下颌第三磨牙近中阻生患者垂直向咬合状况与TMD的关系探讨  

The investigation of the perpendicular occlusal condition of the mesially impacted mandibular third molars and its relationship with TMD

作　　者：王海涛 余敏[2] 王增全 涂少勤 吴斯媛 

机构地区：[1]佛山市口腔医院城南分院口腔综合科,广东佛山528000 [2]广州市红十字会医院口腔科 [3]佛山市口腔医院口腔正畸科

出　　处：《口腔疾病防治》2016年第2期94-97,共4页Journal of Prevention and Treatment for Stomatological Diseases

基　　金：广东省医学科研基金(2014A030313738)

摘　　要：目的探讨下颌第三磨牙近中阻生患者垂直向咬合情况与颞下颌关节紊乱病（temporomandibular joint disorders，TMD）的关系。方法选取37例下颌第三磨牙近中阻生患者纳入观察组，另选20例非下颌第三磨牙近中阻生的口腔疾病患者纳入对照组，评估其垂直向、颊舌向、近远中向咬合状况，运用AutoCAD软件进行下颌牙列Spee曲线测量。结果观察组TMD患病率（51．4％）显著高于对照组（15．0％）．差异具有统计学意义（χ^2=7．24，P=0．007）；观察组垂直向咬合异常率（40．5％）高于对照组（10．0％），差异有统计学意义（χ^2=5．79，P=0．056），观察组和对照组颊舌向、近远中向咬合异常率差异无统计学意义（P〉0．05）；观察组和对照组Spee曲线平均深度分别为（2．41±0．26）mm、（2．05±0．18）mm，观察组Spee曲线深度较对照组有增加，差异具有统计学意义（t=4．51，P=0．009）。结论下颌第三磨牙近中阻生患者TMD发生率高于非近中阻生患者；下颌第三磨牙近中阻生引发垂直向咬合异常。Objective To investigate the perpendicular occlusal condition of the mesiallv impacted mandibular third molars and its relationship with temporomandihular joint disorders （TMD）. Methods Thirty-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 hv AutoCAD software. Results Prevalenee 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 （χ^2 = 7.24, P = 0. 0071. Observation group＇s vertical abnormal occlusion rate （40.5%） was significantly higher than the control group （10.0%）. the differenee between the two groups was statistically signilficant （ 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 statistic.ally significant （t =4. 51, P =0. 009）. Conclusion Incidence of TMD in patients with mesially impaeted 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.

关 键 词：近中阻生下颌第三磨牙 颞下颌关节紊乱 Spee曲线 垂直向咬合异常 咬合指数 

分 类 号：R782.6[医药卫生—口腔医学]