自然牙牙裂综合征患者咬合类型调查

目的调查自然牙牙裂综合征(CTS)的牙合型特点。方法79例自然牙CTS患者及268名大学生,取研究模比较咬合类型。结果CTS组患牙分布:上颌第一磨牙23例,下颌第一磨牙14例,上颌第二磨牙12例,下颌第二磨牙11例,上颌第一前磨牙8例,上颌第二前磨牙7例,下颌第一前磨牙、下颌第二前磨牙、上颌第三磨牙、下颌第三磨各1例。与对照组相比,CTS组远中牙合、深覆牙合、深覆盖以及第三磨牙反牙合的比例增高,后牙锁牙合比例降低(P<0.05)。结论自然牙CTS患者远中牙合、深覆牙合、深覆盖以及第三磨牙反牙合的比例明显增高。

Survey on occlusion pattern in patients with cracked tooth syndrome of natural tooth

Objective To investigate the features of the occlusion pattern in patients with cracked tooth syndrome(CTS).Methods 79 CTS patients(CTS Group) during the period from September 2004 to April 2005,and 268 university student volunteers(Control Group) were included.Study casts were obtained for all 347 participants and occlusion patterns were compared.Results ①Distribution of teeth suffered from CTS in CTS group,of which 23 were maxilary first molars,14 mandibular first molars,12 maxillary second molars,11 mandibular second molars,8 maxillary first premolars,7 maxillary second premolars,1 mandibular first premolar,mandibular second premolar,mandibular third molar and maxilary third molar,respectively.②Compared with control group,the ratios of anterior deep over-bite,deep over-jet,distocclusion and the third molar cross-bite were higher in CTS Group(P<0.05) while the ratio of posterior reversal cross-bite was lower in CTS Group(P<0.05).Conclusion The ratios of distocclusion,anterior deep over-jet,deep over-bite and the third molar cross-bite were higher in CTS patients.