Objective:To evaluate the effectiveness of minimal flap surgery in the treatment sub-gingival caries ( class V cavities) . Methods:57 teeth(4 incisors, 13 canines, 38 premolars and 2 molars) with sub-gingival caries in 42 patients were treated by com-bined gingival flap surgery. Sub-gingival caries was fully exposed and the lesion was fully removed, then the deffects were filled with flowing resin. Before operation, 6 and 12 months after treatment, PD, SBI and gingival recession were examined. Results:Success rate of the treatment was 98. 25%. No statistically significant difference of the indexes was found during 12-month-follow up. Conclu-sion:Minimal flap surgery is effective for the treatment of sub-gingival caries ( class V cavities) .

OBJECTIVETo evaluate methodological and reporting quality of the randomized controlled trials on cognitive-behavioral therapy(CBT) on temporomandibular disorders(TMD).

METHODSThe electronic databases of Medline via Ovid, EMBASE, Cochrane Central Register of Controlled Trial, CBM and CNKI, and five Chinese stomatological journals were included to collect randomized controlled trial(RCT) and quasi-RCT(qRCT) on CBT on TMD. Data were assessed using the quality assessment criteria recommended by the Cochrane Collaboration, and the reporting quality was assessed using the consolidated standards of reporting trials (CONSORT) checklist.

RESULTS232 articles were collected by the search strategy, of which 5 (3 RCTs and 2 qRCTs) met the inclusion criteria. The methodological quality varied among the studies with 2 scored as B and 3 as C. The highest score evaluated by the CONSORT checklist was 24.

CONCLUSIONThe methodological qualities of included studies on CBT on TMD are generally low, and its reporting quality which is checked by CONSORT is also unsatisfactory yet.

Cognitive Therapy ; Humans ; Randomized Controlled Trials as Topic ; Temporomandibular Joint Disorders ; therapy

Objective: This in vitro study aimed to investigate the remineralization effect of the natural medicine epigallocatechin gallate on artificial enamel caries in primary human teeth. Methods : We divided 30 sound primary upper anterior teeth into 3 groups according to a random number table, including experimental group (epigallocatechin gallate group), positive control group (NaF group) and blank control group (artificial saliva group), with 10 teeth in each group. After test in vitro, Micro Hardness Tester was applied to measure hardness of samples before and after demineralization. Scanning electron microscopy (SEM) was used to observe the result of primary enamel surface remineralization. Results: A significant increase in enamel surface microhardness between the three groups after remineralization (F=1 199.975, P < 0.05). The difference between 2 groups was compared with each other among 3 groups. Statistical significance was found (vs experimental group q=41.986, P < 0.05; vs positive control group q=68.174, P < 0.05), suggesting that both positive control group and experimental group could promote the remineralization of primary enamel, and the effect of epigallocatechin gallate was weaker than NaF (q=26.188, P < 0.05 ). The results from SEM indicated that there was large amount of sediment on the surface of primary enamel surface of incisors in the experimental group and positive control group, while primary enamel surface of incisors in the blank control group was honeycomb and uneven, with less sediment. Conclusion Based on this in vitro study, epigallocatechin gallate can promote the remineralization of demineralized enamel of primary teeth, indicating its potential use as a natural remineralization medicine.

Objective: To investigate the relation between serum markers, the degree of lesions and the active period of chronic periodontitis in patients with type 2 diabetes mellitus. Methods: A total of 595 patients with type 2 diabetes mellitus were selected, and oral examinations and laboratory tests were conducted. The patients were divided into a periodontally healthy group mild, moderate and severe periodontitis groups depending on the diagnostic criteria for chronic periodontitis. The patients were also divided into periodontally healthy, resting and active groups depending on the diagnostic criteria of the active period. The relationships between serum biochemical indices, the degree of lesions and chronic periodontitis activity were analyzed. Results: The prevalence of chronic periodontitis in patients with type 2 diabetes was 74.6%, and the proportions of patients with mild, moderate, and severe chronic periodontitis were 44.9%, 16.1% and 13.6%, respectively. The composite ratio of active periodontal chronic periodontitis was 33.1%. Compared with the patients in the control group, the fasting plasma glucose and HbA1c levels were more poorly controlled in the type 2 diabetes mellitus groups with chronic periodontitis (P < 0.05). There were significant differences in fasting blood glucose levels between mild periodontitis group and moderate, severe periodontitis group (P < 0.05). There was no significant difference in HbA1c levels among the mild, moderate and severe groups (P>0.05). However, there were significant differences in fasting blood glucose levels between the groups with various degrees of progression in the following order: active (11.24 mmol /L) > resting (9.64 mmol/L) > control (8.82 mmol/L) (P < 0.05). Conclusion The severity of chronic periodontitis plays no role in the level of HbA1c, instead, the level of fasting plasma glucose changes with the severity and progression of chronic periodontitis.