Investigation of the clinical and radiographic features of osteoarthrosis of the temporomandibular joints in adolescents and young adults.

Objective: The objective of this study was to investigate the clinical and radiographic features of osteoarthrosis (OA) of the temporomandibular joints (TMJOA) in human adolescents and young adults.

Study Design: Patients (n = 4883) with temporomandibular disorders (age, 11 to 30 years) underwent clinical and radiographic examinations. The radiographic findings were classified as erosive bony changes, proliferative changes mainly, including flattening with uneven sclerosis, and osteophytes of the condyle, and bilaterally short condylar processes.

[Construction of the dioxin bioassay method based on the clonal expressed aryl hydrocarbon receptor system].

Objective: To study the specific binding of the artificial clonal aryl hydrocarbon receptor translocator (ARNT) with the natural aryl hydrocarbon receptor (AhR) and the recolonization by polyclonal antibody. The dose-response relationship with tetrachlo-rodibenzo-dioxin (TCDD) was also studied to develop TCDD detection method and the binding degree related to dose response.

Methods: (1) The target genes including AhR-PAS, AhR-C and ARNT-PAS were amplified by RT-PCR by using the total RNA purified from the liver cells of C57BL/6J mice as templates to construct pGEX-5X1 recombinants.

[Investigation on nutritional intakes for hospitalized children with blood disease].

Objective: To investigate the diet and nutritional status of hospitalized children with blood disease in order to provide nutritional guidelines.

Methods: The patients' daily dietary intakes, including breakfast, lunch, dinner and additional meals, were recorded in detail for seven consecutive days. The intake amount of various nutrients was calculated using the dietary database.

[Study on content of iodine in food in Tianjin market and iodine nutrition conditions among college students].

Objective: To know about content of iodine in foods sold in Tianjing markets presently, and the iodine nutrition conditions in college students. It was also aimed to probe the functions of the iodized salt complement with the dietary iodine intake, and whether the urine iodine could reflect dietary iodine intake.

Methods: 278 food samples in markets were collected by a randomly stratified sampling method, while the arsenic-cerium catalytic contact method was used to determine the content in food.

Localization of impacted maxillary canines and observation of adjacent incisor resorption with cone-beam computed tomography.

Objective: The aim of this study was to investigate with cone-beam computed tomography (CBCT) the locations of impacted maxillary canines and resorption of neighboring incisors.

Study Design: Two hundred ten impacted maxillary canines were analyzed using CBCT images. The locations of the impacted canines were assessed and angular and linear measurements were taken using NewTom proprietary software.

Three-dimensional evaluations of supernumerary teeth using cone-beam computed tomography for 487 cases.

Purpose: The purpose of this article is to introduce the use of cone-beam computed tomography (CBCT) for evaluation of supernumerary teeth.

Methods: The study group comprised 487 patients with a total of 626 supernumerary teeth who were examined by CBCT. Patient characteristics were recorded, and the number, location, shape, and 3-dimensional position of the supernumeraries were analyzed.

[Cloning, identification and tissue expression of novel genes differentially expressed in diabetic rats supplemented with zinc].

Objective: To clone novel gene fragments differentially expressed from diabetic rats supplemented with zinc and to detect their expression distribution in various tissues.

Methods: cDNA fragments from former research project were cloned, sequenced and BLASTn analysed. The RT-PCR of the two novel genes were made using the primers designed according to the sequence of cDNA to observe the expression changes in liver of various groups and their expression distributions in various tissues.

[Regulation of chromium on gene expression of skeletal muscles in diabetic rats].

Objective: To study the regulation of chromium on gene expression related to metabolism of skeletal muscles in diabetic rats.

Methods: Male Wistar rats were assigned to three groups: normal control group (NC), alloxan-induced diabetic control group (DM), and DM with chromium supplementation group (DM + Cr). 200 microg Cr/kg bw perday was supplemented orally for 60 days.

[Effects of chromium supplementation on IRS-1 expression of skeletal muscle in diabetic rats].

Objective: To study the effects of chromium supplementation on related gene expression to metabolism of skeletal muscles in diabetic rats.

Methods: cDNA fragments from the out related research were cloned, sequenced and its comparalarity analysis has been done. The RT-PCR were made using the primers designed according to the sequence of cDNA.

[Clinicopathologic study of a family cherubism].

Objective: To investigate the clinicopathologic features of familial cherubism and its differentiation from other giant cell lesions in jaws and the results of surgical treatments with a long-term follow-up.

Methods: Four cases of familial cherubism were reviewed and their clinical and radiographic features, histopathologic appearance, biochemical markers and surgical treatments analysed.

Results: Clinically, cherubism was characterized by bilateral painless swelling of jaws, mandibular deformity was common.

[Central giant cell lesions of the jaws: a clinicopathological study of 31 cases].

Objective: To study the clinicopathologic features of central giant cell granuloma (CGCG) of the jaws and the relationship between the pathologic features and its clinical behavior.

Methods: Histologic, radiographic and follow-up information for 31 cases of central giant cell granuloma were reviewed. The histopathologic patterns were analyzed between nonrecurrent and recurrent cases for which the following-up information was available.