Abstract:

Objective　The research aimed to analyze the significance of Pont Index in the dental crowding.Methods　Re- spectively selected 91 normal occlusion persons and 101 dental crowding patients, measured every item of Pont Index of these two sample groups, and compared the results.Results　①The premolar index and molar index of dental crowding patientswere obvi- ously bigger than that of normal occlusion, and there was apparent significant difference.②There was no significant gender differ- ence of Pont Index either in normal occlusion or dental crowding patients. Whereas there was significant gender difference of pre- molar arch width and molar arch width in normal occlusion.Conclusion　The occurrence of dental crowding is clearly related to Pont Index.

Key words: Pont index, dental crowding, normal occlusion