Study on CBCT measurement of maxillary premolar root canal morphology and age-related changes in individuals across various age groups
AIM:This study utilized cone-beam computed tomography(CBCT)to assess the morphology and age-related changes of the root canal system in the maxillary first and second premolars.METHODS:CBCT data from 724 patients with maxillary first and second permanent premolars were collected.The patients were categorized into six age groups:15～24 years,25～34 years,35～44 years,45～54 years,55～64 years,and 65 years and older.The root canal morphology of the maxillary first and second premolars was analyzed based on the Vertucci classification.Various measurements were taken,including buccal pulp horn height,lingual pulp horn height,distance from the roof of the pulp chamber to the cemento-enamel junction(CEJ),buccal-lingual pulp horn distance,distance from the floor of the pulp chamber to the CEJ,buccal dentin thickness,buccal-lingual canal diameter,lingual dentin thickness,distance between canal orifices,mesial dentin thickness,mesio-distal pulp chamber diameter,distal dentin thickness.RESULTS:The analysis of the root canal morphology of the first and second maxillary premolars showed no statistically significant difference in the number of roots between males and females.Additionally,with increasing age,in all age groups,the buccal pulp horn height,lingual pulp horn height,distance from the roof of the pulp chamber to the cemento-enamel junction(CEJ),buccal-lingual pulp horn distance,buccal-lingual canal diameter,and mesio-distal pulp chamber diameter decreased in the first and second maxillary premolars.Among these indicators,changes in buccal pulp horn height,lingual pulp horn height,buccal-lingual pulp horn distance,and mesio-distal pulp chamber diameter were consistent(P<0.01)and statistically significant.The buccal dentin thickness and lingual dentin thickness of the first maxillary premolar,as well as the mesial dentin thickness and distal dentin thickness of the second maxillary premolar,increased with age.Notably,the changes in mesial dentin thickness were significant(P<0.01)and statistically significant.CONCLUSION:The analysis of the relationship between the root canal morphology of the first and second premolars and gender showed no correlation with gender.The age-related changes in their root canal systems can be attributed to factors such as dentin deposition and secondary dentin formation.These factors may alter the shape of the root canal system and increase its complexity over time.
maxillary first premolarmaxillary second premolarCBCTroot canal morphologyage-related changes
NETL
NSTL
万方数据
