本文選題：上頜第一磨牙 + 錐形束CT　； 參考：《重慶醫(yī)科大學(xué)》2012年碩士論文

【摘要】：目的：利用錐形束CT（CBCT）研究活體上頜第一磨牙和上頜第一前磨牙根中上2/3和根尖1/3的根管影像以及上頜第一磨牙近頰第二根管（MB2）的發(fā)生率和根管影像，為臨床根管治療提供相應(yīng)的影像學(xué)依據(jù)。 方法：截取所選病例上頜第一磨牙、上頜第一前磨牙根中上2/3和根尖1/3的橫斷面影像，針對(duì)上頜第一磨牙和上頜第一前磨牙根管數(shù)目進(jìn)行分析研究。截取上頜第一磨牙根管口橫斷面影像，針對(duì)上頜第一磨牙第二根管根管口的位置以及發(fā)現(xiàn)率進(jìn)行分析研究。 結(jié)果：上頜第一磨牙近頰根管根下1/3單根管發(fā)生率最高85.95%，雙根管同樣位置最低，11.19%；遠(yuǎn)頰根管單根管根中上2/3發(fā)生率最高89.05%，雙根管根下1/3最低5.95%；腭單根管根中上2/3和根下1/3發(fā)生率均高98.1%。男性根中上2/3水平橫斷面針對(duì)根管數(shù)較女性增多，具顯著差異（P0.01）。近頰、遠(yuǎn)頰根管均出現(xiàn)彎曲，，一部分具有明顯第二彎曲。腭部根管較為走向平直。不同年齡組上頜第一磨牙MB-MB2為1.42～1.47±0.49～1.38；MB2-DB為4.38～4.50±0.63～1.34；MB2-P為4.38～4.50±0.66～1.38。不同性別組上頜第一磨牙MB-MB2為男性1.39±0.24；女性1.42±0.62；MB2-DB為男性4.77±0.78；女性4.01±0.47；MB2-P為男性4.86±0.66；女性4.28±1.02。上頜第一磨牙MB2根管口位于近頰根管口的遠(yuǎn)中舌側(cè)，從MB-P看，根管口在這段距離連線近中處。近頰部根中上2/3MB2檢出率42.62%；根下1/3處檢出率11.19%。上頜第一磨牙MB2檢出率以10～19歲、20～29歲組最高67.14%；各組在近頰根中上2/3檢出率存在差異性近頰部根中上2/3處男性MB2檢出率最高54.75%，根中2/3處檢出率男女具差異性（p0.01）。 上頜第一前磨牙單根管的上頜前磨牙的頰、舌徑較寬,單根單根管的牙齒未見明顯的頰、舌向彎曲。單根多根管的牙齒,可見少數(shù)牙齒彎曲(占單根牙的11%)。牙齒分叉為雙根或半雙根時(shí),則易出現(xiàn)根管彎曲(占雙根牙的37%)。不同年齡組根管橫截面形狀分布有差異(P0.05):根尖段橫截面形狀以圓形為主;根中上段橫截面形狀以扁形為主，隨著年齡的增長，扁形比例下降，圓形比例增大。 結(jié)論： 1、CBCT技術(shù)可以較為準(zhǔn)確地對(duì)上頜第一磨牙和上頜第一前磨牙根管數(shù)目進(jìn)行確定。 2、CBCT技術(shù)可以準(zhǔn)確掃描上頜第一磨牙和上頜第一前磨牙不同位置根管彎曲的解剖形態(tài)，為診療提供依據(jù)。 3、CCBT可以準(zhǔn)確定位上頜第一磨牙近頰中第二根管的位置。 4、CBCT可以真實(shí)反映上頜第一磨牙近中頰側(cè)第二根管的解剖形態(tài)，圖像清晰，可以給臨床工作提供重要的參考依據(jù)。 5、CBCT技術(shù)可以明顯提高上頜第一磨牙MB2的發(fā)現(xiàn)率。 6、CBCT對(duì)MB2的發(fā)現(xiàn)率會(huì)因外在因素的影響而有所降低。
[Abstract]:Objective: to study the incidence and root canal imaging of maxillary first molars and maxillary first premolars in the first maxillary molars and maxillary first premolars by means of CT-CBCTT in the presence of 2 / 3 and 1 / 3 of the root canals and the second buccal canals of the maxillary first molars. To provide the corresponding imaging basis for clinical root canal therapy. Methods: the cross-sectional images of maxillary first molar, maxillary first premolar and maxillary first premolar were obtained. The root canals of maxillary first molar and maxillary first premolar were analyzed and studied. The cross-sectional images of the root canal orifice of the maxillary first molar were taken and the location and the discovery rate of the second root canal orifice of the maxillary first molar were analyzed and studied. Results: the incidence of 1 / 3 single root canal in the first maxillary first molar was the highest at 1 / 3 of the proximal root canal, and the lowest was 11.19% in the same position of the double root canal; the highest incidence was 89.05 in the single root canal root of the distal buccal canal, the lowest 5.95 in the 1 / 3 in the lower root canal root, the 2 / 3 in the palatine root canal root canal root and the lowest in the palatine root canal root canal root. The incidence of subroot 1 / 3 was 98.1% higher. The number of root canals in male was significantly higher than that in female at the level of 2 / 3 in upper root (P 0.01). The proximal and distal buccal root canals were all curved, and some of them had obvious second curvature. The root canal of the palate is more straight. The MB-MB2 of maxillary first molars in different age groups was 1.42 鹵0.49, 1.38B ~ (2-DB), 4.38 ~ 4.50 鹵0.63 ~ (1.34) B ~ (2-P), 4.38 ~ 4.50 鹵0.660.66 ~ (1.38), respectively. The MB-MB2 of maxillary first molar in different sex group was 1.39 鹵0.24 in male, 4.77 鹵0.78 in female in 1.42 鹵0.62MB2-DB, 4.86 鹵0.66 in male and 4.28 鹵1.02in female. The MB2 root canal orifice of the maxillary first molar is located at the distal lingual side of the proximal root canal orifice. From the MB-P view, the root canal orifice is near the line. The detection rate of 2/3MB2 was 42.62% in proximal root and 11.19% in 1 / 3 under root. The detection rate of MB2 in maxillary first molar was the highest in the group of 10 ~ 19 years old and 20 ~ 29 years old, and there was a difference in the detection rate of MB2 in the upper 2 / 3 of the proximal buccal root in each group. The highest detection rate of MB2 was 54.75 in the upper 2 / 3 of the proximal buccal root, and the difference was found in the 2 / 3 of the male and the female in the root of the maxillary first molar. The maxillary premolars of the first maxillary premolars with a single root canal had a wider tongue diameter, but no obvious buccal appearance in the single root canal, and the tongue was curved in the direction of the tongue. A few teeth are curved (11% of a single tooth) with multiple canals. When the tooth forks into two or half double roots, root canal bending is easy. The distribution of cross section of root canal in different age groups was different (P 0.05): the shape of cross section of root tip was mainly circular, and the shape of cross section of middle and upper part of root was flat. With the increase of age, the proportion of flat shape decreased and the ratio of circle increased. Conclusion: 1 CBCT can accurately determine the number of root canals of maxillary first molar and maxillary first premolar. 2CBCT technique can accurately scan the anatomic morphology of root canal bending in different positions of maxillary first molar and maxillary first premolar, which provides basis for diagnosis and treatment. CCBT can accurately locate the second canals in the proximal cheek of maxillary first molar. 4CBCT can truly reflect the anatomic morphology of the second canals of the proximal buccal side of maxillary first molar, and the image is clear, which can provide important reference for clinical work. 5) MB2 of maxillary first molar could be detected by CBCT. The detection rate of MB2 was decreased by external factors.
【學(xué)位授予單位】：重慶醫(yī)科大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：R816.98

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 孫書昱;劉n

本文編號(hào)：1779419