小剂量多西环素治疗慢性牙周炎的疗效和对基质金属蛋白酶8的影响

目的 探讨小剂量多西环素(LDD)对慢性牙周炎的临床疗效.方法 20例慢性牙周炎患者,均予洁刮治和根面平整术(SRP)治疗,并按随机数字表随机分为LDD和安慰剂2组,各10例.LDD组口服盐酸多西环素片,安慰剂组口服安慰剂,3个月为1个疗程.分别在治疗前和治疗后3、6、9、12个月时检测2组患者的菌斑指数、牙龈指数、探诊深度、附着丧失、龈沟液量及龈沟液中基质金属蛋白酶8(MMP-8)水平,并对2组结果 进行统计学分析.结果 与治疗前比较,治疗后2组菌斑指数、牙龈指数、探诊深度、附着丧失均明显改善,龈沟液量明显减少,MMP-8水平均下降(P＜0.05).与安慰剂组比较,LDD组的龈沟液量和MMP-8治疗后6个月下降明显(0.13±0.02)μl比(0.29±0.02)μl;(3.7±3.2)ng/30 s比(12.3±4.1)ng/30 s,P＜0.05],牙龈指数、探诊深度在治疗后9、12个月改善更为明显(0.65±0.25)比(1.25±0.13);(0.70±0.24)比(1.20±0.18);(2.54±0.18)mm比(3.22±0.12)mm;(2.25±0.17)m比(3.18±0.13)mm],差异均有统计学意义(均P＜0.05).结论 牙周基础治疗联合小剂量多西环素,能明显改善慢性牙周炎患者的临床症状,而这与其能降低龈沟液中MMP-8水平有关.

Abstract：

Objective To investigate the effect of low-dose doxycycline(LDD)on the level of gingival crev icular fluid(GCF) matrix metalloproteinases-8 ( MMP-8 ) in chronic periodontitis. Methods Twenty patients with chronic periodontitis were selected and randomly divided into two groups( n = 10 in each group). After scaling and root planning( SRP), the SRP + LDD group received LDD for 3 months, whereas the SRP + P group received placebo 3 months. The patients were evaluated every 3 months during the 12-month study period. The plaque index( PLI), gingival index( GI), probing depth( PD), attachment loss(AL) and GCF samples were collected at each visit. The level of MMP-8 were detected and analyzed. Results Compared to baseline, the scores of PLI, GI, PD, AL and MM P-8 of the two groups showed statistically improvement during the 12-month study period (P ＜ 0.05 ). Compared to the SRP + P group, the SRP + LDD group showed statistically differences of GI, PD at 9,12-month visit. Conclu sion Adjunctive SDD therapy can improve the clinical parameters and this clinical improvement is reflected by level of MMP-8 in chronic periodontitis after the therapy.

Effect of low-dose doxycycline on the level of gingival crevicnlar fluid matrix metalloproteinases-8 in chronic periodontitis

Objective To investigate the effect of low-dose doxycycline(LDD)on the level of gingival crev icular fluid(GCF) matrix metalloproteinases-8 ( MMP-8 ) in chronic periodontitis. Methods Twenty patients with chronic periodontitis were selected and randomly divided into two groups( n = 10 in each group). After scaling and root planning( SRP), the SRP + LDD group received LDD for 3 months, whereas the SRP + P group received placebo 3 months. The patients were evaluated every 3 months during the 12-month study period. The plaque index( PLI), gingival index( GI), probing depth( PD), attachment loss(AL) and GCF samples were collected at each visit. The level of MMP-8 were detected and analyzed. Results Compared to baseline, the scores of PLI, GI, PD, AL and MM P-8 of the two groups showed statistically improvement during the 12-month study period (P ＜ 0.05 ). Compared to the SRP + P group, the SRP + LDD group showed statistically differences of GI, PD at 9,12-month visit. Conclu sion Adjunctive SDD therapy can improve the clinical parameters and this clinical improvement is reflected by level of MMP-8 in chronic periodontitis after the therapy.