[Experimental research using human bone marrow mesenchymal stem cells as the seed cells for bone and cartilage tissue engineering].

Aim: To investigate the feasibility of human bone marrow mesenchymal stem cells(hMSCs) as the seed cells for bone and cartilage tissue engineering.

Methods: Purified hMSCs were cultured in-vitro and induced to differentiate into osteoblasts and chondrocytes. Cellular morphologies were observed under inverted and electron microscopes.

[Tracheoesophageal shunt for voice reconstruction after total laryngectomy to prevent from deglutition disorders].

Objective: To observe the effect of tracheoesophageal shunt on voice reconstruction after total laryngectomy.

Methods: Seventy-nine patients with laryngeal cancer of T3 and T4 stages were conducted an operation of tracheoesophageal shunt after total laryngectomy. The vertical voiced slit with a length of 0.