Abstract
The aim of this study was to evaluate the impact of the nasopalatine canal (NPC) shape and its morphometric characteristics on expected teeth movement by assessing the distance to maxillary central incisors (MCIs) according to NPC type. The retrospective study was performed on 133 CBCT images. The following parameters were obtained: the antero-posterior diameter (A-P) of the nasal foramen (NF), canal length, A-P and mediolateral diameter (M-L) of the incisive foramen (IF), and the distance between NPC and MCIs. With the exception of being hourglass-shaped, each NPC shape showed specific impacts of NPC shape on the relationship between NPC diameters at different sections and distances to MCIs. In banana-shaped NPC, a significant correlation was observed for A-P NF diameter, while in cylindrical-shaped NPC, a significant correlation was observed for NPC length. The increase in M-L IF, A-P IF, A-P NF, and NPC length in funnel-shaped NPC may be a risk factor for interventions that could result in teeth movement. According to the results, it seems that the proposed methodological approach for analysis of CBCT slices in the anterior maxilla may offer detailed information that could be an additional tool in planning the procedures that result in expected teeth movement.
Highlights
The premaxilla, known as the incisive bone, may have abnormal growth that could be accompanied by various malformations such as prognathism, deep bite, and protrusion [1]
Antero-posterior diameter of the nasal foramen (Figure 4A) was significantly lower in funnel nasopalatine canal (NPC) type when compared to the hourglass (p < 0.05) and cylindrical (p < 0.01)
Medio-lateral diameter of the incisive foramen (Figure 4B) was significantly extended in the banana type when compared to the cylindrical NPC type (p < 0.05)
Summary
The premaxilla, known as the incisive bone, may have abnormal growth that could be accompanied by various malformations such as prognathism, deep bite, and protrusion [1]. The upper anterior teeth are part of the premaxilla and contribute to esthetics and to physiological functions that include phonetics and mastication [2,3,4]. Maxillary incisor protrusion is considered to be one of the most frequent dental deformities [5]. There are various therapeutic approaches in the treatment of this malocclusion type [6,7,8,9]. The interventions that involve teeth movement must take into account the relations to other structures located in the region of the anterior maxilla, such as the nasopalatine canal (NPC)
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