抄録
Purpose:In an attempt to evaluate osseointegration, a comparison was done on the influence of various kinds of abutment, and on differences in torque, on the results of vibration analysis, as factors that can influence the vibration analysis of an implant body.
Materials and Methods:The measurement sample was a model in which a fixture was implanted in super-hard plaster. A conical abutment was made using a conical gold cylinder, like that used in the UCLA Abutment, and the superstructure body of a lower jaw small molar was made using super gold (referred to as CA and UA hereafter). Both CA and UA were connected to the superstructure body by four values of torque:5,10,20,or 32 Ncm. To measure the face of each sample, an acceleration sensor was installed on the side of the tongue. An FFT analyzer was used to measure the Periotest from the buccal side. Differences in torque for the various kinds of abutment were compared according to the influence exerted on the vibration in continuous time, and also the peak frequency. The measurement sample was a model in which a fixture was implanted in super-hard plaster. A conical abutment was made using a conical gold cylinder,like that used in the UCLA Abutment, and the superstructure body of a lower jaw small molar was made using super gold(referred to as CA and UA hereafter). Both CA and UA were connected to the superstructure body by four values of torque:5,10,20,or 32 Ncm. To measure the face of each sample, an acceleration sensor was installed on the side of the tongue. An FFT analyzer was used to measure the Periotest from the buccal side. Differences in torque for the various kinds of abutment were compared according to the influence exerted on the vibration in continuous time, and also the peak frequency.
Results and Discussion:As for the vibration in continuous time, a torque beyond 10 Ncm was not enough to influence the vibration in CA, whereas the vibration was marked in UA when the torque became strong. Vibration in continuous time therefore appeared to become short. In CA, a torque beyond 10 Ncm did not appear to influence the peak frequency, whereas in UA, the peak frequency rose when the torque became strong. Thus, the torque influences an upper structure body that is connected to it directly.
