
In
multiple cases the extraction of teeth must or of radicular remains must
be done in an unconventional manner, due to the fact that they are unreachable
through other systems or methods applied in simple extractions. Any simple
extraction can get complicated and lead to a surgical extraction, but
this chapter will refer to diagnosed surgical extraction planned beforehand. |
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A surgical extraction, like all other oral surgery,
follow the guidelines of general surgery, according to the case it could
be done using local or general anesthesia.
In almost all cases a deliberate elimination of the external cortical bone of the alveoli and sometimes also the internal one. The
following steps must be followed: |
The
processes of lifting flaps, osteotomies, dental sectioning, etc. vary
according to the physical state of the dental piece to be extracted, there
are cases in which the flap must be minimal and other cases where osteotomies
are not required, each case must be analyzed individually always following
the steps mentioned before. |
| INDICATION OF A SURGICAL EXTRACTION |
In
any extraction, we must be prepared to handle any inconvenience that may
arise, the most frequent accident is the fracture of a crown leaving the
root inside the alveoli (tooth socket), also very common is the fracture
of a part of the root or of a pinnacle. |
There are a series of indications for a surgical extraction:
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Diferent
cases on included dental pieces, candidates for surgical extraction. Molar
included. TAC to study the relationship with the sinus. |
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Other
cases in which a surgical extraction is needed. Radicular cavities, included
extra teeth, included molars, molars with deep cavities that will fracture
with the extraction. |
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More
surgical cases. Cervical fracture. Internal radicular reabsorption. Extra
molar included. Included molar with retention cyst. Ectopic included premolar. |
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| SURGICAL TECHNIQUE | |
The
incision must warrantee the blood flow to the flaps, the incision should
be in a place where the osteotomy is not done, this means that when suturing
we must rest on the entire bone. The incision is done from the posterior
dental piece, following the gingival border, continuing trough the area
to intervene until the contiguous teeth, and from there to the end of
the vestibule. Frequently it is done in the vestibular area. This incision
is in an L shape. |
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Incision
that extends to piece 47 and to the end of the vestibule |
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Continuing
on the periosteotome to lift the mucoperiostic flap, all the supraoseum
structures must be lifted (mucous, submucosa and periosteum), then the
flap is separated using the Minnesota or Langenbeck separator, delicately
trying to avoid any post operation complications. |
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Flap
separated using the Minnesota separator |
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This procedure is based on eliminating the alveolar bone, generally vestibular, until the place where the dental piece or radicular remain to be removed is. This can be done using a bur, a scapula or rongeur forceps, the most common is the surgical bur that is done under a constant irrigation of saline solution, the process starts with a rounded tungsten bur Nº8. Extreme care must be taken when reaching the areas in which neighboring structures can be damaged: second area superior premolar, and first molar vicinity in the maxillary bed, in the jaw the premolar zone and mental foramen and in the third molar area the dental conduct. High-speed surgical turbines can be used but always accompanied with great irrigation. Osteotomies
must be as economical as possible, eliminating the least amount of bones
structure, although nowadays there are techniques to regenerate bone
structure in a very efficient manner (mention in other web chapters)
using plasma rich in growth enhancers (Dr. Eduardo Anitua. Vitoria). |
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Osteotomy
with rotating instruments. Surgical micro motor |
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Once
the dental piece or the rest of the radicular has been visualized the
extraction takes place using elevators and forceps mentioned in the previous
chapter of the web. |
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Dental piece extraction |
Once
the dental extraction has been completed, the cavity must be cleaned,
debring the alveolar and the periapical area in case of granuloma, cut
esfaceled tissues, remodel bone edges and eliminate bone splinters that
may stay free. |
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Clean and suture wound |
| Different cases may be considered: | |
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This is the most common case, while extracting a dental piece this one may fracture leaving the roots inside the dental socket. The difficulty in the extraction of radicular remains will depend on where the fracture line lays. In uniradicular pieces, if the fracture is over the bone or supra gingival, then with the help of an inferior roots forceps or a bayonet place in the superior they can be extracted easily. In the case where the fracture is inside the bone, this is more complex, either place an elevator inside and use it as a lever, and if this is not possible then use a bur to introduce the elevator and use it as a lever. In case an alveolar extraction is not possible then the flap must be raised and proceed with a surgical extraction. In multiradicular
pieces, if the coronal fracture has left the roots joined, proceed to
an ondontosection using a bur, separate and with the help of forceps
or a bayonet extract the root. In case interradicular wall remains between
the roots, then they can be eliminated to facilitate access to the roots. |
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Extraction
of radicular remains using an elevator and bayonet |
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There are special techniques, for example, making a notch using a burin the fractured fragment with the intention of placing an elevator in T or S and raising the fractured part. Another is to make the extraction of apical remains with endodontics instruments inserted inside the incision and make traction. In all
cases it is not admissible to leave radicular remains inside the alveole,
but if faced with impossibility of extracting or for those less trained
it is better to leave them inside than to cause greater injury. If rests
remain, if the dental piece was vital it is advisable to eliminate the
remains of radicular pulp using endodontics instruments, making the
recovery less painful. The dentist must inform the patient of the existence
of radicular remains that have not been extracted. |
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If the remains are visible, generally they are very easy to extract, since they have already suffer and expulsive extrusion. In case the remains are inside, they can be submucoseus or intraoseus. The submucoseus, with a simple incision can be made visible and the extraction can be performed. If they are intraoseus, an surgical extraction can be done, raising the flap, making an osteotomy until the radicular remain is visible and then proceed to extract. The extraction of radicular remains and dental pieces deeply inserted and even more when in patients with thin and atrophic jaws, then they must be referred to oral surgeons highly trained. |
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This
is a technique based in dividing the dental piece into one or more segments
to facilitate it’s extraction. Using this technique extraction of
difficult pieces is possible. The indications for this procedure are the
same as in any surgical extraction, the most frequent are: incrusted pieces,
extremely decayed molars, dental pieces with radicular dilacerations,
temporal morals whose roots carry germs from the definitive piece, etc.
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Hemisection
means diving the dental piece in two parts, with the intention of preserving
one of them that even in inferior molars may serve as pillars of a bridge,
the most decayed part is extracted or both parts are kept and transformed
into two pieces that resemble inferior premolars of the inferior arch,
this is usually done when encountered with problems at the furcas of the
molars and can not be solve with periodontal surgery. Obviously the dental
piece must be endodonted and half of the pulp chamber mist be blocked. |
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Reconstruction
of the 47 piece, with hemisection and elimination of the mesial root. |
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A
radicular amputation is the elimination of a root preserving the dental
crown, the prerequisites for this procedure are failures in the endotic
treatment of any given root or furca problems related to periodontal diseases. |
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