[Mandibular distraction using a dynamic osteosynthesis system: MD-DOS. Concepts and surgical technic].

Area of Science:

• Oral and Maxillofacial Surgery
• Biomaterials and Medical Devices
• Orthodontics

Context:

• Mandibular hypoplasia and skeletal discrepancies often require surgical intervention.
• Traditional distraction osteogenesis techniques can be invasive and require general anesthesia.
• Intra-oral devices offer a less invasive alternative for mandibular lengthening.

Purpose:

• To describe the technical-surgical aspects of the mandibular distraction with a dynamic osteosynthesis system (MD-DOS).
• To evaluate the initial clinical experience with MD-DOS in 35 patients undergoing mandibular lengthening.
• To highlight key surgical parameters for successful outcomes with this intra-oral distraction device.

Summary:

• The MD-DOS is an intra-oral mandibular distractor featuring a horizontal posterior fixation screw-implant, vertical hinge, telescopic distraction module, and anterior fixation unit.
• It was primarily indicated for mandibular lengthening in Angle Class II deep bite cases, allowing simultaneous third molar extraction.
• Critical surgical considerations include horizontal PFU placement, use of specific screw lengths, segment mobilization, and device proximity to the dental arch.

Impact:

• MD-DOS provides a viable intra-oral surgical option for mandibular lengthening, potentially reducing invasiveness and enabling local anesthesia.
• The described technical nuances can guide surgeons in optimizing device placement and achieving successful distraction outcomes.
• This approach may improve patient comfort and reduce treatment complications in managing specific dentofacial deformities.