Complete mandibular edentulism represents a challenge in choosing a therapeutic plan. There is no universal therapy form, suitable for every patient and superior to all other treatment options. Patient requirements are individual and modified by psychosocial, economic and cultural factors, as well as gender and age. Due to the lack of bone volume and the close proximity of the lower alveolar nerve in extreme mandibular atrophy, implant therapy with conventional implants is difficult. In such clinical conditions, additional surgical interventions are indicated in which the lost bone volume is first compensated for, such as guided bone regeneration, horizontal and vertical bone block augmentation, distraction osteogenesis, transposition of the lower alveolar nerve, and ridge-split technique. Such procedures prolong the course of therapy, represent an additional financial expense, and can cause numerous complications. "Short" implants are defined as implants with 8 or less mm of intraosseous length. They act as a predictable minimally invasive alternative to ridge augmentation. By modifying thread shape and design, increasing microporosity of the implant bodies' lower surface and developing a smooth cervical surface enriched with calcium or hydroxylapatite ions, the effect of osseointegration was significantly improved. Good primary stability during implant placement is a prerequisite for the immediate loading protocol and immediate restoration of the stomatognathic system function in completely edentulous patients. Primary stability during healing is the main factor affecting the quality of osseointegration and implant prognosis. By applying the basic biomechanical principles in implant therapy, a predictable and stable result is ensured.