摘要
目的 探讨不同类型错畸形的替牙列期儿童颅-颌骨形态及牙弓形态差异性.方法 回顾性选取2019年1月至2023年5月在安徽医科大学附属宿州医院(宿州市立医院)口腔科就诊的替牙列期错矜畸形儿童100例作为研究对象,根据ANB角等进行分类,其中Ⅰ类、Ⅱ类和Ⅲ类患儿分别为34例、35例、31例.比较不同类型患儿头颅侧位X线[前颅底长度、上颌长、下颌长、下前牙唇倾度、蝶鞍中心与鼻根点及上牙槽座点所构成的角(SNA)、蝶鞍中心与鼻根点及下齿槽座点所构成的角(SNB)]及模型差异(牙弓宽度、牙弓长度及腭穹隆坡度),以及不同性别间的差异.结果 Ⅲ类错畸形患儿上颌长、下前牙唇倾度和SNA分别为(37.80±3.50)mm、(85.03±4.06)°和(75.56±2.14)°,明显低于 Ⅰ 类[(43.01±2.91)mm、(93.20±4.45)°、(79.15±2.20)°]和Ⅱ类[(42.97±3.10)mm、(97.01±3.11)°、(82.10±2.06)°]患儿,差异有统计学意义(P＜0.05);Ⅱ类错畸形患儿下颌骨长和SNB分别为(89.97±3.11)mm和(74.03±2.30)°,均明显低于 Ⅰ 类[(93.10±3.41)mm、(77.56±2.11)°]和 Ⅲ 类[(93.06±3.11)mm、(77.70± 2.19)°]患儿,差异均有统计学意义(P＜0.05).不同性别Ⅰ类、Ⅱ类、Ⅲ类错畸形患儿的前颅底长度、下颌骨长、下前牙唇倾度、SNB比较,差异均无统计学意义(P＞0.05);男童Ⅰ类、Ⅱ类、Ⅲ类错畸形患儿的上颌长和SNA均显著高于女童,差异均有统计学意义(P＜0.05).Ⅲ类错畸形患儿上牙弓长为(23.84±1.11)mm,明显短于Ⅰ类[(25.80 ±1.20)mm]和Ⅱ类[(25.71±1.31)mm]患儿,差异有统计学意义(P＜0.05).不同性别的Ⅰ类、Ⅱ类、Ⅲ类错畸形患儿牙弓形态比较,差异均无统计学意义(P＞0.05).结论 不同类型错畸形的替牙列期儿童颅-颌骨形态及牙弓形态存在差异,对早期识别及干预有重要参考意义.
Abstract
Objective To explore the differences of cranio jaw morphology and dental arch morphology in different types of malocclusion children in transitional dentition.Methods retrospective research method were used,100 children with occlusal malocclusion in transitional den-tition diagnosed in Department of Stomatology,Anhui Medical University Affiliated Suzhou Hospital,Suzhou Municipal Hospital from January 2019 to May 2023 were selected,according to classified ANB Angle,etc,among them,Class Ⅰ,Ⅱ and Ⅲ children were 34 cases,35 cases and 31 cases,the lateral cranial X-rays of different types of pediatric children[skull base length,maxillary length,mandibular length,lower anterior lip inclination,angle formed by the center of the sphenoid amine,nasal root point,and upper alveolar seating point(SNA),and angle formed by the center of the saddle nasal root point and lower alveolar seating point(SNB)]and model differences(arch width,arch length,and palatal arch slope),as well as differences between genders were compared.Results The length of maxilla,labial inclination of lower anterior teeth and SNA of children with Class Ⅲ malocclusion were(37.80±3.50)mm,(85.03±4.06)° and(75.56±2.14)°,respectively,which were signifi-cantly lower than those of children with class Ⅰ[(43.01±2.91)mm,(93.20±4.45)°,(79.15±2.20)°]and Class Ⅱ[(42.97±3.10)mm,(97.01±3.11)°,(82.10±2.06)°],the differences were statistically significant(P＜0.05);the length of mandible and SNB in chil-dren with Class Ⅱ malocclusion were(89.97±3.11)mm and(74.03±2.30)°,respectively,which were significantly lower than those in chil-dren with class Ⅰ[(93.10±3.41)mm,(77.56±2.11)°]and Class Ⅲ[(93.06±3.11)mm,(77.70±2.19)°],the differences were sta-tistically significant(P＜0.05).There were no statistically significant differences in the length of the anterior skull base,length of the mandible,inclination of the lower anterior teeth,and SNB between children with Class Ⅰ,Ⅱ and Ⅲ malocclusion of different genders(P＞0.05);the maxillary length and SNA of children with Class Ⅰ,Ⅱ and Ⅲ occlusal malocclusion in boys were significantly higher than those in girls,and the differences were statistically significant(P＜0.05).The length of maxillary arch in children with Class Ⅲ malocclusion was(23.84±1.11)mm,which was significantly shorter than those in children with Class Ⅰ[(25.80±1.20)mm],and Class Ⅱ[(25.71±1.31)mm],and the difference was statistically significant(P＜0.05).There were no statistically significant differences in dental arch morphology among children with Class Ⅰ,Ⅱ and Ⅲ malocclusion of different genders(P＞0.05).Conclusion Different types of malocclusion of children in transitional dentition have different cranio jaw morphology and dental arch morphology,which are important for early recognition and intervention.
基金项目
安徽省重点研发计划(201904a07020036)
万方数据