Muh shield (YC3) was developed to improve the overjet and overbite in the primary dentition. However, there have been no reports on an annual growth amount evaluation using Muh shield in a primary anterior cross bite patients. Therefore, we have applied on Muh shield in two young patients with anterior cross bite. The aim of this study was to examine the treatment effects of the Muh shield in correcting a primary anterior cross bite patient.
Case1 was a girl who was a 6 years and 5 months old. The patient presented that over jet -2mm, overbite +2mm, terminal plane: mesial step type, ANB+2 °.The patient diagnosed as primary anterior cross bite. As a result case1 was increased from ANB +2° to +5°, and there was a skeletal improvement. After using Muh shield 2 years, central incisor increased from overjet -2mm to 2mm.
Case 2 was a boy who was a 6 years and 2 months old. The patient presented overjet -2mm, overbite+1mm, terminal plane: mesial step type, ANB +2°. The patient diagnosed as primary anterior cross bite. As a result case2 was increased from ANB +2°to +3° , and there was a skeletal improvement. After using Muh shield 4years, central incisor increased from overjet -2mm to +2mm.
Furthermore, case1 indicated a down forward growth of maxillary. And mandible showed downward growth. Case2 indicated a down forward growth of maxillary and mandible.
These results indicate that the use of the Muh shield improves functional effects on the skeletal system during primary dentition patients. The use of Muh shield during primary dentition might be effective because it has a function of tongue up. We will progress further study in the near future.

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In this study we evaluated the clinical performance of HA-coated implants (Integral®,Calcitek Carlsbad CA) during the period under for 10 to 13 years. Weimplanted 579 implants in 202 patients at four facilities and analyzed the clinical prognosis of the implants. Two implants failed within one year after implantation, because of the early failure of osseointegration. There were 86 failures of implants after that period during the maintenance, because of periimplantitis and loss of osseointegration.Therefore, the success rate of the HA-coated implants investigated in this study during the overall 10-13years was 85.1%. We investigated the factors affecting prognosis such as the sex, the age, the implant diameter, the implant length, and the implant location and found statistically poor prognosis on the factor of length( <8mm) and the location (mandible) of the implants. We also found that HA-coated implants suffered from the resorption of circumference bone of the implant body and dropped out during the maintenance period. These results suggested the prognosis of HA-coated implants were influenced by the method of surface treatment of HA coating, the implant body structureand the connecting mechanism of the implant body and the abutment.

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The general application of “Sinus floor elevation" has been seen in recent past as the wide spread of Implant therapy. General clinicians tend to choose “Socket Lift" which is a less invasive surgery rather than the “Lateral Wall Technique". “Socket Lift" is a technique to fill the bone grafting material into maxillary sinus through prepared implant bed in the alveolar ridge. It was difficult and time consuming to fill the bone grafting material smoothly into maxillary sinus through the duct and elevate the sinus floor by using Osteotome.
New instrument called “Sinus JO5" with funnel shape has been produced to shorten the time and to avoid infection from the graft material that had once scattered around on the ridge and gathered again and filled into the maxillary sinus. Itʼs funnel shape enables to fill the expensive material easily without wasting it.
I would like to report the superiority of “Sinus JO5" by showing my cases.

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It is conventional practice to fit a full denture in patient who,as a result to Periodontitis or other factors, have become completely edentulous. However, in the absence of any natural teeth, the occlusion changes from being tooth supported to a situation where it is supported exclusively by the oral mucosa. At this stage the dentist has no reference point as to the shape, size, color, of the original dentition, and can only images what they looked like. In addition ,the original maxilla-mandibular relationship is lost. With a full denture there are a variety of ways of diagnosing the optimal mandibular position.However, because the mucosa is not stable, and there is no fixed position ,these techniques are very difficult, and depend very much on the skill of the individual dentist, which is less than an ideal situation.
Recently, by using implants and a bone anchored bridge for edentulous patients, we are in a position to provide bone supported occlusion,
In this paper, we will describe how to decide the mandibular position and tooth form, when using bone anchored, and rigid prosthodontics.

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Among basic approaches to theory of occulusion at present, Gnathologie is easy to understand and of use. Its theory is however based on tightly mandibular joint so it is hard to be applied to temporomandibular disoder.
Therefore for treatment of TMD, it is going to be essential to determine the reference position without depend to mandibular joint.
In this article, Iʼd like to pursue the cause and the process of the phenomenon generated by its anteroinferior deviation which is called Posterior Openbite in order to consider where to situate the mandibular position.

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Dentists routinely treat oral hard tissues such as teeth and jawbones. At present, dental offices generally use dental and panoramic radiographic equipments for pretreatment examination and diagnosis.
However when two-dimensional images obtained by these equipments are not sufficient for diagnosis before implant placement. Computed Tomography( CT) is very useful to obtain more precise three-dimensional diagnostic information.
Recent spread of CT has enabled us to access to images those are more detailed and precise, and to diagnose problematic anatomy previously to implant placement. Progress in image processing technique has also made it possible to easily reconstruct images on the personal computer on the market and simulate implant recipient site by digitizing three-dimensional image information. Furthermore, surgical guide can be fabricated by applying CAD / CAM for placing an implant fixture in the accurate location by regulating the position and direction during surgery. That makes implant placement surgery accurate, safe and quick.
I will report cases to discuss how CT and the implant placement simulation software can contribute to the preoperative examination and diagnosis of Implant therapy.

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The patient of TMD who was fixed his tooth twenty years ago at our dental office, has been caused something troubles. As a result of inspect, I could guess that the causes of those troubles were difference between RP and ICP, prosthodontal planning without referring to condylar path. As a result of occlusal equilibration by the theory of Functionally Discluded Occlusion(modified Group Functioned Occlusion), the pain of masticatory muscle disappeared.

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In this study, the author discussed the necessity of a facebow on the articulator which can reproduce forward movement of human jaw and conducted a geometrical analysis ofcompensating curve. Being against the use of a facebow, the author mathematically defined compensating curve which have not been determined accurately. Once centric occlusion obtained, the position of the jaw set in the articulator is exclusively related to the movement of the jaw and maintains the movement that are ideatical to those of the jaw by the use of check-bite. Therefore, the positions of the articulator joints( center of the calibration plate and anterios guide table) does not have to correspond to that of the condyle head. There is no need to use a facebow. On the other hand, since the inclination of the movement path of the articulator is determined when the occlusion plane of the articulator is positioned, the occlusion plane of the occlusion rim should correspond to that of the articulator. In other words, it is more logical to use the occlusion plane table for setting.
In addition, with the length of the occlusion rim being a chord, compensating curve is on the circumference of the circle containing difference between the movement path of forward and backward ends of the occlusion rim on the occlusal plane table.

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