Mucogingival pouch flap for sandwich bone augmentation: technique and rationale

Area of Science:

• Dental implantology
• Periodontology
• Regenerative medicine

Background:

• Sandwich bone augmentation is a technique for bone regeneration around dental implants.
• Buccal dehiscence defects present challenges in achieving optimal esthetic and functional outcomes.
• Existing flap designs may have limitations in graft containment and soft tissue coverage.

Purpose of the Study:

• To introduce and evaluate a novel flap design, the mucogingival pouch flap (MPF).
• To assess the efficacy of MPF in conjunction with sandwich bone augmentation for treating implant-associated buccal dehiscence defects.
• To analyze the impact of MPF on graft retention, membrane exposure, papilla preservation, and esthetics.

Main Methods:

• A novel flap design, the mucogingival pouch flap (MPF), was developed.
• MPF involves pouch flap reflection via mucogingival junction extension incisions.
• Four implant-associated buccal dehiscence defects in three patients were treated using sandwich bone augmentation combined with MPF.

Main Results:

• All treated defects showed successful bone regeneration.
• New bone thickness ranged from 1.5-3.5 mm at 6 months post-treatment.
• Bone height fill ranged from 84% to 100% at 6 months.
• MPF facilitated improved graft retention and soft tissue camouflage.

Conclusions:

• The mucogingival pouch flap (MPF) is a promising technique for enhancing sandwich bone augmentation.
• MPF offers advantages in graft containment, minimizes membrane exposure, and improves esthetic outcomes.
• MPF represents a valuable addition to the surgical armamentarium for managing bone defects in implant dentistry.