• DVM360_Conference_Charlotte,NC_banner
  • ACVCACVC
  • DVM 360
  • Fetch DVM 360Fetch DVM 360
DVM 360
dvm360 | Veterinary News, Veterinarian Insights, Medicine, Pet Care
dvm360 | Veterinary News, Veterinarian Insights, Medicine, Pet Care
By Role
AssociatesOwnersPractice ManagerStudentsTechnicians
Subscriptions
dvm360 Newsletterdvm360 Magazine
News
All News
Association
Breaking News
Conference Coverage
Education
Equine
FDA
Law & Ethics
Market Trends
Medical
Politics
Products
Recalls
Regulatory
Digital Media
dvm360 LIVE!™
Expert Interviews
The Vet Blast Podcast
Medical World News
Pet Connections
The Dilemma Live
Vet Perspectives™
Weekly Newscast
dvm360 Insights™
Publications
All Publications
dvm360
Firstline
Supplements
Top Recommended Veterinary Products
Vetted
Clinical
All Clinical
Anesthesia
Animal Welfare
Behavior
Cardiology
CBD in Pets
Dentistry
Dermatology
Diabetes
Emergency & Critical Care
Endocrinology
Equine Medicine
Exotic Animal Medicine
Feline Medicine
Gastroenterology
Imaging
Infectious Diseases
Integrative Medicine
Nutrition
Oncology
Ophthalmology
Orthopedics
Pain Management
Parasitology
Pharmacy
Surgery
Toxicology
Urology & Nephrology
Virtual Care
Business
All Business
Business & Personal Finance
Hospital Design
Personnel Management
Practice Finances
Practice Operations
Wellbeing & Lifestyle
Continuing Education
Conferences
Conference Listing
Conference Proceedings
Resources
CBD in Pets
CE Requirements by State
Contests
Veterinary Heroes
Partners
Spotlight Series
Team Meeting in a Box
Toolkit
Top Recommended Veterinary Products
Vet to Vet
  • Contact Us
  • Fetch DVM360 Conference
  • Terms and Conditions
  • Privacy
  • Do Not Sell My Information
  • About Us

© 2023 MJH Life Sciences and dvm360 | Veterinary News, Veterinarian Insights, Medicine, Pet Care. All rights reserved.

Advertisement
By Role
  • Associates
  • Owners
  • Practice Manager
  • Students
  • Technicians
Subscriptions
  • dvm360 Newsletter
  • dvm360 Magazine
  • Contact Us
  • Fetch DVM360 Conference
  • Terms and Conditions
  • Privacy
  • Do Not Sell My Information
  • About Us
  • MJHLS Brand Logo

© 2023 MJH Life Sciences™ and dvm360 | Veterinary News, Veterinarian Insights, Medicine, Pet Care. All rights reserved.

Fluorescent Imaging Technique Reliably Measures Dental Plaque in Cats

April 23, 2017
JoAnna Pendergrass, DVM

Quantitative Light-induced Fluorescence is an imaging technique that reliably detects dental plaque coverage in adult domestic short-haired cats.

Researchers in the United Kingdom demonstrated the reliability of Quantitative Light-induced Fluorescence (QLF) in detecting dental plaque coverage in adult domestic short-haired cats. Results of the study were published recently in Research in Veterinary Science.

Periodontal disease is a common dental condition in pets. It is caused by prolonged plaque accumulation, which can lead to gingivitis and eventual bone loss. The reported incidence of feline periodontal disease—3% to 24%—is likely much lower than the true incidence due to challenges in detecting and diagnosing this condition. Because compliance with regular tooth brushing is low for cats, dental diets are often recommended for reducing feline dental plaque accumulation.

Current plaque measurement methods, such as the modified Logan and Boyce technique (mLB), involve applying a stain to the teeth and rating plaque coverage using an ordinal scale; these methods are subjective. In contrast, planimetric methods, which use imaging and computational analysis, provide objective plaque measurements. QLF imaging is a planimetric method that uses the natural fluorescence of plaque and enamel to measure plaque coverage.

Study Methods

Using a crossover design, researchers measured dental plaque in 24 adult cats. Following a professional dental cleaning, cats ate a control or dental diet for 4 weeks; plaque coverage was then measured using the QLF and mLB techniques. After a second dental cleaning, cats were switched to the other diet and plaque coverage was measured again. The buccal crown surface of 14 teeth were evaluated:

  • Mandibular first molars
Advertisement
  • Maxillary and mandibular canines
  • Maxillary and mandibular third and fourth premolars

For QLF imaging, researchers captured images before and after applying a disclosing stain to the teeth; a software program then automatically calculated plaque coverage percentage. For the mLB technique, ordinal scales were used to rate plaque coverage and thickness following stain application.

The researchers used QLF images from 12 cats each to evaluate intra-operator repeatability (images taken by 1 individual) and inter-operator reproducibility (images taken by 3 individuals). Efficacy of each technique was also evaluated.

Results

The QLF technique demonstrated a markedly lower detection of undisclosed plaque (before stain application) than disclosed plaque (after stain application). Only disclosed plaque coverage was used for further testing.

Repeatability and Reproducibility

For repeatability and reproducibility testing, mean plaque coverage ranged from 13% to 87%, with mandibular canines having the least plaque coverage. When averaging the percentages of plaque coverage, variability was low (<1% to 3%), indicating excellent repeatability and reproducibility. Importantly, variability was low even when plaque coverage percentages were adjusted for tooth size.

Product Efficacy

Researchers investigated the effect of diet on plaque reduction. For both measurement techniques, plaque accumulation was reduced by about 14% when cats ate the dental diet; this finding indicated the significant effect of diet on plaque reduction and demonstrated a good level of agreement between the two techniques.

Researchers also performed a retrospective analysis to determine how many cats would be needed to detect a 15% plaque reduction with at least 90% power for each technique. Power analyses indicated that the QLF technique would require only 9 to 10 cats, while the mLB technique would require at least 30 cats. The authors noted that requiring so few animals for testing efficacy is an advantage for the QLF technique and aligns with the 3 R’s of humane animal research (replace, reduce, refine).

Conclusion

Taken together, these study results suggest that the QLF imaging technique is “a [statistically] sensitive, repeatable, and reproducible method for the detection and measurement of dental plaque in cats,” the authors wrote.

Dr. JoAnna Pendergrass received her Doctor of Veterinary Medicine degree from the Virginia-Maryland College of Veterinary Medicine. Following veterinary school, she completed a postdoctoral fellowship at Emory University’s Yerkes National Primate Research Center. Dr. Pendergrass is the founder and owner of JPen Communications, a medical communications company.


Advertisement

Latest News

To refer or not to refer

Advice panel for women interested in the veterinary field

AVMA president set to testify before Congress

New Hawaii-based pet CBD brand launches

View More Latest News
Advertisement