【摘要】：目的:采用根尖片和錐形束CT(cone beam computed tomography,CBCT)對beagle犬實驗性根尖周炎顯微根尖手術的預后進行評估。方法:將3條beagle犬18顆前磨牙髓腔暴露于口腔環(huán)境中8周,拍攝根尖片及CBCT顯示36個牙根均形成實驗性根尖周炎。根管治療后行顯微根尖外科手術,術后即刻、6月分別拍攝根尖片和CBCT,根據(jù)根尖片和CBCT的根尖透射影像面積,比較二者在識別根尖骨質缺損的差別。結果:顯微根尖手術后即刻CBCT矢狀面、冠狀面根尖透射影像面積均大于根尖片,差別具有統(tǒng)計學意義(P=0.000,P=0.026);CBCT矢狀面、冠狀面比較兩組間差別無統(tǒng)計學意義(P=0.070)。顯微根尖手術后6月復查CBCT矢狀面、冠狀面根尖透射影像面積均大于根尖片,差別具有統(tǒng)計學意義(P=0.000,P=0.012);CBCT矢狀面根尖透射影像面積大于冠狀面,兩組間差別有統(tǒng)計學意義(P=0.001)。結論:CBCT在根尖周骨質缺損的識別優(yōu)于根尖片,CBCT在根尖手術骨缺損預后評估中是一項有效的評價手段。
[Abstract]:Objective: to evaluate the prognosis of microapical operation on experimental periapical periodontitis in beagle dogs by apical slice and conical bundle CT (cone beam computed tomography,CBCT. Methods: 18 premolars of 3 beagle dogs were exposed to oral cavity for 8 weeks. Experimental periapical periodontitis was found in 36 roots by root tip film and CBCT. Microapical surgery was performed immediately after root canal therapy. Apical radiographs and CBCT, were taken respectively according to the area of apical transmission image of apical film and CBCT to compare the difference between them in the identification of apical bone defect. Results: the area of CBCT sagittal and coronal apical transmissive images was larger than that of apical film immediately after microapical operation, and the difference was statistically significant (P0. 000P0. 026). There was no significant difference between CBCT sagittal plane and coronal plane between the two groups (P0. 070). CBCT sagittal plane was examined 6 months after microapical operation. The radiographic area of coronal apical transmission was larger than that of apical film, and the difference was statistically significant (P0. 000 and P0. 012). The area of CBCT sagittal apical transmission image was larger than that of coronal plane, and the difference between the two groups was statistically significant (P0. 001). Conclusion: CBCT is superior to apical slice in the recognition of periapical bone defect. CBCT is an effective method in evaluating the prognosis of periapical bone defect.
【作者單位】： 南開大學醫(yī)學院;天津市口腔醫(yī)院;
【分類號】：R781.3

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