Department of Stomatology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, No.168 of Litang Road, Changping District, Beijing, 102218, China.
Department of Stomatology, Beijing Huairou Hospital, Beijing, 101400, China.
BMC Oral Health. 2023 Apr 14;23(1):215. doi: 10.1186/s12903-023-02931-1.
To study the airway changes of edentulous patients with a magnitude of long centric (MLC) ≥ 1.5 mm during occlusal reconstruction at the centric relation position (CRP) and muscular position (MP).
The CRP and MP were determined by Gothic arch. The cephalometric analysis was taken at the two occlusal positions. The sagittal distance of each part of the upper airway was measured. The differences between two occlusal positions were compared. The difference values were calculated by subtracting the two. The correlation between the MLC and the difference value was analyzed.
The sagittal diameters of palatopharynx and glossopharynx airway at MP were statistically larger than those at CRP (P < 0.05). The MLC had a strong correlation with the ANB angle (r = 0.745, P < 0.001).
Compared with the occlusal position of CRP, occlusion reconstruction at MP can provide better airway condition for edentulous patients with large MLC.
研究在正中关系位（centric relation position，CRP）和肌肉位（muscular position，MP）进行咬合重建时，具有 1.5mm 以上的大正中矢状面距离（magnitude of long centric，MLC）的无牙颌患者的气道变化。
通过哥特式弓确定 CRP 和 MP。在两个咬合位进行头影测量分析。测量上气道各部分的矢状距离。比较两个咬合位之间的差异。通过相减计算差值。分析 MLC 与差值之间的相关性。
MP 时腭咽和舌咽气道的矢状径明显大于 CRP（P<0.05）。MLC 与 ANB 角呈强相关（r=0.745，P<0.001）。
与 CRP 的咬合位相比，MP 时的咬合重建可为具有较大 MLC 的无牙颌患者提供更好的气道条件。
