Effectiveness of three auxiliary irrigation methods for cleaning the internal walls of root canals of curved isolated teeth / 华西口腔医学杂志

OBJECTIVES@#This study aimed to compare the effectiveness of ultrasound and acoustic and laser cleaning of curved root canals.@*METHODS@#A total of 92 molars with independent root canals with a curvature of 20°-40° were prepared and standardized at 04 25# and stained with gentian violet solution for 72 h. Among them, 52 were randomly divi-ded into four groups for final rinsing (n=13): NI group, PUI group, EDDY group, and PIPS group. Ten samples in each group were cut horizontally along the long axis perpendicular to the root and divided into curved upper, curved, and apical segments. Images were taken with a stereomicroscope and Image J measurements were taken to calculate the depth of rinse penetration. The remaining three samples from each group were split along the long axis of the dentin, photographed by scanning electron microscope to record the dentin tubule exposure and staining layer, and scored for staining layer by double-blind method. SPSS 26.0 software was used to perform statistical analysis and select the best flushing method. An extra 40 samples were randomly divided into four groups for detection of flushing fluid penetration depth (n=10): 10, 20, 30, and 40 s.@*RESULTS@#In the upper part, the mean depth of infiltration was not significantly different between the experimental and control groups (P>0.05). The PIPS group had a significantly lower smear layer score than the control group and the EDDY group (P<0.01). In the curved segment, the mean depth of infiltration was significantly greater in the PUI group than in the control group (P<0.05); the tarnish layer score was lower in each experimental group than in the control group. At the top, the mean depth of infiltration was greater in the PUI and PIPS groups than in the control group (P<0.05), and the smear layer score was lower in the PIPS group than in the other groups (P<0.05). After the time was changed, the depth of infiltration of PUI increased only in the apical segment as the flushing time increased.@*CONCLUSIONS@#The PUI and PIPS methods facilitate the penetration of irrigation solution into the dentin canal in curved root canals, especially in the apical segment. The PIPS technique is effective in removing the smear layer in curved root canals.

The effects of compound danshen dripping pills combined with triamcinolone acetonide in the treatment of oral submucous fibrosis / 实用口腔医学杂志

Objective:To observe the efficacy and safety of compound danshen dripping pills(DDP)combined with intralesional tri-amcinolone acetonide(TA)injection in the treatment of oral submucous fibrosis(OSF).Methods:34 patients with clinically con-firmed OSF were randomly divided into 2 groups(n =17)and treated with DDP +TA and TA respectively,meanwhile the VAS of pain and mouth opening were recorded and compared.Results:Before treatment there was no statistical difference of the VAS scores and mouth opening between 2 groups(P >0.05),12 weeks after treatment,the difference was significant(P ＜0.05).The clinical condi-tion of treatment group were improved(χ2 =6.051,P ＜0.05),but there were no improvement in control group(χ2 =3.429,P >0.05).Conclusion:Compound danshen dripping pills combined with intralesional triamcinolone acetonide injection can significantly enhance the effects safely in the treatment of OSF.

Oral health-related quality of life in patients with oral lichen planus / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the oral health-related quality of life in patients with oral lichen planus (OLP) using the Chinese version of the oral health impact profile (OHIP)-14.</p><p><b>METHODS</b>51 patients with OLP were included and completed the questionnaire of OHIP-14 subsequently the REU scoring system was utilized to record the local condition and a visual analogue scale (VAS) to rate the pain they experienced. The reliability and validity were analyzed by SPSS 16.0 software.</p><p><b>RESULTS</b>The score of OHIP-14 was 21.67 +/- 9.45, Cronbach's alpha of the translated scale was 0.901. The items were divided into 5 domains by factor analysis. There was certain logical relation between the items in the same domain. There was highly significant association between the OHIP-14 score and REU score as well as VAS score (r=0.608, 0.807, P<0.000).</p><p><b>CONCLUSION</b>OHIP-14 performs well in patients with OLP, and have good validity and reliability.</p>