Document Detail

Location of proliferating gingival cells following toothbrushing stimulation.
MedLine Citation:
PMID:  17241434     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: Mechanical stimulation by toothbrushing promotes healing of gingivitis through accelerating cell proliferation. Junctional epithelium proliferates at periodontal pocket formation. A question is arisen whether toothbrushing contributes to the repair of gingival inflammation or deterioration of pocket formation. The location of proliferating cells in gingiva stimulated mechanically by toothbrushing was investigated. MATERIALS AND METHODS: A total of 24 teeth of dogs underwent daily plaque removal with a curette (plaque removal) or both plaque removal and toothbrushing (toothbrushing). Proliferative activity of gingival cells in six individual zones was evaluated by assaying expression of proliferating cell nuclear antigen (PCNA). RESULTS: Toothbrushing increased densities of PCNA-positive basal cells in the junctional epithelium, connective tissues adjacent to the junctional epithelium, the alveolar bone of the oral epithelial side and the oral epithelium. However, the densities of PCNA-positive cells at the apical portion of the junctional epithelium, connective tissues adjacent to the cementum and the alveolar bone of the periodontal ligament side did not increase following toothbrushing. CONCLUSIONS: Toothbrushing promotes proliferation of gingival cells other than fibroblasts in periodontium and basal cells in the apical portion of the junctional epithelium. The repair of periodontal tissues might be promoted by toothbrushing within the limit of the direct mechanical stimulation.
T Tomofuji; T Sakamoto; D Ekuni; T Yamamoto; T Watanabe
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Oral diseases     Volume:  13     ISSN:  1354-523X     ISO Abbreviation:  Oral Dis     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2007-01-23     Completed Date:  2007-03-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9508565     Medline TA:  Oral Dis     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  77-81     Citation Subset:  D    
Department of Oral Health, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
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MeSH Terms
Alveolar Process / cytology
Cell Count
Cell Proliferation
Connective Tissue Cells / physiology
Curettage / instrumentation
Dental Cementum / cytology
Dental Plaque / therapy
Dental Scaling / instrumentation
Epithelial Attachment / cytology
Epithelial Cells / physiology
Fibroblasts / cytology
Gingiva / cytology*
Physical Stimulation
Proliferating Cell Nuclear Antigen / analysis
Reg. No./Substance:
0/Proliferating Cell Nuclear Antigen

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