جستجوی مقالات مرتبط با کلیدواژه « scaling » در نشریات گروه « پزشکی »

 Chronic periodontitis (CP) can lead to the loss of tooth-supporting structures. Scaling and root planning (SRP) is the standard treatment, but lasers may provide additional benefits. This study evaluated a 940 nm diode laser as an adjunct to SRP for CP treatment.

 In this split-mouth, randomized clinical trial, 32 CP patients with at least two teeth with a pocket depth of more than 4 mm were treated with regular treatment of SRP plus health education with or without the intervention group. Further, a 940 nm diode laser was applied for the decontamination of the gingival groove. Probing pocket depth, clinical attachment loss (CAL), gingival index (GI), bleeding on probing (BOP), and plaque index (PI) were evaluated at baseline, 4 weeks, and 8 weeks after scaling. The data were analyzed by SPSS software (version 21), where descriptive methods and statistical tests such as the analysis of variance test were used with repeated measurements, and P<0.05 was accepted as statistically significant.

 All parameters improved significantly in both groups (P<0.05), except for GI, which decreased significantly more with a laser versus SRP alone (P<0.05). The results revealed no other statistically significant between-group differences.

 The adjunctive diode laser provided limited additional improvements compared to SRP alone over 8 weeks. The significant GI reduction indicated that a diode laser may provide some benefits for enhancing non-surgical periodontal treatment. Larger trials are needed to determine if this extra improvement is clinically meaningful in the long term.

Clinical Relevance: 

Diode laser adjuncts to SRP demonstrated minimal short-term benefits over SRP alone in CP patients. The role of lasers in periodontal therapy requires further study.

Obesity and periodontitis are two commonly occurring disorders that affect a considerable amount of the world’s population. Several studies have mentioned that there may be a link between the two. The purpose of this systematic review was to determine whether there was a difference in response to nonsurgical periodontal therapies (NSPTs) between obese and nonobese individuals.

An online search was assembled with a combination of Medical Subject Headings terms and free‑text words of the literature published up to December 2020, to identify interventional studies limited to an adult human population. Titles, abstracts, and finally full texts were scrutinized for possible inclusion by two independent investigators. Reduction in periodontal pocket depth was the primary parameter used to assess the outcome of NSPT.

The primary search yielded 639 significant titles and abstracts. After filtering, data extraction, and quality assessment, 34 full‑text studies were selected. All studies matching inclusion criteria, suggest a positive association between obesity and periodontal disease.

Although a possible correlation exists between periodontitis and obesity, as with other oral‑systemic disease implications, some controversy exists. While some studies have reported a distinct correlation between periodontitis and obesity, other papers have suggested only moderate or no association between the two conditions at all. These results advise of a difference between response to NSPT amid obese and nonobese individuals. However, with few quality studies and variable reported findings, there is limited evidence of any significant difference in clinical practice. However, it can be a positive warning that obesity is a risk factor toward the outcome of periodontal disease treatment.

  The aim of periodontal treatment is to remove bacterial plaque and dental calculus by hand and power-driven instruments. However, the comparison of the effectiveness of these instruments has always been controversial. Therefore, this in vivo study investigated and compared the effects of hand and ultrasonic piezoelectric instruments on the roughness of dental surfaces under an atomic force microscope (AFM).

In this study, 35 periodontally hopeless teeth were selected and randomly divided into four groups (n=7). The control group consisted of teeth that had to be extracted for orthodontic or prosthetic treatment (n=7). In group one, scaling and root planing were performed using hand instruments. In other groups, scaling and root planing were performed using piezoelectric ultrasonic instruments with low to high power, respectively. Then the scaled teeth were extracted for analysis under an atomic force microscope.

  This study showed that root roughness significantly differed between different experimental groups (P<0.027). The root roughness (Rq) in the SRP2 group significantly differed from the control group (P<0.05), while no significant differences were observed between the other groups. Furthermore, the least roughness was observed in the SRP3 group, with the highest roughness in the SRP2 group.

Within the limitation of this study, there were no significant differences in surface roughness between different powers of the ultrasonic device.

 Limited evidence is available on the effect of milk as a mouthwash on treating dentin hypersensitivity. The present study aimed to compare the effect of milk as a mouthwash with one anti-hypersensitivity mouthwash in decreasing dentin hypersensitivity after non-surgical periodontal treatment.

Patients with generalized moderate-to-severe chronic periodontitis were selected randomly in the present study and underwent scaling and root planing (SRP). Seventy patients with severe dentin hypersensitivity after two days were assigned to two groups. In group A, the patients were asked to use milk as a mouthwash, and in group B, the patients were asked to use anti-hypersensitiv ity Misswake mouthwash. The patients’ hypersensitivity was measured during follow-up visits. The independent t-test was used to compare denim hypersensitivity between the two groups. Statistical significance was set at P<0.05.

  The results showed a significant decrease in dentin hypersensitivity in both groups on days 15 and 30. In the milk group, 11 and 29 patients fully recovered from dentin hypersensitivity on days 15 and 30, respectively. However, in the anti-hypersensitivity mouthwash group, 8 and 27 patients fully recovered from dentin hypersensitivity on days 15 and 30, respectively. Therefore, more patients benefited from the anti-hypersensitivity effects of milk as a mouthwash. However, the differences were not significant during the whole treatment sessions.

  Using milk as an inexpensive and available mouthwash can decrease dentin hypersensi tivity after SRP.

Compared to other oral conditions, the effect of periodontal diseases on the quality of life (QoL) has received less attention. Hence, the present study aimed at determining changes in QoL related to oral health in patients with periodontal diseases after non-surgical periodontal therapy.

This clinical trial study was conducted on 60 patients with periodontal diseases (moderate to severe periodontitis) referring to the periodontics department. The Oral Health Impact Profile (OHIP) index questionnaire and OHIP-14 were completed for all patients in order to assess the effects of oral status on daily activities before and one month after scaling and root planning. Its association with the age and gender of patients was examined as well. Statistical data were analyzed using the t test, paired t test, and one-way ANOVA.

The results revealed that the QoL of patients with periodontal diseases improved after scaling and root planning (P=0.001). Based on the findings, changes in QoL were not associated with the patients’ gender (P=0.001 and P=0.001 for males and females, respectively) or age (P=0.001 and P=0.001 for less than or equal to 30 years and more than 30 years, respectively).

This study suggested a positive association between non-surgical treatment (NST) of periodontal disease and oral-health-related QoL.

The current study tested netrin-1 as a reliable inflammatory marker of periodontal disease.

Gingival crevicular fluid (GCF) samples were taken at baseline from 30 systemically healthy individuals. Fifteen subjects had stage II grade A or B periodontitis, and 15 were periodontally and clinically healthy. Whole-mouth periodontal parameters [probing depth (PD), clinical attachment loss (CAL), plaque index (PI), and gingival index (GI)] were recorded. The GCF samples were re-collected, and clinical parameters were re-recorded after six weeks following full-mouth scaling and root planing (SRP) in the periodontitis group.

Netrin-1 GCF levels were significantly lower in periodontitis patients than periodontally healthy individuals at baseline with a significant increase in netrin-1 GCF levels after SRP (P<0.05).

Netrin-1 may have a significant role in the inflammatory process of chronic periodontitis; thus, it could be a promising anti-inflammatory marker in periodontal disease.

Corrosion and scaling are important factors affecting drinking water quality, causing health and economic problems. This study aimed to investigate the indicators of corrosion and scaling in Rafsanjan drinking water.

The present descriptive cross-sectional study was conducted in winter 2018 and spring 2019 in Rafsanjan. The 56 samples were randomly taken from the drinking water distribution and transmission networks. Physicochemical parameters, such as pH, temperature, total dissolved solids (TDS), total hardness (TH), calcium hardness (CH), electrical conductivity (EC), and alkalinity were measured.  Finally, corrosion and scaling indices, including langelier index (LI), ryznar index (RI), aggressiveness index (AI), and Puckorius index (PI) were calculated and analyzed.

The mean temperature, pH, CH, TH, TDS, alkalinity, and EC were 17.79 ± 0.80 °C, 8.08 ± 0.11, 56.34 ± 2.72 mg/L.CaCO3, 140.86 ± 6.81 mg/L.CaCO3, 530 ± 110 mg/L, 181.21 ± 13.65 mg/L, and 840 ± 180 µs/cm, respectively. The mean corrosion and scaling indices, including LI = 0.18 ± 0.12, RI = 7.72 ± 0.14, AI = 12.09 ± 0.11, and finally PI = 7.96 ± 0.10 were obtained.

Based on the obtained data, drinking water in the transmission and distribution network of Rafsanjan has scaling properties. Water scaling and deposition causes problems, such as blockage of water transmission and distribution pipes, reduction of flow rate and increase of pressure drop in the network, and finally increase of water facilities operation costs. Therefore, measures should be considered to control the scaling of water in this region.

 This study aimed to evaluate the dentinal hypersensitivity (DH) after manual and ultrasonic scaling.

 In this study 900 teeth were assessed. Plaque index and gingival recession were measured. Prior to scaling and root planning (SRP), DH was measured clinically using a periodontal probe and air jet. The patients reported the discomfort using the Visual Analogue Scale (VAS). Later the teeth in the two opposite quadrants were manually scaled and the other two quadrants were ultrasonically scaled. After 2 weeks, DH was reevaluated with the same two methods. The data were analyzed using the SPSS.

 The DH of 900 teeth in 34 patients was included. 67.6% (23) of participants reported pre-scaling DH and 85.3% (29) experienced post-scaling DH. The prevalence of DH had no significant difference before and after SRP in manual group and ultrasonic group. Also, after SRP, no significant difference was observed between manual and ultrasonic scaling.

 Manual and ultrasonic methods did not increase DH after SRP compared to baseline. Post-scaling DH was not significantly different between the manual and ultrasonic SRP. DH was related to gingival recession. So that, pre-and post- scaling DH were higher in patients with gingival recession.

Corrosion and scaling is one of the major and daily problems in the operation of water facilities and causes problems such as water loss, shortening the life of the facility, creating holes in the pipes, clogging, and pressure loss in the water supply network. Therefore, the purpose of this study is to determine the corrosion and scaling potential of drinking water supply sources in Meshginshahr. This descriptive cross-sectional study was conducted during the two seasons (summer and winter) in 2019. A total of 20 samples which were obtained by averaging 100 samples, were analyzed to determine the corrosion and scaling potential of water resources using Langelier and Ryznar indices in Meshginshahr. The results showed that the annual average of Langelier and Ryznar indices were -1.34 and 10.03, respectively, and the sources of drinking water supply in Meshginshahr were in corrosion and scaling state. Comparison of indicators and results obtained from this study showed that Meshginshahr water has corrosive properties, so it is necessary to constantly study the water supply sources of city and try for adjusting the pH and control other factors affecting corrosion, including concentrations of chloride, dissolved oxygen, and sulfate.

Thisstudy aimed to compare the effect of one and two sessions of antimicrobial photodynamic therapy (aPDT) as an adjunct to scaling and root planing (SRP) on clinical and microbial parameters in patients with chronic periodontitis.

This study was conducted on 20 patients. The dental quadrants of patients were randomly assigned to SRP at baseline (group 1), SRP at baseline and one month (group 2), SRP plus aPDT at baseline (group 3) and SRP plus aPDT at baseline and one month (group 4). Probing depth (PD), clinical attachment level (CAL) gain, and bleeding on probing (BoP) were measured at baseline, and one and three months later. F. nucleatum counts were determined by PCR. ANOVA was used for the comparison of these variables between the groups.

In all the groups, PD reduction and CAL gain increased significantly at 1- and 3-month intervals compared to baseline (P=0.001). At three months, the difference in PD between groups 1 and 3 was statistically significant (P=0.014). CAL gain between groups 2 and 4 at one month (P=0.016) and three months (P=0.001) wasstatistically significant. Reduction in F. nucleatum counts was not significant between the four study groups (P>0.05).

A combination of two sessions of aPDT and SRP could improve CAL gain; however, further long-term studies are necessary in this regard.

This study compared the root surface roughness following scaling and root planning with manual curettes and different powers of Er:YAG and Er,Cr:YSGG lasers using surface profilometry and scanning electron microscopy (SEM).

 In this in vitro experimental study, 50 extracted teeth were buccolingually sectioned into two halves. The obtained contaminated surfaces randomly received the following treatments: SRP with manual curettes (group I), Er:YAG laser irradiation (4 W) (group II), manual curette+Er: YAG laser (1W) (group III), manual curette+ Er,Cr:YSGG laser (150 mJ) (group IV) and Er,Cr:YSGG laser (250 mJ) (group V). Surface roughness (Ra), surface changes (Rz) and maximum roughness changes (Rmax) were calculated before and after treatment while the surface morphology was examined by SEM analysis. The differences in roughness parameters were statistically analyzed using Wilcoxon signed rank test for each modality.

 Except for the manual curette group (I) in which the roughness parameters decreased significantly (P<0.04 for all), Ra, Rz and Rmax increased in the remaining groups. The reported increases in group II (4W Er:YAG)(P<0.005, P<0.007 and P<0.03, respectively) and group V (250 mJ Er,Cr:YSGG) were statistically significant (P<0.01, P<0.05 and P<0.05).

 Within the limitations of this study, irradiation of Er:YAG and Er,Cr:YSGG lasers at both powers with and without using manual curettes increased surface roughness values compared to using manual curettes alone. Greater roughness values were obtained by increasing the power of lasers.

Atorvastatin (ATV), which belongs to the statin class of drugs, is the formidable inhibitor of 3-hydroxy-2-methyl-glutaryl coenzyme A reductase. This clinical trial evaluated and compared the clinical and radiographic changes in chronic periodontitis (CP) patients, obtained through 1.2% ATV as an adjunct to scaling and root planing (SRP) in the treatment of intrabony defects (IBDs).

Twenty CP patients, with a minimum of one pair of bilateral IBDs, were randomly selected for this split-mouth study. Group 1 included 20 sites treated with SRP and subgingival delivery of a placebo gel, whereas an equal number of sites in group 2 were treated by SRP along with subgingival delivery of 1.2% ATV gel. The plaque index (PI), modified sulcus bleeding index (mSBI), probing pocket depth (PPD) and clinical attachment level (CAL) were evaluated at baseline and 3- and 6-month intervals, while the IBD was assessed at baseline and 6-month interval using cone-beam computed tomography (CBCT). Paired t-test was used to determine statistical significance.

A greater reduction in the mean PPD and gain in CAL was found in group 2 compared to group 1 at 3- and 6-month intervals. Furthermore, a significantly greater bone fill was obtained in group 2 (1.70±0.54 mm) compared to group 1 (0.22±0.43 mm) after six months.

ATV, as an adjunct to SRP, enhanced periodontal regeneration, as a noninvasive way to treat periodontal IBDs.