Radiological measurement and analysis of mesiodistal space at mandibular incisor positions
Objective To investigate the mesiodistal space in the area of multi-consecutive mandibular incisors,using CBCT image data,in order to provide a theoretical basis for the restoration of missing mandibular incisors and dental implant surgery.Methods CBCT imaging data of 500 patients were selected.The mesiodistal space in the area of multi-consecutive mandibular incisors were meas-ured and statistically analyzed,and the feasibility of different implant placement strategies was evaluated.Results The mesiodistal space between two mandibular central incisors was(10.72±1.10)mm,and the mesiodistal space between mandibular central and lateral incisors were(11.33±1.00)mm and(11.45±0.98)mm on the left and right sides,respectively.The mesiodistal space between three consecutive mandibular incisors were(15.69±1.25)mm and(15.79±1.26)mm on the left and right sides,respectively.The mesiodistal space between four consecutive mandibular incisors was(20.76±1.48)mm.There was a gender difference in the mesiodistal space between mandibular incisor positions,with males having slightly larger space than females.Conclusion The mesiodistal space between mandibular incisors is narrow.When two consecutive incisors are missing,only a few patients are available for two narrow di-ameter implants,while others have to choose cantilever restoration.When more than two mandibular incisors are missing,most patients are available for two narrow diameter implants,restoring with implant-supported fix partial bridges.