Research progress in peri-implant soft tissue engineering augmentation method / 中华口腔医学杂志

The sufficiency of hard and soft tissue at the implant site is the guarantee of long-term function, health and the appearance of implant denture. Problem of soft tissue recession at the implant site has always been bothering dentists. Traditional methods for augmentation of soft tissue such as gingival transplantation have disadvantages of instability of the increased soft-tissue and more trauma. Lately the methods that base on tissue engineering to increase the soft tissue of peri-implant sites have drawn great attention. This review focuses on the current methods of peri-implant restoration through tissue engineering, seed cells, biological scaffolds and cytokines.

The study of the pulse signals of atherosclerosis based on Hilbert-Huang transform and sample entropy / 生物医学工程学杂志

Atherosclerosis, one of the serious cardiovascular diseases, is very harmful to human bodies. The early diagnosis of arteriosclerosis is of great significance. In this paper, we collected pulse from healthy adults and patients with atherosclerosis. Using Hilbert-Huang Transform (HHT) and sample entropy, we analyzed the pulse and found the differences between the patients and healthy people. After using the empirical mode decomposition (EMD) to process pulse signals, we calculated sample entropy for each intrinsic mode function (IMF), and did statistical analysis of the IMF. The sample entropy of a first IMF from patients with atherosclerosis is less than that from healthy persons, and there was significant differences between the healthy and patient groups. In calculating the energy value of different frequencies on the HHT marginal spectrum, we found the energy in patients moved to low frequencies obviously. The energy value of frequency between 0-1 Hz was significantly higher in patients than in the healthy group. The t test also showed that the values between the two groups had significant differences. The statistics and figures showed that early diagnosis was feasible based on HHT and sample entropy.

Research status and progress in monitoring of anesthesia depth / 国际生物医学工程杂志

Anesthesia is the most crucial part of clinical surgery in modern medicine,and it is highly risked due to complications of general anesthesia.Researches have proved that intraoperation monitoring depth of anesthesia efficiently reduced the dosage of anesthetics and led to earlier recovery,so that the risk of anesthesia has been minimized.Currently,the research on depth of anesthesia monitoring methods has become an international hotspot.This paper reviews the methods for monitoring depth of anesthesia,including bispectral index,auditory evoked potential,Entropy and heart rate variability,and highlights advantages,disadvantages of these methods and the relationship between these methods.This paper also introduces the relationship between heart rate variability and the depth of anesthesia monitoring,the method for analyzing heart rate variability in both time domain and frequency domain,which laid a theoretical foundation for the research on monitoring depth of anesthesia.

The effect of excessive internet use on N400 event-related potentials / 生物医学工程学杂志

This investigation was made on the characteristic of the N400 event-related potentials in excessive internet users by analyzing the N400 difference between the excessive internet users (trial team) and normal subjects (control team); the aim was to provide a theoretic basis for the diagnosis and treatment of excessive internet users. Ten right-handed excessive internet users and ten healthy right-handed volunteers aged 20 to 25 years were recruited to attend the experimentation of single Chinese character with semantically matching or mismatching ending strokes. The N400 displayed obvious difference between the excessive internet users and normal subjects when they were confronted with mis-matching ending strokes of single simple Chinese character. The N400 amplitude of the trial team was significantly lower than that of the control team (P<0.05), and the N400 latency of the trial team was significantly earlier than that of the control team (P<0.05). In addition, the distribution of the N400 in the brain was more wide-spread in the control team than in the trial team. These results showed there was significant difference in N400 between the excessive internet users and the normal subjects.

Influence of excessive internet use on auditory event-related potential / 生物医学工程学杂志

At present, young people's internet addiction has become a serious social problem and on important concern in China. Comparison studies of auditory event-related potential (ERP) between 9 excessive internet users and 9 common internet users were carried out. The obvious influences of excessive internet use on the users were observed. The result suggests that excessive internet use may have some influences on cerebral cognitive function.

Human excited electroencephalogram model and its location in brain / 生物医学工程学杂志

The aim of this study was to identify the characteristics of human excited electroencephalogram and the excited location in brain. The subjects were excited by taking a fixed quantity of caffeine. Electroencephalographic signals were collected using with 128 channels Phoenix Digital EEG and compared before and after the subjects drank coffee. The results showed obvious differences and compared with the ones before being excited electroencephalogram. After being excited we found that the lower frequency composition was restrained in the region below 10 Hz, the high frequency composition was increased significantly,and a wave crest of 38 Hz was produced in every acquisition point with the height around 200. Then the excited region was located in brain with the software of ASA 3 Course (designed by ANT company of Germany) and found that the excited location was focused on the area of the middle abdomen in the pons' side near bulbar when a person was exciting.