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The canine space, or infraorbital space, is a paired compartment in the soft tissues of the face, overlying the maxilla near the canine tooth root and covered by the levator labii superioris muscle.
The canine space contains fat and branches of the infraorbital nerve.
The canine space has the following boundaries:
- anteriorly: levator labii superioris muscle 1
- posteriorly: levator anguli oris muscle 1 or maxilla
- medially: levator labii superioris alaeque nasi muscle 2
- laterally: levator anguli oris muscle 2
- superiorly: origin of the levator labii superior muscle 2
- inferiorly: orbicularis oris muscle 2
Periapical infection from the canine that perforates the buccal cortex will spread into the canine space.
- 1. Patel J, Le R, Haymes D et al. Imaging of Dental Infections. Emerg Radiol. 2021;29(1):197-205. doi:10.1007/s10140-021-01982-7 - Pubmed
- 2. Hu K, Kwak H, Song W et al. Branching Patterns of the Infraorbital Nerve and Topography Within the Infraorbital Space. J Craniofac Surg. 2006;17(6):1111-5. doi:10.1097/01.scs.0000236436.97720.5f - Pubmed