The use of loco-regional anesthesia in the mandibular foramen (Inferior Alveolar Nerve Block - IANB) is part of the therapeutic arsenal for any Dental Surgeon or specialist in Oral Surgery or Endodontics. These local-regional anesthesias are indicated for restorative, endodontic and single and/or multiple surgical treatments of mandibular teeth homolateral to the infiltrated side. The so-called conventional freehand reference technique was described by William Steward Halsted and compared in numerous studies to other truncal anesthesia techniques such as Gow Gates or even Akinosi-Vazirani.~Certain anatomical landmarks must be accurately identified by the operator to reduce the percentage of failure of this technique. Conventional IANB is associated with a 40% failure rate in surgical removal of the lower third molars included, which is the highest percentage of all clinical failures obtained under local anesthesia.~The purpose of this study is to compare the success rate of a IANB guidance device, EZ-Block®, with traditional freehand anatomic administration in the surgical removal of impacted lower third molars.~The use of the EZ-BLOCK® guidance system would increase the success rate significantly and reproducibly because it is based on individualized anatomical foundations and is therefore adapted to inter-patient variability.
The success rates reported in the literature for the various truncal anesthesia techniques are extremely variable and have shown a lack of reproducibility of the techniques. The use of the EZ-BLOCK® guidance system would increase this success rate in a significant and reproducible way, as it is based on individualized anatomical foundations and therefore adapted to inter-patient variability.~In order to determine its effectiveness in clinical situations encountered in current practice, a comparative clinical study of the 2 techniques (freehand reference technique and using the EZ-BLOCK® system) is necessary.