Tissue Expansion Improves the Outcome and Predictability for Alveolar Bone Augmentation: Prospective, Multicenter,...

Area of Science:

• Oral and Maxillofacial Surgery
• Dental Implantology
• Tissue Engineering

Background:

• Alveolar bone defects pose challenges for dental implant placement.
• Effective bone augmentation techniques are crucial for successful implant outcomes.
• Tissue expansion offers a potential method to increase soft tissue volume prior to grafting.

Purpose of the Study:

• To evaluate the efficacy of intraoral self-inflating tissue expanders for bone augmentation.
• To assess the impact of tissue expansion on subsequent implant integrity.
• To compare different grafting techniques combined with tissue expansion.

Main Methods:

• A prospective, multicenter, randomized controlled trial was conducted.
• Patients were divided into three groups: tissue expansion with tunneling graft (TET), tissue expansion with conventional bone graft (TEG), and control (no expansion).
• Evaluated outcomes included soft tissue dimensional changes, vertical bone gain, bone retention, and peri-implant marginal bone levels.

Main Results:

• Self-inflating tissue expanders resulted in significant soft tissue expansion (vertical: 5.62 mm, horizontal: 6.03 mm) without gingival thinning.
• The TEG group demonstrated significantly greater vertical bone gain (5.71 mm) compared to the control group (4.32 mm).
• The TEG group exhibited less bone resorption at 6 months compared to the control group, indicating better hard tissue integrity.

Conclusions:

• Intraoral self-inflating tissue expanders are effective for augmenting soft tissue volume.
• The combination of tissue expander use with guided bone regeneration (GBR) techniques, particularly conventional bone grafting (TEG), improves hard tissue augmentation outcomes.
• This combined approach enhances bone gain and long-term hard tissue stability, potentially improving dental implant predictability.