before.

There are two main types of dentures: full dentures and partial dentures. Depending on whether your teeth need to be fully or partially replaced and the cost involved, your dentist will help you choose the type of denture that's best for you.

Dentures, or dentures as they are known, come in two varieties: fixed and removable.

Fixed denture: also known as "dead teeth", is the use of missing teeth gap adjacent to the natural teeth as a support, through the denture on the retainer affixed to the natural teeth, the wearer can not take off the wearer.

Active denture: also known as "living teeth", is the use of natural teeth and abutments covered by mucosa, bone tissue for support, by the denture retainer and abutment fixation, the wearer is free to take a restorative body.

Principle of Denture

With a full denture, a flesh-colored acrylic base needs to be fitted to your gums. The base of the upper denture has to cover the palate (top of the mouth), while the base of the lower denture is horseshoe shaped due to the tongue.

Dentures are custom-made in a dental laboratory from impressions of each person's mouth. Your dentist will decide which of the three dentures described below is best for you.

Traditional Full Denture

Traditional full dentures are placed in the mouth after the remaining teeth have been removed and the gum tissue has healed. The gums may take several months to heal, during which time you are toothless.

Ready-to-Use Dentures

Ready-to-Use Dentures are placed in the mouth immediately after the remaining teeth are removed. (Your dentist measures and models your jaw during previous visits.) While the benefit of a ready-to-use full denture is that you don't have to spend time without teeth, they must be realigned months later. The reason: the alveolar bone that supports the teeth changes shape as it heals, which causes the denture to become loose.

Partial Dentures

Partial dentures are placed on a metal framework that is fixed to the real teeth. Sometimes a crown is placed over some of the real teeth to act as a fixture for the denture. A partial denture can be replaced with a removable artificial bridge.

Life expectancy of a denture

Due to normal wear and tear, your denture will need to be relined, refabricated, or relocated over a period of time. Repositioning means replacing a new base while keeping the existing denture. On top of that, as you get older, your mouth changes. These changes make dentures looser, make chewing difficult, and cause irritation to your gums. For this reason, you need to see your dentist at least once a year for an oral exam.

How long does it take to get used to a denture?

For the first few weeks, or even months, your new denture may make your mouth feel awkward or uncomfortable. Eating and articulating with a denture requires training. As your cheek muscles and tongue adjust to the fixed denture, it's not surprising to feel awkward or loose. Excessive salivation, a feeling that your tongue doesn't have enough room, and slight inflammation or pain are also normal. If there is inflammation, see your dentist.

Precautions

1. According to the thickness and density of the mucous membrane in the denture-bearing area, there should be a gap of about lmm between the tissue surface of the abutment and the overlying abutment teeth.

2. If there is obvious bone tissue in the anterior arch area of the abutment teeth, strengthen the denture strength design, the labial side is not placed on the abutment.

3. After the initial wearing of the overdenture, the medical advice to strengthen the oral hygiene mission to prevent periodontal inflammation or caries.

4. Long crown abutment teeth should not have allergic symptoms, including overdenture contact without sensitivity reaction, otherwise desensitization treatment should be given.

5. Caries-sensitive patients, in particular, should take effective anti-caries measures.

6. Short crown abutment teeth with silver amalgam filling the root canal opening or the use of metal capping to cover the root surface of the upper end of the root canal opening preparation should be 3-4mm, to strengthen the fastness.

7. Selection of peg fixation system or rod attachment, the root canal of the abutment tooth preparation with the crown, to strengthen the fastness.

8. Regular review of the patient every 3-6 months review should be routine, check the health of the abutment teeth, to understand the use of denture, and at any time to deal with.