title: A systematic examination of the bone destruction pattern of the two-shot technique.
abstract: BACKGROUND
  The two-shot technique is an effective stopping power method. The precise mechanisms of action on the bone and soft-tissue structures of the skull; however, remain largely unclear. The aim of this study is to compare the terminal ballistics of the two-shot and single-shot techniques.
  
  
  METHODS
  40 fresh pigs' heads were randomly divided into 4 groups (n = 10). Either a single shot or two shots were fired at each head with a full metal jacket or a semi-jacketed bullet. Using thin-layer computed tomography and photography, the diameter of the destruction pattern and the fractures along the bullet path were then imaged and assessed.
  
  
  RESULTS
  A single shot fired with a full metal jacket bullet causes minor lateral destruction along the bullet path. With two shots fired with a full metal jacket bullet, however, the maximum diameter of the bullet path is significantly greater (P < 0.05) than it is with a single shot fired with a full metal jacket bullet. In contrast, the maximum diameter with a semi-jacketed bullet is similar with the single-shot and two-shot techniques.
  
  
  CONCLUSIONS
  With the two-shot technique, a full metal jacket bullet causes a destruction pattern that is comparable to that of a single shot fired with a semi-jacketed bullet.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Hanover Medical School, Hanover, Germany.
authors.forename: Marcus
authors.initials: M
authors.lastname: Stoetzer
authors.affiliation: Department of Anaesthesiology and Intensive Care, Medicine, Hanover Medical School, Hanover, Germany.
authors.forename: Carsten
authors.initials: C
authors.lastname: Stoetzer
authors.affiliation: Department of Oral and Maxillofacial Surgery, Hanover Medical School, Hanover, Germany.
authors.forename: Majeed
authors.initials: M
authors.lastname: Rana
authors.affiliation: Department of Oral and Maxillofacial Surgery, Hanover Medical School, Hanover, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Zeller
authors.affiliation: Department of Anaesthesiology and Intensive Care, Medicine, Hanover Medical School, Hanover, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Hanke
authors.affiliation: Department of Oral and Maxillofacial Surgery, Hanover Medical School, Hanover, Germany.
authors.forename: Nils-Claudius
authors.initials: NC
authors.lastname: Gellrich
authors.affiliation: Department of Oral and Maxillofacial Surgery, Hanover Medical School, Hanover, Germany.
authors.forename: Constantin
authors.initials: C
authors.lastname: von See
keywords: Ballistics; full metal jacket; two-shot technique