[Coronectomy as a surgical treatment of impacted lower molars with mandibular canal close relationship].

Searching for third molars atraumatic removal method remains a challenge in oral surgery. Method of partial removal of impacted tooth leaving a non-extracted root in the wound becomes more popular recently. Determining medical indications for this method, as well as searching for standards for its implementation is important.

[Impacted third molar root abnormality with mandibular canal close position as a presupposing factor to inferior alveolar nerve trauma].

Objective: The aim of the study is reducing the risks of surgical injury to the inferior alveolar nerve, by taking into account individual topographic and anatomical features, improving diagnostic methods, and techniques for removing retinated teeth with a close fit to the mandibular canal.

Material And Methods: An examination was conducted in the Department of Surgical Dentistry (CBCT/OPG) and surgical treatment of 223 patients, with a close fit of the roots of the retinated lower third molar to the mandibular canal. Microslips of teeth with roots intact during removal (=96) of the main group and the control group (=52) were prepared with a Micromet Remet manual petrographic machine.

[Microanatomy features in third molars roots adjacent to mandibular canal].

The Purpose: Of the study is to reduce the risk of postoperative neuropathy of the inferior alveolar nerve by improving diagnostic methods, assessment of individual topographic and anatomical features and extraction technique of impacted teeth adjacent to the mandibular canal.

Materials And Methods: According to the CBCT examination, orthopantomography and macroscopic examination of removed third molars roots (=140) the relative position of the mandibular canal and the roots of the third molars were studied.

Results: Three variants of close mandibular canal and third molars position have been identified.

[Classification of lower impacted third molars position and their interrelationship with mandibular canal].

Classification of lower Impacted third molars position and their interrelationship with mandibular canal have a great scientific, theoretical and practical importance. An attempt to systematize and classify all anatomical impacted third molars position has been made by many authors. Based on our scientific literature search, we found: 8 impacted third molars classifications, 7 third molars and mandibular canal interposition classifications, as well as 5 classifications of mandibular canal anatomical branching variants.

[Surgical treatment tactics in patients with third molars located close to mandibular canal].

The tight fit of the roots of the third molars to the mandibular canal is the main predisposing factor of injury to the inferior alveolar nerve during tooth extraction surgery. Surgical treatment of 92 patients diagnosed with pericoronitis, retention of the third molar of the mandible, close fit of the roots of the third molar to the mandibular canal was performed. Four types of close fit of the roots of the third molars to the mandibular canal were revealed, according to CBCT, OPTG and clinical data.

[Root dislocation into the mouth floor as a complication of lower impacted third molar extraction].

Root dislocation into soft tissues during lower jaw third molar extraction belongs to clinically rare complications. The thickness of the cortical plate on the third molar lingual side does not exceed 1.5 mm.

[Dental care for patients at risk of adverse reaction to local anesthetics].

The study comprised 53 patients with side effect history to local anesthetics. The reasons for the occurrence of adverse reactions to local anesthetics was analyzed, and the frequency of their occurrence in dental practice was studied. It was found that in most patients (85%) with 'allergic reactions' to local anesthetics the diagnosis was unreasonable and incompetent.