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Objective@#To investigate the influential factors related to the long-term effect of periodontal-orthodontic treatment in patients with aggressive periodontitis (AgP).@*Methods@#A retrospective analysis was conducted in 25 AgP patients, who have received periodontal-orthodontic treatment in Peking University School and Hospital of Stomatology. Changes in the ratio of the residual alveolar bone height (RBH) was measured at three time points: baseline (T0), post orthodontic treatment (T1), and the last re-visit 3 years after orthodontic treatment (T2). Root abnormity was evaluated by observing periapical radiographs, and its relationship with alveolar bone loss after orthodontic treatment was analyzed. A multi-level analysis on factors related to the clinical outcome (alveolar bone height change) was performed.@*Results@#Totally 693 teeth of 25 patients at T0 and T1 and 368 teeth of 14 patients at T2 were investigated. During the periodontal-orthodontic treatment, the RBH was mainly influenced by root abnormity (estimation value −2.392), tooth position (estimation value for upper teeth vs. lower teeth 3.139, and anterior teeth vs. posterior teeth −3.469) and the baseline RBH at T0 (estimation value −0.391) (P<0.05). Teeth with root abnormity, teeth in mandibular and anterior area, and teeth with higher RBH showed less change in T1-T0 RBH values. In the long-term follow-up, RBH was mainly influenced by tooth position (estimation value for upper teeth vs. lower teeth 3.735, and anterior teeth vs. posterior teeth −5.318), the baseline RBH and probing depth (PD) at T0. Teeth in mandibular and anterior area, teeth with higher RBH (estimation value -0.498) and PD (estimation value -1.594) (P<0.05) showed less change in T0-T2 RBH values.@*Conclusions@#During orthodontic treatment, teeth with abnormal root, lower teeth, anterior teeth, and teeth with high RBH were unfavorable factors for bone gain. In the long-term observation, lower teeth, anterior teeth, teeth with high RBH and PD at first visit were unfavorable factors for bone gain.
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Objective@#To investigate periodontal status of patients with pre-diabetes and evaluate the prevalence of periodontal pathogens in oral cavity.@*Methods@#All the subjects were under regular care in urban area of Beijing, including 88 subjects with normal blood glucose (normal blood glucose group), 27 pre-diabetic patients (pre-diabetic group), 58 well-controlled diabetic patients (glucose well controlled group) and 72 poor-controlled diabetic patients (glucose poor controlled group). Whole unstimulated saliva samples were collected before periodontal examination. Periodontal parameters, including plaque index (PLI), probing depth (PD), bleeding index (BI), bleeding on probing (BOP) and clinical attachment loss (CAL), were examined at mesial-buccal and distal-lingual sites of each tooth. Number of missing teeth was recorded. DNA was extracted from the salivary deposition, Porphyromonas gingivalis (Pg), Tannerella forsythia (Tf), Treponema denticola (Td), Campylobacter rectus (Cr), and Prevotella nigrescens (Pn) were detected by using PCR method based on 16SrRNA. Periodontal status and prevalence and quantity of the pathogens under various blood glucose states were compared.@*Results@#The PD scores of four groups had no statistical differences. The CAL [(2.29±1.35) mm] and the number of missing teeth[2.0 (7.0)] in pre-diabetic group were significantly lower than that in glucose poor controlled group [(3.07±1.45) mm, P=0.04 and 5.0 (10.0), P=0.04, respectively]. The number of missing teeth in pre-diabetic group [2.0 (7.0)] was significantly lower than that in glucose well controlled group [5.0 (9.0), P=0.02]. The percent of bleeding on probing [BOP(+)%] in pre-diabetic group [(63.89±20.03)%] was significantly higher than that in normal blood glucose group [(54.51±22.29)%, P=0.04] and glucose well controlled group [(53.12±21.77)%, P=0.03]. The prevalence of Pg in pre-diabetic group (81.5%) was significantly higher than that in glucose poor controlled group (54.2%, P=0.02). The prevalence of Tf in pre-diabetic group (96.3%) was significantly higher than that in glucose poor controlled group (76.4%, P=0.01). Meanwhile the quantity of Pg [1.58 (4.75)] and Tf [5.46 (7.77)] in pre-diabetic group were significantly higher than that in glucose poor controlled group [0.60 (1.87), P=0.01 and 1.63 (3.06), P<0.01, respectively]. The quantity of Pn [0.85 (1.68)] in pre-diabetic group was significantly higher than that in normal blood glucose group [0 (1.02), P=0.04].@*Conclusions@#Pre-diabetic patients showed severe periodontal infection and BOP(+)% than other three groups and had high risk-level of periodontitis.
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Objective@#To compare the short-term outcomes of a collagen matrix (CM) and free gingival graft (FGG) in augmenting keratinized mucosa around dental implants.@*Methods@#Nineteen partially edentulous patients who had undergone implant surgery or implant review from June 2017 to June 2018 at Department of Periodontology, Peking University School and Hospital of Stomatology with lack of keratinized mucosa at buccal aspect of implants (<2 mm) were recruited in this study. According to the width of keratinized mucosa (KW) pre-operation, 9 patients including 5 males and 4 females were assigned into control group (KW<0.5 mm) which performed free gingival graft (17 implants) and 10 patients including 3 males and 7 females were assigned into experimental group (KW≥0.5 mm) which used collagen matrix as the grafts (15 implants). The KW at buccal aspect of each implant were measured pre-operation and 2 weeks, 1 month, 2 months, 3 months after surgery respectively. Each of the patients was required to fill out a questionnaire using a visual analogue scale to assess the postoperative morbidity.@*Results@#The KWs around implants were increased significantly during the 3 months follow-up period in both groups (P<0.01). At 3 months after surgery, KW gain in control group was (3.44±1.64) mm, in experimental group was (2.30±0.82) mm, the difference between two groups was statistically significant (P<0.05). Meantime, the total shrinkage of KW in control group [(34±25)%] and experimental group [(51±11)%] also showed a statistically significant difference (P<0.01). However, by using collagen matrix as the grafts, augmented tissues had a much more comparable appearance with adjacent tissues than that in control group. And the patients of experimental group experienced much less postoperative bleeding than those of control group.@*Conclusions@#Both collagen matrix and free gingival graft can significantly increase the KW around implants within the 3 months post-surgery follow-up period. There were more KW gain and less shrinkage in group FGG than that in group CM. However, surgery time were reduced and the postoperative bleeding were less in group CM than in group FGG as no harvesting procedure was needed.
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World Workshop on the Classification of Periodontal and Peri-implant Diseases and Conditions was held in Chicago on November 9 to 11, 2017. More than one hundred experts from all over the world attended the conference and updated the 1999 classification of periodontal diseases and conditions, and developed a similar scheme for peri-implant diseases and conditions. The case definitions and diagnostic criteria were also established to aid clinicians in the use of the new classification. Nineteen review papers and four consensus reports covering relevant areas in periodontology and implant dentistry were simultaneously published in special issue of Journal of Periodontology and Journal of Clinical Periodontology in June 2018. This paper summarizes the new classification of periodontal and peri-implant diseases and conditions, and briefly introduce the changes made to the 1999 classification.
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Objective@#To assess clinical and radiographic outcomes of short implants (length six mm) in the posterior region and early-loading with splinted fixed dental prostheses.@*Methods@#Forty-five patients were recruited at 3 centers and 2-3 implants (diameter 4 mm, length 6 mm) were implanted in each case. Totally, ninty-five implants were placed, using one-stage surgery protocol and loaded with a screw-retained splinted fixed prosthesis 6 weeks later. Clinical and radiographic examinations were performed preoperatively, post-surgery, at loading, and 6, 12 and 24 months after prosthesis placement.@*Results@#Four implants were removed before loading. A total of 36 patients with 76 implants completed the whole treatment and 2 year follow-up according to the research design. No implant was lost after loading, and the 2-year survival rate of the implant was 100%(76/76). In all cases, the response of swelling and pain after operation was mild, and the bone resorption around the implants was not obvious at 6 months [(0.04±0.29) mm], 1 year [(-0.11±0.44) mm], and 2 years [(0.00±0.53) mm] after loading. Bone loss less than 1.00 mm was found only in 26% (18/69) implants after 2 years of loading, and the height of the alveolar bone around 17% (12/69) of the implant increased. During 2-year follow-up, the probing depth of the implants increased by nearly 0.50 mm, but there was no clinical significance (P>0.05).@*Conclusions@#The 2-year results of this study showed that the 6-mm-long implants can be a predictable procedure, especially in situations with limited bone height in posterior edentulous regions.
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Peri-implant disease is an inflammatory status which leads to the destruction of the soft and hard tissues around osseointegrated implants, including peri-implant mucositis and peri-implantitis. It is generally accepted that bacterial infection appears to be responsible for peri-implant lesions. This review aims to summarize the characteristics of the subgingival microbiota in healthy and diseased implants and compare the microbial composition of subgingival biofilm in teeth with periodontal disease and in diseased implant, so as to provide biological basis on the diagnosis, therapy and prevention of peri-implant disease in clinical practice.
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Objective@#To research the variation of subgingival microorganisms after 65 μm glycine powder air-polishing (GPAP) in patients with periodontitis during periodontal maintenance phase and make comparison with conventional method.@*Methods@#From Department of Periodontology, Peking University School and Hospital of Stomatology, twenty-one patients at the age of 35-72 (8 males and 13 females) who were systematically healthy were recruited in this study. According to splitting-mouth design, one side of a mouth was randomly assigned to the experiment group (21 patients, 248 teeth, 1 488 sites) with 65 μm GPAP therapy while the opposite side served as the control group (21 patients, 249 teeth, 1 494 sites) with ultrasonic scaling plus polishing paste therapy. The clinical periodontal parameters including probing depth (PD), bleeding index (BI), bleeding on probing (BOP) and plaque index (PLI) were recorded. Using sterile currette, the subgingival plaque samples were collected at the mesio-buccal site of the first or second molars at baseline, 2, 4, 8 and 12 weeks after therapy, respectively. After Congo red staining, the microorganisms were classified into cocci, bacilli and spirochetes and counted respectively.@*Results@#All clinical periodontal parameters have no difference between two groups at baseline and after treatment 12 weeks. In the experiment group and the control group, PD ([2.33±0.90] and [2.37±1.18] mm), BI (0.96±0.70 and 0.98±0.78) and PLI (0.00[1.00] and 0.00[1.00]) of two groups after treatment 12 weeks were better than those at baseline (PD: [2.48±1.17] and [2.46±0.99] mm; BI: 1.07±0.72 and 1.08±0.75; PLI: 0.00 [1.00] and 0.00 [1.00]) (P<0.05). But BOP(+)% was observably reduced only in the control group after treatment 12 weeks ([17.25±2.21]% vs [25.23±2.83]%) (P<0.05). The percentages of cocci, bacilli and spirochetes were stable and there were not significant differences between the two groups (P>0.05).@*Conclusions@#After 65 μm GPAP therapy, the differences of proportion of subgingival microorganisms are not significant, while the control group has the same trend. The spirochetes remained at a low level, but they rebounded fasterly in the test group than that in the control group. The results indicate that 65 μm glycine powder air-polishing has the similar clinical effects compared with ultrasonic scaling plus polishing paste. However, the clinical indications should be limited to the patients with shallow pockets and without obvious dental calculus.
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Objective:To evaluate the clinical effect and safety of periodontal-orthodontic treatment in patients with aggressive periodontitis (AgP) and malocclusion.Methods:A retrospective analysis was conducted in 25 AgP patients,who had received periodontal-orthodontic treatment in Peking University School and Hospital of Stomatology.Clinical indexes,including probing depth (PD),bleeding index (BI) and percentage of sites with bleeding on probing (BOP％) were evaluated at three time points:Baseline (T0);active periodontal treatment finished and before orthodontic treatment (T1);and after orthodontic treatment (T2).Also changes of ratio of the residual alveolar bone height (RBH) and the occurrence of root resorption were evaluated by periapical radiographs.Results:(1) Compared with T0,all the clinical parameters including PD,BI,BOP％ and percentage of sites with PD ＞ 3 mm were significantly improved (P ＜0.001).(2) Significant difference was observed in the average RBH between T0 (68.37％ ± 15.60％ and T2 (70.27％ ± 14.23％).RBH in upper incisors [(58.79％ ± 16.71％ at T0,65.54％ (55.74％,78.13％) at T2],upper canines [77.62％ (66.06％,87.17％) at T0,79.57％ (69.75％,86.52％) at T2] and upper molars [74.30％ (61.69％,84.45％) at T0,76.76％ (68.12％,85.09％) at T2] showed significant increase (P ＜ 0.05).(3) After orthodontic treatment,varying degrees of root resorption occurred in (23.94％ ± 13.45％) of teeth per capita,among which the lower and upper incisors showed the highest incidence (68.48％ and 65.31％ in homogeneous teeth,respectively).Conclusion:After active periodontal treatment,orthodontic treatment in AgP patients had not aggravated inflammation and alveolar bone resorption;root resorption occurred in two-thirds of incisors approximately.
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Objective:To establish a stable primary culture method of human gingival epithelial cells, with a higher successful rate and shorter culture time.Methods:Nine patients who received “crown-lengthening surgery”with relatively healthy periodontal conditions were selected (n =9).Gingival sam-ples were collected from the 9 donors during gingivectomy.Gingival epithelial cells were isolated and cul-tured by both an advanced enzyme digestion method and a tissue explant method.In the advanced enzyme digestion culture process,2.5 g/L DispaseⅡwas used to separate the epithelial tissue part from the con-nective tissue part,which lasted for one night.Then the epithelial tissues were digested by 0.025% tryp-sin without EDTA for 10 minutes,and centrifuged by keeping the digested epithelial tissues that re-mained.This advanced method not only decreased the concentration and digesting time of the two above-mentioned enzymes,but also simplified the centrifugel process.The tissue explant method was not changed too much compared with the original method.Growing processes of the primary cells cultured by the two methods were observed and recorded respectively,and indirect immunocytochemical staining was used to identify the type of cultured cells.At the same time,successful rates and cell culture time were also compared between the two methods.Results:Human gingival epithelial cells with typical morpholo-gy could be cultured within a shorter period by the advanced enzyme digestion method with a successful rate of 88.9%,and proliferated rapidly as sheets.After 10 -14 d cells could be passaged,gradually turned to be like fibroblasts when passaged to the third generation,and eventually went to apoptosis.The primary culture time was longer by using the tissue explant method,and approximately after 17 -22 d cells could be passaged,although the successful rate was the same as the enzyme digestion method.Cy-tokeratin staining was both positive by indirect immunocytochemical staining of cells.Conclusion:Pri-mary human gingival epithelial cells cultured by the advanced enzyme digestion method could grow faster and be passaged to the second generation successfully,which could supply a stable origin for cellular ex-periments.
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<p><b>OBJECTIVE</b>To compare the incidence of technical complications of implant-supported fixed dental prostheses in Chinese patients with a history of moderate or severe periodontitis and periodontally healthy patients(PHP) and analyze the effects of interproximal papillae patterns on food impaction and efficacy of plaque control.</p><p><b>METHODS</b>A total of 103 partially edentulous patients treated with implant-supported fixed dental prostheses between December 2009 and December 2012 for a minimum 1-year follow-up period were recruited from Department of Periodontology, Peking University, School and Hospital of Stomatology. Based on the initial periodontal examination, the participants were divided into three groups: 30 PHP, 36 moderate periodontally compromised patients(mPCP) and 37 severe periodontally compromised patients(sPCP). Implant survival/loss, technical complications, plaque index, papilla index, food impaction and degree of proximal contact tightness of each patient were assessed around the implants at follow-up. According to the implant papilla index, the implants were divided into two groups: the "filling" group with the mesial and distal aspects with papilla index=3 and the "no filling" group with at least one aspect with papilla index<3. Data on implant survival, technical complications were analyzed. Comparisons of the incidence of technical complications were performed between the patients with different periodontal conditions with chi-square or Fisher's exact test. The influences of the interproximal papillae loss on food impaction and efficacy of plaque control were estimated with chi-square and Mann-Whitney U tests.</p><p><b>RESULTS</b>The total implant survival rate was 100%(162/162) for all three groups. Technical complications were as following: veneer fractures(1.9%, 3/162), abutment screw loosening(1.9%, 3/162), prosthetic screw loosening(3.1%, 5/162) and decementation(3.1%, 5/162) in all subjects. No implant/screw fracture was noted. The incidence of technical complications in sPCP, mPCP and PHP did not yield statistically significant differences(P>0.05). The proportion of the implant with the mesial and distal papilla index=3 in the sPCP was less than that in the PHP and mPCP. The interproximal papillae loss did not appear to affect the food impaction and the plaque index in all three groups(P>0.05). However, for the PHP, the accumulation of plaque at buccal aspect was more in the "no filling" group compared with the "filling" group (implant plaque index[M(Q)]: 1[1] vs 0[0]), and for the sPCP, the accumulation of plaque at lingual aspect was more in the "filling" group compared with the "no filling" group(implant plaque index[M(Q)]: 1[1] vs 0[1], (P<0.05).</p><p><b>CONCLUSIONS</b>The patients with a history of severe periodontitis did not exhibit more technical problems compared with the periodontally healthy patients. The interproximal papillae loss did not show a negative impact on the plaque control and food impaction. However, for the sPCP, changing the morphology and the position of the interproximal contact point to reduce the interdental black triangle may lead to accumulation of plaque at lingual aspect. More attention should be placed on the morphology design of prosthesis, but not the papillae filling up the interproximal space.</p>
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Humans , Beijing , Dental Abutments , Dental Implants , Dental Plaque , Diagnosis , Dental Plaque Index , Dental Prosthesis, Implant-Supported , Classification , Dental Restoration Failure , Follow-Up Studies , Food , Gingiva , Jaw, Edentulous, Partially , Rehabilitation , Periodontal Diseases , Classification , TherapeuticsABSTRACT
Objective:To investigate the potential association between FADS1 rs1 74537 polymorphism and serum proteins in patients with aggressive periodontitis,which may provide benefits for diagnosis and treatment of aggressive periodontitis.Methods:A total of 353 patients with aggressive periodontitis (group AgP)and 1 25 matched controls (group HP)were recruited in the study.Genotyping of FADS1 rs1 74537 and serum biochemical indexes were tested at the study’s start.The relationships between the levels of TP,GLB,ALB,A/G and genotyping were analyzed.Results:(1 )The detection rate of allele G in group AgP was higher than that in group HP(68.1% vs.61 .2%,P=0.046,OR=1 .35,95% CI 1 .00-1 .83 );the detection rate of genotype GG in group AgP was higher than in group HP(45 .5%vs. 34.4%,P=0.029,OR=1 .60,95%CI 1 .05 -2.44).(2)In group AgP,the patients with GG geno-type exhibited significantly lower TP,GLB than the patients with GT+TT genotype [(77.08 ±7.88)g/L vs.(79.00 ±4.66)g/L,P=0.007;(28.1 7 ±7.63)g/L vs.(29.88 ±3.49)g/L,P=0.007)and the higher A/G(1 .72 ±0.22 vs.1 .67 ±0.22,P=0.040),but there was no significant difference in ALB between the patients with GG genotype and the patients with GT+TT genotype.In group HP,there were no significant differences in TP,GLB,A/G and ALB between individuals with genotype GT+TT and with genotype GG.(3 )Compared with individuals with genotype GT+TT in group HP,the AgP pa-tients with genotype GT +TT exhibited significantly higher TP,GLB [(79.00 ±4.66 ) g/L vs. (75.20 ±4.53)g/L,P<0.01;(29.88 ±3.49)g/L vs.(26.55 ±2.94)g/L,P<0.01 )and the lo-wer A/G(1 .67 ±0.22 vs.1 .88 ±0.30,P<0.01 ),but there was no significant difference in ALB. There were no significant differences in TP,GLB,A/G and ALB the between the AgP patients with ge-notype GG and the healthy subjects with the same genotype either.Conclusion:FADS1 rs1 74537 poly-morphism is associated with aggressive periodontitis.The patients with genotype GG in group AgP had relatively lower TP,GLB and higher A/G.Genotype GG might be a risk indicator for aggressive periodon-titis by reducing host defense capability and contributing to inflammatory response in the occurrence and development of aggressive periodontitis.
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<p><b>OBJECTIVE</b>To evaluate the clinical effect of the 65 µm glycine powder air-polishing (GPAP) and ultrasonic scaling during periodontal maintenance phase.</p><p><b>METHODS</b>Twenty-three patients at the age of 28-72 (8 males and 15 females) who were systematically healthy were involved in this study. According to splitting-mouth design, one side of a mouth was randomly assigned to the experiment group with 65 µm GPAP therapy, while the other side was the control group with ultrasonic scaling therapy. The clinical parameters including probing depth (PD), bleeding index (BI), gingival recession (Rec), plaque index (PLI), staining index (SI) were recorded. The patients' perception of treatment was assessed by visual analogue scale (VAS). The treatment time was recorded and compared between the two groups.</p><p><b>RESULTS</b>Both of the two methods had good clinical effects. PD, BI and PLI of the two groups 12 weeks after treatment were better than those at baseline (P < 0.01). There was no significant deference between the two methods at baseline and at the 12 weeks after treatment. The VAS value of experiment group was better than that of control group (1.7 ± 1.3 vs. 3.3 ± 1.8, P < 0.01). The treatment time of experiment group was also shorter than that of control group [(192.7 ± 82.7) s vs. (345.4 ± 116.9) s, P < 0.01].</p><p><b>CONCLUSIONS</b>The results indicate that 65 µm GPAP may be as effective as the ultrasonic scaling during periodontal maintenance phase. 65 µm GPAP had the advantage of more comfort and less time consuming.</p>
Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Air Abrasion, Dental , Methods , Dental Plaque Index , Dental Polishing , Methods , Dental Scaling , Methods , Gingival Recession , Diagnosis , Glycine , Periodontics , Powders , Random Allocation , Ultrasonic Therapy , Methods , Visual Analog ScaleABSTRACT
Objective:To analyze the serum IgG titers to Aggregatibacter actinomycetemcomitans ( Aa ) and associated factors in patients with aggressive periodontitis (AgP).Methods:Venous blood samples were collected from 62 AgP patients and 45 periodontal healthy controls , unstimulated whole saliva and pooled subgingival plaque samples of AgP patients were also collected for the detection of Aa ( PCR method) .Serum IgG titers to Aa serotype c were measured by enzyme-linked immunosorbnent assay ( ELISA) .Results:The detection rates of serum IgG to Aa serotype c in the AgP patients and the healthy controls were both 100%.The AgP patients exhibited significantly higher IgG titers to Aa serotype c than the healthy controls (11.1 ±1.9 vs.9.1 ±1.8, P<0.01).There was no significant difference in serum IgG levels to Aa serotype c and in the prevalence of high-responding patients to Aa serotype c between the incisor-first molar type AgP patients and generalized AgP patients .Serum IgG titers to Aa serotype c in the Aa-positive AgP patients ( the patients who were Aa-positive in subgingival plaque or saliva ) were sig-nificantly higher than those of the Aa-negative patients (11.9 ±1.3 vs.10.7 ±2.1, P<0.05).Con-clusion:Serotype c was the main serotype of Aa in Chinese patients with AgP .Serum IgG responses in generalized AgP patients were comparable to those in incisor-first molar type AgP patients .
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Objective: To evaluate the feasibility of full-mouth debridement ( subgingival scaling and root planning , SRP) by 2 times within 1 week and compare the clinical effects of different sequences of debridement-antibiotic usage in patients with severe chronic periodontitis ( CP ) .Methods: A double-blinded, placebo-controlled, randomized clinical trial was conducted in 30 severe CP patients (14 males and 16 females, 40.5 ±8.4 years old on average from 35 to 60 ) receiving 3 different sequences of debridement-antibiotictherapy:Group A, antibiotic usage (metronidazole, MTZ, 0.2 g, tid, 7 d;amo-xicillin, AMX 0.5 g, tid, 7 d) was started together with SRP ( completed by 2 times in 7 d);Group B, antibiotic usage (MTZ 0.2 g, tid, 7 d;AMX 0.5 g, tid, 7 d) was started 1 d after SRP(completed by 2 times in 7 d);Group C, SRP alone[probing depth (PD), bleeding index (BI) and tooth mobility] was examined .The average full-mouth probing depth , the average full-mouth proximal probing depth ( pPD) , the percentage of sites with PD >5 mm ( PD>5 mm%) , the percentage of sites with proximal PD>5 mm ( pPD>5 mm%) , the average bleeding index ( BI) and the percentage of sites with bleeding on probing ( BOP%) were calculated .Clinical examinations were performed at baseline and 2 months post therapy .Results:(1) Compared with baseline conditions , all the subjects showed clinical improve-ments in all the parameters evaluated 2 months post therapy , P<0 .05 .( 2 ) Significant difference were observed in the average PD changes between Group A [(2.15 ±0.42) mm], Group B [(1.76 ±0.29) mm] and Group C [(1.57 ±0.33) mm], P<0.05.No significant difference was observed in the aver-age PD changes between Group B and Group C , P=0.354.Significant differences were observed in the average pPD changes between Group A [(2.45 ±0.43)mm] and Group C[(1.90 ±0.48) mm], P<0.05.No significant difference was observed in BI and BOP% changes between Group A ,Group B and Group C.Conclusion: For patients with severe chronic periodontitis , it is safe and feasible to receive full-mouth SRP by 2 times within 1 week.The short-term ( 2 months ) advantages in PD changes are observed in patients receiving SRP and antibiotic usage at the same time comparing with patients using antibiotics after SRP or SRP alone .
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Objective:To evaluate the differences of clinical parameters and putative periodontal patho-gens in sites of different probing depth ( PD) reduction after non-surgical periodontal treatment in patients with aggressive periodontitis ( AgP ) .Methods: Clinical examinations including plaque index , probing depth (PD), attachment level (AL) and bleeding index (BI), and full-mouth periapical photographs were collected from 20 patients with AgP .All the patients received non-surgical periodontal treatment , including oral hygiene instruction , supra-gingival scaling , subgingival scaling and root planing ( SRP ) and were followed up for 6 months post-therapy.Gingival crevicular fluids (GCF) were collected at 1 site in each quadrant before and at the end of 6 months post-therapy .Six kinds of putative periodontal patho-gens and 6 kinds of short chain fatty acids ( SCFAs ) were detected in the GCF samples .Results: The baseline clinical parameters of PD , AL and BI , the baseline concentration of succinic acid , acetic acid , propionic acid and butyric acid , and the prevalence of Treponema denticola were significantly higher in sites with PD reduction more than 2 mm sites compared with PD reduction no more than 2 mm sites [(7.7 ±1.2) mm vs.(5.1 ±1.8) mm, (6.3 ±1.9) mm vs.(4.5 ±2.2) mm, 3.8 ±0.4 vs.3.3 ± 0.8, 1.66 mmol/L vs.1.10 mmol/L, 31.67 mmol/L vs.17.78 mmol/L, 3.31 mmol/L vs.1.95 mmol/L, 84.6%vs.56.1%, P5 mm at the end of 6 months post-thera-py , all were found with red complex bacteria infection .Conclusion:The baseline clinical parameters are important factors in predicting PD reduction after non-surgical periodontal treatment in patients with AgP . In sites with deep pockets after non-surgical periodontal treatment , the active control of red complex bac-teria is recommended .
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Objective: To investigate the changes of osteoprotegerin ( OPG) and receptor activator of nuclear factor kappa B ligand ( RANKL) level in perio-implant crevicular fluid ( PICF) and to monitor the development of the stability of Straumann ? tissue-level implants by resonance frequency analysis ( RFA) during the early phases of healing .Methods: A total of 35 implants ( length 10 mm ) were placed.PICF samples were collected with filter paper strips at baseline , 1, 2, 3, 4, 6, 8, and 12 weeks post-surgery, respectively.The OPG, RANKL levels were determined by ELISA method .At the same time points, the implant stability quotient (ISQ) values were determined with Osstell TM mentor.Results:During healing , PICF-OPG levels increased significantly 2 weeks after surgery when compared with the 4th-, 6th-, 8th-and 12th-week reevaluation (P<0.05).The OPG/RANKL ratio in PICF was significantly higher ( P<0 .05 ) than that in gingival crevicular fluid at 1 week post-surgery .ISQ slightly fluctuated within the first 4 weeks after installation .Following this, the ISQ values increased steadily for all the implants and up to 12 weeks.Significant differences were noted between the mean ISQ values at the 12th-week and other observation time points .Conclusion: The PICF-OPG levels may be effective in monito-ring the process of osseointegration .All the ISQ values indicated the stability of Straumann ? implants over a 12-week healing period .RFA is a reliable and effective assistant to monitor implant stability .
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<p><b>OBJECTIVE</b>To determine the level of leptin in gingival crevicular fluid (GCF) of patients with aggressive periodontitis (AgP) and to analyze the relationship between leptin and periodontal cilinical parameters.</p><p><b>METHODS</b>Fifty-four patients with AgP and 30 healthy controls were recruited. Detailed clinical examinations were conducted, and clinical parameters such as bleeding index (BI), probing depth (PD), attachment loss (AL) were recorded. Two teeth were selected as test teeth in each subject, one from posterior area and the other from anterior region. The level of GCF leptin was measured by enzyme linked immunosorbent assay.</p><p><b>RESULTS</b>The level of GCF leptin in AgP patients was significantly lower than that of control subjects [(16.5±4.6) ng vs.(26.0±6.0) ng, P < 0.05]. The level of GCF leptin was negatively related to BI (-0.306, P < 0.01), PD (-0.346, P < 0.01) and AL (-0.250, P < 0.01).</p><p><b>CONCLUSIONS</b>AgP patients have significantly decreased level of GCF leptin and the level of leptin was negatively related to BI, PD and AL.</p>
Subject(s)
Adult , Female , Humans , Male , Aggressive Periodontitis , Metabolism , Case-Control Studies , Enzyme-Linked Immunosorbent Assay , Gingival Crevicular Fluid , Chemistry , Leptin , Periodontal IndexABSTRACT
<p><b>OBJECTIVE</b>To measure the levels of plasma calprotectin in aggressive periodontitis (AgP) patients and to analyze the relationship between the plasma calprotectin and neutrophil count.</p><p><b>METHODS</b>Venous blood samples were collected from 61 AgP patients and 48 periodontally healthy controls. Clinical examination consisted of bleeding index (BI), probing depth (PD), attachment loss measurements (AL) and percentage of severe sites. Plasma level of calprotectin was determined by enzyme-linked immunosorbent assay.</p><p><b>RESULTS</b>The plasma concentrations of calprotectin in AgP patients [(2.1±1.1) mg/L] were significantly higher than those in healthy controls[(1.5±0.6) mg/L] (P < 0.01). The plasma concentration of calprotectin in AgP patients was positively correlated with BI (r = 0. 271, P = 0.035), PD (r = 0.437, P = 0.000), AL (r = 0.450, P = 0.000) and percentage of severe sites (r = 0.423, P = 0.001). While the neutrophil count was also positively correlated with the plasma concentrations of calprotectin in AgP patients (r = 0.380, P = 0.004).</p><p><b>CONCLUSIONS</b>AgP may have impact on the elevation of plasma level of calprotectin.</p>
Subject(s)
Humans , Aggressive Periodontitis , Blood , Allergy and Immunology , Case-Control Studies , Enzyme-Linked Immunosorbent Assay , Leukocyte Count , Leukocyte L1 Antigen Complex , Blood , Neutrophils , PlasmaABSTRACT
Objective: To explore the association of the single nucleotide polymorphisms (SNPs) in N-formylpeptide receptor (FPR) gene with the susceptibility of aggressive periodontitis (AgP). Methods: A total of 94 AgP patients and 73 healthy controls were entered into the study. Peripheral blood sample was obtained from each subject by venepuncture. Genomic DNA was isolated from each sample.The target fragment of FPR gene was amplified by PCR. The SNPs in FPR gene were detected by denature high performance liquid chromatography ( DHPLC) combined with DNA sequencing. Results: There were two non-synonymous SNPs in the 370 bp FPR gene fragment;289C/A and 301G/C. The 289C/Awas a novel SNP. No variation in nucleotides 329 and 378 was detected. There were no statistically significant differences in distributions of the genotypes and alleles for FPR289 and FPR301 between AgP patients and healthy controls. Using multivariate logistic regression (adjusted for age and gender) , it was showed that the adjusted Ors of AgP for the C~+ genotype and allele C of FPR301 combined with smoking were 5.74 and 5.20 respectively. Conclusion: The presence of the C~+ genotype/allele C of FPR301 together with smoking conferred a higher risk for AgP. The result suggests that the SNPs in FPR gene may not be associated with the susceptibility of AgP in Chinese.
ABSTRACT
Objective To study the ultrastrueture of 3 types of periodontal cells, including periodontal ligament cells (PDLC), os-teoblast cells (OB) and eementoblast cells (CB). Methods After culturing 3 kinds of periodontal cells - PDLC, OB and CB, we observed them with transmission electron microscope. Results There was rich rough endoplasmic reticulum and lots of microfilaments in the cyto-plasm of CB and PDLC cells. There was rich rough endoplasmic in the cytoplasm of OB cells. Conclusion The main characteristic ultra-structure feature of the bovine CB and PDLC was rich rough endoplasmic reticulum and microfilaments in the cytoplasm. Compared with CB and PDLC, OB contained fewer microfilaments in the cytoplasm.