Skeletal and dental maxillary morphological characteristics in patients with impacted canines: systematic review and meta-analysis

Abstract

Background There are a few hypotheses for the origin of palatally impacted canines (PIC). Nevertheless, the results of different studies are controversial. Objective Considering the evidence available in the literature to determine the skeletal and dentoalveolar dimensions in patients with PIC using cone beam computed tomography (CBCT). Search methods This systematic review adhered to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis Statement. The literature search with no publication date restriction in five databases and hand searching was performed until April 2023. Data collection and analysis Data assessing the skeletal and dentoalveolar characteristics of subjects with PIC evaluated with CBCT was extracted, and the studies’ quality was evaluated with the Newcastle-Ottawa Scale (NOS). Skeletal and dentoalveolar characteristics of subjects with PIC were compared with non-impacted subjects or non-impacted sides. MedCalc software was used to perform the meta-analysis. Statistical heterogeneity was assessed using the chi-square and I-square tests. Results The initial database search identified a total of 1153 studies. After applying the selection criteria, nine articles were included in the systematic review and meta-analysis. According to the NOS, all included articles were graded as “Good” quality. The meta-analysis showed a non-significant difference in measuring dentoalveolar height, alveolar first molar width, and basal lateral width. Controversial results were observed when evaluating both basal and alveolar first premolar widths. A significant difference was found when assessing anterior alveolar crest height and basal maxillary width. Conclusions Studies demonstrated the reduction of both dentoalveolar and skeletal maxillary parameters of the patients with PIC. The meta-analysis indicated that PIC correlates to both vertical and transverse skeletal dimensions of the maxilla. However, the results remain controversial. The findings should be interpreted with caution due to different study designs and unbalanced groups in the included studies; therefore, further research is needed for more reliable conclusions. Registration This systematic review and meta-analysis were registered in the International Prospective Register of Systematic Reviews (PROSPERO CRD42022362124)

The Analysis of Intermolar Width and Skeletal Base Class as a Predictor of Potential Maxillary Canine Impaction in Permanent Dentition: A Cross-Sectional Study

“…Similar findings have been reported in various studies in the literature where the intermolar width is decreased in patients suffering from impacted maxillary canines. 22 , 23 However, this is not always the case, as the intermolar width is sometimes not significantly associated with the impaction of maxillary canines. 14 If this problem is intervened in the mixed dentition stage, we can help the normal eruption of canine into proper occlusion.…”

Forced eruption in impacted teeth: analysis of failed cases and outcome of re-operation

“…This retrospective study was conducted using the records of patients who underwent forced eruption at the Department of Advanced General Dentistry at Yonsei University Dental Hospital over 15 years. Various studies have investigated the duration and risk factors of forced eruption treatment of impacted canines, which occurs in 0.92–2.4% of canines [ 21 ]. Most studies are limited in that they focus on forced eruption specific to canine and there is a lack of studies of forced eruption of other teeth [ 22 ].…”