Peri-implant Soft Tissue Volume Changes at Small Buccal Dehiscences

Peri-implant Soft Tissue Volume Changes After Treatment of Small Buccal Dehiscence With Volume-stable Collagen Matrix or Connective Tissue Graft: a Randomized Controlled Clinical Trial

This study was designed to assess peri-implant soft tissue health, volume and marginal stability at implants sites which presented small buccal bone dehiscences (<3mm evaluated in a vertical direction) at the time of insertion. Patients will be then randomly allocated to receive grafting with connective tissue graft or volume stable collagen matrix and evaluated at 3 months after surgery and at 12 months of follow up after crown placement.

Inclusion Criteria:

• Single tooth edentulous space
• Expected small buccal bone dehiscence (≤3mm evaluated in a vertical direction) assessed according to the prosthetically guided position of an implant of 4 mm in diameter planned using the pre-surgical CBCT
• Completed non-surgical periodontal therapy (if needed)
• FMPS and FMBS < 20%

Exclusion Criteria:

• Age < 18 years old
• Pregnancy or lactation
• Heavy smokers (> 10 cigarette/day)
• Conditions or diseases contraindicating surgical interventions
• Absence of the expected small buccal bone dehiscence (≤3mm evaluated in a vertical direction) verified after implant placement
• Need for bone regeneration at the implant site