Relationship Between the Initial Position of Palatally Displaced Canines and Treatment Duration (original) (raw)
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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 ...
Palatal displacement of canines and maxillary skeletal width
American Journal of Orthodontics and Dentofacial Orthopedics, 2006
The purpose of this study was to determine whether a clinically significant association exists between maxillary skeletal width and palatal canine impaction, also known as palatally displaced canine (PDC). Methods: Seventy-nine patients with PDC were matched for age, sex, and malocclusion to 79 controls. Maxillary and mandibular skeletal widths and nasal cavity widths were measured on posteroanterior cephalograms; maxillary and mandibular intermolar widths were measured on dental casts; and maxillary interalveolar arch widths at 3 levels (canine, premolar, and first molar) were measured on occlusograms. Results: Only maxillary alveolar arch width at the canine level was significantly different between the 2 groups. However, further analysis showed that the presence of erupted deciduous or permanent canines, rather than their absence in the canine area (whether due to extraction, exfoliation, impaction, or not yet having erupted), was strongly associated with maxillary intercanine alveolar arch width. Conclusions: The additional finding in this study that the eruptive status of canines significantly affects maxillary alveolar arch width in this area suggests that maxillary intercanine alveolar arch width as measured in this or other studies is not a good predictor of PDC.
The Angle Orthodontist, 2018
Objectives: To assess palatal vault height, tooth size, and dental arch dimensions in patients with unilateral and bilateral palatally displaced canines compared with a control group. Materials and Methods: A sample of 66 patients (mean age: 11.5 ± 1.0 years) with 22 unilateral palatally displaced canines (UPDCs), 22 bilateral palatally displaced canines (BPDCs), and 22 controls (C) were consecutively recruited. All three groups had dental casts that were scanned digitally using the OrthoX three-dimensional model scanner. Tooth size, palatal vault height, dental arch width, dental arch depth, dental arch length, and dental arch space were measured by the same examiner using the GOM software. Remeasurements were made in 10 randomly identified patients. Results: The palatal vault height was significantly lower in the BPDC group compared with controls. A significantly smaller mesial-distal crown width and, in general, more spacing in the maxilla were found in the UPDC and BPDC groups. ...
Objectives The study objective was to evaluate the tooth position of maxillary permanent canines in German orthodontic patients with non-syndromic cleft lip and/or palate and Robin sequence compared to a control group without. Materials and Methods A total of 116 panoramic radiographs were included and divided into group 1 craniofacial disorder (n = 50) and group 2 without (n = 66). In order to evaluate the position of maxillary canines, radiographic parameters (sector subdivision; inclination angle) were used. Additionally, clinical records, parameters like sex, cleft localization, interobserver reliability were evaluated. Results The canine position in sector subdivision showed no position in sector 1 and 2. The most common canine sector position in group 1 was sector 5 in the first quadrant and sector 4 in the second and group 2 sector 5 in both quadrants. Inclination angle showed statistically significant displacement tendency (p = 0.015) of 11 cases in group 1 and 6 in group 2 ...
Age as Factor in the Change of the Position in Impacted Maxillary Canine
Journal of Morphological Sciences, 2019
Background: Many studies have shown that mesiodistal position of impacted maxillary canine (IMC) gives the best prediction values for orthodontic treatment, or, the closer the impacted canine lies to midline, the poorer is the prognosis for orthodontic alignment. Aim: The aim of the present study is to classify IMC according to canine crown horizontal overlap with lateral or central incisor's root; to find their correlation with the age of patients with IMC. Materials and methods: A cross-sectional survey was carried out in 104 patients with IMC who attended several polyclinics and dental ordinations in north-east part of North Macedonia. Patients’ dental records as well as their panoramic radiographs were examined. We used a sector classification by Alesandri et al. Results: Dominant position of the impacted canines cusps in younger group (from 10-15 years of age), is when it is overlapping with half and a whole width of lateral incisor's root 9 (28,13%) and 17 (53,13%)), c...
International Orthodontics, 2017
Background and purpose: 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. Methods: 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 (a = 0.05). Results: Chi 2 showed a significant negative association between dentoalveolar class I (molar) and PDC occurrence (P = 0.018), but not between PDC and skeletal sagittal relationships. Facial
The Challenging Biomechanics in a Maxillary Lateral Incisor and Canine Transposition Malocclusion
JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH, 2019
Dental transposition is an alteration that occurs in dental positioning, involving two adjacent teeth. Transpositions of canines are usually accompanied by other dental anomalies such as impaction of the incisors, missing lateral incisor, peg shaped laterals, rotations or dilacerations. Twenty percent of the transpositions involve the canine and upper lateral incisors. Dental transpositions are rare and may be complete or incomplete. The aetiology of transposition is still obscure. Several populations were studied to determine the prevalence of dental transpositions. Twenty percent of the transpositions involve the canine and upper lateral incisors. A clinical case is presented here, with canine and lateral incisor transposition and the biomechanics used in orthodontic treatment for the positioning of the canine in Class I and in the line of occlusion has been described. Correction of the transposition was performed with a fixed appliance for three-dimensional biomechanical control. The root of the left lateral incisor was moved to the palatal side to allow the movement, with the inclination movement of the crown, to distal the canine. The position of the miniimplant favoured distal movement without loss of anchorage of the teeth of this hemi-arch (left). With the canine positioned in place, third-order folds were inserted in the arch to move the lateral root to the buccal side. The canine was positioned in Class I relation in the line of occlusion with health, aesthetics, function and gingival and periodontal health remained stable after a year follow-up, demonstrating that the applied biomechanics were correct. [Table/Fig-1]: Phase I intraoral photographs-a) right lateral intraoral image; b) frontal image c) left lateral intraoral image d) maxillary occlusal view e) Mandibular occlusal view f) transposition of the upper left canine between the lateral and central incisor g) panoramic radiograph, h) cephalometric radiograph, and i) cephalometric tracing. The panoramic radiograph confirmed the delayed eruption of the permanent dentition. The upper left canine was unfavourably
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.
The use of panoramic radiographs to localize displaced maxillary canines
Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology, 1999
The purpose of this investigation was to develop a reliable method of diagnosing the position of a displaced maxillary canine on the basis of a single panoramic radiograph. Study design. A total of 115 panoramic radiographs depicting 164 displaced maxillary canines were evaluated. The ratio of the width of the displaced canine to the width of the homolateral central incisor (the canine-incisor index) and the ratio of the width of the displaced canine to the width of the contralateral canine (the canine-canine index) were calculated. The height of the crown of each displaced canine was classified in the vertical plane, relative to the adjacent incisor, as apical, middle, or coronal. Results. There was an overlap in the canine-incisor index ranges of the buccal (0.94-1.45) and palatal (1.15-1.29) canines in the apical zone. In the middle and coronal zones, a clear difference could be seen between the canine-incisor indices of labially (0.78-1.11) and palatally (1.15-1.7) located canines. A cutoff point of 1.15 was determined. Conclusions. Provided that vertical restriction and the canine-incisor index are used, the panoramic radiograph can serve as a useful indicator for determining the position of an unerupted maxillary canine.