A hemisection is the division of a multi-root tooth, ie of a multi-root premolar or molar. This usually happens in the area of the roots, but the section can also refer to the crown part of the tooth. This serves depending on the initial situation of the necessary support of the already existing dentures.
As a rule, existing prosthetic restorations should be preserved by this step, and other much more complex measures, such as the placement of implants (artificial tooth roots), should be avoided. The hemisection is usually triggered by infected or destroyed root parts of the affected tooth. Measured by the complete extraction (removal) of the tooth, the hemisection is also to be judged as the more minimally invasive (less invasive) measure.
A hemisection is always preceded by a common root canal treatment. After the usual preparations before an operation (examination, x-ray, written informed consent) the patient gets a line anesthesia. In a lead anesthesia, the main trunk of the nerve is anesthetized at the point where it disappears in the bone. This is done with a syringe that is placed in the gum. If this process is unbearable for the patient due to chronic fear of spikes, the appropriate gum site can also be pre-wetted by an anesthetic spray. The patient then only feels a pressure.
Then, as soon as the affected area is sufficiently anesthetized, the tooth in the middle between the roots is just severed. This gives the option of leaving the healthy part of the tooth in place. The diseased half of the tooth can now be extracted (pulled), including the root.
For example, a crown can now be placed on the remaining partial tooth. He was previously subjected to a root canal, so that it now only serves as a kind of pillar or pillar for the corresponding prosthetics.