著者

宮本 洋二 藤澤 健司 武知 正晃 桃田 幸弘 長山 勝 山内 英嗣 坂東 永一 日野出 大輔

出版者

公益社団法人 日本口腔インプラント学会

雑誌

日本口腔インプラント学会誌 (ISSN:09146695)

巻号頁・発行日

vol.15, no.4, pp.436-445, 2002-12-31 (Released:2015-08-20)

参考文献数

43

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To clarify the effects of clinical factors on the failure (early failure) of osseointegration establishment of titanium implants, we statistically carried out a clinical examination on 373 fixtures of Brånemark implants. Fifteen fixtures (4.0%) failed to establish osseointegration before the fitting of superstructures. Results are summarized as follows: 1.Age and sex did not affect early failure. 2.Although there was no significant difference in the rate of early failure between the maxilla and the mandible, the prognosis of the maxilla, in women, was poorer than that of the mandible. No difference among regions in the maxilla or mandible was detected. 3.Variations of diameters and kinds of fixtures did not affect early failure. 4.In the length of fixture, the prognosis of 10 mm or less of the fixtures was poor, and the prognosis of fixtures of 13 mm or less was poorer in the maxilla. 5.The initial stability of fixtures at installation was deeply relevant to early failure. 6.The healing period between fixture installation and abutment connection did not affect early failure. 7.There was no significant difference in the rate of early failure between smokers and non smokers.

著者

宮本 洋二 藤澤 健司 福田 雅幸 湯浅 哲也 長山 勝 山内 英嗣 河野 文昭 日野出 大輔

出版者

公益社団法人 日本口腔インプラント学会

雑誌

日本口腔インプラント学会誌 (ISSN:09146695)

巻号頁・発行日

vol.18, no.2, pp.292-301, 2005-06-30 (Released:2014-11-15)

参考文献数

30

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The purpose of this study was to determine whether clinical success can be achieved with immediate loading in the edentulous maxilla and mandible with Brånemark implants (Nobel Biocare, Goteborg, Sweden) at one year after placement of the implants. The study sample consisted of 18 patients who were edentulous or about to lose all remaining teeth. A total of 118 fixtures were placed in 7 maxillae and 12 mandibles, including one bimaxillary patient. Ninety seven of the 118 fixtures were immediately loaded and 21 fixtures were submerged. Five to 7 fixtures (mean of 5.9 fixtures) supported the prostheses in the maxilla and 4 or 5 fixtures (mean of 4.7 fixtures) in the mandible. All fixtures immediately loaded were placed in the incisor and premolar regions of both maxilla and mandible. The mean lengths of the fixtures in the maxillae and mandibles were 14.8±1.8 mm and,15.6±2.6 mm, respectively.All of 41 immediate loading fixtures in the maxillae showed a placement torque of more than 35 Ncm. Although 5 of 56 fixtures in the mandibles showed a placement torque of 30 Ncm, remaining fixtures showed more than 35 Ncm. Provisional implant-supported fixed prostheses were fabricated in a laboratory from an impression and were placed on the next day after surgery. After a 4-to 7-month healing period, a definitive prosthesis was fabricated and placed. One implant, although still osseointegrated, was removed owing to bone resorption. In the patient, the provisional prosthesis was supported by 4 remaining fixtures;thus the cumulative survival rates for fixtures and prostheses were 99.0%and 100%, respectively, after one year. This clinical report suggests that immediate loading of implant-supported fixed prostheses in the edentulous maxilla and mandible can be a safe and successful treatment as long as patients are carefully and strictly selected.