本文選題：CBCT　切入點(diǎn)：下頜第二恒磨牙　出處：《山東大學(xué)》2016年碩士論文

【摘要】：目的：下頜第二恒磨牙由于其復(fù)雜的牙根解剖形態(tài)常給臨床治療帶來困難,本研究利用錐形束CT (cone beam computed tomography, CBCT)技術(shù)對(duì)下頜第二恒磨牙解剖形態(tài)進(jìn)行研究,分析下頜第二恒磨牙的解剖形態(tài)特點(diǎn),并探討其解剖特點(diǎn)與牙槽骨吸收程度間的關(guān)系,為臨床治療提供理論依據(jù)。方法：選取378顆來自不同患者的下頜第二恒磨牙的CBCT圖像掃描數(shù)據(jù),記錄患者的下頜第二恒磨牙形態(tài)數(shù)據(jù)：(1)牙根長(zhǎng)度(root length, RL)(2)根管數(shù)目、是否C形根管(3)根柱長(zhǎng)度(root trunk length, RTL)(4)釉牙骨質(zhì)界處的近遠(yuǎn)中徑(mesial distal diameter, MDD)和頰舌徑(buccal lingual diameter, BLD)(5)釉珠、牙根凹陷的有無(6)根分叉開口下2 mm的寬度(7)釉牙骨質(zhì)界到牙槽骨距離(測(cè)量4個(gè)軸角處,取平均值)。同時(shí)記錄患者的姓名、性別、年齡。所有數(shù)據(jù)均由三名高年資醫(yī)師和作者測(cè)量,取平均值。結(jié)果：1、根分叉開口下2mm的寬度平均值為1.46mm,與釉牙骨質(zhì)界到牙槽骨距離γ=0.236,P=0.0160.05,結(jié)果為正相關(guān),有統(tǒng)計(jì)學(xué)意義。2、根柱長(zhǎng)度平均值4.34mm,最大6.7mm,最小1.9mm。與釉牙骨質(zhì)界到牙槽骨距離Y=-0.008,P=0.9350.05,結(jié)果無相關(guān)性,無統(tǒng)計(jì)學(xué)意義。3、釉牙骨質(zhì)界處的近遠(yuǎn)中徑平均值10.4mm,最大12.1mm,最小8.4mm。與釉牙骨質(zhì)界到牙槽骨距離γ=0.286,P=0.0030.05,結(jié)果為正相關(guān),統(tǒng)計(jì)學(xué)意義顯著。4、釉牙骨質(zhì)界處的頰舌徑平均值9.4mm,最大11.5mm,最小7.2mm。與釉牙骨質(zhì)界到牙槽骨距離γ=0.323,p=0.0010.05,結(jié)果為正相關(guān),統(tǒng)計(jì)學(xué)意義顯著。5、牙根長(zhǎng)度平均值13.9mm,最大17.2mm,最小8.6mm。與釉牙骨質(zhì)界到牙槽骨距離γ=0.230,P=0.0190.05,結(jié)果為正相關(guān),有統(tǒng)計(jì)學(xué)意義。6、牙根凹陷與釉牙骨質(zhì)界到牙槽骨距離相關(guān)性γ=0.269,P=0.0060.05,結(jié)果為正相關(guān),統(tǒng)計(jì)學(xué)意義顯著,牙根凹陷的發(fā)生率為96%。7、根管數(shù)目與釉牙骨質(zhì)界到牙槽骨距離相關(guān)性Y=0.226,P=0.0210.05,結(jié)果為正相關(guān),有統(tǒng)計(jì)學(xué)意義,其中單根管發(fā)生率為1%,2根管為31%,3根管為43%,4根管為24%,5根管為1%。8、C形根管與釉牙骨質(zhì)界到牙槽骨距離相關(guān)性γ=0.114,P=0.2510.05,結(jié)果無相關(guān)性,無統(tǒng)計(jì)學(xué)意義,本次試驗(yàn)統(tǒng)計(jì)C形根管的發(fā)生率為49%。9、釉珠與釉牙骨質(zhì)界到牙槽骨距離相關(guān)性γ=0.226,P=0.0020.05,結(jié)果為正相關(guān),有統(tǒng)計(jì)學(xué)意義,本次試驗(yàn)的結(jié)果為2.9%。結(jié)論：下頜第二恒磨牙解剖形態(tài)多變,根管、牙根結(jié)構(gòu)變異較多。本次測(cè)量結(jié)果顯示,根分叉開口下2毫米的寬度、牙根長(zhǎng)度、釉牙骨質(zhì)界處的近遠(yuǎn)中徑和頰舌徑、有無釉珠以及牙根凹陷與釉牙骨質(zhì)界到牙槽骨距離有相關(guān)性,根柱長(zhǎng)度、是否C形根管與釉牙骨質(zhì)界到牙槽骨距離無相關(guān)性。CBCT在重建患者的口腔部位的三維結(jié)構(gòu)具有其他檢查手段無可比擬的優(yōu)勢(shì)。該結(jié)果為臨床工作者提供了新的參考數(shù)據(jù),有助于提高牙體牙周治療成功率。
[Abstract]:Objective: to study the anatomic morphology of mandibular second permanent molar by cone beam computed tomography (CBCT) technique because of its complex root anatomical morphology.The anatomic characteristics of mandibular second permanent molar were analyzed, and the relationship between its anatomical characteristics and alveolar bone resorption was discussed, which provided a theoretical basis for clinical treatment.Methods: the CBCT images of 378 mandibular second permanent molars from different patients were selected to record the root length and root length of the mandibular second molars, the root length of the mandibular second molars, and the number of root canals.Is the length of the C-shaped canals 3) root trunk length? (4) mesial distal diameters (MDDs) and buccal lingual diameters (BLD5), near the bony boundary of the enamel teeth,The width of 2 mm below the root bifurcation in the root sag was 7) the distance from the enamel bone boundary to the alveolar bone was measured at four axial angles and the average value was taken.The patient's name, sex, and age were also recorded.All data were measured and averaged by three senior physicians and authors.Results the average width of 2mm at the root bifurcation opening was 1.46 mm, which was positively correlated with the distance between the enamel bone and alveolar bone 緯 0.236Pu 0.0160.05.The results showed that the average length of root column was 4.34mm, the maximum was 6.7mm, and the minimum was 1.9mm. the average length of root column was 4.34mm, the maximum was 6.7mm, and the minimum was 1.9mm.There was no correlation with the distance between the enamel bone boundary and the alveolar bone. There was no correlation. There was no statistical significance. The average distance between the enamel bone boundary and the alveolar bone was 10.4mm, the maximum was 12.1mm, and the minimum was 8.4 mm.It was positively correlated with the distance from the enamel bone boundary to the alveolar bone, the result was significant. The mean buccal and lingual diameter at the enamel bone boundary was 9.4 mm, the maximum value was 11.5 mm, and the minimum was 7.2 mm.There was a positive correlation between the distance from the enamel bone boundary to the alveolar bone and the distance from the enamel bone to the alveolar bone. The results showed that there was a positive correlation. The mean root length was 13.9mm, the maximum was 17.2mm, and the minimum was 8.6mm.There was a positive correlation between the distance between the enamel bone boundary and the alveolar bone 緯 0.230 P0.0190.05, the result was positive correlation, there was a statistical significance. The relationship between the root depression and the distance between the enamel bone boundary and the alveolar bone of the enamel tooth root sag was related to the distance between the enamel bone boundary and the alveolar bone. The result was positive correlation, and the statistical significance was significant.The incidence of root sag was 96. 7. The number of root canals was correlated with the distance from enamel bone to alveolar bone.Among them, the incidence of single root canal was 1 and the rate of 2 canals was 31 and 3 was 43. 4 canals were 43 and 4 canals were 24 and 5 canals were 1. 8C root canal and enamel cementum to alveolar bone distance (r = 0. 114) P = 0. 2510.05. The results showed no correlation, and there was no significant difference between the results, and there was no significant difference in the relationship between the incidence of single root canal and the distance between enamel bone boundary and alveolar bone.The incidence of C-shaped root canal was 49. 9. The correlation between enamel bead and the distance from the enamel bone to the alveolar bone was 0.226P0. 0020.05. The result was positive correlation with statistical significance. The result of this experiment was 2. 9.Conclusion: the anatomic morphology of mandibular second permanent molar is variable and the root canal and root structure of mandibular second permanent molar are variable.The results showed that the width of 2 mm under the root bifurcation, the length of the root, the near distal diameter of the enamel bone boundary and the buccal and lingual diameter, the presence of enamel beads and the root sag were correlated with the distance between the enamel bone boundary and the alveolar bone, and the length of the root column.There is no correlation between C-shaped root canal and the distance between enamel bone boundary and alveolar bone. CBCT has an unparalleled advantage in reconstructing the three-dimensional structure of the oral cavity of the patient.The results provide new reference data for clinical workers and help to improve the success rate of periodontal treatment.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：R781.4;R322.41

【相似文獻(xiàn)】

相關(guān)期刊論文 前3條

1 李建云;釉牙骨質(zhì)界與牙齒楔形缺損的關(guān)系[J];牙體牙髓牙周病學(xué)雜志;1996年03期

2 陶婷婷;李長(zhǎng)真;楊恒;丁一;;錐形束CT在牙周影像學(xué)檢查中的應(yīng)用研究初探[J];國(guó)際口腔醫(yī)學(xué)雜志;2014年04期

3 ;[J];;年期

相關(guān)會(huì)議論文 前1條

1 汪平;曹菲玲;王浩軍;李德華;范曉敏;王宇;;離體上頜第一、二磨牙在釉牙骨質(zhì)界截面的牙體硬組織厚度研究[A];2007年第七次全國(guó)牙體牙髓病學(xué)學(xué)術(shù)會(huì)議論文集[C];2007年

相關(guān)碩士學(xué)位論文 前1條

1 姜?dú)g;下頜第二恒磨牙牙根解剖形態(tài)的CBCT研究[D];山東大學(xué);2016年

，

本文編號(hào)：1708347