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At least 145 records · Page 8Linked to original sources
PubMed1995

[Observation of alveolar bone remodeling accompanied with tooth movement by in situ hybridization--expression of type I collagen and bone sialoprotein mRNAs].

The purpose of this study was to investigate expression of type I collagen and bone sialoprotein (BSP) mRNAs in the alveolar bone accompanied with tooth movement. The right side of the upper jaw of the rat was used for orthodontic tooth movement, and the left side was used for physiological tooth movement. After the proper number of days of movement, histological specimens were decalcified and sliced into paraffin sections. The expression of mRNAs was examined by the in situ hybridization method. In the samples of physiological tooth movement, a high level of expression in both mRNAs was observed in osteoblasts along the mineralization front and adjacent osteocytes in the interradicular septum (IRS). In contrast, a low level of mRNA expression was observed on the opposite side of the IRS. In the specimens of experimental tooth movement, a high level of expression was detected in the osteoblasts on the tension side of IRS, but negligible reaction in those on the compression side. These results suggest that BSP gene expression as well as that of collagen are related not only to mineralization in physiological bone remodeling but also to the process by activated osteoblasts induced by orthodontic force. In addition, response to the artificial force was observed in osteocytes in IRS.

Animals↗
PubMedDate not supplied

Regaining space by using elastic orthodontic separators.

When an extensive carious lesion is present, interproximal space may be lost due to drifting of adjacent teeth. This may encroach upon the space needed to restore the tooth to proper occlusal and interproximal contours. Although the space may be regained with conventional orthodontics, this may not be an option in some cases due to financial or technical considerations. The outlined clinical technique uses elastic orthodontic separators in conjunction with an incrementally modified acrylic crown to regain lost interproximal space. The results of this technique were achieved rapidly and allowed for the placement of a physiologically contoured restoration. This procedure is technically simple, provides quick results, and is less expensive for the patient than conventional orthodontics.

Adult↗
PubMedDate not supplied

Effect of constant currents on orthodontic tooth movement in the cat.

Constant 10 muA currents were applied to the mandibles of 12 cats via electrodes implanted mesial and distal to premolars undergoing orthodontic treatment. A third were moved toward the cathode, a third were moved toward the anode, and a third were moved in the absence of an applied field. No significant difference in total movement was seen at the end of five weeks.

Analysis of Variance↗
PubMed2000

Jaw and tooth abnormalities detected on panoramic radiographs in New Zealand children aged 10-15 years.

Panoramic radiographs of 1,608 children and adolescents aged 10 to 15 years (797 males and 811 females) were reviewed to determine the prevalence of tooth and jaw abnormalities. Abnormalities were detected on 21 percent of the radiographs (23 percent females and 17.3 percent males); 879 teeth were diagnosed with abnormalities on 331 radiographs. The more common abnormalities were malpositioned teeth, missing teeth, misshaped teeth, and teeth with hypoplastic appearance. Bony abnormalities and growth problems were detected in a few radiographs. This study demonstrates the value of panoramic radiography in detecting or confirming dental abnormalities, and supports recommendations on the use of panoramic radiography to aid in the assessment of dental development.

Adolescent↗
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↗