Analysis of the dentin-pulp complex in teeth submitted to orthodontic movement in rats
J. appl. oral sci
;
17(spe): 35-42, 2009. ilus, tab
Article
in English
| LILACS
| ID: lil-576875
ABSTRACT
In order to microscopically analyze the pulpal effects of orthodontic movement, 49 maxillary first molars of rats were submitted to orthodontic appliance composed of a closed coil spring anchored to the maxillary incisors, placed for the achievement of mesial movement. MATERIAL AND METHODS:
Ten animals were used as the control group and were not submitted to orthodontic force; the other animals were divided into groups according to the study period of tooth movement, namely 1, 2, 3, 4, 5, 6 and 7 days. The investigation of pulp and periodontal changes included hyalinization, fibrosis, reactive dentin and vascular congestion. Statistical evaluation was performed between control and experimental groups and between periods of observation using non-parametric chi-square, Kruskal-Wallis and Dunn tests.RESULTS:
There was no statistically significant difference concerning pulpal changes between control and experimental groups nor between periods of observation. The control group, at 3 and 5 days, revealed greater hyalinization of the periodontal ligament (p<0.05), whereas root resorption was significantly greater at 5 and 7 days (p<0.05).CONCLUSION:
No morphological change from the effect of induced tooth movement could be found in the dentin-pulp complex. In addition, no inflammatory or pulp degeneration, detectable in optical microscopy, was found in experimental groups.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Orthodontic Appliances
/
Tooth Movement Techniques
/
Dental Pulp
/
Dentin
Type of study:
Etiology study
/
Prognostic study
Limits:
Animals
Language:
English
Journal:
J. appl. oral sci
Journal subject:
Dentistry
Year:
2009
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
University of Sacred Heart/BR
/
University of São Paulo/BR
Similar
MEDLINE
...
LILACS
LIS