锥形束CT显像分析支抗种植体患者颧牙槽嵴区软硬结构的价值观察

目的探究锥形束CT(CBCT)显像分析在测量支抗种植体患者颧牙槽嵴区软硬组织结构中的应用价值。方法回顾性分析2018年12月至2019年12月于本院口腔科就诊并接受颧牙槽嵴区支抗种植体植入治疗的52例正畸患者的一般临床资料和CBCT影像学资料,患者颧牙槽嵴区支抗种植体植入角度、颊侧及腭侧骨厚度和骨皮质厚度,于不同冠状层面测量上颌窦底的角度。结果所有支抗种植体的平均植入角度为(28.41±8.67)°,不同性别、植入侧的支抗种植体植入角度无明显差异(P>0.05);支抗种植体的颊侧骨厚度为(2.53±0.86)mm,骨皮质厚度为(2.33±0.71)mm;腭侧骨厚度为(5.41±1.48)mm,骨皮质厚度为(1.51±0.43)mm。颊侧与腭侧的骨厚度、骨皮质厚度比较差异有统计学意义(P<0.05)。其中,不同性别、植入侧的支抗种植体颊侧及腭侧骨厚度、骨皮质厚度无明显差异(P>0.05);不同冠状层面上颌窦底角度比较差异有统计学意义(P<0.05)。结论支抗种植体周围的骨皮质量是保障术后初期稳定性的关键,不同层面上颌窦底的角度可反映上颌窦底形态,临床上应根据患者的上颌窦底形态差异决定支抗种植体的植入角度与深度,以降低上颌窦穿透的发生率。

Value of Cone-Beam CT Imaging in Analyzing the Soft and Hard Structures in Infrazygomatic Crest of Patients with Anchorage Implants

Objective To explore the application value of cone-beam CT(CBCT)imaging analysis in measuring the soft and hard tissue structures of infrazygomatic crest in patients with anchorage implants.Methods A retrospective analysis was performed on the general clinical data and CBCT imaging data of 52 orthodontic patients who were treated and underwent anchorage implants implantation of infrazygomatic crest in the dentistry department of the hospital from December 2018 to December 2019,including implantation angle of anchorage implant in infrazygomatic crest,the thickness of buccal and palatal bone and bone cortex,and angle of maxillary sinus bottom measured at different coronal levels.Results The average implantation angle of all anchorage implants was(28.41±8.67)°.There was no significant difference in the implantation angle in patients with different genders and anchorage implants at implantation sides(P>0.05).The buccal bone and bone cortex thickness values were(2.53±0.86)mm and(2.33±0.71)mm,respectively.The palatal bone and bone cortex thickness values were(5.41±1.48)mm and(1.51±0.43)mm,respectively.There were significant differences in the thickness of bone and bone cortex between buccal and palatal sites(P<0.05).There were no significant differences in the thickness of the buccal and palatal bone and bone cortex among patients with different genders and anchorage implants at implantation sides(P>0.05).There were significant differences in angle of maxillary sinus bottom at different coronal levels(P<0.05).Conclusion The quality of bone cortex around anchorage implants is the key to ensuring the early stability after surgery.The maxillary sinus bottom angle at different coronal levels can reflect the shape of maxillary sinus bottom.Clinically,implantation angle and depth of anchorage implants should be determined based on differences in the shape of maxillary sinus bottom to reduce the incidence of maxillary sinus penetration.