Lateral Ridge Augmentation Using Two Graft Combination and a Cross-linked Collagen Membrane

Bone width at the implant site is an important prerequisite for a predictable and long-term prognosis in implant dentistry. Different types of membranes and bone grafts are used in the GBR procedure. However, there is a lack of studies in the literature about the combination allograft/xenograft. The aim of the present trial is to compare two different bone graft combinations (autogenous-xenogeneic and allogeneic-xenogeneic) covered with a cross-linked collagen membrane in a horizontal alveolar ridge augmentation (without simultaneous implant placement).

Inclusion criteria

• Healthy patients, non-smokers or smokers <10 cigarettes/day.
• Age between 20 and 75.
• Full mouth bleeding score (FmBS) <20 %.
• Full mouth plaque score (FmPS) <15%.
• Residual bone width < 5 mm and adequate bone height in the maxilla and the mandible.
• Tooth extraction performed at least 6 weeks before surgery.
• Presence of enough teeth to support an occlusal stent/radiographic guide.

Exclusion criteria

• Systemic diseases.
• Heavy smokers (> 10 cigarettes/day).
• History of radiotherapy in the head and neck region in the last 5 years.
• Active periodontitis on the remaining teeth.
• Pregnancy.
• Intake of medications that may have an effect on bone turnover and mucosal healing (i.e., tetracycline within the last month, steroids within the last 6 months, bisphosphonates or fluorides at bone therapeutic levels, vitamin D and metabolites at therapeutic levels within the last 6 months).