Application Of Constic Resin In The Treatment Of Root Caries In Patients With Periodontitis

Objective: Age-related changes or long-term periodontal inflammation often lead to gingival recession and thereby create conditions for root caries.The treatment of root caries is difficult because it's cavity is shallow and close to the margin.Therefore,it has important clinical significance for the treatment of root caries to select suitable filling materials.This study is to treat root caries in patients with periodontitis by Constic flowable composite resin,Ketac Molar glass-ionomer cements,Dyract AP compomer,and Beautifil Flow Plus F00 flowable composite resin.The clinical effect of treatment was evaluated by observing the microleakage at the edge of the filling body and the time of operation to provide experimental basis for the treatment of root caries with Constic.Methods:1.Experiment one: Clinical observation of root caries treatment.A total of 80 root caries in 33 patients(19 males,14 females)aged from 52 to 79 years,were collected from The Department of Oral Medicine,Dental Hospital of Hebei Medical University.Inclusion Criteria:(1)The lesion is located on the root surface,the color is from yellowish to brownish yellow,soft or bun,with shallow or deep defects.(2)When the lesion is located in the cement-enamel junction,the area above 1/2 located in the root is recorded as the root caries.(3)The secondary caries on the root is also counted as the root caries.All patients underwent oral hygiene education before treatment and learned to use toothbrushes and floss correctly.Remove the tooth stone and humus as much as possible,and retain the discolored but healthy tooth tissue.These teeth were divided into four groups on average and named Group A,B,C and D.Group A is filled by Constic,group B is filled by Ketac Molar glass-ionomer cements,group C is filled by Dyract AP compomer and group D is filled by Beautifil Flow Plus F00.Record the time from the wet and dry to the completion of filling and the material's situation after 1 month,6 months and 12 months.2.Experiment two:A total of 60 premolars with complete root surface removed due to orthodontics were collected and randomly divided into four groups as in experiment one.A cavity model was prepared at 1/3 of the neck of the proximal and distal teeth of the root.The cavity size was about 2 mm*2 mm and the depth of the hole was about 1 mm.And the cavity was filled with the corresponding material.Then the temperature cycling test was performed.Each group was randomly selected for 5 teeth to make a 1 mm thick specimen.The degree of adhesion between the filling material and the tooth tissue was observed by scanning electron microscopy,and the gap width between the filling body and the tooth tissue was recorded.The remaining 10 teeth in each group were stained with 2% methylene blue solution to prepare specimens,and the microleakage depth was observed under a microscope.Result:1.The filling time of each group was consistent with the normal distribution,and there was no statistical difference between groups A and B.These two groups have statistical difference between group C and group D.And there was statistical difference between group C and group D(P<0.05).Group A and group B had the shortest time,followed by group D.The C group is the longest.2.There was no significant difference in the failure rate of filling at 1 month,6 months and 12 months after operation(P>0.05).3.SEM was used to observe the gap width between the filling body and the tooth tissue at a distance of 0.2 mm from the edge.Group B is the widest,Group C is the second,and Group A,D are the narrowest.There were statistical differences between the groups(P<0.05).But there was no statistical difference between group A and group D(P>0.05).Microscopic observation of microleakage of filling materials,rank and sum test after scoring,A and D groups had the lowest microleakage,group C followed,group B was the worst,and there was statistical difference between groups(P<0.05).There was no significant difference between the group A and D(P>0.05).Conclusion:1.Compared to the Ketac Molar glass-ionomer cements and the Dyract AP compomer,the two flowable resins are more tightly bonded to the root surface tissue and have less microleakage.2.Constic flowable resin's filling time is shorter than Beautifil Flow Plus F00 flowable resin,which reduces patient opening time and is more suitable for root caries treatment in elderly patients with periodontitis or in patients who cannot tolerate long-term clinical operation.