بررسي تاثير آماده سازي سطح ريشه با و بدون تتراسايكلين هيدروكلرايد بر ميزان پوشش ريشه توسط پيوند بافت همبندي آزاد تحت مخاطي پايه دار

Clinical evaluation of roof coverage by subpedicle connective tissue graft with and without tetracycline HCL root conditioning(Research )

Root conditioning treatmnt techniques (In vitro) has led to satisfactory results. Few clinical investigations has been conducted on this method combined with connective tissue graft. The purpose of this study was to clinically evaluate the mean root coverage with and without tetracycline HCL root conditioning with subpedicle connective tissue graft (SPCTG). 15 patients (mean age 48) with bilateral 30 Millerʹs class I gingival recessions participated. In each patient at random, one recession defect was treated with full thickness SPCTG procedure combined with tetracycline HCL root conditioning (test group) and the other recesion defect just received the SPCTG procedure (control group). Recession height (RH), recession width (RW), probing depht (PD), gingival width (GW), and clinical attachment level (CAL) were measured at baseline and 3 months postoperatively. Papillary width (PW) and height of osseous dehiscence (HOD) also were measured. Intra and inter group changes in these clinical parameters were analyzed statistically. Autocad software was used to measure the level of root coverage. The mean root coverage (RC) and mean surface coverage (SC) in test and control groups were 99%, 97%, 11.83 ± 2.62 mmz and 6.78 ± 1.36mm2 and the differences between two groups were significant (P<0.05). Complete RC in test and control groups were 86% and 53.3% respectively. The mean changes in RH, RW, GW and CAL in each group were significant (P <0.05). However, between two groups these changes were not significant (P>0.05) Reduction of PD in test group was not significant (P> 0.05) but in control group was significant (P<0.05). RH was directly correlated with the mean RC in both groups (P<0.05) The mean RW, HOD and PW were not correlated with mean RC in two groups (P>0.05). Reduction of sensitivity to air syringe in test group after surgery was significant (P<0.05) but in other group was not (P=ns). However sensitivity to explorer in both groups was reduced 3 months after surgery, the differences were not significant (P=ns). Better results in respect to mean RC, mean SC and also 86.7% RC in test group comparing to 53.3 in control group may be a reflection of desirable effects of tetracycline HCL root conditioning in these procedures and encourage other clinicians to apply this chemical substance.