Why replace
Missing Teeth?
There are
several reasons that you want to replace a missing tooth
or teeth. A tooth has many functions some being to chew,
to speak, to keep the facial muscles and tissue in a
proper position, to smile, and to keep the other teeth
from shifting. Once a tooth is lost this whole balance
is disrupted and it leads to many various problems.
Once a tooth is lost the teeth start to shift, this
make take some time to notice but it happens fairly
rapidly. After a few years the size of the opening has
closed dramatically. What used to be a fantastic smile
is a gapped hole smirk. Some just prefer not to smile
big anymore because they are self-conscious of their
looks. The cheeks or the lips can appear sunken in. You
may speak differently and sound differently. What once
was a stable bite is now changing. What once was a self
cleansing tooth arrangement is now a plaque trapping
nightmare. Chewing can be more difficult and tooth decay
becomes more prevalent. These are just some of the
effects of losing a tooth. This situation can cause TMJ
problems and can cause headaches and other discomfort.
To minimize the possibility of problems the missing
tooth should be replaced promptly. There are a many ways
to replace that missing tooth or teeth. The most popular
are listed below.
- Conventional Fixed
Bridge
- Implants
- Removable Partial or Full
Denture
Conventional Fixed Bridge
The conventional fixed bridge is a tooth replacement
that is attached with cement to the adjacent natural
teeth. If you have one or two missing teeth on a single
side this can be the best method of replacement. If the
two teeth adjacent to the space are healthy and the
supporting structure (bone and gum tissue) are adequate
a fixed bridge can be placed. The only drawback is that
the teeth have to be prepared for a conventional bridge
to be placed. The preparation requires 1.5 to 2 mm of
tooth structure to be taken off the outside of the
tooth. If the teeth have no restorations in them it is
hard to decide whether to prepare perfectly good teeth.
If this is the case perhaps an implant is better suited
in that area.
The procedure takes usually two to three visits and
is outlined below. The first visit is just like that
of a crown, at the first appointment your dentist will
numb the area and prepare the teeth by removing 1-2
millimeters of the natural crown away until the weakened
portion of the tooth is removed (if any) and solid tooth
structure remains making sure there is sufficient space
for a porcelain or gold bridge to fit over the tooth and
that the two teeth draw together. This procedure
requires a great deal of skill and precision to ensure a
successful result. The bridge must fit perfectly to
prevent further decay and gum disease. This bridge will
also restore the patients bite, prevent shifting of the
teeth and must look good. After the preparation is
completed, an impression of the area is taken to be sent
to the laboratory. At the laboratory the lab technician
will fabricate a bridge to the dentist's specifications.
The dentist will then place a 'temporary bridge' on the
teeth to protect the preparations, allow you to function
on the teeth, keep the adjacent and opposing teeth from
moving and allow you to smile while your bridge is being
fabricated.
At the second appointment, the bridge is bonded or
cemented to your natural tooth. Your new bridge should
look natural and feel comfortable in your mouth. It is
vital that you take care of the bridge and associated
teeth. The margins are areas that are susceptible to
decay and must be kept clean. You must use bridge
threaders and clean under the bridged area. If you take
care of your bridge it can last 5 to 15 years or even
longer.
The cost of a
bridge is usually equivilent to the cost of the number of
teeth being replaced times a cost of a single crown.
This procedure should only be used in replacing one or two
teeth on a single side. If a larger span bridge is desired
the procedure is different and can cost more. Please
contact us to see what would be right for
you.
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Implants
Implants are used to replace a single tooth, many
teeth on one side, or used to support an entire fixed or
removable bridge replacing all the upper or lower teeth.
The most common implant used today is the
osseointegrated implant. This implant is placed in a
hole which is drilled into the patient's lower or upper
jaw. Depending on the number of teeth being replaced,
one or more implants are placed in the bone. If
neccessary a substrucure is fabricated and then a crown,
bridge or denture is securely fastened to the
substructure or implant.
Implants are useful for patients that have tried but
can't wear conventional dentures. Patients that lost a
tooth, have two teeth with no or small fillings adjacent
to the hole and don't want to cut the teeth down to make
a bridge, would also make good candidates. In either
case the patient has to commit to good oral hygiene.
Implants are usually placed in outpatient settings and
have a healing phase of 3 to 9 months.
There is
a significant investment involved to place the
implants as well as restore them. They can be placed
by periodontists, oral surgeons, or trained general dentists. So make sure
to keep the implanted areas healthy, by brushing and
flossing daily.
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Removable Partial or Full Denture
A partial or full removable denture is a set of
artificial teeth that are not fixed permanently to one
own natural teeth. This set consitsts of usually plastic
teeth set in an artifical plastic or plasic and metal
framework that rests on the gum tissue. A partial
denture is used for people who have multiple spaces on
one or both sides or whose teeth are not strong enough
to support a fixed bridge. If the back tooth is lost on
a fixed bridge the only way to replace that tooth would
be to place a partial denture or an implant supported
denture or bridge. A partial denture usually has clasps
or arms that fit around the existing natural teeth and
use them for retention. The plastic base just sits on
top of the gum tissue.
A complete denture is just that, it replaces all the
teeth on either the top or bottom jaw. The full denture
can be the most difficult restoration to get accustomed
to. The lower jaw offers little resistence to
displacement. Therefore the lower denture tends to move
around quite a bit. This movement only causes further
atrophy of the jawbone itself, making the denture less
and less retentive.
The upper denture can create a seal using the soft
palate (roof) of your mouth. This seal can be adequate
to keep this denture in place. You can and do get
resorption of the bone but it is significantly less that
the lower.
To fabricate a denture it usually takes approximate
5-7 visits over a period of at least a month.
Preliminary and final impressions are taken, teeth are
selected, the denture is tried in, and then after proper
teeth placement is established the denture is processed.
After the denture is delivered there probably will be a
few, to many, adjustments needed to make minor
adjustments.
Partial and full dentures can last many
years. They periodically need to be relined to compensate for lost
bone.
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