Research Progress and Prospect of Facial Reconstruction in Forensic Science / 法医学杂志

Facial reconstruction is a way to recover facial morphology by restoring soft tissues based on unidentified skulls using the knowledge of anatomy, anthropology, aesthetics, and computer science. It is applied in forensic science, oral plastic surgery and archeology, and especially plays an important role in the identification of the origin of the unknown corpses in forensic science. Facial reconstruction is the supplementary means of identification when other approaches （such as DNA comparison, imaging matching, dental records comparison, etc.） cannot identify individual identity. Facial soft tissue thickness （FSTT） is the basis of facial reconstruction and with the development of imaging and computer science, the techniques for measuring FSTT are improving rapidly and many related researches have appeared. This paper summarizes the application of facial reconstruction in forensic science, the accuracy of different methods and the research progress of this field to provide reference to this field.

Effects of ovariectomy on electromyography and phenotype in rat genioglossus / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the effects of ovariectomy on genioglossus (GG) electromyography and myofibre phenotype in female rats and to explore the proposal mechanisms underling ovarian hormone protecting to the patency of upper airway (UA).</p><p><b>METHODS</b>30 female Sprague-Dawley rats were randomly assigned to three groups: normal group (NORMAL), sham group (SHAM) and ovariectomized group (OVX). Six weeks later, electromyography activity of the genioglossus (EMGgg) was obtained from inserted bipolar electrodes. The integrated EMG (iEMG) was analyed. Genioglossus was stained with ATPase staining. The fibre phenotype composition and cross sectional area (CSA) of type II A and II B/ II X fibres were measured.</p><p><b>RESULTS</b>EMGgg had no significant variety between the normal and sham group (P >0.05). Compared to normal group, iEMG was significantly decreased in OVX group (P < 0.05). GG myofibres were composed of II phenotye, including II A (40.27 +/- 1.01)% and II B/ II X (59.73 +/- 1.01)%, fibres composition and CSA of types II A and II B/II X had no significant variety between the normal and sham group. Compared to normal group, fibres composition had no significant variety in OVX group (P > 0.05), but the CSA of type II A was significantly decreased (P < 0.05).</p><p><b>CONCLUSION</b>The decreased EMGgg of ovariectomized rat maybe relates to the decrease of CSA in type II A fibre. Ovarian hormone may protect the patency of upper airway through affecting muscle function of UA dilator.</p>