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At least 163 records · Page 9Linked to original sources
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

Changes in developing succedaneous teeth as a consequence of infected deciduous molars.

The need for dental treatment in paediatric dental patients is immense. The present study was carried out in fifty children in the age group of five to ten years of age with recurrent episodes of dentoalveolar infection. Advanced pulpal infections led to torsion in 54 percent, premature eruption in 46 percent, crater like bone loss in 36 percent, sequestration and dilaceration in 10 percent and 6 percent respectively. Most of the developmental disturbances could have been avoided with timely antibiotics and endodontic intervention.

Alveolar Bone Loss↗
PubMed2000

[Biological basis of orthodontic tooth movement].

The effect of orthodontic therapy is dependent of the biological possibilities and limitations of the dento-alveolar complex. Biomechanical effects determine the first phase of tooth movement. In the second phase hyalinisation occurs in almost all cases. Elimination of the hyalinised tissue is associated with undermining bone resorption. Next, 'real' tooth movement starts. At the pressure side the normal structure of the periodontal ligament is destroyed and so is the tooth attachment. At the tension side deposition of trabecular bone is found and the tooth attachment remains. The regulation of these processes is still not completely understood, but cytokines and growth factors play an important role. The biological system does not react according to a simple dose-response relation and large individual differences in susceptibility of the system exist.

Biomechanical Phenomena↗
PubMed2000

[Myth of optimal pressure].

Orthodontic tooth movement always follows the same pattern. Four phases can be distinguished. During the last phase, the linear phase, the tooth moves through the alveolar bone. One could assume that the rate of tooth displacement is related to the magnitude of the force or to the pressure in the periodontal ligament. No consensus exists on the optimal pressure for orthodontic tooth movement. In literature pressures are advocated, ranging from 2 to 30 KPa. Animal experiments show that a large range of force magnitudes results in an equal rate of tooth movement. A dose-response relation is only feasible when forces are used which are far below those used in an everyday practice.

Animals↗
PubMedDate not supplied

Frequency of alveolar bone loss adjacent to proximal caries in the primary molars and healing due to restoration of the teeth.

The frequency of alveolar bone loss adjacent to extensive proximal caries, and the effect of dental restorations on alveolar bone loss and healthy alveolar bone were examined in human primary molars. Proximal caries, contact loss, mesial drift and the presence of alveolar bone loss were recorded from 190 bite-wing radiographs from 60 boys and 46 girls. Proximal caries was evident in 297 quadrants. In 63.0% of quadrants, both primary molars had proximal caries. Contact loss was evident in 38.4% of the quadrants with proximal caries. Bone loss was found in 12.1% of the quadrants with proximal caries or 31.6% of those with contact loss. Analysis of variance for the presence of bone loss indicated statistically significant values (P less than 0.05) for one or two teeth with caries by quadrant, the presence or absence of contact loss, and age. A second examination was available for 41 children. Among these, eight out of the 36 bone defects disclosed at the first examination were present. At the second examination, after tooth restoration, healing of five bone defects was evident. These findings indicate a connection between the presence and treatment of extensive proximal caries and alveolar bone health in the primary dentition.

Alveolar Bone Loss↗
PubMed1990

A radiographic four-year follow-up study of asymptomatic mandibular third molars in young adults.

Fifty-five asymptomatic mandibular third molars (M3) in 34 dental students (mean age 20.6 years at the start of the study) were followed radiographically for 4 years. Based on clinical evaluation the 55 teeth included 20 almost erupted, 13 partly erupted and 22 non-erupted M3. The following were assessed on the radiographs: root development, level of eruption, sagittal angulation, resorption, pericoronitis/bony pockets/paradental cysts and widening of the periodontal space/dentigerous cysts. The state of 21 teeth (38 per cent) was radiographically changed at the end of the observation period. The most remarkable finding was that 15 teeth changed their sagittal angulation, all in a distal direction; five mesioangular to vertical, five vertical to distoangular, five mesioangular to distoangular. Radiographically, 13 M3 moved to a more advanced level of eruption. No real pathological osseous lesions and no root resorption were observed at initial or follow-up examinations. It is concluded that there are frequent essentially unpredictable changes in the position of M3 after the age of 19 years which may influence decisions on their removal or preservation.

Adult↗
PubMed1977

[Preprosthetic straightening of tilted lower molars with reference to the condition of the periodontium].

30 mesially tipped lower molars in 18 patients have been uprighted previous to prosthetic treatment. The uprighting was performed using arch wires, box loops and uprighting springs. The plaque and gingival conditions as well as the pocket depths and levels of periodontal attachment were assessed at the start of the treatment, after a successfully completed hygienic phase and after the uprighting of the tipped molars. Following the successful completion of the hygienic phase a significant pocket reduction was seen on all surfaces of the teeth besides a highly significant reduction of plaque and gingival index scores. As a result of the orthodontic uprighting, a further significant reduction in pocket depth, associated with a gain of periodontal attachment, was found on the mesial and lingual aspects of the molars. The results indicate that the uprighting of lower tipped molars prior to prosthetic treatment is a simple and predictable procedure to positively influence the prognosis of the teeth involved.

Crowns↗