Morphological analysis of cases with ectopic eruption of the maxillary first permanent molar

Ectopic eruption of the maxillary second molar: Predictive factors

“…A previous study evaluated vertical dimensions of subjects with posterior occlusal discrepancies and found a relationship between dolichocephalic patterns or posterior rotation of the chin and the ectopic eruption of maxillary first molars. 27 However, in the current study, there were no significant differences in the vertical skeletal patterns measured by the palatal, occlusal, and mandibular planes between the normal and ectopic eruption groups. This was probably because the ectopically erupted second molars were infraoccluded distobuccally and did not have a wedging or opening effect on the posterior occlusion.…”

Association between Ectopic Eruption of the Maxillary First Permanent Molar and Skeletal Malocclusion

“…Pulver et al [6] suggested that ectopic eruption can be caused by a combination of factors, such as an abnormally short maxillary length and a posterior maxillary position in relation to the cranial base. Canut and Raga [7] suggested that a short and posteriorly positioned maxilla may affect the ectopic eruption of the maxillary first permanent molar.…”

Correlation between the frequency of eruption disorders for first permanent molars and the occurrence of malocclusions in early mixed dentition

“…There is a frequency of ectopically erupted molars of 2−6% reported in the literature [1,4,15,23]. The cause of disturbed tooth eruption is unknown, and multiple factors are assumed [3,6,15,23]. The process of tooth eruption is complex and controlled simultaneously by many factors.…”

“…Die Prävalenz ektopisch durchbrechender Molaren wird in der Literatur mit 2-6% [1,4,15,23] angegeben. Die Ursache für den gestörten Zahndurchbruch ist nicht bekannt; angenommen wird ein multifaktorielles Geschehen [3,6,15,23]. Der Prozess des Zahndurchbruchs ist ein komplexes Geschehen, das durch viele Faktoren synchron gesteuert wird.…”