[Effect of pin-point surface osteosynthesis plates in comparison with conventional osteosynthesis plate surfaces on the sub-implant bone tissue. Preliminary communication].

Treatment of bone fractures with compression plates requires contact surfaces between the implant and bone. Because of this, there is a major nutritional disturbance in bone as a result of surgery. In an animal study of minipigs, this investigation proved that the reduced contact surfaces of periosteal bone vitality and that contact aids in the prevention of osteoporosis. Our work substantiates the conclusion that the osteoporosis underneath the smooth surface plates in the vicinity of implants is a result of cortical remodeling. This effect is believed to be induced by necrosis rather than by unloading effects.