[The antibacterial efficacy to obligate anaerobes isolated from the infected root canal of deciduous teeth].

OBJECTIVE:The antibacterial efficacy of 7 kinds drugs to 4 kinds obligate anaerobes isolated from the infected canal of deciduous teeth and 4 kinds standard strains was tested.The results showed that FC,Metronidazole,Chloromycin,Cefradium have strong antibacterial effects on experimental strains,but Erythromycin and Norvancomycin Hydrochloridum were not so effective.

[The advanced studies on surgical treatment about the patients of TMJ ankylosis and OSAS].

OBJECTIVE: Through the treatment on the 10 patients suffered TMJ ankylosis and OSAS,by means of the TMJ reconstruction combining orthognathic surgery,it is demonstrated that the treatment on the patients must include relieve the TMJ anklosis,correct the maxillofacial deformitis and specially enlarge upper airway space.

[A primary study on the relationship between the weight of newborn and sucking pressure].

OBJECTIVE:In this study, the main aim is to investigate the relationship between the weight of newborn and sucking pressure.the relationship between the weight of 26 cases health newborn and sucking pressure was analyzed with "oral air manometers computer analysis system".The result showed that the relationship of both corelated positively.

[Developmental carcinogenesis in the cheek pouch of the hamster induced by DMBA using on light microscope].

OBJECTIVE:In this study that the DMBA was applicated to induce the premalignantal changes of the cheek pouches of 89 hamsters in various stage,the result was shown that the slight epithelial displasia was occured 3 weeks later,the medium displasia was occured 5 weeks later,and the severe displasia or the carcinoma in situ was occured 6-9 weeks later.It is suggested that the suitable experimental period of the hamster's carcinogenesis is during 1-3 weeks.

[Stess analysis of conical telescope denture using on the prosthodontic treatment for basic teeth combined periodontal diseases].

OBJECTIVE:Periodontal splints were made both on patients with peridontal absorption of three different degrees and on normal situation respectively followed by finite element calculation.The result sugree that the stesses of the supporting tissues redistributed during mastication in accordance with different degrees of periodontal absorption.The more obvious of the pcriodontal absorption is the more stress value of the periodontal supporting tissue decrease,while those of the subbasal supporting tissues increase.

[A study on speech training methods for patients following cleft palate repair].

OBJECTIVE:This study is to improve speech articulations of patients following cleft palate repair. METHODS: 20 cases were treated with systemic speech trainning. The methods included testing speech articulations of pre-and post-training blowing and systemic speech training whose program was consonant (first step), syllable (second), word (third), sentence (forth), and (fifth).

[The effects of fluoride and dexamethasone on the phenotypic development of osteoblast grown on the demineralized dental root surface].

OBJECTIVE: To investigate the effects of the phenotypic development of osteoblast growing on the periodontitis affected root surface in the condition with fluoride and dexamethasone.METHODS:Cell culture technique in vitro had been used to study the growth condition of MC3T3-E1 osteoblast line on the surf ace of cementum treated with various methods.RESULTS:The present study showed that osteoblast treated with fluoride and dexamethasone had a better cellular growth behavior.

[The effect of fluoride on bone extracellular matrix proteins expression in rat calvarial osteoblast in culture].

OBJECTIVE:The expression of various non-collagenous proteins and collagen protein on the rat fetal calvarial osteoblast cultured in low doses fluoride condition in vitro had been studied.METHODS:Our study applied the immunohistochemistry technique to detect the expression of bone sialoprotein, osteocalcin, osteopontin, alkaline phosphatase and type I collagen expressed in the bone matrix.RESULTS:They demonstrated that there were difference in the location and function of the collagenous and non-collagenous proteins in the development of bone matrix.

[The influence of fluoride on the development of the osteoblast phenotype in rat calvarial osteoblasts: an in vitro study].

OBJECTIVE:The effects of low doses fluoride on the phenotypic development of rat fetal calvarial osteoblast were studied because the cellular mechanism of fluoride promotes the increasing of bone volume clinically is unclear. METHODS:The influence of fluoride on the rat first passage osteoblast were valuated by histochemistry, enzyme-histochemistry and electron microanalysis in vitro.RESULTS:The study had revealed that not only the bone tubular and the degree of mineralization, but also the activity expression of alkaline phosphatase of osteoblasts in fluoride group were better than the control group.

[Cephalometric analysis of maxillary development in adult unoperated cleft palate patients].

OBJECTIVE: Analysis of maxillary development in adult unoperated cleft palate patients.METHODS:Lateral cephalometric radiographs of 37 case of adult unoperated cleft palate (UCP) patients were analyzed with computerized aided image system, 20 normal adults were as a control group.RESULTS: Showed that maxillary anteroposterior distance of UCP group is shorter than normal control group (P<0.

[Evaluation of speech aid's function with air flow pressure techniques].

OBJECTIVE:To evaluated of speech aid's function with air flow pressure techniques. METHODS: The study group contained 12 patients with cleft palate,submucous cleft palate and congenital velopharyngeal insufficiency who had been found to have VPI(velopharyngeal insufficiciency) and hypernasal speech and were scheduled for speech aid. RESULTS: It was confirmed that study was to assess the relationship between oral-nasal resonance with and without the speech aid.

[Study on the maturation of cervical vertebra for 208 cases Shanghai adolescents growth].

OBJECTIVE:To establish a set of normal values of maturation stages of cervical vertebra for Shanghai adolescents and to provide valid reference index for assessing skeletal age while making diagnosis and treatment plan.METHODS:208 Shanghai adolescents from 11 to 15 years of age were investigated by lateral cephalometric radiographs. The growth status and the relationship of C2-C5 cervical vertebra were observed.

[A correlate study on the first cervical vertebra and mandibular growth:A comparison of Shanghai females between 12 and 15 years old].

OBJECTIVE:To study the correlation between the cervical vertebra and mandibular growth and to reveal the intrinsic rule of the progress of individual growth, especially the trend of craniofacial development.METHODS:The morphological features of the first cervical vertebra and certain variables of craniofacial in lateral cephalometric radiographs from Shanghai females between 12 and 15 years old were measured and correlated. A set of normal values of the atlas vertebra shape of Shanghai 12 and 15 years old females were established.

[Study on the relationship among ossification of finger's bone, maxillary and mandibular lengths and body height for Shanghai adolescents aged between 11-15 years old].

OBJECTIVE:To research the intrinsic relationship in the growth and development progress of adolescents and to provide scientific basis for orthodontic diagnosis and treatment.METHODS:Sample included 125 Shanghai adolescents between 11-15 years old, and the relationship among maxillary length, mandibular length, ossification of finger's bone, body height and the age of first coming of menstruation on female was studied.RESULTS:The ossification of finger's bone, the increase of maxilla and mandibular lengths and the body height of Shanghai adolescents between 11-15 years old keep the same pace tendency.

[The method of getting the prime diagnostic factors of anterior crossbite in early permanent dentition].

OBJECTIVE:We want to select the prime diagnostic factors of anterior corssibe which cna be used to identify the dental and skeletal anterior crossbite. METHODS: From 85 anterior crossbite patients in early permanent dentistion with accurate diagnosis we selected 70 cases to get the prime diagnostic factors by using stepwise discriminant analysis. They were checked by the other 15 cases, We could assess the effects of the factors by calculating their contribution rates.

[Analysis of 12 cases of the intraosseous vascular malformation].

OBJECTIVE:This study is to discuss the main points of diagnosis and treatments of the intraosseous vascular malformations. METHODS: 12 cases have been compared and analyzed on the respects of the clinical and radiographic presentations and surgery methods. RESULTS: All the lesions were treated by radical resectins.

[The evaluation of computer-aided simulating system in orthognathic surgery].

OBJECTIVE: The purpose of this study is to evaluate the reliabillty of computer-aided simulating system for orthognathic system. METHODS: 24 cases with dentofacial deformities were undergone treatment of orthognathic surgery.The presurgical cephalograms and profiles were input to the computer and were digitized.

[A bacteriology analysis from infected root canals of human deciduous teeth].

OBJECTIVE: To provide a basis for therapy and prevention, the flora of infected root canals of human deciduous teeth was analyzed.METHODS: By immediate-enzyme method, the bacteria compositions of 22 cases with infected root canals of deciduous teeth, including 8 cases with acute periapical inflammation and 14 with chronic ones, were examined. RESULTS: Among 240 strains bactera, 200 strains were obligate anaerobes, belonging to the genera peptostreptococcus, bacteriodes, veillonella, eubacterrum, propionibacterium, actinomyces and fusobacterium.

[Flow cytometry dynamic study binding to bromodeoxyuridine in golden hamster cheek pouch premalignancy].

OBJECTIVE:In order to study cellular dynamicfeatures in carcinoma and premalignancy originated inepithelial tissue. METHODS: The golden hamster pouch premalignant model with dimethylbenzanthracence(DMBA) smeared was established by Salley and detected with flow cytometry(FCM) binding to bromodeoxyuridine(BRDU),30 Syrian golden hamsters were grouped and done contrast study. RESULTS: The cellular lesions were aggravated gradually along with extention of smeared DMBA microstopically,FCM detective results demonstrated that the detective rate of Sporiod cell between contrast and smeared group had significant difference.

[The influences of lanthanum,cerium and fluoride on the activity of glucosyltransferase(GTF) and adherence of oral cariogenic bacteria in vitro].

OBJECTIVE:Study of the influences of lanthanum,cerium and fluoride on the activity of flucosyltransferase(GTF) and adherence of oral cariogenic bacteria. METHODS: The influences of lanthanum,certium and fluoride on the acitivity of GTF and adherences of Steptococcus sobrinus 6715,Lactobacillus 4356 and Actinomycetes viscosus 19246 in vitro were investigated. RESULTS: Lanthanum and cerium can efficiently inhibit the acitivity of GTF than fluoride.