Guided Bone Regeneration in the Posterior Mandible Using a Resorbable Metal Magnesium Membrane and Fixation Screws: A Case Report

Authors
Journal
Case Reports in Dentistry
Year
DOI
10.1155/crid/2659893
Study Type
Human
Outcome
Positive
Peer Reviewed
Yes
Country
Germany
Health Condition
Bone loss in posterior mandible
Body System
skeletal system

TL;DR

A new type of dissolvable magnesium membrane and screw successfully helped grow bone in the lower jaw, allowing for dental implants without the need for a second surgery to remove the support structure.

Key Finding

A resorbable magnesium metal membrane system successfully regenerated bone in the lower jaw within 3 months, achieving bone density sufficient for dental implant placement, while producing tingling sensations potentially linked to hydrogen gas release during the material's degradation.

Summary

This case report describes a 61-year-old patient who needed bone rebuilding in the lower jaw before dental implants could be placed. Doctors used a new magnesium-based membrane and screws (which dissolve over time) along with bone grafts to regenerate bone in a large defect. After 3 months, the bone had regrown densely enough to support two dental implants. The patient experienced tingling sensations during healing, which the doctors believe may be caused by hydrogen gas released as the magnesium material breaks down in the body.

Practical Takeaway

This is a single case report (not a controlled study) showing that magnesium-based bone regeneration materials may work as well as traditional titanium systems while avoiding the need for removal surgery. However, the tingling sensation observed suggests hydrogen gas release during degradation—the clinical significance of this is unclear and would require larger studies to understand. Anyone considering such procedures should discuss both benefits and unknowns with their dental surgeon.

Abstract

Background: Due to bone loss, implant placement in the posterior mandible is often impossible without prior augentative procedures. The reconstruction of bone defects with horizontal and vertical components using particulated bone grafts requires the placement of a mechanically stable structure for stabilization of the grafting material. Although titanium-reinforced membranes and titanium meshes have been shown to be effective in this indication, the necessity of their removal, often in a separate surgical procedure, is seen as a disadvantage. Since the introduction of a new resorbable magnesium metal membrane and fixation screw, a mechanically stable and resorbable system might provide an alternative option for guided bone regeneration (GBR) in the posterior mandible. Case Presentation: A 61-year-old patient was presented with large edentulous areas in all posterior regions and requested fixed dentures in Areas 34-36. Tooth 33 was extracted and treated with an immediate implantation of a ceramic implant, whereas Positions 34-36 were treated with a two-stage approach. The site was augmented horizontally, with a slight vertical component using autologous and allogenic bone and a new completely resorbable magnesium metal membrane and fixation screw. During the initial healing period, the patient reported a tingling sensation at the site of the augmentation. This is an observation that is specific to the magnesium products and is potentially caused by the release of hydrogen gas as the metal degrades and is resorbed. Upon re-entry at 3 months, it was clinically observed that there was a very dense and vascularized bone that was sufficient for placing two 5.5 × 10 mm ceramic dental implants. Conclusion: A completely resorbable magnesium membrane and fixation screw were able to support the bony regeneration in a large GBR situation in the posterior mandible. Due to the use of a new material for GBR, different clinical observations were made compared to the standard material choices.