Applications and progress of chemical derivatization in targeted metabolomics LC-MS analysis / 中国药科大学学报

@#The changes of metabolic profile are closely related to external stimulus, and the concentration of the metabolite can directly reflect the physiological or pathological states of organisms. Therefore, the quantitative detection of metabolites is necessary. However, traditional targeted metabolomic methods have such drawbacks as narrow coverage and low sensitivity. In recent years, derivatization techniques have developed rapidly in the field of metabolomics. Derivatization reagents for amine, hydroxyl, carboxyl, carbonyl, hydrosulphonyl and other groups have been used in metabolomics research. This paper introduces various derivatization reactions and their applications according to group classification and reviewes the characteristics of multi-group derivatization techniques, with a propect of their research directions and challenges.

Orthognathic surgery in the treatment of condylar osteochondroma / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To evaluate the effect of orthognathic surgery in the treatment of condylar osteochondroma.</p><p><b>METHODS</b>A total of 12 cases of condylar osteochondroma were treated with Le Fort I osteotomy, intraoral vertical ramus osteotomy, sagittal split ramus osteotomy and genioplasty.</p><p><b>RESULTS</b>No recurrence of condylar osteochondroma was observed in all 12 cases two years after the treatments. Facial asymmetry was obviously corrected.</p><p><b>CONCLUSION</b>The orthognathic surgery methods are advantageous in improving facial figure without scar development in the treatment of condylar osteochondroma.</p>

Intraoral approach for the correction of prominent mandibular angle with masseter muscle hypertrophy / 中华医学美学美容杂志

Objective To evaluate the surgical corrective results of prominent mandibular angle with masseter muscle hypertrophy by using intraoral approach. Methods One hundred and twenty three cases with various degrees of prominent mandibular angle with masseter muscle hypertrophy were treated through intraoral approach. The basic surgical procedures included masseter muscle reduction (type Ⅰ), mandibular angle osteotomy (type Ⅱ) and angle-splitting osteotomy (type Ⅲ). The type Ⅰ was completed in 4 cases, type Ⅱin 16 cases, type Ⅲ + type Ⅰ in 56 cases, type Ⅲ in 19 cases, type Ⅲ + type Ⅰ in 9 cases, type Ⅲ + type II in 12 cases, type Ⅲ + type Ⅱ+ type Ⅰ in 7 cases. Genioplasty was simultaneously performed in 69 cases.Results The overwidth of the lower face was effectively corrected. The cosmetic results, as determined by both patients and surgeons, were good. No complications, such as facial never injury, or inferior alveolar never injury, occurred in any patients. Conclusions In order to reach good cosmetic results at the patients' lateral view and frontal view, considerations should be determined according to the degrees of the deformities and patient's desires, to choose suitable surgical procedures.