1,721,137 research outputs found
Effect of Low Level Laser Therapy (LLLT) after tooth extraction in patients trated with bisphosphonates medication: clinical evaluation
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Method to improve passive fit of frameworks on implant-supported prostheses: An in vitro study
No full textThe passivity of the superstructure to the abutments of implant-supported prostheses is necessary for implant-prosthesis success. Improvements are needed in the methods of verifying passivity. The purpose of this in vitro study was to evaluate an inexpensive, easy to make, and userfriendly
device to verify the position of the implant abutment replicas of the definitive cast and to avoid framework misfit before fabrication. Eighty stone devices were constructed on a metal base for the in vitro tests. The horizontal, vertical, and angled positions of the implant replicas were created to simulate misfits. The devices were fitted on the abutment replicas, and their ability to identify misfits was evaluated. A statistical analysis was not indicated, because the probability of fracture of the stone devices was 0 or 1. Two mathematical models were built using computer-aided design software (SolidWorks Premium; Dassault Systèmes SolidWorks Corp), and the finite element method was used (Ansys; ANSYS Inc) to simulate the structural behavior of 2 implant configurations (4 and 6 implants). Horizontal misfits of 150 mm, vertical misfits of 50 mm, and angled misfits of 1 degree were detected during the in vitro tests. Different loads and bone quality in the mathematical models did not change stress in the prosthesis configurations on 4 or 6 implants in a relevant way. In conclusions. the fabricated device was easily able to detect the misfits in accordance with the
defined parameters
EVALUATION OF OCCLUSAL CONTACTS IN THE DENTAL LABORATORY: INFLUENCE OF STRIP THICKNESS AND OPERATOR EXPERIENCE.
No full textSurface Treatments and Functional Coatings for Biocompatibility Improvement and Bacterial Adhesion Reduction in Dental Implantology
Full text linkSurface modification of dental implants is a key process in the production of these medical devices, and especially titanium implants used in the dental practice are commonly subjected to surface modification processes before their clinical use. A wide range of treatments, such as sand blasting, acid etching, plasma etching, plasma spray deposition, sputtering deposition and cathodic arc deposition, have been studied over the years in order to improve the performance of dental implants. Improving or accelerating the osseointegration process is usually the main goal of these surface processes, but the improvement of biocompatibility and the prevention of bacterial adhesion are also of considerable importance. In this review, we report on the research of the recent years in the field of surface treatments and coatings deposition for the improvement of dental implants performance, with a main focus on the osseointegration acceleration, the reduction of bacterial adhesion and the improvement of biocompatibilit
Oral conditions and aptitude to receive implants in patients with removable partial dentures: a cross-sectional study. part I. oral conditions
No full textProgrammed-release intraosseus anesthesia as an alternative to lower alveolar nerve block in lower third molar extraction: a randomized clinical trial
Full text linkBACKGROUND: Intraosseous anesthesia is the process by which an anesthetic solution, after penetration of the cortical bone, is directly injected into the spongiosa of the alveolar bone supporting the tooth. This study aimed to compare the effectiveness of the traditional inferior alveolar nerve block (IANB) and computerized intraosseous anesthesia in the surgical extraction of impacted lower third molars, compare their side effects systemically by monitoring heart rate, and assess patients’ a posteriori preference of one technique over the other. METHODS: Thirty-nine patients with bilaterally impacted third molars participated in this study. Each patient in the sample was both a case and control, where the conventional technique was randomly assigned to one side (group 1) and the alternative method to the contralateral side (group 2). RESULTS: The traditional technique was faster in execution than anesthesia delivered via electronic syringe, which took 3 min to be administered. However, it was necessary to wait for an average of 6 ± 4 min from the execution to achieve the onset of IANB, while the latency of intraosseous anesthesia was zero. Vincent's sign and lingual nerve anesthesia occurred in 100% of cases in group 1. In group 2, Vincent’s sign was recorded in 13% of cases and lingual anesthesia in four cases. The average duration of the perceived anesthetic effect was 192 ± 68 min in group 1 and 127 ± 75 min in group 2 (P < 0.001). The difference between the heart rate of group 1 and group 2 was statistically significant. During infiltration in group 1, heartbeat frequency increased by 5 ± 13 beats per minute, while in group 2, it increased by 22 ± 10 beats per minute (P < 0.001). No postoperative complications were reported for either technique. Patients showed a preference of 67% for the alternative technique and 20% for the traditional, and 13% of patients were indifferent. CONCLUSION: The results identified intraosseous anesthesia as a valid alternative to conventional anesthesia in impacted lower third molar extraction
Autologous plasma rich in growth factors in the socket preservation after tooth extractions in diabetic patients: A split mouth study
No full textBackground: Patients affected by type 2 Diabetes mellitus (DM) have a higher risk of developing of oral diseases than the general population. Plasma-rich growth factor (PRGF) is a technique that transforms a biological and autologous product in a platelet membrane, which can be positioned in the healing site, so that delivers platelet-derived growth factor, and stimulates soft tissue and bone regeneration. The purpose of this study is to evaluate the efficacy of PRGF in post extractive sockets in patients affected by Type 2 DM, evaluating socket reduction, VAS scores, the Healing Index (HI), and patient satisfaction based on answers to a form.
Material and methods: This is a split-mouth study in which each patient also served as the control: the study socket was treated with PRGF, whereas the control socket underwent natural healing. The outcome variables were the Healing Index, residual socket volume, VAS score, postsurgical complications, and outcome of a patient questionnaire. The investigation considered the impact of hyperglycemia, glycated hemoglobin, End Organ Disease Score and smoking habits. 4 weeks of follow-up (we had all healings at 4 weeks so we didn’t continue the study beyond 4 weeks) was considered. Pairs of correlated continuous variables were analyzed with the Wilcoxon test, independent continuous variables with the Mann-Whitney test, and categorical variables with the c2 test or Fisher test.
Results: From January 2017 to December 2017, 58 patients affected by insulin-dependent diabetes mellitus (type 2 Diabetes mellitus (DM)) underwent contemporary bilateral extractions of homologous teeth. The treatment-versus- control postoperative comparison showed that PRGF resulted in significantly smaller residual socket volumes and better Healing Indices from days 3 to 21 (PRGF brings an healing improvement as an increase in wound closure speed statistically significant in all 4 follow ups (p < 0.0001 at 3 days, p < 0.0001 at 7 days, p = 0.0002 at 14 days, p = 0.005 at 21 days)). The patients’ questionnaire outcomes were unanimously in favor of PRGF treatment.
Discussion: PRGF application after extraction improved the healing process in diabetic patients by accelerating socket closure (epithelialization) and tissue maturation, proving the association between PRGF use and improved wound healing in diabetic patients
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