Ohayon L, Taschieri S, Friedmann A, Del Fabbro M. Int J Oral Maxillofac Implants. 2019 May/June;34(3):681–691.

https://www.ncbi.nlm.nih.gov/pubmed/30521657

The goal of this retrospective study was to evaluate, if a collagen barrier membrane placed over the lateral bone window affects the stability of the bone graft and the displacement of bone graft particles following sinus floor augmentation.

Methods:

41 patients did underwent lateral sinus floor augmentation using cerabone®. The bone windows were either covered with collprotect® membrane (control group, n=17) or left uncovered (test group, n=24). All sites were closed by the flap. CBCTs were taken immediately after the surgery, and seven days as well as six months post-operative in order to evaluate bone graft stability and bone graft particle displacement. Post-surgical morbidity was analyzed using a visual analog scale (VAS) seven days after the surgical intervention.

Results:

• Mean displacement of the bone graft particles six months post-operative was significantly greater in the test group (3.8±3.1 mm) than in the control group (0.5±0.4 mm)
• Post-operative morbidity was significantly more pronounced in the test group (pain 3.3±1.4/swelling 4.3±4.5) than in the control group (2.1±0.9/2.7±0.9)

Conclusion:  

The authors concluded that a barrier membrane placed over the lateral bone window helped preventing bone graft particles displacement thus reducing post-operative morbidity.

Dr. Laurent Ohayon, France