Alveolar Ridge Preservation in Severely Damaged Molar Socket Using a Polylactic Acid Membrane Without Primary Wound...

Area of Science:

• Dental implantology
• Periodontology
• Regenerative medicine

Background:

• Severely damaged molar sockets pose challenges for dental implant placement.
• Alveolar ridge preservation (ARP) is crucial for maintaining bone dimensions.
• Primary wound closure is often desired but not always achievable.

Purpose of the Study:

• To evaluate membrane degradation, soft tissue healing, and dimensional changes after ARP in severely damaged molar sockets.
• To assess the efficacy of a polylactic acid (PLA) membrane and xenograft without primary wound closure.
• To determine the suitability of this technique for future implant placement.

Main Methods:

• 14 damaged molar sockets in 12 patients underwent ARP with deproteinized bovine bone mineral and a PLA membrane.
• No primary wound closure was performed.
• Cone-beam computed tomography (CBCT) scans were used to analyze dimensional changes at baseline, 1-2 weeks, and 6-12 months post-surgery.

Main Results:

• The PLA membrane showed no degradation at 2 weeks and partial to complete degradation by 1-2 months.
• Good soft tissue healing was observed, with full mucosal coverage by 6-12 months.
• Alveolar ridge dimensions showed a mean vertical bone graft height decrease of 2.2 mm and a mean thickness decrease of 5.0 mm after 6-12 months.

Conclusions:

• The exposed PLA membrane provides barrier function for at least 3-4 weeks in ARP of severely damaged molar sites.
• This technique facilitates subsequent implant placement without additional grafting procedures.
• Further histological evaluation of augmented bone and control sites is recommended.