サイナスフロアエレベーション法によるインプラントを行った1症例

抄録

The maxillary posterior region is often a problem area for the placement of implants. The advanced resorption of the alveolar bone is combined with an increase in pneumatization of the maxillary sinus because of the increased air pressure in the pneumatized sinus cavities. The sinus floor elevation method with a crestal approach is a modified approach of the sinus lift method and is less invasive than the usual sinus lift method.
A 42-year-old male desired prosthetic treatment supported by implant because of an edentulous right posterior maxilla, mobility of bridge of the left mandibular molar region, severe marginal periodontitis including lower left premolar, lower left second molar and upper left second molar, and a loss of lower right first molar. Because of bone loss at the edentulous right posterior maxilla, there was inadequate bone for implant anchorage. The patient was a candidate for the sinus lift method including sinus floor elevation method.
The procedures used for this patient included the following. The lower left second molar with advanced periodontal involvement was extracted. The lower left second premolar and the upper left second molar were replanted and transplanted to the lower left molar region, respectively. The lower right second molar was mesially moved surgico-orthodontically to the lower right first molar region. The sinus floor elevation method was performed to place the implant for anchorage at the upper right posterior region. An 11-month period was allowed for graft consolidation and integration. At that time, an endosseous implant was placed. Adequate bone was obtained and then placement of a 10 mm length of implant was carried out. Following a 10-month period of healing, the implant was uncovered and found to be clinically and radio graphically well integrated. An abutment was then placed and subsequently loaded with a fixed prosthesis.
The six-year four-month follow-up of this case revealed a good outcome after the sinus floor elevation method.