Talon cusp most common in:
a- Max. Lateral incisor ***
B- mand. Incisor.
C- max. Incisor.
The maxillary lateral incisor is the tooth of all paradoxes. Fatally overshadowed by its prestigious neighbor, anatomy accuracy is often confined to give a succinct comparative description to the central incisor.
Relegated to the rank of pale copy with reduced dimensions of the latter, one would be entitled to think that the lateral incisor is only little treated in the dental literature. Paradoxically, it is quite different! And for good reason, rarely a tooth has been so much at the heart of multidisciplinary synergy. Orthodontics, direct, indirect adhesive restoration, prosthesis, endodontic treatment, implant surgery, autotransplantation ... the restoration and / or the replacement of the lateral incisor is the seat of a real therapeutic range where decisions of antagonistic treatments or contrary, combined. The reason for such a swarm of methods forcing the practitioner to test his clinical thinking comes from the many potential morphological variations of this tooth.
Of variable silhouette, it can take extreme forms almost pathological tapered (microdontic), anatomical entities precursors of endo-periodontal pathologies (groove palato-radicular) or be completely forgotten by the Creator and be absent within the oral cavity (agenesis).
The aim of this article is to expose the various biomorphological parameters desired in terms of function and aesthetics to guide the dentist in his quest to reproduce the natural model during corrections of frequent anomalies of the maxillary lateral incisor.
Is the lateral incisor simply a small central incisor?
Confusion reigns when it comes to accurately describing the lateral incisor. Although all too often described as a central incisor with smaller dimensions, the descriptive shortcuts here are far too simplistic. Indeed, the lateral incisor functionally completing the central incisor, so it logically shares a set of morphological characters. However, it also differs in many aspects: in addition to its slimmer dimensions, the lateral incisor has more marked details.
With the exception of the wisdom tooth, it is the tooth whose anatomical variations are the most heterogeneous.
Many morphologies are thus found in the natural state (ovoid, square); the transition lines of the proximal edges can converge, making the lateral incisor more or less cuneiform to the extreme, in tapered tip (commonly called "rice-shaped", we find this form of dwarfism in the Anglo-Saxon literature under the term "peg-shaped lateral incisor").
The vestibular surface:
As stated earlier, this tooth can show considerable variability in its coronal morphology. Its reduced mesiodistal width visually gives a greasy tooth sensation. Classically, contours of the vestibular surface in their entirety are more rounded than the central incisor with strongly rounded incisal angles (in particular the distal angle which presents a very marked curvature). This results in a shorter distal proximal edge relative to the mesial angle, reinforcing the obliquity of its free edge. The vestibular surface, slightly more convex than the central incisor, is covered...
The maxillary lateral incisor is the tooth of all paradoxes. Fatally overshadowed by its prestigious neighbor, anatomy accuracy is often confined to give a succinct comparative description to the central incisor.
Relegated to the rank of pale copy with reduced dimensions of the latter, one would be entitled to think that the lateral incisor is only little treated in the dental literature. Paradoxically, it is quite different! And for good reason, rarely a tooth has been so much at the heart of multidisciplinary synergy. Orthodontics, direct, indirect adhesive restoration, prosthesis, endodontic treatment, implant surgery, autotransplantation ... the restoration and / or the replacement of the lateral incisor is the seat of a real therapeutic range where decisions of antagonistic treatments or contrary, combined. The reason for such a swarm of methods forcing the practitioner to test his clinical thinking comes from the many potential morphological variations of this tooth.
Of variable silhouette, it can take extreme forms almost pathological tapered (microdontic), anatomical entities precursors of endo-periodontal pathologies (groove palato-radicular) or be completely forgotten by the Creator and be absent within the oral cavity (agenesis).
The aim of this article is to expose the various biomorphological parameters desired in terms of function and aesthetics to guide the dentist in his quest to reproduce the natural model during corrections of frequent anomalies of the maxillary lateral incisor.
Is the lateral incisor simply a small central incisor?
Confusion reigns when it comes to accurately describing the lateral incisor. Although all too often described as a central incisor with smaller dimensions, the descriptive shortcuts here are far too simplistic. Indeed, the lateral incisor functionally completing the central incisor, so it logically shares a set of morphological characters. However, it also differs in many aspects: in addition to its slimmer dimensions, the lateral incisor has more marked details.
With the exception of the wisdom tooth, it is the tooth whose anatomical variations are the most heterogeneous.
Many morphologies are thus found in the natural state (ovoid, square); the transition lines of the proximal edges can converge, making the lateral incisor more or less cuneiform to the extreme, in tapered tip (commonly called "rice-shaped", we find this form of dwarfism in the Anglo-Saxon literature under the term "peg-shaped lateral incisor").
The vestibular surface:
As stated earlier, this tooth can show considerable variability in its coronal morphology. Its reduced mesiodistal width visually gives a greasy tooth sensation. Classically, contours of the vestibular surface in their entirety are more rounded than the central incisor with strongly rounded incisal angles (in particular the distal angle which presents a very marked curvature). This results in a shorter distal proximal edge relative to the mesial angle, reinforcing the obliquity of its free edge. The vestibular surface, slightly more convex than the central incisor, is covered...
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