Does abutment preparation affect abutment screw joint stability? An in vitro study.

Statement of problem. Whether preparation of an implant abutment decreases the stability of the abutment screw joint is unclear

The Assessment of Different Gingival Management Materials for Immediate Implant Treatment in the Esthetic Zone: A Clinical and Biochemical Study

PURPOSE: To observe the effect of different prosthetic materials (polymethyl methacrylate [PMMA] and flowable composite [FC]) on marginal bone loss, pink esthetic score (PES), and cytokine levels (receptor activator of nuclear factor kappa-Β ligand [RANKL] and osteoprotegerin [OPG]). MATERIALS AND METHODS: A total of 46 patients (31 women, 15 men) were treated with immediate implant therapy after tooth extraction. For standardization, only the maxillary premolar tooth of each patient was restored, and also, both of the adjacent teeth were present in the dental arch. Provisional crowns were prepared before the surgery on patient models with two different materials (24 PMMA, 22 FC). Following the surgical procedure, provisional crowns were adjusted on polyetheretherketone (PEEK) abutments as nonfunctional in centric and eccentric movements. After the surgery, patients were evaluated monthly for 3 months. At each follow-up, periapical radiography was obtained by the parallel technique, and peri-implant crevicular fluid (PICF) was collected. Pink esthetic scoring was done. MBL was calculated for the mesial and distal sides separately. Cytokine levels were analyzed from PICF. Statistical analyses (Shapiro-Wilk, Mann-Whitney U, independent-samples t test, Wilcoxon t test, paired-samples t test, and Friedman two-way analysis of variance with Bonferroni correction) were completed (α = .05). RESULTS: PES was increased significantly within groups (P .05). When the RANKL/OPG values were evaluated within the group by using the Friedmann two-way analysis of variance test, no significant difference was found (P > .05). CONCLUSION: Similar pink esthetics, cytokine levels, and bone loss can be achieved using a protocol including immediate implants, particle grafts, soft tissue graft, PEEK abutments, and provisional restorations fabricated using PMMA and FC

Periapikal Lezyonların Yüksek Çözünürlüklü Ultrasonografi ile Görüntülenmesinde Etkili Faktörlerin Belirlenmesi

Amaç: Bu çalışmada panoramik (PR) ve periapikal radyograflarda (PAR) izlenen periapikal patolojilerin görüntülenmesinde ultrasonografi (USG) tekniğinin yararlı olup olmadığını araştırılmasının yanı sıra; görünme üzerine yaş, cinsiyet ile periapikal lezyonun (PAL) boyut ve lokalizasyonunun olası etkisinin belirlenmesi amaçlanmıştır. Ayrıca lezyonun boyutu ile vaskülarizasyon arasındaki ilişkinin olup olmadığının da incelenmesi de amaçlar arasındadır. Gereç ve Yöntem: Çalışma 46 kişi üzerinde yürütüldü. Periapikal lezyonların (PAL) ilişkili olduğu dişler, her bir çene için anterior, premolar ve molar dişler olarak altı grup halinde sınıflandırıldı. PAL’lerin periapikal radyograflardaki MD boyutları, < 5 mm, 6-10 mm arası  ve > 10 mm olacak şekilde  üç grup olarak sınıflandırıldı.  Lezyonların mezio-distal (MD) genişliği ölçülüp ilgili diş numarası ile birlikte kaydedildi. USG incelemelerinin tamamı (Aplio™ 500; Toshiba Medical Systems Corporation, Otawara, Japan) B-Mod ve yüksek frekanslı (7-18 MHz; PLT-1005BT) veya (14-7.2 MHz; PLT-1204BT) lineer tarama probları kullanılarak gerçekleştirildi. Ultrasonografik olarak transvers yönde görüntülenen periapikal lezyonların MD boyutu ölçülüp kaydedildi. Renkli doppler USG ile de PA lezyonların vaskülarizasyonları değerlendirildi. PAL’lerin MD boyutları üç farklı görüntüleme yöntemiyle (PAR, PR ve USG) ölçüldü ve ikili uyumları karşılaştırıldı.Bulgular ve Sonuç: PAL’lerin lokalizasyonlarının, USG’de görünebilir olmaları üzerinde etkili olduğu saptandı (p < 0.001). Bölgelere göre bakıldığında, maksiller anterior bölgedeki lezyonların rahatlıkla görünebildiği, maksiller premolar ve mandibular molar bölgedeki lezyonların ise USG ile görüntülenemediği belirlendi. Ayrıca, lezyon boyutu ile renkli doppler USG vaskülarizasyon bulguları arasında da bir ilişki izlenmedi (p > 0.05). Anahtar kelimeler: Panoramik radyografi, Periapikal lezyon, Periapikal Radyografi,  Ultrasonograf

The clinical and systemic effects of periodontal treatment in diabetic and non-diabetic obese patients

The purpose of the present study was to evaluate the response to periodontal management in obese individuals with poorly controlled diabetes mellitus (DM) and obese individuals without DM. Changes in clinical and biochemical parameters were also investigated. Seventeen obese patients with poorly controlled DM and 14 obese non-DM patients with generalized chronic periodontitis were enrolled. The anthropometric measurements, periodontal parameters, and serum levels of lipid (triglyceride, high-density lipoprotein cholesterol, total cholesterol, low-density lipoprotein cholesterol) and glucose (fasting plasma glucose IFPGI, insulin, insulin resistance 1111, hemoglobin [Hb]A1c) metabolism, pro-inflammatory mediators (high-sensitivity C-reactive protein, tumor necrosis factor-alpha [TNF-alpha] and Pentraxim-3), and interleukin-6 were measured before and at 3 months, and 6 months after full-mouth scaling and root planing (FM-SRP) together with full mouth disinfection (FMD). A significant reduction in TNF-alpha (P < 0.001) values was observed in both groups following periodontal healing. However, significant changes in FPC (P < 0.05), HbA1C (P < 0.05), and the homeostasis model assessment of IR (HOMA-IR; P < 0.05) were only observed after 3 months in the DM group. Our findings suggest that obesity with or without DM does not seem to be a modifying factor for the clinical outcome of FM-SRP and FMD

What is the rate of tobacco usage among dental school students?

Introduction This survey aimed to investigate the rate of students in dental schools that use various tobacco products and possible factors affecting their attitudes towards tobacco products. Methods The survey was conducted between May 1 and June 30, 2018 and participants were from ten dental schools in Turkey. First year students and fifth year students were compared in terms of tobacco product usage and their attitudes towards tobacco. Data were tested statistically using Statistical Package for Social Sciences (SPSS) 15.0 program and chi-square test. Results A total of 1228 students from eleven different dental schools completed the online survey. Majority of the participants were females (62.1 %) and males were less (37.9 %). Mean age of the participants was 21.8±2.9 years (min-max; 18-54 years). The overall rate of current smokers was 38.11%, but 56.6% of the participants have inhaled tobacco smoke. More than half (55.3%) of the current smokers stated that they wish to quit and 36.7% of these students have attempted to quit within the last six months. More than 10% of all participants defined themselves as highly addicted to cigarette smoking. The rate of waterpipe smokers were 41.2% and 83.7% of these students were not willing to stop waterpipe smoking. Conclusions The rate of current tobacco smokers is rather high among dental school students and this finding points out the need for more effective precautions against tobacco. Funding This study has been funded solely by the institutions of the authors