Observation Of Bone Mineral Density With CBCT And RVG Chronic Periapical After Root Canal Treatment

Objective: To observe the clinical application value of bone mineral density for twomeasurements Teeth after root canal treatment week trip through the diagnosis of chronicperiapical in clinical. After Root canal treatment, teeth were completely without pain, biteto eat normally. Regular teeth shooting Cone Beam CT (CBCT) and Radio Visio Graphy(RVG),Application of the measurement of bone mineral density, bone mineral density wasobserved after changed in root canal therapy, analyzed the characteristics of twomeasurement methods for clinical reference and guidance.Methods: male patients35cases (age18-40years old)were diagnosed chronicperiapical by the same doctors in clinical at random. the same doctors of Radiologyscreened teeth after0month,3months,6months,9months,12months of shooting ConeRadio Visio Graphy(RVG),Simultaneously of which12cases after,3months,6months,9months12months of shooting Cone Beam CT(CBCT) and used their own software tomeasure the position of the teeth with apical same lesion area alveolar bone densitymeasurement and control teeth. Cone Beam CT:Sagittal, coronal and axial tomography,and then according to the thickness of0.25mm,0.25mm pitch and image selection.Selecting the teeth with apical lesion area coronal, sagittal plane and documentarymaximum and record number, The use of CBCT came with software were used to measurethe maximum lesion apical surface, Mean lesion maximum gradation value between twopoints on the diameter, and taking the sum of the mean gray value, and the mean grayvalue of all jaw teeth of the same position in the same plane, for the same method, taken asthe final results.Radio Visio Graphy (RVG):Between two points on the maximum diameterof the lesion relative to the mean bone mineral density and Alveolar Bone Mineral Densityof mean for the relative position between the two mean the same jaw teeth.Results:1. The use of CBCT measured bone mineral density of coronal section at differenttimes, measurements showed: Experimental group compared with different groups atdifferent time, results showed significant difference(P<0.01);The experimental group(0,3,6,9months) compared with the control group at the same time,results showedsignificant difference(P<0.01); the experimental group of12months compared to controlgroup, results showed no significant difference(P>0.05). 2. The use of CBCT measured bone mineral density of median sagittal section atdifferent times, measurements showed: Experimental group compared with differentgroups at different time, results showed significant difference(P<0.01);The experimentalgroup (0,3,6,9months) compared with the control group at the same time,results showedsignificant difference(P<0.01); the experimental group of12months compared to controlgroup, results showed no significant difference(P>0.05).3. RVG compared using different time measurement results:Experimental groupcompared with different groups at different time, results showed significantdifference(P<0.01);Experimental group of9months compared with experimental group of9months,results showed no significant difference(P>0.05);he experimental group (0,3,6months) compared with the control group at the same time,results showed significantdifference(P<0.01);the experimental group of9months and12months compared to controlgroup, results showed no significant difference(P>0.05).Conclusion:1. CBCT and RVG can measure bone mineral density of alveolar in apical, CBCTcan show bone destruction in the sagittal in apical RVG can not show bone destruction inthe sagittal in apical.2. After root canal therapy, bone mineral density of Chronic periapical teeth bonedensity occurs healed, lesions of bone mineral density after12months in general tended tobe normal.3. Cone-beam CT and RVG measurements of bone mineral density are safe, accurateand repeatable method, it can more accurately reflect the apical bone density changes.4. CBCT and RVG’s image analysis software technology monitor lesion area of bonemineral density in endodontics, root canal treatment of postoperative, have a certainreference value for the efficacy and prognosis of root canal therapy...