Dental Anatomy_ Canines.pdf

Dental Anatomy: Canines Maxillary Incisors First evidence of calcification Max Canine 3-4 mon Except max lat incisors: 10-12 mon Last to erupt Crown completion Eruption Mandibular Incisors First to erupt: mand cen incisors 4-5 mon Max canine is the last to erupt and complete root dev, among an...

Dental Anatomy: Canines Maxillary Incisors First evidence of calcification Max Canine 3-4 mon Except max lat incisors: 10-12 mon Last to erupt Crown completion Eruption Mandibular Incisors First to erupt: mand cen incisors 4-5 mon Max canine is the last to erupt and complete root dev, among ant. teeth 4-5 yrs Central: 7-8 yrs Central: 6-7 yrs Lateral: 8-9 yrs Lateral: 7-8 yrs Avg 2 yrs after eruption - 6-7 yrs 10-12 yrs Root Completion Mand Canine 9-10 yrs Avg 3 yrs after eruption Eruption Sequence Mand cen incisor → max cen incisor → mand lat incisor → max lat incisor → mand canine → premolars → max canine Proximal Contacts for Canines The facial cusp, with mesial and distal slopes, has pronounced incisal embrasures unique for both max and mand canines Crown Outline Form HOC Facial and Lingual HOCs of max and mand canines: Cervical ⅓ MAX CANINE Facial - Crown: Inciso-cervical greater than mesial-distal - Cusp tip centered - Prominent middle lobe - Dev depression runs along mesial-facial line angle - Mesial-incisal slope shorter than distal-incisal - Distal surface: convex at the middle ⅓ and concave at cervical ⅓ - Mesial surface: overhangs above root - Root tip: generally tips distally Mesial - Root is larger facial-lingually than mesial distally (wide) - Mesial curve significantly greater than distal curve - Mesio-distally wider than other anteriors Distal - Distal root depression larger than mesial’s - Deep distal concavity at cervical ⅓ of crown - Prominent facial convexity Lingual View - Mesial marginal ridge: longer - Distal marginal ridge: shorter, more elevated and prominent - Sometimes a lingual ridge - extends from cingulum to cusp tip - Pronounced cingulum Incisal - Distal side looks more wider, stretched, more posterior tooth-like - Typically wider facial-lingually than mesio-distally Mand Canine Facial - Mesial-incisal edge: angled Distal-incisal edge: rounded Mesial surface: straight Distal surface: convex, overhang Distal-incisal slope: curved steeper and longer than mesial-incisal slope (sharp, shorter slope, shorter) Cusp tip: centered Narrower mesio-distally than max canine Longest perm tooth in mouth - Largest crown among anterior teeth Mesial - Cusp tip and incisal edge factors lingual side - Cervical curve larger than distal curve - Flat facial surface of crown - Root may bifurcate Distal - Larger root depression than mesial’s Lingual - Less distinct landmarks Incisal - Cingulum slightly distal - Mesial-facial line: convex - Distal-facial line: slight concave All canines - For both Maxillary and Mandibular canines, the location of the mesial proximal contacts is closer to the incisal edge than the distal side Anterior teeth Maxillary - Facial View: - Crown (mesial-distal dimension): lateral incisor < canine < central incisor - Crown (inciso-cervical dimension): lateral incisor < canine < central incisor Mandibular - Facial View: - Crown (mesial-distal dimension): lateral incisor & central incisor < canine - Crown (inciso-cervical dimension): lateral incisor & central incisor < canine - Mesial View: - Facial-lingual root and crown dimension are greater on canines - Lingual View: - Canines have larger, prominent cingulum compared to central and lat incisors - Lingual surface less concave for canines