Miniplate osteosynthesis has become the method of choice in the surgical treatment of fractures in adults. The question arises whether or not miniplates should be used more frequently for childhood fractures as well. A clinical and experimental study of 121 fractures during the growth period was conducted to determine the criteria guiding the decision for the use of miniplates. Test in which miniscrews were unscrewed from fresh cadaver jaw bone showed that sufficient retentive forces for fracture stabilization can be achieved even with very short screws (5 mm). Miniplate osteosynthesis can also be applied in the treatment of mandibular fractures during the growth period from the eighth year of life onward.