Surgical stapler firm Dextera Surgical Inc. has voluntarily filed for bankruptcy protection and agreed to a $17.3 million asset purchase by Aesculap Inc., a B. Braun company. Financial troubles were shared in November as well as potential bankruptcy filing or sale of its assets after the company experienced raw material supply changes, resulting in backordered devices. The firm intends to resolve its backorders and continue its business relationships under Aesculap.