Evaluation of periodontal parameters on abutment teeth rehabilitated with single-unit crowns: A 12-month follow-up.

Purpose: This prospective study evaluated the effects of the metal-free crowns on the periodontal tissues of abutment teeth during a 12-month follow-up. Materials and Methods: A sample of 24 patients (N = 32 abutment teeth) who needed a single-tooth restoration were enrolled to receive either a metal-ceramic (n = 21) or lithium disilicate (n = 11). The single-unit crowns were evaluated at baseline, 3-and 12-month follow-up. The periodontal parameters were evaluated: plaque index (PI), gingival bleeding index (GBI), bleeding on probing (BOP), probing depth (PD), clinical attachment loss (CAL), radiographically and clinical crown fitting, bone resorption, and marginal finish lines. Statistical analyses were performed using the Exact Fisher and Mann-Whitney tests, and the Wilcoxon signed-rank test as a post hoc test for Friedman (95 % confidence interval). Results: The marginal finish line showed a statistical difference with a biomaterial type (p =.004). After a 12-months, a significant increase was observed in PI and mean PD for abutment teeth of metal-ceramic crowns. The metal-free crowns presented higher values for GBI and CAL (p2 < 0.05). Only distal cervical evaluation and dental biofilm formation in the abutment teeth showed a statistical difference between the groups at the 12-month follow-up. The supragingival margin metal-ceramic group revealed higher PI values (p2 = 0.005) between the period and the subgingival margin of both biomaterials showed greater GBI scores (p2 < 0.05). Conclusions: Metal-free crowns showed better periodontal outcomes compared to metal-ceramic crowns. Single-unit crown marginal location affects the periodontal tissue condition of the abutment teeth. The marginal fit was not changed regarding the biomaterial type.

Efficacy of ILIB on periodontal clinical parameters and glycemic control in patients with periodontitis and type II diabetes-randomized clinical trial.

Our study aimed to study the efficacy of ILIB on periodontal parameters and glycemic control in patients with periodontitis and type II diabetes. Twenty-one patients in a randomized clinical trial were divided into 2 groups: control group (CG), conventional periodontal therapy, and test group (TG), conventional periodontal treatment associated with 10 laser applications by the ILIB-Modified (ILIB-M) technique. Fasting blood glucose levels and glycated hemoglobin (HbA1c), visible plaque index (VPI), gingival bleeding index (GBI), and periodontal clinical parameters were evaluated at baseline and after 4 months (T4). Regarding periodontal parameters, the intragroup analysis showed a statistically significant reduction (p < 0.05) between baseline and T4, for the VPI, GBI, BOP, PD, and CAL indexes. However, in the intergroup analysis, no statistically significant improvements (p > 0.05) were observed between the TG and CG for the VPI, GBI, BOP, PD, and CAL indexes. Regarding HbA1C and fasting blood glucose values, no statistically significant improvements were observed in intergroup and intragroup analyses (p > 0.05). The Modified ILIB did not improve the periodontal clinical parameters and glycemic control in patients with type II diabetes.

Efficacy of antimicrobial photodynamic therapy with chloro-aluminum phthalocyanine on periodontal clinical parameters and salivary GSH and MDA levels in patients with periodontitis.

The purpose of this study was to evaluate the efficacy of antimicrobial photodynamic therapy (aPDT) with chloro-aluminum phthalocyanine (AlClPc) on several periodontal parameters includingsalivary glutathione (GSH) and MDA (malondialdehyde) levels in periodontal sites presenting with periodontitis. Randomized clinical trial, comprising 40 test group (TG) sites and 23 control group (CG) sites. The TG was treated with scaling and root planning (SRP) and aPDT, and CG, only with SRP. Visible plaque index [VPI], gingival bleeding index [GBI], bleeding on probing [BOP], probing depth [PD] and clinical attachment level [CAL] were calculated and saliva samples were taken at baseline (T0), three (T3) and six months (T6). Data was analyzed by the Wilcoxon and Mann-Whitney tests. An intragroup analysis indicated significant differences at T3 and T6 for GBI, CAL and GSH only in the CG (p < 0.05). For BOP, a significant decrease was observed only in the TG between T0 and T6 (p = 0.008). No significant differences were observed for VPI, BOP and MDA. In the intergroup analysis, significant differences were observed for GBI at T6 (p = 0.041), and for GSH at T3 (p = 0.031), being higher in the TG. Although aPDT with AlClPc did not present statistically proven benefits, but the employed periodontal treatment resulted in decreased BOP, PD, CAL and MDA after 3 and 6 months of treatment. In addition, the lower need for glutathione production may initially suggest an additional benefit of AlClPc aPDT in the early reestablishment of the balance between oxidative and non-oxidative agents related to oxidative stress.