Document Detail

In vitro effects of an acidic by-product feed on bovine teeth.
MedLine Citation:
PMID:  9140558     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To evaluate in vitro erosive effects of sweet potato cannery waste (SPCW) on bovine incisor enamel. SAMPLE POPULATION: 20 bovine mandibles. PROCEDURE: Mandibles were collected and incisors were classified into 3 categories: lacking observable wear, advanced normal wear, or abnormal wear associated with feeding SPCW. Intact mandibles were radiographed. Contralateral normal teeth from the same jaw were used to compare Ca2+ loss (etching) with SPCW, lactic acid (pH 3.2), or SPCW neutralized with NaOH to pH 5.0 or 5.5. Scanning electron microscopy was performed to compare etched and unetched specimens. Two abnormally worn teeth were evaluated histologically. Knoop hardness testing was conducted on unexposed areas of surface enamel and enamel exposed to SPCW. RESULTS: Radiography revealed large periapical abscesses in the mandibles exposed to SPCW. Nearly identical amounts of Ca2+ were removed by SPCW and lactic acid solution at the same pH. Scanning electron microscopy did not indicate consistent differences between etch patterns resulting from exposure to SPCW or lactic acid. Mean rate of calcium removal was 56% higher in deciduous than permanent teeth. Knoop hardness data suggested that softening occurred in enamel exposed to SPCW. Neutralizing SPCW to pH 5.5 eliminated calcium removal. Histologic examination of sections indicated that SPCW degraded and removed some dentin matrix proteins. CONCLUSIONS: Exposure to SPCW results in enamel erosion in vitro; low pH is the most likely cause of erosion. Neutralizing SPCW to pH 5.5 eliminated erosive effects. CLINICAL RELEVANCE: Confirmation of SPCW's erosive effects on enamel in vitro supported the field diagnosis.
G M Rogers; M H Poore; B L Ferko; R P Kusy; T G Deaton; J W Bawden
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of veterinary research     Volume:  58     ISSN:  0002-9645     ISO Abbreviation:  Am. J. Vet. Res.     Publication Date:  1997 May 
Date Detail:
Created Date:  1997-07-24     Completed Date:  1997-07-24     Revised Date:  2006-04-06    
Medline Journal Info:
Nlm Unique ID:  0375011     Medline TA:  Am J Vet Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  498-503     Citation Subset:  IM    
Department of Food Animal and Equine Medicine, North Carolina State University, Raleigh 27606, USA.
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MeSH Terms
Animal Feed / adverse effects*
Calcium / analysis,  metabolism
Cattle Diseases / diagnosis,  etiology*,  pathology
Dental Enamel / chemistry,  metabolism,  ultrastructure
Incisor / pathology*,  radiography,  ultrastructure
Microscopy, Electron, Scanning / methods,  veterinary
Risk Factors
Tooth Erosion / diagnosis,  etiology,  veterinary*
Waste Products / adverse effects*
Reg. No./Substance:
0/Waste Products; 7440-70-2/Calcium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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