Cone beam CT research on tooth hard tissue and pulp cavity morphology of primary mandibular first molars in children from Fuzhou region
Objective To analyze tooth hard tissue and pulp cavity morphology of primary mandibular first molar(PM-FM)in children from Fuzhou region by cone beam CT(CBCT),and to provide reference for clinical treatment and oral related teaching and research work.Methods CBCT images of 119 pediatric patients were included,and tooth morphology was analyzed using software such as Mimics and 3-matic.Pulp cavity was reconstructed in three dimensional and the data were analyzed.The number and distribution of root canals,the height of the pulp chamber at the root bifurcation,and the thickness of the pulp chamber roof and floor were recorded.The gender differences in the above data were compared,and the incidence of taur-odontism was analyzed statistically.Results The highest proportion of PMFM with two mesial and two distal root canals was 48.8％,and the proportion of teeth with the same number and distribution of left and right root canals was 81.8％.There were statistical differences in the number and distribution of root canals between different genders(P＜0.05).There was no signifi-cant difference in the thickness of the roof and floor of pulp chamber and the height of the pulp chamber between different gen-ders(P＞0.05).The incidence of taurodontism was 4.72％.Conclusion In this study,the most common types of PMFM in Fuzhou region were two mesial and two distal root canals,and the number and distribution of left and right root canals were the same in most cases.
primary mandibular first molarscone beam CTroot canaltooth hard tissue
万方数据
维普
