RGD Reference Report - The effects of systemic stress on orthodontic tooth movement. - Rat Genome Database

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The effects of systemic stress on orthodontic tooth movement.

Authors: Gameiro, GH  Nouer, DF  Pereira-Neto, JS  Urtado, MB  Novaes, PD  De Castro, M  Veiga, MC 
Citation: Gameiro GH, etal., Aust Orthod J. 2008 Nov;24(2):121-8.
RGD ID: 2315906
Pubmed: PMID:19113077   (View Abstract at PubMed)

OBJECTIVES: To determine if systemic stress affects the biological reactions occurring during orthodontic tooth movement. METHODS: Four groups of male 10 week-old Wistar rats were used. Group A animals (N=10) were restrained for one hour per day for 40 days; Group B animals (N=10) were restrained for one hour per day for three days; Group C (N=10) and Group D (N=8) animals were unrestrained. The upper left first molars in the rats in Groups A (long-term stress), B (short-term stress) and C (control) were moved mesially during the last 14 days of the experiment. The animals in Group D (N=8) were used for body weight and hormonal dosage comparisons only. They were not subjected to any stress and did not have appliances fitted. All animals were killed at 18 weeks of age and blood collected for measurement of plasma corticosterone. Tooth movement was measured with an electronic caliper. The right and left hemi-maxillae of five rats from each group were removed and the number of tartrate-resistant acid phosphatase (TRAP) positive cells, defined as osteoclasts, adjacent to the mesial roots of the upper first molars counted. The contralateral side in each animal served as the control (split-mouth design). RESULTS: Corticosterone levels were significantly higher in the stressed groups (Groups A and B) than in the control group (Group C). Tooth movement was significantly greater in Group A (long-term stress) compared with Group B (short-term stress) and Group C (control), which did not differ from each other. There were significantly more osteoclasts in the long-term stress group than in the short-term stress and control groups. CONCLUSION: Persistent systemic stress increases bone resorption during orthodontic tooth movement. Systemic stress may affect the rate of tooth movement during orthodontic treatment.

Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
multicellular organismal response to stress  IEP 2315906restraintRGD 

Objects Annotated

Genes (Rattus norvegicus)
Acp5  (acid phosphatase 5, tartrate resistant)


Additional Information