Mehak Mahant - PhD Candidate, Department of Veterinary Surgery and Radiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India
Arun Anand - Department of Veterinary Surgery and Radiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India
Vandana Sangwan - Department of Veterinary Surgery and Radiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India
Jitender Mohindroo - 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, ۵۰ dogs with the age from ۵ to ۱۵۶ months and body weight from ۶.۰۰ to ۴۵.۰۰ 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 ۱ (۰ - ۱۲ months) in comparison with group ۲ (۱۳ - ۶۰ months) and group ۳ (> ۶۰ months). A significant decrease in least square count means of dental parameters was observed in group A (۰.۰۰ - ۱۰.۰۰ kg) in comparison with group B (۱۱.۰۰ - ۲۵.۰۰ kg) and group C (> ۲۵.۰۰ 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/M۱H) 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.

crown, Dental parameters, Dentistry, Radiography, root