The dental implantation has been a popular treatment for edentulous and partially dentate patients. To assess osseointegration and discriminate bone defects effectively is demanding for obtaining successful dental implantation. This study aims at developing noncontact a detection technique to measure the severity as well as to locate the orientation of imperfection around bone-implant interface based on resonance frequency analysis (RFA). To justify the effectiveness, both in vitro (artificial bone defects) and in vivo (animal tests) models were performed. A prototype design of an integrated excitation and detection transducer was proposed.