Document Type : Original Article
PhD Candidate, Department of Veterinary Surgery and Radiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India
Department of Veterinary Surgery and Radiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India
The aim of this study was to investigate the relationship of different radiographic parameters of mandibular first molar with respect to age, body weight and breed in healthy dogs. Overall, 50 dogs with the age from 5 to 156 months and body weight from 6.00 to 45.00 kg of various breeds were made the subject of study. Animals were categorized into different groups based on age, body weight and breed. A new dental parameters measurement technique was standardised which was in line with modified Lind’s measurement technique of human dentistry. A significant decrease in least square count means of dental parameters was observed in age group 1 (0 - 12 months) in comparison with group 2 (13 - 60 months) and group 3 (> 60 months). A significant decrease in least square count means of dental parameters was observed in group A (0.00 - 10.00 kg) in comparison with group B (11.00 - 25.00 kg) and group C (> 25.00 kg). The root canal width showed a significant decrease with an increase in age; therefore, it was difficult to approach pulp cavity in older dogs. Small breeds showed decline in root length/crown height (R/C) ratio and mandible height/first mandibular molar height (MH/M1H) ratio in comparison with medium and large breeds because of which there were more chances of tooth loosening in smaller breeds. Regression equations formulated with respect to body weight and age can act as a ready reference to calculate values of different dental parameters at places where dental radiography is not available.
- Jayawardena CK, Abesundara AP, Nanayakkara DC, et al. Age-related changes in crown and root length in Sri Lankan Sinhalese. J Oral Sci 2009; 51(4): 587-592.
- Yun HJ, Jeong JS, Pang NS, et al. Radiographic assessment of clinical root-crown ratios of permanent teeth in a healthy Korean population. J Adv Prosthodont 2014; 6(3): 171-176.
- Gioso MA, Shofer F, Barros PS, et al. Mandible and mandibular first molar tooth measurements in dogs: relationship of radiographic height to body weight. J Vet Dent 2001; 18(2): 65-68.
- Van den Broeck M, Stock E, Vermeiren Y, et al. Age estimation in young dogs by radiographic assessment of the canine pulp cavity/tooth width ratio. Anat Histol Embryol 2022; 51(2): 269-279.
- Kung A, Lam AK, Lay NF, et al. Evaluation of the selected root-to-crown ratio of crowned teeth in a hospital setting: a cross-sectional study. J Adv Med 2016; 18(12): 1-8.
- Subramaniam P, Naidu P. Mandibular dimensional changes and skeletal maturity. Contemp Clin Dent 2010; 1(4): 218-222.
- De Rossi SS, Slaughter YA. Oral changes in older patients: a clinician's guide. Quintessence Int 2007; 38(9): 773-780.
- Knowlton FF, Whittemore SL. Pulp cavity-tooth width ratios from known-age and wild-caught coyotes determined by radiography. Wildl Soc Bull 2001; 29(1): 239-244.
- Raghavendra N, Somayaji NR, Kamath VV. The correlation between permanent maxillary central incisor crown length, facial height and body height and weight. An allometric analysis of 100 individuals. ResRev J Dent Sci (RRJDS) 2014; 2(2): 127-131.
- Ranjan R, Zahid UN, Gupta DK, et al. An epidemiological study on periodontal diseases in dogs - a clinical study of 103 canine patients. Intas Polivet 2010; 11(2): 274-277.