投稿者: kousuke_itou

レントゲンの被爆について

”シーベルト”という単位を最近よく聞くようになりました。

レントゲンを撮影する場合、X線を当てて撮影します。このとき、人体は放射線にさらされます。これを”放射線被爆”といいます。大量の放射線被爆は人体に有害です。ただどの程度の被爆にさらされるかが問題でその尺度として”シーベルト”という単位が用いられます。

一般に、100ｍSvが健康被害が出始める被爆量なので歯科用レントゲンでの被爆はほぼ問題ないとおもわれます。さらに、鉛入りのエプロンで防御もしますので実質の被爆量はさらに減ります。

インプラント vs 根管治療

Allan S. Deutsch, D.M.D.

Quick Factoid: Endo vs. Implants

January – March 2009How will general dentists doing root canals react? It is reported that

someare bypassing endo altogether and going straight to single-tooth implants. The indications,treatment planning, and considerations are varied; what is your reaction? You can reach me at:adeutsch@edsdental.com.

Comparison of Success of Implants Versus Endodontically Treated Teeth

J. P. Hannahan and P. D. Eleazer

Implants versus root canal therapy is a current controversy in dentistry. The purpose of this investigation was to compare the success of each treatment, with minimal subjective grading. Outcome was determined by clinical chart notes and radiographs. Failure was defined as removal of the implant or tooth. Uncertain findings for implants were defined as mobility class I or greater, radiographic signs of bone loss, or an additional surgical procedure. Mobility, periapical index score of 3 or greater, or the need for apical surgery was classified as uncertain for endodontically treated teeth. Success was recorded if the implant or tooth was in place and functional. Implants were placed by periodontists in a group practice, whereas the endodontic treatments were performed by endodontists in group practice. Charts of 129 implants meeting inclusion criteria showed follow-up of an average of 36 months (range, 15-57 months), with a success rate of 98.4%. One hundred forty-three endodontically treated teeth were followed for an average of 22 months (range, 18-59 months), with a success rate of 99.3%. No statistically significant differences were found (P = .56). When uncertain findings were added to the failures, implant success dropped to 87.6%, and endodontic success declined to 90.2%. This difference was not statistically significant (P = .61). We found that 12.4% of implants required interventions, whereas 1.3% of endodontically treated teeth required interventions, which was statistically significant (P = .0003). The success of implant and endodontically treated teeth was essentially identical, but implants required more postoperative treatments to maintain them.

A topic that seems to be coming up more and more is “endodontics versus implants, when to do which?” More and articles are being written on the success of endo versus implants.

The article below was published in the November 2008 issue of the Journal of Endodontics.

要約

　まあ、簡単に読むとインプラントも根管治療も成功率は変わらないけどインプラントはプロフェショナルなお手入れをしっかりねという内容だと思います。なら、治せるなら根管治療したほうが、いいんじゃない？と思いますがいかがでしょう。