Double Centrifugation Versus Single Centrifugation of Bone Marrow Aspirate Concentrate in Sinus Floor Elevation: A Pilot Study.

Purpose: To evaluate the regenerative results of the addition of bone marrow aspirate concentrate, using a single or double centrifugation protocol, to a xenogeneic bone graft in sinus floor elevation.

Materials And Methods: Using a randomized, controlled pilot study design in 15 consecutive patients, sinus floor elevation procedures were performed with a xenogenous bone graft alone (control group, CG) or associated with bone marrow aspirate concentrate obtained by single centrifugation (single centrifugation group, SCG) or double centrifugation (double centrifugation group, DCG). In the patients in the single and double centrifugation groups, bone marrow was harvested from the iliac bone.

An update on sperm retrieval techniques for azoospermic males.

The use of non-ejaculated sperm coupled with intracytoplasmic sperm injection has become a globally established procedure for couples with azoospermic male partners who wish to have biological offspring. Surgical methods have been developed to retrieve spermatozoa from the epididymides and the testes of such patients. This article reviews the methods currently available for sperm acquisition in azoospermia, with a particular focus on the perioperative, anesthetic and technical aspects of these procedures.