| Objective:Dynamic sonography is used to examine temporomandibular joints in normal volunteers and compared with patients with temporomandibular disorder(TMD)to investigate whether dynamic sonography could become a diagnostic TMD.Live,non-invasive imaging methods.Methods:1.Using the different probes of the ultrasonic diagnostic apparatus and different location of probes,20 normal young volunteers were examined by bilateral temporomandibular joint.The images of the static temporomandibular joint bone and the soft tissue structure were obtained.,and the dynamic sonography images were obtained at the opening and closing,observe the bilateral Whether the condylar movement trajectory is the same.By comparing the selected best imaging probe and the inspection position.2.Linear arry probe was used to examine the range of the bilateral level in 20 young patients with unilateral TMD symptoms,and there was compared with the normal group.3.Linear arry probe under the vertical position of normal group and TMD group in the closed position,opening degree 1.5cm(upper and lower central incisors vertical distance),opening degree 3.0cm(upper and lower central incisors vertical distance)to obtain static Images,Lateral capsule condyle distance(LCCD)were measured and the difference between the affected side and the healthy side of the TMD group was calculated.At the same time,the patient was examined with the Friction temporomandibular joint function scale to determine if there was a correlation betweenthe temporomandibular joint dysfunction index(DI)and the temporomandibular index(CMI)value.Results:1.The use of line array ultrasound probes for temporomandibular joint imaging is superior to convex array ultrasound probes.static examination of vertical position can better image the front and middle of TMJ.The level of dynamic ultrasound is better than that of the vertical position.2.In the normal group,the dynamic trajectory of the articular disc was consistent with that of the horizontal temporomandibular joint in the level of dynamic sonography.The images of the condylar were smooth,and the motion was smooth.The bilateral LCCD values were basically the same.In the TMD group,the distance LCCD distance of the affected side was greater than that of the contralateral side,and the not smooth showed some signs of condylar movement trajectory,the condylar movement trajectory was inconsistent,the articular disc image was unclear,and part of the condylar was dimness image.3.There was no significant difference in left and right LCCD values(P>0.05)between the normal group of the three degree of openings.There was a statistically significant difference between the intercuspal position and the 3.0 cm in the normal group of LCCD.(p<0.01),the LCCD value decreases when the opening degree is 3.0 cm.The LCCD values of the affected and contralateral sides in the patient group had statistically significant differences(P<0.01)and the values of the affected side were higher than those of the contralateral side in the three opening degree cases;the patient's healthy side LCCD values were intercuspal position and the opening degree was 3.0cm.There was no statistically significant difference in 3.0cm(P>0.05).4.Pearson correlation analysis showed that in the closed position,the difference between the affected side and the contralateral side LCCD was positively correlated with DI and CMI(r=0.51;r=0.47);when the mouth opening was 3 cm,the difference betweenthe affected side and the contralateral side LCCD was positively correlated with DI and CMI(r=0.48;r=0.53).At the opening of 1.5 cm,there was no significant correlation between the difference between the affected side and the contralateral side LCCD with DI and CMI.Conclusions:1.Dynamic ultrasonography can be used as an auxiliary examination method for clinical diagnosis of unilateral TMD patients,which has certain clinical guiding signifycance.2.The increase of LCCD value in patients with TMD has a positive correlation with the degree of temporomandibular joint dysfunction. |
PDF Full Text Request