Objective: This work aims to investigate the effect of stripping of steep sheep maxillary sinus by using 0.012 or 0.014 model new-type memory elastic silk sleeve stripper and umbrella stripper.
Methods: Goats with sinus floor gradients of 60° to 90° were selected by computed tomography of sheep head. A total of 72 animal models were established and randomized into three groups (n=24): group A (0.012 model), B (0.014 model) and C (umbrella stripper). Alveolar and maxillary sinus mucosa were stripped after crowning, and stripping length was measured when the stripping limit was reached or mucosal perforation occurred.
Results: The average stripping length of mucosa in group A was 11.3 mm±4.6 mm, and three cases experienced perforation of sinus floor mucosa. The average stripping length of mucosa in group B was 17.5 mm±5.0 mm, and one case experienced perforation of sinus floor mucosa. The average stripping length of mucosa in group C was 4.2 mm±1.3 mm, and four cases experienced perforation of sinus floor mucosa. The difference among the three groups was statistically significant (P<0.01) according to variance analysis. Moreover, the comparison between any two means was also statistically significant according to Dunnett's T3 test (P<0.05).
Conclusions: The new-type memory elastic silk sleeve stripper effectively stripped steep maxillary sinus mucosa. The 0.014 model exhibited superior peeling effect and was relatively safe.
目的 在陡峭羊上颌窦行经牙槽嵴顶的上颌窦底内提升术，使用0.012、0.014型号新型记忆弹性丝套管剥离器以及伞形剥离器剥离窦底黏膜，测量剥离长度，对比剥离效果。方法 经羊头颅计算机体层摄影选择窦底有60°~90°坡度的山羊，建立动物模型72个，并随机分成3组（n=24）：A（0.012型号）、B（0.014型号）、C（伞形剥离器）组。冲顶后行经牙槽嵴上颌窦底黏膜的剥离，待达到剥离极限或黏膜穿孔时测量剥离长度。结果 A组剥离黏膜的平均长度为11.3 mm±4.6 mm，3例出现上颌窦黏膜穿孔；B组剥离黏膜的平均长度为17.5 mm±5.0 mm，1例出现上颌窦黏膜穿孔；C组剥离黏膜的平均长度为4.2 mm±1.3 mm，4例出现上颌窦黏膜穿孔。经方差分析得3组总体均值不全相同（P<0.01），再通过Dunnett’s T3检验得出，3组剥离窦底黏膜长度的均数两两比较差异均有统计学意义（P<0.05）。结论 新型记忆弹性丝套管剥离器能够有效剥离陡峭的上颌窦底黏膜，而0.014型号剥离效果更好，且相对安全。.
Keywords: maxillary sinus; maxillary sinus bottom; new-type memory elastic silk sleeve stripper.