利用锥形束CT(CBCT)扫描成像,对不同矢状骨面型患者上颌骨尖牙窝区解剖结构进行测量分析;在前磨牙区模拟植入不同直径的种植体,测量不同骨面型尖牙窝、种植体的相关数据,分析两者位置关系.Ⅰ类、Ⅱ类、Ⅲ类面型患者第一前磨牙区尖牙窝骨倒凹深度分别为(4.33±0.73)、(3.77±0.58)、(5.18±0.93)mm,第二前磨牙区尖牙窝骨倒凹深度分别为(3.20±0.63)、(2.81±0.58)、(3.90±0.79)mm.性别、左右及是否缺牙的差异均无统计学意义;3种面型患者骨倒凹差异均有统计学意义(P<0.05).第一前磨牙存在时发生唇侧穿孔时种植体长度为(10.30±1.70)mm(d=3.3 mm)、(8.77±1.58)mm(d=4.1 mm),第二前磨牙存在时发生唇侧穿孔时种植体长度为(8.09±1.51)mm(d=3.3 mm)、(6.69±1.35)mm(d=4.1 mm);第一前磨牙缺失时发生唇侧穿孔时种植体长度为(8.98±1.54)mm(d=3.3 mm)、(7.67±1.52)mm(d=4.1 mm),第二前磨牙缺失时发生唇侧穿孔时种植体长度为(7.09±1.59)mm(d=3.3 mm)、(5.79±1.34)mm(d=4.1 mm),是否缺牙差异有统计学意义(P<0.05).在上颌尖牙窝区进行种植手术,尤其Ⅲ类骨面型患者,术前通过CBCT分析尖牙窝与种植体的位置关系,避免唇侧穿孔,保证种植体的三维植入方向.%Cone-beam computed tomography(CBCT) was used to analyze the anatomic morphology of maxillary canine fossa of different sagittal skeletal patterns patients;implants of various dimensions were virtually placed into the maxillary premolars region.The relationships among maxillary canine fossa and implant were analyzed.The depth of the maxillary canine fossa was(4.33±0.73),(3.77±0.58),(5.18±0.93)mm in the 1st premolar region of class Ⅰ,Ⅱ and Ⅲ respectively.The depth of the maxillary canine fossa was(3.20±0.63),(2.81±0.58),(3.90±0.79)mm in the 2nd premolar region of class Ⅰ,Ⅱ and Ⅲ respectively.There were no significant statistical differences in genders,sides,and loss of tooth.And there were significant statistical differences in three classes(P<0.05).The length of the implants was (10.30±1.70)mm(d=3.3 mm) and (8.77±1.58)mm(d=4.1 mm) in the 1st premolar region and (8.09±1.51)mm(d=3.3 mm),(6.69±1.35)mm(d=4.1 mm) in the 2nd premolar region in patients with teeth and buccal perforation;the length of the implants was (8.98±1.54)mm(d=3.3 mm) and (7.67±1.52)mm(d=4.1 mm) in the 1st premolar region and(7.09±1.59)mm(d=3.3 mm) and (5.79±1.34)mm(d=4.1 mm) in the 2nd premolar region in patients with tooth loss,respectively.There were significant statistical differences in loss of tooth(P<0.05).Analyzing of spatial relationships among maxillary canine fossa and implants of different sagittal skeletal patterns patients especially class Ⅲ patients,by using CBCT has important significance in guiding dental implants.
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