Here in Cuba we teach Conductive Technique in three steps with only one puntion. We block in the first the buccal nerve, later the lingual and finally the lower alveolar.
Hello! In Chile, we teach a Inferior Alveolar technique block (tecnica de Spix), but the success rate si low for tooth extraction with 1,8ml of anesthesic (75%)
For this reason, we teach a complementary technique than a buccal nerve block and cervical supperficial nerve block in the angle of mandible (for cervical plexus)
You can see more details in this research: http://www.joralres.com/index.php/JOR/article/view/28
In Lebanon, inferior alveolar nerve block is mostly taught (lingula manibulae/Spix spine technique). One of the algorithms mostly followed states that in case when full analgesia is not attained following an IAN block, the block is repeated; if full analgesia is still not attained, intraligamentary injection is performed. (Spix (1) - Spix (2) - intraligamentary)
Some say that mylohyoid nerve innervation may be a cause of IAN block insufficiency in some cases, but little evidence has been there to support this proposition.