Sammanfattning
The term molar incisor malformation (MIM) has recently been presented in scientific literature, where it is described as a condition with localized impaired root development. We here present six recently discovered cases referred to our departments.
The patients were enrolled in the study after referral and examined clinically and radiologically. Two extracted teeth were further examined with micro-CT or microscopy.
Affected teeth were first permanent molars with hypoplastic roots, narrow pulp chambers and a hypercalcified dentine layer cervical to the pulp chamber. Two of the cases also had cervical constrictions on the upper incisors. The patients were aged 8 - 12 years, presently healthy, but had experienced serious medical conditions located to the head and neck region in their first year of life. Some of the cases had been referred because of acute infections and pain.
In five out of six patients, severe health problems early in life located in the head and neck region may be associated with root malformation in molars and incisors. Patients with MIM need to be followed closely and extractions should be planned at the right time to avoid unnecessary infections and pain in addition to orthodontic problems.