Association between the occurrence of buccally displaced canine and palatal and craniofacial morphology in adolescents

The main objective of the present research study is to evaluate the association between the occurrence of buccally displaced canine (BDC) and the palatal as well as the craniofacial morphology in adolescents in accordance at the early permanent dentition. As the experimental group, 100 adolescents of Chinese ethnicity (mean age 13.05 years) with crowding and buccally displaced canine (BDC-c) were selected in comparison with the same number of candidates (mean age 12.59 years) without BDC and crowding as control group. Digital dental casts and cephalograms were collected for three dimensional (3D) and cephalometric measurements. An independent sample T-test was used to compare the cephalometric values between the two groups. Logistic regression as commonly statistical methods used in empirical study including categorical dependent variables was used to identify the joint effects of the dental variables’ 3D measurements. When comparing the groups with above analysis, patients with BDC showed a statistically significant narrower and higher palatal vault. For the cephalometric variables, the anterior cranial base length, sagittal position of the maxilla (SNA), sagittal position of the mandible (SNB), and skeletal relationship between maxilla and mandible (ANB) appeared to be smaller, whilst palatal plane angle (SN-PP), Frankfort-mandibular plane angle (FMA), anterior facial height, and lower facial height were larger in BDC-c control group (p < 0.05). A smaller inter-first premolar width was significant in the prediction model (p = 0.002). This study highlights that BDC-c participants in early permanent dentition exhibited a narrower dental arch and higher palatal vault, of which a smaller inter-first premolar width would significantly increase the occurrence of BDC.

Cephalometry; Cuspid; Ectopic eruption; Maxillary morphology; Three-dimensional

[1] Mucedero M, Ricchiuti MR, Cozza P, Baccetti T. Prevalence rate and dentoskeletal features associated with buccally displaced maxillary canines. The European Journal of Orthodontics. 2013; 35: 305–309.

[2] Litsas G, Acar A. A review of early displaced maxillary canines: etiology, diagnosis and interceptive treatment. The Open Dentistry Journal. 2011; 5: 39–47.

[3] Juvvadi S, Manne R, Gandikota C, Medapati Rama HR, Anche S. Impacted canines: etiology, diagnosis, and orthodontic management. Journal of Pharmacy and Bioallied Sciences. 2012; 4: S234–S238.

[4] Peck S, Peck L, Kataja M. Concomitant occurrence of canine malposition and tooth agenesis: evidence of orofacial genetic fields. American Journal of Orthodontics and Dentofacial Orthopedics. 2002; 122: 657–660.

[5] Chaushu S, Bongart M, Aksoy A, Ben-Bassat Y, Becker A. Buccal ectopia of maxillary canines with no crowding. American Journal of Orthodontics and Dentofacial Orthopedics. 2009; 136: 218–223.

[6] Schindel RH, Duffy SL. Maxillary transverse discrepancies and potentially impacted maxillary canines in mixed-dentition patients. The Angle Orthodontist. 2007; 77: 430–435.

[7] Bhujel N, Duggal M, Munyombwe T, Godson J, Day P. The effect of premature extraction of primary teeth on the subsequent need for orthodontic treatment. European Archives of Paediatric Dentistry. 2014; 15: 393–400.

[8] Radnzic D. Dental crowding and its relationship to mesiodistal crown diameters and arch dimensions. American Journal of Orthodontics and Dentofacial Orthopedics. 1988; 94: 50–56.

[9] Suri L, Gagari E, Vastardis H. Delayed tooth eruption: pathogenesis, diagnosis, and treatment. a literature review. American Journal of Orthodontics and Dentofacial Orthopedics. 2004; 126: 432–445.

[10] Mucedero M, Rozzi M, Di Fusco G, Danesi C, Cozza P. Morphometric analysis of the palatal shape and arch dimension in subjects with buccally displaced canine. European Journal of Orthodontics. 2020; 42: 544–550.

[11] Ikoma M, Arai K. Craniofacial morphology in women with class I occlusion and severe maxillary anterior crowding. American Journal of Orthodontics and Dentofacial Orthopedics. 2018; 153: 36–45.

[12] Larsen HJ, Sørensen HB, Artmann L, Christensen IJ, Kjaer I. Sagittal, vertical and transversal dimensions of the maxillary complex in patients with ectopic maxillary canines. Orthodontics & Craniofacial Research. 2010; 13: 34–39.

[13] Bizzarro M, Generali C, Maietta S, Martorelli M, Ferrillo M, Flores-Mir C, et al. Association between 3D palatal morphology and upper arch dimensions in buccally displaced maxillary canines early in mixed dentition. European Journal of Orthodontics. 2018; 40: 592–596.

[14] Primožič J, Perinetti G, Richmond S, Ovsenik M. Three-dimensional longitudinal evaluation of palatal vault changes in growing subjects. The Angle Orthodontist. 2012; 82: 632–636.

[15] Generali C, Primozic J, Richmond S, Bizzarro M, Flores-Mir C, Ovsenik M, et al. Three-dimensional evaluation of the maxillary arch and palate in unilateral cleft lip and palate subjects using digital dental casts. European Journal of Orthodontics. 2017; 39: 641–645.

[16] Seto BH. Maxillary morphology in obstructive sleep apnoea syndrome. The European Journal of Orthodontics. 2001; 23: 703–714.

[17] Nanda R, Snodell SF, Bollu P. Transverse growth of maxilla and mandible. Seminars in Orthodontics. 2012; 18: 100–117.

[18] Lione R, Buongiorno M, Franchi L, Cozza P. Evaluation of maxillary arch dimensions and palatal morphology in mouth-breathing children by using digital dental casts. International Journal of Pediatric Otorhinolaryngology. 2014; 78: 91–95.

[19] Ma W, Lozanoff S. Spatial and temporal distribution of cellular proliferation in the cranial base of normal and midfacially retrusive mice. Clinical Anatomy. 1999; 12: 315–325.

[20] Chang H, Liu P, Tseng Y, Yang Y, Pan C, Chou S. Morphometric analysis of the cranial base in Asians. Odontology. 2014; 102: 81–88.

[21] Oz U, Rubenduz M. Craniofacial differences between skeletal Class II and skeletal Class I malocclusions according to vertical classification. International Journal of Stomatology & Occlusion Medicine. 2011; 4: 105–111.

[22] Andria LM, Leite LP, Prevatte TM, King LB. Correlation of the cranial base angle and its components with other dental/skeletal variables and treatment time. The Angle Orthodontist. 2004; 74: 361–366.