@article{WANG2016, 
author = {Hai-tao WANG and Min YU and Zeng-quan WANG and Shao-qin TU and Si-yuan WU},
title = {The investigation of the perpendicular occlusal condition of the mesially impacted mandibular third molars and its relationship with TMD},
year = {2016},
journal = {Journal of Prevention and Treatment for Stomatological Diseases},
volume = {24},
number = {2},
pages = {94-97},
keywords = {Mesially impacted mandibular third molar, Temporomandibular joint disorders, Spee curve, Vertical abnormal occlusion, Occlusion index},
url = {https://www.sciopen.com/article/10.12016/j.issn.2096-1456.2016.02.006},
doi = {10.12016/j.issn.2096-1456.2016.02.006},
abstract = {ObjectiveTo investigate the perpendicular occlusal condition of the mesially impacted mandibular third molars and its relationship with temporomandibular joint disorders (TMD).MethodsThirty-seven cases of mesially impacted mandibular wisdom teeth were selected as the observation group, and 20 cases of other oral diseases without the mesially impacted third molars were selected as the control group from Jun 2012 to Sep 2014. Occlusion in the vertical, buccal-lingual and mesial-distal directions were analyzed with occlusion index. Depth of Spee curve was measured by AutoCAD software.ResultsPrevalence of TMD of observation group (51.4%) was significantly higher than the control group (15.0%), the difference between the two groups was statistically significant (χ2=7.24, P=0.007). Observation group's vertical abnormal occlusion rate (40.5%) was significantly higher than the control group (10.0%), the difference between the two groups was statistically significant (P<0.05). Average depth of Spee curve in observation group and control group were (2.41±0.26) mm and (2.05±0.18) mm respectively, the difference was statistically significant (t=4.51, P=0.009).ConclusionIncidence of TMD in patients with mesially impacted mandibular wisdom tooth is higher than that of patients without mesially impacted mandibular wisdom tooth. Mandibular impacted wisdom tooth may cause vertical abnormal occlusion. TMD is related to vertical abnormal occlusion.}
}