Palatal displacement of canines and maxillary skeletal width (original) (raw)
Related papers
European Journal of Orthodontics, 2005
The aetiology of palatal canine impaction is unclear. The aim of this research was to investigate the occlusal features that could contribute to the aetiology of palatal maxillary canine impaction. The material consisted of the pre-treatment dental casts of 34 patients (27 female and seven male) with unilateral palatal canine impaction (impaction group). The average age of this group was 17.7 years (± 4.6). These were matched according to age, gender and type of malocclusion with a comparison group of pre-treatment dental casts from unaffected orthodontic patients. From the dental casts the following parameters were obtained: (1) dentoalveolar arch relationship, (2) missing or anomalous teeth, (3) the mesiodistal width of each maxillary tooth, (4) the upper arch perimeter, (5) the maxillary inter-premolar and inter-molar widths. The arch length-tooth size discrepancy was only calculated for subjects with no missing teeth. Palatal canine impaction occurred most frequently in subjects with a Class II division 2 malocclusion. There was an association between palatal canine impaction and anomalous lateral incisors (P = 0.01). The transverse arch dimension was signifi cantly wider in the impaction group than in the comparison group (P < 0.01). There was no statistically signifi cant difference in the mesiodistal width of maxillary teeth or in the arch length-tooth size discrepancy between the palatal canine impaction group and their matched comparisons (P > 0.05). These results suggest that the presence of an 'excess palatal width' and anomalous lateral incisor may contribute to the aetiology of palatal canine impaction.
International orthodontics, 2017
Cephalometric and arch measurements might predict the occurrence of a palatally-displaced impacted maxillary canine (PDC). Despite their clinical importance, studies in this regard are limited and controversial. In this case-control study, 35 PDC patients and 77 controls aged over 13 years were examined. Eleven cephalometric measurements: N-S, ANS-PNS, ANS-N, S-N-ANS, facial angle (FH/NPog), SNA, SNB, Y-axis (SN/SGn), gonial angle, Go-Gn/SN, and Jarabak Index were performed. The maxillary and mandibular intermolar and interpremolar widths were measured. Patients' sagittal skeletal relationships and centric occlusions (molar) were measured by radiographic and cast examinations. The differences between the two groups in terms of the above-mentioned cephalometric and anatomic variables were assessed using Chi(2) and Mann-Whitney U-tests (α=0.05). Chi(2) showed a significant negative association between dentoalveolar class I (molar) and PDC occurrence (P=0.018), but not between PDC ...
Journal of the Pakistan Dental Association
To investigate if there is any relationship between palataly impacted canines and missing or anomalous lateral incisors as well as maxillary arch widths. METHODOLOGY: The materials for this study comprised of orthodontic records including orthopantomographs and dental casts of patients visiting the Dental OPD of Bahria University Medical and Dental College. The sample size was 60 and was divided into 30 experimental subjects and 30 control subjects. The experimental group comprised of subjects having palatal canine impaction while the control group included subjects without palatal impactions. The presence of impacted canines was confirmed on OPG, their palatal presence was checked with horizontal parallax using an additional periapical radiograph. Dental casts were used not only to assess anomalies/ or absence of lateral incisors but also for measuring maxillary width from interpremolar and inter moalr distance. Data was analyzed using SPSS software. Co-relation between incisor anomaly or absence with impaction was checked using fisher exact test. To see the significance of intermolar and interpremolar widths (mm) between case and controls, independent sample t test was applied. RESULT: Subjects with palatal canines had a weak association with anomalous and absent lateral incisors as 83% of experimental subjects and 93% of control subjects had normal lateral incisors. Maxillary width taken from inter-molar and inter-premolar distance, also had similar values between the experimental subjects and controls. CONCLUSION: There was no association between palataly impacted canines with absent and anomalous incisors nor with maxillary skeletal width.
Association between maxillary canine impaction and arch dimensions
Australian orthodontic journal, 2012
To compare palatal height index, arch width, and arch length characteristics in Iranian patients presenting with palatal and buccal canine impaction with a matched control group. The casecontrol study examined 53 patients with canine impaction. The subjects were divided into two groups determined by buccal or palatal impaction which were compared with 53 control subjects presenting without impaction. Subjects in the experimental groups were matched with individuals in the control group according to age, gender, crowding and type of malocclusion. Palatal height and arch length were measured with a Korkhaus three-dimensional divider. Arch width was determined in the anterior and posterior portions of the maxillary arch with a digital caliper. Data were compared with paired t-tests. The buccal canine impaction group exhibited mean differences in arch length between the case and control groups of 0.8 mm (SD 1.63, p = 0.041). The differences between the case and control groups in intermo...
Skeletal features in patient affected by maxillary canine impaction
Medicina Oral Patología Oral y Cirugia Bucal, 2013
Objective: To analyze the skeletal features of patients with maxillary canine impaction. Material and Methods: The complete pre-treatment records of 1674 orthodontic patients were examined. From the subjects with maxillary impacted canine 12 patients were excluded , remaining 108. The subjects with maxillary impacted canine were divided into two study groups: a palatally displaced canine group (PDCG) (77 patients) and a buccally displaced canine group (BDCG) (31 patients). The values of the skeletal features measured on the lateral cephalometric radiograph were compared with a control group (CG) of 121 subjects randomly selected from the initial sample without maxillary canine impaction. The statistical analysis of the difference between the study groups and the CG was tested using χ2 test and Fisher's exact test. The level of significance was set at P ≤0.05. Results: The CG was characterized by increased values of A point-Nasion-B point angle (ANB) and by a retropositioned or smaller lower jaw. PDCG patients showed normal skeletal features compared to the CG, presenting mainly I class and lower rank of II and III sagittal skeletal features. PDCG subjects presented also normal values of the Steiner vertical skeletal relationship angles with normal facial divergence compared to the CG. PDCG cases were also characterized by horizontal and prognathic growth. BDCG did not present significant differences in skeletal features compared to the CG, except for an increased ANB. Conclusions: Palatally displaced canine (PDC) was frequently the only orthodontic problem of patients and was not associated whit altered skeletal features. The frequent absence of malocclusion in PDC patients explains the delayed identification of this problem. BDCG patients did not present significant differences in skeletal features with respect to the orthodontic population. The presence of both buccally displaced canine (BDC) and malocclusion makes the patient with BDC both aware of the need for, and motivated to undergo, orthodontic treatment.
Progress in Orthodontics
Background This study aimed to three-dimensionally evaluate the qualitative and quantitative maxillary basal, dentoalveolar, and dental dimensions in patients with unilateral or bilateral maxillary impacted canines relative to their normal peers. Materials and methods This is a retrospective comparative study. Cone-beam computed tomography images of one hundred and fifty adult patients were divided into three equal groups: unilateral, bilateral, and control groups. Each had 50 patients that were three-dimensionally analysed. The quantitative measurements involved three basal (molar basal width, premolar basal width, and arch depth), seven dentoalveolar (molar alveolar width, premolar alveolar width, inter-molar width, inter-premolar width, inter-canine width, arch length, and arch perimeter), and two dental (canine length and width) measurements. The qualitative measurements included four bone density areas (buccal, lingual, mesial, and distal) around the maxillary impacted canines....
Maxillary tooth size variation in dentitions with palatal canine displacement
The European Journal of Orthodontics, 2002
The association between the presence of palatally displaced maxillary canines (PDC) and other anomalies is well known, particularly with regard to the size and form of the lateral incisor. The present study investigated the connection between the maxillary canine anomaly and the existence of a reduction in the size of the other teeth in the maxilla in 58 consecutively treated patients (37 females, 21 males) aged 11-15 years, and compared these with a control group of 40 consecutively treated subjects (20 males, 20 females) with normally erupted maxillary canines. The findings indicate that the teeth of PDC males are reduced in size and similar to those of PDC females, in sharp contrast to the general population, where males have larger teeth. This is the result of a dimensional reduction in the teeth of PDC males, which was statistically significant for all teeth (P < 0.01) in the bucco-lingual (B-L) dimension, and for the first premolars and first molars in the mesio-distal (M-D) dimension. The sole teeth affected for both sexes were the lateral incisors in their B-L dimension. Bilaterally and unilaterally affected subjects presented differing M-D and B-L tooth dimensions.
Relationship Between the Initial Position of Palatally Displaced Canines and Treatment Duration
Odovtos - International Journal of Dental Sciences
This prospective study aimed to assess the positional features of palatally displaced maxillary canines (PDCs), their relationship with both cephalometric and dental cast measurements and treatment duration. Pretreatment panoramic and lateral cephalometric radiographs and dental casts of 46 patients (23 patients with uni/bilateral PDC and 23 patients with Class I malocclusion) were collected. The mesial inclination of the permanent canine to the midline (α angle), the distance from the cusp tip of the permanent canine to the occlusal line (d distance), and the mesial position of the crown of the displaced canine (sector) were measured on the panoramic radiographs. SNA°, SNB°, ANB°, SN-GoGn°, SN-PP°, and PP-MP° angles and sagittal inclinations of the PDCs’ (C-PP°) were measured on cephalometric radiographs. Arch length discrepancies and transversal arch measurements were also performed. The Student’s t-test, Mann-Whitney U test and Kruskal-Wallis test were used to compare variables t...