2015年 · 第50卷第08期

Clinical practice is the most important link of medical education, and it is the main way to improve students' practical work ability, professional quality and medical ethics. The quality of clinical practice teaching is directly related to the level of medical teaching. In order to further standardize the running of schools in various places, ensure the teaching quality, and unify the national undergraduate clinical teaching objectives, the clinical practice standards of stomatology specialty are specially formulated.

Sponsored by the Oral Materials Professional Committee of Chinese Stomatological Association and hosted by Dalian Stomatological Hospital, the Ninth National Academic Exchange Conference on Oral Materials was held in Dalian from October 9 to 11, 2014. Wang Bo, Secretary-General of Chinese Stomatological Association, Ma Quanying, Deputy Secretary of the Party Committee of Dalian Municipal Health and Family Planning Commission, Ma Weidong, President of Dalian Stomatological Hospital, Lin Hong, Chairman of the 4th Oral Materials Professional Committee of Chinese Stomatological Association, and more than 150 representatives engaged in the teaching and research of dental materials from many domestic colleges and universities, general hospitals, community and private clinics attended the meeting.

Radiotherapy is an important treatment for malignant tumors of the head and neck. It can be used as the main treatment, as an adjuvant to surgery, or combined with chemotherapy. However, radiation kills tumor cells and also damages surrounding normal tissues, thus causing a series of complications, among which osteoradionecrosis of jaws (ORNJ) is one of the most serious complications. ORNJ can form spontaneously, but is more induced by suffering trauma, surgery, or tooth extraction^[1]。 At present, tooth extraction is considered to be the main risk factor for ORNJ. Patients after radiotherapy should avoid tooth extraction as much as possible in principle. However, due to the damage of radiation to salivary gland and periodontal tissue, radiotherapy patients are prone to rampant caries and progressive loss of periodontal attachment. Tissue fibrosis in the irradiated area leads to closure of teeth, which makes normal oral care obstacle, and often leads to the extraction of teeth in the irradiated area^[2]。 Although the number of tooth extractions required after radiotherapy has now been greatly reduced by pre-radiotherapy preventive measures, such as treatment of caries, extraction of non-preserved teeth, periodontal scaling and scaling, and the use of fluoride during and after radiotherapy and increased attention to the dental health of radiotherapy patients^[3]But it is still impossible to completely avoid the above situation. Therefore, we can only choose to extract the diseased tooth and take various measures at the same time to reduce the incidence of ORNJ. The prevention of tooth extraction complicated by ORNJ after radiotherapy is reviewed.

As a special group, pregnant women have been widely cared for by all walks of life, but premature delivery and other adverse pregnancy outcomes often endanger the health of pregnant women and fetuses. Premature birth, that is, the delivery of a fetus with a gestational age of less than 37 weeks, has attracted widespread attention all over the world because it may cause serious consequences such as neonatal death and neonatal neuroplasia^[1]。 However, the causes of premature birth are unknown and many inducements make it difficult to prevent and treat it. Researchers are committed to starting from many aspects, trying to find the cause and early diagnosis, prevention and treatment measures. Some researchers found that some common microbes in the oral ecosystem can be detected in the placental system, which suggests that researchers can start with the oral condition of pregnant women to explore the mechanism of premature birth^[2]。 The relationship between premature birth and other adverse pregnancy outcomes is reviewed, and the common oral microbial groups associated with premature birth in existing studies are summarized and discussed.