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.
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:
- Incision and dissection of the mucous and periosteum (mucoperiostical Flap)
- Osteotomy
- Luxation and extraction of the dental piece
- Curettage and cleaning of the worked zone and bone regulation
- Suture

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:

  • Retained dental pieces: by displacement of continuous teeth
  • Included dental pieces: being submucouse or interbone
   
Diferent cases on included dental pieces, candidates for surgical extraction. Molar included. TAC to study the relationship with the sinus.
   
  • Endodontal dental pieces: since they tend to be more fragile and possibly stiff
  • Dental pieces with great radicular dilacerations, great radicular curvature tend to fracture easily
   
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.
   
  • Dental pieces with radicular hypercementosis, the size of the root is bigger that the space of the alveoli
  • Dental pieces with great root divergence
  • Dental pieces with deep subgyngival cavities, especially cervical cavities that when pressed with a forceps or a elevator they will break
  • Teeth with internal or external reabsorption
   
More surgical cases. Cervical fracture. Internal radicular reabsorption. Extra molar included. Included molar with retention cyst. Ectopic included premolar.
   
  • Dental pieces with periapical problems that can not be removed trough the dental alveoli
  • Ectopic teeth in situations where a forceps can not be used
   
SURGICAL TECHNIQUE
 
INCISION
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.
 
Incision that extends to piece 47 and to the end of the vestibule
 
FLAPS (Mucoperiostic Rupture)
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.
 
Flap separated using the Minnesota separator
 
LIBERATING OSTEOTOMY

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).

 
Osteotomy with rotating instruments. Surgical micro motor
   
EXTRACTION
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.
 
Dental piece extraction
   
CLEANING AND WOUND SUTURE
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.
 
Clean and suture wound
   
SURGICAL EXTRACTION OF RADICULAR REMAINS
 
Different cases may be considered:
  • DENTAL PIECE FRACTURE IN A SIMPLE DENTAL EXTRACTION

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.

 
Extraction of radicular remains using an elevator and bayonet
 

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.

 
  • EXTRACTION OF OLD RADICULAR REMAINS

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.

   
DENTAL SECTION
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.
 
RADICULAR HEMISECTION AND AMPUTATION
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.
 
Reconstruction of the 47 piece, with hemisection and elimination of the mesial root.
 
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.
 
 
Last Updated: 10-19-2002
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