[Occlusion in implants: problems in clinical cases].

On prosthodontic treatment with dental implants ,we have refered to crown restorations similar to natural teeth and recostructed so far. Therefore differences between implants and teeth have happened many problems. Especially, for we harmonize occlusion for implant restoration with supporting tissue, superstructure of implant prosthesis, muscles surrounding the jaw and temporomandibular joint, how should we compensate for differences between implants and teeth, and observe occlusal shift and symptom in postoperative progress? It seems that there is little evidence on the relation between implant and occulusion. While, it is necessary for examination of the problem on occlusion for implant restoration to consider mechanically risk and character of dentition. It is essential to reveal that the cause of happened problems is whether trouble of implant or risk of dentition. There has not been the consensus between parafunction and practice in prothodontics in natural dentition yet. How do implants harmonize with nonfunctional and nonphysiological force? We cannot overlook problems that the factor of surplus force affects implant restorations. In the symposium, I propounded some problems through clinical cases.