腺样体肥大患儿CBCT头影测量参数与口呼吸、睡眠呼吸暂停的关系OA

Objective:To explore the relationship between cone beam CT(CBCT)cephalometric parameters and mouth breathing and obstructive sleep apnea(OSA)in children with adenoidal hypertrophy.Methods:Totally 150 children with adenoidal hypertrophy were included from October 2021 to December 2024,and they were accompanied by different degrees of mouth breathing.According to the relevant standards of the guidelines,based on whether OSA occurred,the children were divided into simple group(n=84,without OSA)and concurrent OSA group(n=66,concurrent OSA),and 150 children who received physical examination during the same period were included in healthy group.CBCT examination was performed in all three groups,and the differences in the measurements of jaw and dental arch,tongue and hyoid bone,and airway were compared.Results:Compared with healthy group,the mandibular position posterior displacement(decreased SNB,P<0.05)and maxillary protrusion(increased ANB,P<0.05)occurred in children group,and the ANB in OSA group was significantly higher than that in simple group(5.38±0.60 vs.5.03±0.57,P<0.05),and SNB,nasal plane-frankfort horizontal plane angle(FH-NPo),gonial-pog distance(Go-Pog)were significantly higher than those in OSA group(75.32±1.53 vs.74.34±1.30,84.68±3.21 vs.82.88±2.68,56.84±2.57 vs.55.18±2.10,P<0.05).Hyoid posterior-inferior displacement(increased FH-H,P<0.05)and airway stenosis[nasopharyngeal volume(VN)decreased by 50.8%]were common in children group,and the velopharyngeal volume(VV)in OSA group was further reduced by 24.2%compared to simple group(P<0.05).Conclusion:CBCT effectively distinguishes simple adenoidal hypertrophy from OSA-combined cases through parameters such as ANB,SNB,and airway volume,indicating that mandibular retrusion and hyoid displacement are critical anatomical markers for OSA.