[Analysis on the changing trend of mortality rate and spectrum regarding causes of death in the last recent 30 years in Hunan province].

Objective: To investigate the changing trend of mortality and the spectrum regarding causes of death in the population of Hunan, and to analyze the health-related major diseases.

Methods: With retrospective study method, a sample survey on causes of death and the related information was carried out from 2004 to 2005 among the residents in Hunan province. Results were compared with the data from a retrospective survey on causes of death in Hunan during 1973-1975 and 1990-1992, respectively.

[Development and application of a three-dimensional craniomaxillofacial measurement instrument].

Objective: To evaluate the clinical application effect of a three-dimensional craniomaxillofacial measurement instrument.

Methods: A three-dimensional craniomaxillofacial measurement instrument was developed. Twelve patients of unilateral fracture of zygoma complex were treated with the help of the three-dimensional craniomaxillofacial measurement instrument.