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Results for “Tooth Mobility”

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At least 649 records · Page 36Linked to original sources
PubMed1993

[Osteopontin mRNA expression in remodeling alveolar bone incident to tooth movement--visualized by in situ hybridization].

The purpose of this study was to investigate the osteopontin mRNA expression in the alveolar bone incident to the physiologic and experimental tooth movement. The upper jaws of female rats (7 weeks old) which were submitted to experimental molar tooth movement and control specimens were decalcified and sliced into paraffin sections. Osteopontin mRNA expression and tartrate-resistant acid phosphatase (TRACPase) activity were examined in the alveolar bone by use of in situ hybridization techniques and enzyme histochemistry, respectively. In the control specimens high levels of osteopontin mRNA expression was observed in the osteocytes and lining cells close to the osteoclasts which were detected by TRACPase staining in the distal areas of the tooth sockets. In the mesial tooth socket areas however, low levels of osteopontin mRNA expression was observed. In the experimental specimens high levels of osteopontin mRNA expression of both the osteoblasts and osteocytes was observed in the mesial areas of tooth sockets in response to the experimental tooth movement. These results indicated that osteopontin gene expression is related to the alveolar bone remodeling as far as the bone resorption incident to the physiologic tooth movement and that this expression level significantly increased in response to a certain mechanical stress incident to the experimental tooth movement.

Alveolar Process↗
PubMed1995

[A study on the interrelation of growth changes of upper apical base and alignment of permanent upper anterior teeth].

A comparative study was made between the crowding group and the normal aligned group to clarify the relationship between the growth of the maxilla, occlusion and the alignment of teeth. The material consisted of longitudinal dental casts and lateral cephalograms (II A, III A, III C of Hellman's dental age) taken from each of the 10 children. Differences between the two groups were investigated concerning the size of teeth dental arches and the coordinates of the landmarks. Then a factor analysis on the growth change, which the coordinates of landmarks showed, was performed. The results were as follows: 1. The differences of both the tooth size and the coordinates of the landmarks on the cephalograms were not significant. 2. From the factor analysis, it was observed that in the crowding group the migrations of the upper anterior teeth and molars were related more closely to the cranial base, the palate and the apical base, and also the dental arch migrated in unity. 3. It was suggested from the above results that although, in the normal group, the anterior teeth and molars migrated independently, stringently controlled migration of the teeth in the crowding group caused the united migration of the arch, resulting in uncompensatory accommodation of the teeth.

Child↗
PubMed1998

Preimpregnated, fiber-reinforced prostheses. Part II. Direct applications: splints and fixed partial dentures.

This article is the second in a series that describes the development, physical properties, and clinical applications of fiber-reinforced composite materials. The development of fiber-reinforced composite technology has opened new avenues for fabricating direct tooth replacements and splints that are esthetic and simple in design and execution and have the potential for excellent durability. Splinting techniques for hypermobile dentitions or postorthodontic retention and the replacement of anterior and posterior teeth using a groove preparation, a denture tooth, and a fiber-reinforced composite framework will be described.

Composite Resins↗
PubMed1975

[Apex and periapical periodontium of teeth with endodontic-endosseal pin fixation].

Teeth with endodontic-endosteal pin fixation were observed for several years and radiolucencies that could be interpreted as chronic inflammation, were found in the periapical region of these teeth. The cause is sought in the iatrogenic noxa of the originally applied method. It is recommended to expose the apex of teeth to be provided with endodontic-endosteal pin fixation and to shorten the apex by grinding off 2-3 mm.

Dental Implantation, Endosseous, Endodontic↗
PubMed1999

The effect of thyroid hormone on orthodontic tooth movement in rats.

The major goals of this study were to determine the effects of different doses of thyroxin on the rate of orthodontic tooth movement and the force-induced root resorption. In this study fifty male Sprague--Dawley rats were divided into five groups: a normal group with no intervention; a control group in which appliances were placed and 10 ml/kg i.p./day normal saline was injected; and three thyroxin groups in which appliances were placed and 5, 10 and 20/microgram/kg i.p./day L-thyroxin were administered, respectively. A fixed orthodontic appliance consisting of a 5 mm closed-coil spring was ligated between the maxillary incisor and maxillary first molar to deliver an initial force of 60 gm. The results showed that administration of 20/microgram/kg i.p./day L-thyroxin significantly increased the amount of orthodontic tooth movement (p < 0.001). The extent of root resorption as seen from scanning electron micrographs decreased with thyroxin administration.

Absorptiometry, Photon↗
PubMed2000

Implant site development using orthodontic extrusion: a case report.

One of the most important factors in the successful placement of endosseous implants is the presence of adequate alveolar bone at the recipient site. Alveolar bone loss associated with destructive periodontal disease frequently results in osseous defects that may complicate subsequent implant placement. Typically, such defects are treated prior to or at the time of implant surgery using the principles of guided bone regeneration. Under certain circumstances, however, such defects may be managed non-surgically by orthodontic extrusion. Orthodontic extrusion can be used to increase the vertical bone height and volume and to establish a more favourable soft-tissue profile prior to implant placement. The addition, the increase in the vertical osseous dimension at interproximal sites may assist in the preservation of the interdental papillae and can further enhance gingival aesthetics. This report illustrates the treatment sequence for site development with orthodontic extrusion prior to immediate implant placement.

Adult↗
PubMed1999

[Possibilities and efficacy of treating perio-endodontic syndrome type III].

The aim of the investigation was to assess two methods of the treatment of III type perio-endo syndrome by Simon, Glick and Frank. In group I only periodontic treatment was performed including scaling, root planing and curettage. In group II periodontic treatment was supplemented by endodontic therapy. The results were registered by: Plaque Index, Sulcus Bleeding Index, Sulcus Fluid Rate, Bone Lost Index EMR, pocket depth and tooth mobility; before treatment, 7 days after treatment, 6 weeks and 6 months after treatment. In group II in selected cases (teeth with vital pulp and pocket depth more than 6 mm), microbiological examination of the dental pulp and dental plaque from the pocket was carried out. The results showed that the periodontal therapy was not effective. In first group, after 6 months the teeths mobility was extend, the pocket depth was reduced by 1 mm only, in gingiva there was registered still with chronic inflammation and the bone growth was not significant. In the second group the teeth mobility was less significant, the pocket depth was reduced more than 3.5 mm, in 21% persons the gingiva was in good health condition and the bone growth was significant (7.5%). The anaerobic bacteria were incubated in 9 probes of dental pulp for 10 examinations.

Adult↗
PubMedDate not supplied

Treatment of endodontic perforations by guided tissue regeneration.

Case reports of mandibular molars with iatrogenic perforations are presented. Such perforations have been treated with internal amalgam repair or by surgical intervention. However, the potential exists for tissue migration and pocket formation. The use of guided tissue regeneration as a barrier for apical migration is beneficial in surgical treatment of perforations. Follow-up examination of perforated teeth treated with resorbable barriers showed successful repair. Results obtained with this technique offer the possibility of a successful repair for an otherwise hopeless complication of endodontic therapy.

Absorbable Implants↗
PubMedDate not supplied

Biomechanically-induced dental disease.

Malocclusion, as an etiological agent in dental disease, is among the most controversial subjects in dentistry. Bruxism has been blamed on stress and many other nondental factors. A biomechanical mechanism that serves as a contributing factor to stimulate tooth clenching and grinding is defined and used to identify the 12 common dental symptoms caused by tooth clenching and grinding. A method is proposed through which the practitioner can link the observable dental signs with the biomechanical factors for accurate diagnosis and appropriate treatment, preferably at an early stage before the damage becomes severe.

Adult↗
PubMed2000

Resin-bonded fixed partial dentures and splints in periodontally compromised patients: a 10-year follow-up.

In the present study, 139 periodontally compromised patients received a complete periodontal treatment; in 104 cases this was followed by orthodontic treatment. At the end of the entire therapy, a total of 150 Maryland restorations (69 resin-bonded fixed partial dentures and 81 resin-bonded splints) was placed and then followed for a period of up to 10 years (mean 6.7 y). Thirteen fixed partial dentures and 16 splints failed during the observation period; the 10-year cumulative survival rate from lifetable analysis was 76.2% (70.6% for fixed partial dentures and 80.7% for splints).

Adult↗
PubMed2000

Trauma to the primary and young permanent dentitions.

It is the responsibility of the dentist to stay current on the latest techniques available to treat traumatic injuries. The charts included provide most of the potential emergency treatment possibilities, recommended follow-up treatment, and final treatment outcomes essential to providing the best care for our child patients. It is also the responsibility of the dentist to use evidence-based research when adopting treatment protocols. It is not appropriate to use anecdotal or single case studies as a basis for adopting treatment protocols. It is very difficult in this area of trauma to come up with good scientific research with adequate sample sizes and long-term data. Dr. J.O. Andreasen has excellent compiled long-term research on trauma. His books, Essentials of Traumatic Injuries to the Teeth and An Atlas of Replantation and Transplantation of Teeth are two very good books for any clinical practice.

Child↗
PubMed2000

[Bruxism and overload of periodontium and implants].

Bruxism is responsible for occlusal tooth wear but can not induce nor aggravate gingivitis or periodontitis. Bruxism induces jiggling forces, which cause a clinical tooth hypermobility, radiologically seen as a widened periodontal space. Although there is no direct causal relation between bruxism and implant failure, implant overload may lead to fractures of the components and bone loss.

Bruxism↗