All-on-4 Treatment of Highly Atrophic Mandible With Mandibular V-4: Report of 2 Cases

This report contains a technical note and 2 case reports of the “all-on-4” treatment of the highly resorbed mandible. The use of 4 angled implants directed toward the midline of the mandible at 30° angles provides the advantage of increased implant length and adequate insertion torque for immediate temporization. The technique engages or perforates the inferior border with implants placed in a spaced distribution to avoid fracture of the mandible. The technique is proposed as an alternative to bone graft reconstruction.