| Objective: Based on this study without the orthodontic treatment of adolescents with 6 to 18 patients with osseous class ? and class ? high and low Angle of CBCT(cone beam computed tomgrahhy)digital imaging data reconstruction,in the temporomandibular joint fossa and its related measure anatomical structure analysis,and on patients with osseous class ? and class ? high and low Angle of the temporomandibular joint fossa position and form of the difference,It provides a certain clinical reference for the occurrence mechanism,clinical diagnosis,treatment plan formulation and correction plan selection of malocclusion in patients with class ? and ? bone malocclusion of high and low Angle.Methods: The data of this study were selected from the Dicom file database of patients admitted to the department of orthodontics of tianjin university of medical science and dentistry from June 2010 to February 2018.Data of 150 patients aged 6-18 years old with malocclusion were selected,half male and half female,and the average age of the patients was 12 2.13 years old.Using Invivo5 3 d reconstruction software will Dicom files for 3 d reconstruction,construct a three dimensional reference plane,according to ANB Angle,FMA and SN-MP Angle research object can be divided into osseous type I Angle,osseous class ? high Angle group,osseous ? low-angle group,osseous class ? high Angle,osseous class ? low-angle group,and the temporomandibular joint fossa and its related analysis of three-dimensional anatomical structure index measurement.SPSS22.0 and independent sample t test were used to analyze and discuss the measured data.Result: 1.This study compared patients with osseous class ? high Angle of patients with osseous type I have Angle of the temporomandibular joint fossa and relevant anatomy fixed-point measurement data,the result shows that the temporomandibular joint nest peak to the former nasal crest point distance,maxillary tuberosity lows to before and after nasal crest point and the distance from the point of the sella,temporomandibular joint nest nasal crest after the last point to point distance,articular tubercle nadir,temporomandibular joint nest last point to the point of the horizontal distance of the sella,temporomandibular joint nest sagittal to length difference is no statistical significance(p > 0.05).The distance from the last point of the temporomandibular joint fossa to the anterior nasal crest and the sphenoid saddle,and the distance from the highest point of the temporomandibular joint fossa and the lowest point of the joint node to the SN plane were statistically significant(P < 0.05).The distance from the highest point of the temporomandibular joint fossa to the posterior nasal crest and the sphenoid saddle point,the horizontal distance from the highest point of the temporomandibular joint fossa to the saddle point,the distance from the last point of the temporomandibular joint fossa to the SN plane,and the Angle between the highest point of the temporomandibular joint fossa and the plane connecting the sphenoid saddle point and the SN plane were significantly different(P < 0.01).2.This study compared patients with osseous class ? low Angle and osseous class I patients with Angle of the temporomandibular joint fossa and related anatomic structure after fixed-point measurement data,the result shows that the temporomandibular joint nest peak,joint tubercle lows,temporomandibular joint nest nasal crest before the last point to point distance,articular tubercle nadir,temporomandibular joint nest nasal crest after the last point to point distance,articular tubercle nadir,temporomandibular joint nest last point to point distance of the sella,temporomandibular joint nest peak,joint nodules lows,temporomandibular joint nest last point and SN plane distance,The sagittal distance between the highest point of temporomandibular joint fossa,the lowest point of joint nodule,the last point of temporomandibular joint fossa and the saddle point,and the difference in the sagittal length of temporomandibular joint fossa was not statistically significant(p > 0.05).The distance between the highest point of the temporomandibular joint fossa and the saddle point was statistically significant(p < 0.05).The distance between the highest point of the temporomandibular joint fossa and the posterior nasal crest,and the Angle between the highest point of the temporomandibular joint fossa and the plane connecting the saddle point and the SN plane were significantly different(p < 0.01).3.The study compared patients with osseous class ? high Angle and Angle of osseous type I have patients with TMJ nest and relevant anatomy fixed-point measurement data,the result shows that the temporomandibular joint nest peak,joint tubercle lows,temporomandibular joint nest last points respectively to before and after nasal crest point distance,joint nodules under the most point,temporomandibular joint nest last point to the distance to the point of the sella sagittal difference has no statistical significance(p > 0.05).The distance between the last point of the temporomandibular joint fossa and the sphenoid saddle point,the distance between the highest point of the temporomandibular joint fossa and the last point of the temporomandibular joint fossa and the SN plane were statistically significant(p < 0.05).Temporomandibular joint nest peak,joint tubercle lows the distance to the point of the sella,temporomandibular joint nest peak to the distance to the point of the sella sagittal,joint nodules under the most points to SN plane distance,temporomandibular joint nest sagittal to length,the temporomandibular joint litter of highest point and the point of attachment of the sella plane and SN plane into Angle have significant difference(p < 0.01).4.This study compared patients with osseous class ? low Angle of patients with osseous type I have Angle of the temporomandibular joint fossa and relevant anatomy fixed-point measurement data,the result shows that the temporomandibular joint nest on most points,joint nodules most,temporomandibular joint nest last points respectively to nasal crest before and after nasal crest point,the point of the sella,SN plane distance,nest in temporomandibular joint(TMJ)under the most points,joint nodules on point,temporomandibular joint nest last point to the distance to the point of the sella sagittal difference has no statistical significance(p > 0.05)the temporomandibular joint nest to the length of the sagittal statistically significant(p < 0.05).The angles of the plane connecting the highest point of the temporomandibular joint fossa with the saddle point and the SN plane were significantly different(p < 0.01).5.This study compared patients with osseous class ? high Angle and osseous class ? patients with low Angle of the temporomandibular joint fossa and related anatomic structure after fixed-point measurement data,the result shows that the temporomandibular joint nest peak,joint nodules before nadir to nasal crest point distance,articular tubercle nadir,temporomandibular joint nest nasal crest after the last point to point distance,articular tubercle nadir,temporomandibular joint nest high distance to the point of the sella and sagittal to the distance,the temporomandibular joint litter of highest point and the point of attachment of the sella plane and SN plane into the Angle difference is no statistical significance(p > 0.05).The difference in the sagittal length of the temporomandibular joint fossa between the last point of the temporomandibular joint fossa and the anterior nasal crest,and the distance between the last point of the joint nodule and the SN plane was statistically significant(p < 0.05).The distances from the highest point of the temporomandibular joint fossa to the posterior nasal crest and the sphenoid saddle point,the sagittal distances from the highest point of the temporomandibular joint fossa to the saddle point,and the distances from the highest point of the temporomandibular joint fossa and the last point of the temporomandibular joint fossa to the SN plane were significantly different(p < 0.01).6.This study compared patients with osseous class ? high Angle of patients with osseous class ? low Angle of the temporomandibular joint fossa and related anatomic structure after fixed-point measurement data,the result shows that the temporomandibular joint nest peak,joint tubercle lows,temporomandibular joint nest nasal crest before and after the last point to point distance,articular tubercle nadir,temporomandibular joint nest last point to the distance to the point of the sella sagittal,temporomandibular joints,temporomandibular joint nest nest apogee finally points to SN plane distance,temporomandibular joint litter of highest point and the point of attachment of the sella plane and SN plane into the Angle difference is no statistical significance(p > 0.05).The distance from the last point of TMJ to the saddle point,the sagittal distance from the highest point of TMJ fossa to the saddle point,and the distance from the lowest point of TMJ fossa to the SN plane were statistically significant(p < 0.05).The distance from the highest point of the temporomandibular joint fossa,the lowest point of the joint nodule to the sphenoid saddle point,and the sagittal length of the temporomandibular joint fossa were significantly different(p < 0.01).7.The study compared patients with osseous class ? high Angle of patients with osseous class ? high Angle of the temporomandibular joint fossa and relevant anatomy fixed-point measurement data,the result shows that the temporomandibular joint nest peak,joint tubercle lows to nasal crest point distance,before the temporomandibular joint,temporomandibular joint nest nest apogee last point to point distance of the sella,temporomandibular joint nest peak to the distance to the point of the sella sagittal,temporomandibular joint nest highest point and the distance from the last point to SN plane difference has no statistical significance(p > 0.05).The distance from the lowest point of the joint node to the posterior nasal crest,the sagittal distance from the lowest point of the joint node,the last point of the temporomandibular joint fossa to the sphenoid saddle,and the distance difference between the lowest point of the joint node and the SN plane were statistically significant(p < 0.05).The distance from the topmost point of the temporomandibular joint fossa to the posterior nasal crest,the distance from the lowest point of the joint node to the sphenoid saddle,the distance from the last point of the temporomandibular joint to the anterior nasal crest,the sagittal length of the temporomandibular joint fossa,and the Angle of the plane connecting the topmost point of the temporomandibular joint fossa to the saddle point and the SN plane were significantly different(p < 0.01).8.This study compared the osseous ? class low Angle of patients with osteoarthritis patients with class ? low Angle the temporomandibular joint fossa and related anatomic structure after fixed-point measurement data,the result shows that the temporomandibular joint nest peak,joint tubercle lows,temporomandibular joint nest nasal crest before the last point to point distance,articular tubercle most point to after nasal crest point distance,under the joint nodules under the point,the temporomandibular joint nest last point to point distance of the sella,temporomandibular joint nest under the most points,joint nodules on point,temporomandibular joint nest last point to the distance to the point of the sella sagittal,There was no statistically significant difference in the distance between the lowest point of the joint node and the SN plane(p > 0.05).The distance between the highest point of the temporomandibular joint fossa and the sphenoid saddle point,the distance between the last point of the temporomandibular joint fossa and the posterior nasal crest point,and the distance between the highest point of the temporomandibular joint fossa and the last point of the temporomandibular joint fossa and the SN plane were statistically significant(p < 0.05).The distance from the highest point of the temporomandibular joint fossa to the posterior nasal crest,the sagittal length of the temporomandibular joint fossa,and the Angle of the plane connecting the highest point of the temporomandibular joint fossa to the saddle point and the SN plane were significantly different(p < 0.01).Conclusion: 1.The position,shape and position of temporomandibular joint fossa in patients with bone type ? and type ? high and low Angle are correlated with sagittal and vertical bone plane.2.The temporomandibular joint fossa bone type ? is located farther and middle than the bone type ?.3.The temporomandibular joint fossa of patients with bone type ? high horn is closer to the skull base than the temporomandibular joint fossa of patients with bone type ? low horn.4.In patients with bone type ? high Angle and low Angle,compared with patients with bone type ? high Angle and low Angle,the temporomandibular joint fossa with high Angle is closer to the skull base than that with low Angle.5.The sagittal length of temporomandibular joint fossa in patients with bone type ? high Angle is larger than that in patients with low Angle.6.The temporomandibular fossa of patients with bone ? has a greater sagittal length than that of patients with bone ?. |
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