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At least 1,423 records · Page 79Linked to original sources
PubMed2004

[Use of osteoconductive materials in pediatric dental medicine].

Osteoconductive materials are well known to have the ability to form a characteristic scaffold for bone replacement. The use of these agents is mostly described in periodontal procedures. The present study deals with the use of two different osteoconductive materials used for repairing bone defects following traumatic injuries. The materials used were Bio-Oss (Geistlich) an allogenic demineralised bone and Fisiograft (Ghimas) a synthetic co-polymer of polyglicolic and polylactic acid. These materials were used in five different clinical cases with the objective to compare their typical properties during application and to evaluate radiographically and clinically their healing ability. In three cases filling of the alveolus was performed after extraction of traumatised incisors as a consequence of root resorption or fracture; two patients suffered from periodontal defects. All cases were followed every three months for at least two years and maximum 6 years. Regarding the handling of the materials all products were well accepted. From our clinical experience all modalities are found to be suitable. After clinical and radiographical evaluation normal bone formation was found in all cases without any complaints nor clinical symptoms. These clinical findings support the use of osteoconductive agents in the field of Paediatric Dentistry in well-defined indications.

Adolescent↗
PubMed2004

Mandibular third molar autotransplantation--literature review with clinical cases.

Autotransplantation of mandibular third molars in a precocious phase of development is indicated when a substitute for adjacent compromised or missing molars is needed, and when mesial movements of the posterior teeth, the resultant loss of space, and overeruption of opposing teeth and consequent changes in the occlusion must be avoided. Provided that the apices of the mandibular third molar are immature, the immediate replacement of a lost or compromised tooth usually ensures a good outcome. Transplantation of third molars helps to maintain alveolar bone and enables endosseous implantation without requiring bone regeneration. We present examples of transplantation of mandibular third molars and review the factors that affect the success or failure of this procedure, such as atraumatic extraction and adequate immobilization of the transplanted tooth and root development after transplantation. Sex or age seem to have no effect on the final outcome.

Adolescent↗
PubMed2005

[The effect of matrix metalloproteinase-1 on root surface dentin matrix: a scanning electron microscope observation].

OBJECTIVE: To observe the effect of matrix metalloproteinase-1 (MMP-1) from human host on degradation of dentin organic matrix of root dentin. METHODS: The freshly extracted caries-free impacted teeth were selected. Teeth were cut transversely under the enamel-cementum junction into dentin sections with a thickness of about 5 mm. Then all sections with removal of cementum, pulp and predentin were randomly divided into four groups. In the first group, dentin sections were demineralized with acid solution for 21 days, and then incubated with MMP-1 solution for 7 days; the second group were only treated with acid solution for 21 days; the third group were only attacked by MMP-1 solution for 7 days; and the fourth group were untreated as a control. Then all sections were dehydrated in ascending strength of alcohol, critically dried, coated with platinum, and then observed under scanning electron microscope(SEM). RESULTS: The dentin sections of root surface attacked by acid and MMP-1 showed that demineralization of dentin mineral and degradation of dentin matrix fibrae synchronously happened. The dentin matrix fibrae wasn't degradated in the groups treated with acid or MMP-1. CONCLUSION: The proteinases from human host may play an important role in the development of root surface caries. MMP-1 may distinctly degradate the organic matrix of demineralized dentin.

Dental Cementum↗
PubMed1992

[The radiological evaluation of autotransplants].

The purpose of the present study was to investigate the radiological results of 40 autotransplantations (20 molars and 20 premolars) performed in the Orthodontic Department of the University of Geneva between 1979 and 1990. The sample demonstrated persistence of pulp vitality and continuous root growth, followed however in most cases by ankylosis and replacement root resorption. The data were in accordance with previous published studies and point out an ideal developmental stage for molar and premolar transplantation to ensure pulpal and periodontal survival.

Adolescent↗
PubMed2005

Effect of topical fluoride and fluoride varnish on in vitro root surface lesions.

PURPOSE: To evaluate the effect of a fluoride varnish on demineralization and remineralization of root surfaces in vitro. METHODS: 80 caries-free teeth were selected from a large pool of extracted anterior and premolar teeth from elderly patients. Acid resistant nail varnish was painted on all surfaces except for a window (l x 4 mm) on the buccal or lingual root surfaces. Teeth were randomly divided into four treatment groups: CONTROL: washed with deionized/distilled water; Daily gel: treated with Karigel-N (5,000 ppm) for 4 minutes daily; Weekly gel: treated with Karigel-N for 4 minutes weekly; and Weekly varnish: treated with Duraflor (22,600 ppm) weekly (the varnish was removed 24 hours after each application). Teeth were then placed in a cycle of demineralization (6 hours at pH 4.3) and remineralization (17 hours at pH 7.0) for 21 days. Half the specimens of each group were brushed with no dentifrice for 10 seconds twice daily. Specimens were evaluated under polarized light microscopy and contact microradiography. The depth of each lesion and width of the remineralization bands were measured. An ANOVA model was used to assess the effect of different treatments. RESULTS: The control group had the deepest lesions and the daily gel group had the shallowest lesions. The weekly varnish group was found to have significantly shallower lesions than the weekly gel group. The varnish brushing subgroup had significantly deeper lesions than varnish non-brushing subgroup (P = 0.01). Remineralization bands were detectable in most lesions. There was no significant difference in band width between different groups (F = 0.634, P = 0.594). However, a significant difference was found when remineralization bands were calculated as percentage of lesion depth between different groups (F = 4.24, P = 0.001). The varnish non-brushing subgroup had significantly higher percentage than the control group, but daily gel non-brushing had the highest percentage. Brushing was a significant factor in the varnish group. Lesions were significantly shallower in the non-brushing varnish subgroup.

Aged↗
PubMed2005

[Correlation study between sex and age of patients and root resorption after orthodontic treatment].

PURPOSE: To investigate the relationship between root resorption related to fixed appliance and the variables including sex, age. METHODS: 44 patients were divided into four groups according to sex and age: juvenile males, juvenile females, adult males, adult females. The length of incisors was calculated according to orthopantomograph and study models of pre- and post-treatment, and the relationship between patients' sex and age and root absorption pre- and post-treatment was analyzed by paired t test. RESULTS: Root absorption occurred in every patient. There was no significant difference between the same-age groups of males and females (P<0.05); However, there was significant difference between adult groups (both males and females) and juvenile groups (P<0.01). CONCLUSION: Root absorption occurs in every fixed-appliance case. Fixed-appliance-caused root absorption has no significant correlation with sex;however, absorption of adult groups is of higher level than that of juvenile groups.

Adolescent↗
PubMedDate not supplied

[A case of appendicular supplementary root with external root resorption].

The case of a lateral maxillary incisor with a supplementary root fractured by external root resorption, is presented. The role played for the periodontal disease is shown in the clinical and radiographic achievements, and their implications in the pulpal disease. Endodontic therapy was performed and the diagnosis confirmed in the specimen histological research.

Humans↗
PubMed1990

[Complete luxation of the upper incisor. Analysis of the mid-term results. Treatment of sequelae].

The study involved 18 children aged 7 to 13 years, who all benefited from early reimplantation and appropriate immobilisation. Radicular treatment appeared to have little influence and adverse results, especially early rhizalysis, were common (50% versus 30% of good results). In the event of failure, dento-facial orthopedic treatment, where indicated, may provide a cosmetically acceptable solution.

Adolescent↗
PubMed1990

[Rates of root resorption in orthodontically moved, periodontally affected and healthy teeth].

The aim of this SEM-study was to obtain a quantitative analysis for comparing the extent of root resorption in orthodontically treated teeth, in teeth with reduced periodontium and in healthy teeth. By using a statistically valid method the highest amount of root resorption was established in orthodontically moved teeth. The teeth with loss of attachment showed a significantly higher amount of root resorption than healthy teeth. This finding complicates orthodontic treatment in teeth with reduced periodontal attachment.

Adolescent↗