This retrospective study assessed maxillary premolar and molar teeth and identified roots with incomplete apical bone coverage using cone beam computed tomography in 161 dogs. The associated dorsal anatomic sites that the roots communicated with were the ventral nasal meatus, maxillary recess, infraorbital canal, and pterygopalatine fossa. The study found that all roots of the maxillary premolar and molar teeth have the potential for incomplete apical bone coverage, with 26.7% having incomplete apical bone coverage. No significant association with sex was found. A significant association with weight was found, and this lowered with increasing body weight. Facial index, as a determinate of skull shape, was found to be significant in only 35.7% of roots in univariate and 14.2% of roots in multivariate modeling. Knowledge of the anatomy of these roots plays an important role in safe and effective extraction techniques, in reducing iatrogenic trauma, and in understanding the potential local effects of periodontal and endodontic disease.
HermansonJde LahuntaAEvansH. The skeleton. In: HermansonJde LahuntaAEvansH, eds. Miller’s Anatomy of the Dog. 5th ed.Elsevier Saunders; 2019:193–259.
2.
GeorgevskyDCarrascoJValenzuelaMMcGreevyP. Domestic dog skull diversity across breeds, breed groupings, and genetic clusters. J Vet Behav. 2017;9(5):228–234.
3.
LittlesMRaoSBannonK. Analysis of the anatomic relationship of the infraorbital canal with the roots of the maxillary fourth premolar tooth in the three different skull types: mesocephalic, brachycephalic, and dolichocephalic, using cone beam computed tomography. Front Vet Sci. 2022;9:978400.
4.
GeigerMGendronKWillmitzerFSánchez-VillagraM. Unaltered sequence of dental, skeletal, and sexual maturity in domestic dogs compared to the wolf. Zoological Lett. 2016;2(1):16.
ForsbergCEliassonSWestergrenH. Face height and tooth eruption in adults—A 20-year follow-up investigation. Eur J Orthod. 1991;13(4):249–254.
7.
PeraltaSVerstraeteFKassP. Radiographic evaluation of the types of tooth resorption in dogs. Am J Vet Res. 2010;71(7):784–793.
8.
StockardC. The Genetic and Endocrinic Basis for Differences in Form and Behavior: As Elucidated by Studies of Contrasted Pure-line Dog Breeds and Their Hybrids. Wistar Institute of Anatomy and Biology; 1941:207–224.
9.
GreeneERendahlAGoldschmidtS. The anatomical relationship between the mandibular first molar roots and the mandibular canal based on breed size and skull type. Front Vet Sci. 2022;9:956976.
10.
BerningJSnyderCHetzelSSarmentD. Analysis of the anatomic relationship between the mandibular first molar roots and mandibular canal using cone-beam computed-tomography in 101 dogs. Front Vet Sci. 2020;6:485.
11.
SeigneurMCloitreAMOLesclousP. Teeth roots displacement in the maxillary sinus: characteristics and management. J Oral Med Oral Surg. 2020;26(3):1-9.
12.
TaylorTSmithMSnyderL. Nasal displacement of a tooth root in a dog. J Vet Dent. 2004;21(4):222–225.
13.
MarrettaS. Chronic rhinitis and dental disease. Vet Clin North Am Small Anim Pract. 1992;22(5):1101–1117.
14.
RamseyDMarrettaSHamorR, et al.Ophthalmic manifestations and complications of dental disease in dogs and cats. J Am Anim Hosp Assoc. 1996;32(3):215–224.
15.
AdamsPHalfacreeZLambCSmithKBainesS. Zygomatic salivary mucocoele in a Lhasa apso following maxillary tooth extraction. Vet Rec. 2011;168(17):458.
16.
SmithMSmithELa CroixNMouldJ. Orbital penetration associated with tooth extraction. J Vet Dent. 2003;20(1):8–17.
17.
VolkHBayleyKFianiNBillsonF. Ophthalmic complications following ocular penetration during routine dentistry in 13 cats. N Z Vet J. 2019;67(1):46–51.
18.
DukeFSnyderCBentleyEDubielzigR. Ocular trauma originating from within the oral cavity: clinical relevance and histologic findings in 10 cases (2003-2013). J Vet Dent. 2014;31(4):245–248.
19.
GuerreiroCAppelboamHLoweR. Successful medical treatment for globe penetration following tooth extraction in a dog. Vet Ophthalmol. 2014;17(2):146–149.
20.
DeBowesL. Simple and surgical exodontia. Vet Clin North Am Small Anim Pract. 2005;35(4):963–984.
21.
GenglerB. Exodontics: extraction of teeth in the dog and cat. Vet Clin North Am Small Anim Pract. 2013;43(3):573–585.
22.
EktefaieMDavidHPohC. Surgical resolution of chronic tissue irritation caused by extruded endodontic filling material. J Can Dent Assoc. 2005;71(7):487–490.
23.
BrooksJKleinmanJ. Retrieval of extensive gutta-percha extruded into the maxillary sinus: use of 3-dimensional cone-beam computed tomography. J Endod. 2013;39(9):1189–1193.
24.
Souza-NunesLVernerFRosadoLAquinoSCarvalhoAJunqueiraR. Periapical and Endodontic Status Scale for endodontically treated teeth and their association with maxillary sinus abnormalities: a cone-beam computed tomographic study. J Endod. 2019;45(12):1479–1488.
25.
LegertKMelénIHeimdahlAStiernaP. Development and characterization of an animal model of dental sinusitis. Acta Otolaryngol. 2005;125(11):1195–1202.
26.
StepaniukKGingerichW. Suspect odontogenic infection etiology for canine lymphoplasmacytic rhinitis. J Vet Dent. 2015;32(1):22–29.
27.
Goller-BulutDSekerciAKöseESismanY. Cone beam computed tomographic analysis of maxillary premolars and molars to detect the relationship between periapical and marginal bone loss and mucosal thickness of maxillary sinus. Med Oral Patol Oral Cir Bucal. 2015;20(5):e572–e579.
