A system for detecting bone defects includes a connecting member for contacting the dental implant, at least one electromagnet actuator, at least one first magnetic field detecting device, at least one second magnetic field detecting device and a computation device. The contacting member has a magnetic body. The electromagnetic actuator is used to generate a variable magnetic field to oscillate the magnetic body. The first magnetic field detecting device is used to detect a magnetic field of the magnetic body and the variable magnetic field, so as to generate a first detected data. The second magnetic detecting device is used to detect the variable magnetic field, so as to generate a second detected data. The computation device is used to obtain an oscillation data based on the difference between the first detected data and the second detected data.一種骨缺損檢測系統包含一牙科植體接觸件、至少一電磁激振源、至少一第一磁場感測裝置、至少一第二磁場感測裝置以及至少一運算裝置。牙科植體接觸件具有一磁性體。電磁激振源可用以產生一可變磁場以激振磁性體。第一磁場感測裝置可用以感測磁性體之一磁場與可變磁場,而產生一第一感測資料。第二磁場感測裝置可用以感測可變磁場,而產生一第二感測資料。運算裝置可用以根據第一感測資料與第二感測資料之間的差異,得到牙科植體接觸件的一振動資料。100‧‧‧牙科植體接觸件110‧‧‧懸臂樑120‧‧‧磁性體200‧‧‧檢測器210‧‧‧第一磁場感測裝置220‧‧‧第二磁場感測裝置230‧‧‧電磁激振源300‧‧‧處理裝置400‧‧‧連接線500‧‧‧牙科植體M1‧‧‧磁場M2‧‧‧可變磁場
