The American researches intend to use 3D print technology for replacement of 75% of the skull of a patient.     
Three-dimensional printed implants may be used for restoration skull bone of the patients, suffering from cancer or those who are injured due a car accident.
“Scott Defelice”, Manager of Oxford Performance Materials emphasizes: “3D print technology has covered all sectors of orthopedic industry. The advantage of this technology refers to possibility for provision of scanned digital model of a patients’ skull and layer print of the said sensitive part by the help of a three-dimensional printer.
Precise 3D print method may be used for manufacture of tiny surfaces or those with subtle details including cellular replacement for joining bones.
This Company is regarded as one of the manufacturers and exporters of 3D print implants.   The said Company has recently obtained respective license from Food and Drug Administration of America for implanting the first 3D print skull and it is ready to perform implanting surgery on 300-400 patients whose skull has been damaged and fractured.
Researchers are working on design and manufacture of various pieces of bones of human body using 3D print technology and performing much sensitive skull implanting surgery may establish suitable grounds for such surgery on other bones accordingly.

Researchers have recently found that it is possible to easily predict extent of violence and aggression among boys only through conducting a simple test.
In the said test, a study has been done on 17 boys of 7-9 years old and value of Testosterone and Androsterone (DHEA) hormones and that of Cortisol existing in the saliva of the said boys have been measured daily.
The results of researches have revealed that concentration of the said hormones in the sample saliva shall predict extent of violation and aggression among the said kids.
Quick and simultaneous evaluation of extent of violence among adolescences is of great importance for psychiatric and clinical treatments.
Awareness about extent of stress and study of emotional conditions of adolescences, especially during maturity period, sets a desirable model for parents and educational instructors and it causes that least hurts occur for the adolescences during said period accordingly.