Measurement & Analysis Of ALP And AST Activity Levels In Gingival Cervical Fluid Of Telescope Retained Fixed Bridge

Objective:The periodontal variations of telescope retained fixed bridge are monitored and the effects of the bridge on periodontal condition are researched and discussed by observing periodontal variations and by measuring and comparing gingival index, sulcus bleeding index and ALP and AST activity levels in gingival cervical fluid between telescope retained fixed bridge and traditional fixed bridge in different periods.Methods:(1) In accordance with the choosing criteria,16 patients, each with symmetrical missing of the first molar of mandibular and with the second premolar and the second molar teeth of as mandibular as the abutment, were chosen. (2) The selected 16 patients with 64 abutment tooth were divided into experimental and comparative groups, each with 32 abutments. The abutments on both sides of each patient were classified into experimental and comparative groups at random, the abutments in experimental group were repaired by telescope retained fixed bridge, while that in comparative group by traditional fixed bridge. (3) The gingival index and sulcus bleeding index of abutments in both groups were tested and ALP and AST activity levels in gingival cervical fluid tested by automatic biochemistry analyzer immediately after the repairing and in 6 and 12 months respectively. The testing data were analyzed by SPSS12.0 statistical software to assess the periodontal status in different parts of abutments at various periods.Results:Dentures for all selected patients are manufactured, adopted and tested in accordance with the requirements. (1) Statistical analysis showed that:SBI and GI in comparative group had increasing trend, but without statistical difference in 6 months (P>0.05) and with the difference in 12 months (P<0.05); both indexes in experimental group also had the trend, but without the statistical difference in both 6 and 12 months (P>0.05). The statistical analysis also showed that: both GI and SBI between experimental and comparative groups showed no significant differences immediately after repairing and in 6 months (P>0.05) and showed obvious difference in 12 months (P<0.05). (2) Both ALP and AST activity levels in gingival cervical fluid after denture restoration showed gradually increasing trend and decreased immediately after scaling in 6 months, but no significant different between telescope retained fixed bridge and traditional fixed bridge (P>0.05); however, both indexes in experimental group showed decreasing trend compared and significant difference with that of comparative group (P<0.05) in 12 months. The periodontal indexes and activity levels of both restoration methods showed same variation trend.Conclusion:Telescope retained fixed bridge, by means of regular removing and scaling, can keep the periodontal tissue of abutments in clean and healthy status.