RESUMO
Objective To analyze the contrast agent back flow,balloon ejection and pain which appeared during the examination process,and define the advantages and disadvantages of different rates of high pressure injector to take hysterosalpingography (HSG) examination.Methods 229 patients who took HSG examination in our department were divided into two groups randomly.The rate of conventional group was 0.3 mL/s,and low rate group was 0.15 mL/s.The contrast agent back flow,balloon ejection and pain which appeared on the examined patients of two groups were recorded.T test was adopted to compare the age difference of two groups.χ2 test was used to compare the differences of diagnosis results,contrast agent back flow and balloon ej ection of two groups.Wilcoxon rank sum test was used to compare the pain difference of two groups.Results Two groups had no significant differences on age, diagnosis results and contract agent back flow (t=1.237,χ2=0.004,χ2=1.521,P>0.05).Balloon ejection of two groups had significant difference(χ2=17.319,P<0.05).The appeared pain of two groups had significant difference (U=-2.337,P<0.05).Conclusion Using high pressure injector to inject contrast agent with low flow rate is better for HSG.
RESUMO
Objective To analyze the contrast agent back flow,balloon ejection and pain which appeared during the examination process,and define the advantages and disadvantages of different rates of high pressure injector to take hysterosalpingography (HSG) examination.Methods 229 patients who took HSG examination in our department were divided into two groups randomly.The rate of conventional group was 0.3 mL/s,and low rate group was 0.15 mL/s.The contrast agent back flow,balloon ejection and pain which appeared on the examined patients of two groups were recorded.T test was adopted to compare the age difference of two groups.χ2 test was used to compare the differences of diagnosis results,contrast agent back flow and balloon ej ection of two groups.Wilcoxon rank sum test was used to compare the pain difference of two groups.Results Two groups had no significant differences on age, diagnosis results and contract agent back flow (t=1.237,χ2=0.004,χ2=1.521,P>0.05).Balloon ejection of two groups had significant difference(χ2=17.319,P<0.05).The appeared pain of two groups had significant difference (U=-2.337,P<0.05).Conclusion Using high pressure injector to inject contrast agent with low flow rate is better for HSG.
RESUMO
<p><b>OBJECTIVE</b>This study aimed to detect the immunoexpression of interleukin-21 (IL-21) and receptor activator. of nuclear factor KB ligand (RANKL) in periapical granulomas (PGs) and radicular cysts (RCs). The interaction of IL-21 with RANKL and its role in periapical pathogenesis were also speculated.</p><p><b>METHODS</b>A total of 32 PGs and 23 RCs were selected as experimental samples. Lesion size and occurrence of tenderness were recorded. Up to 10 healthy gingival tissues were collected as normal control samples. All tissues were subjected to immunohistocheincal analysis with anti-human IL-21 and RANKL polyclonal antibodies. The correlations of IL-21 with RANKL, lesion size, and the occurrence of tenderness of the PGs and RCs were evaluated.</p><p><b>RESULTS</b>IL-21-positive cells were detected in all periapical lesion tissues but not in normal tissues. In the cyst group and granuloma group, the corresponding expression levels of IL-21 were 59.92±6.57 and 36.80± 6.81, whereas those of RANKL were 68.81±18.59 and 36.12±14.87, respectively. Moreover, t-test revealed a significantly higher expression of IL-21 and RANKL in RCs than in PGs (P<0.05). IL-21 and RANKL were positively correlated in both PGs and RCs (P<0.05). Furthermore, IL-21 was correlated with lesion size (P<0.05).</p><p><b>CONCLUSION</b>This study demonstrated that IL-21 is potentially involved in the pathogenesis of apical periodontitis lesions. A role in the exacerbation of chronic inflammation, as well as in bone resorption, is suspected. Further studies are required to elucidate the specific functions of IL-21 in periradicular inflammatory processes.</p>