Evaluation of Knowledge and Practice of Yazd General Practitioners about Shade Selection of Fixed Dental Prosthesis in 2019

Introduction: The color matching of dental restorations is effective in the beauty of the smile and a dentist should be familiar with the subject of color and light to make a beautiful and natural prosthesis. The aim of this study was to investigate the knowledge and practice of general dentists in Yazd City about the choice of fixed prosthesis color in 2019. Methods: This was a descriptive-analytical cross-sectional study in which all the general dentists in Yazd City were included in the study by census. Data were collected in the field through a valid and reliable questionnaire containing 11 knowledge questions and 17 performance questions. Data were analyzed by SPSS software version 24 using t-test and ANOVA (α <0.05). Results: 150 dentists with a mean age of 39.14 ± 7.96 were studied in this study. The mean score of knowledge was 26.5 ± 3.32 out of 33 points. Mean knowledge score was not statistically significant with age, sex and dental work experience (P >0.05), but was associated with participation in retraining courses (P = 0.046). 79% of participants used brossage and prophylaxis before choosing a color, 31% used sunlight to choose a color, and 37% used the color of adjacent teeth as a color choice. Conclusion: The knowledge of general dentists in Yazd City in choosing the color of fixed prostheses was at a good level and the performance was relatively good. Participation in retraining courses had led to an increase in dentists' awareness in this field.

Hemisection- A Saviour for Periodontally & Cariously Involved Permanent Mandibular Molar

Progressive carious and inflammatory involvement of teeth if left untreated will ultimately lead the loss of tooth structure in the oral cavity. Earlier clinician was left with no option but extraction of such hopeless teeth followed by replacement with fixed partial denture, removable partial denture or implants. Hemisection is a removal of compromised root and the associated crown portion. It is one of the treatment options for preserving remaining part of molar having sound periodontium. This case report presents a patient in which distal half of the teeth was carious but with sound periodontium and the periodontally compromised mesial root was resected, and after healing, fixed dental prosthesis was delivered to restore proper form and function

Comparative Analysis of Fracture Resistance between CAD/CAM Materials for Interim Fixed Prosthesis

The aim of this study was to evaluate and compare the resistance to fracture of interim restorations obtained through additive techniques (3D impressions) and subtractive techniques (milling) using a computer-aided design and manufacture (CAD/CAM) system of a three-unit fixed dental prosthesis (FDP) to ascertain its clinical importance. (1) Materials and methods: In total, 40 samples were manufactured and divided into two groups (n = 20) using: (1) light-curing micro hybrid resin for temporary crowns and bridges (PriZma 3D Bio Prov, MarketechLabs, São Paulo, Brazil) for the rapid prototyping group (RP) and (2) a polymethylmethacrylate (PMMA) CAD/CAM disc (Vipiblock Trilux, VIPI, São Paulo, Brazil) for the computer-assisted milling (CC). The resistance to fracture was determined with a universal testing machine. (2) Results: The strength and the standard deviation for the computer-assisted milling group were higher (1663.57 ± 130.25 N) than the rapid prototyping (RP) group, which had lower values of (1437.74 ± 73.41 N). (3) Conclusions: The provisional restorations from the computer-assisted milling group showed a greater resistance to fracture than the provisional restorations obtained from the rapid prototyping group.

Pragmatic approach to rehabilitate maxillary teeth in aesthetic zone using resin bonded FDP- A case report

Resin bonded fixed dental prosthesis offers most conservative and cost-effective option with missing teeth in aesthetic zone specially when an implant prosthesis is not indicated. This case report describes a treatment option for the replacement of a missing maxillary central incisor using a double-retainer resin-bonded fixed partial denture (RBFPD), fabricated from zirconium dioxide (ZrO) ceramic. No clinical complications were observed at follow-up examination after placement of the prosthesis. Satisfactory functional and aesthetic results were achieved. A treatment modality using a ZrO ceramic RBFPD is an alternative for single anterior tooth replacement.

Clinical procedures in stage II implant supported fixed dental prosthesis: A case report

Restoring a partially edentulous jaw with implant-supported prosthesis is a challenge. The clinical outcome will be satisfactory only when both the surgical phase as well as the prosthetic phase are planned in advance and executed while keeping in mind the aesthetic and functional necessities. In this case report we describe the steps in successfully restoring the edentulous space with implant supported FP1 prosthesis. The sequential steps that were followed in the prosthetic phase has been described in detail. From the satisfactory outcome of the case, it can be concluded that proper evaluation, prosthetically driven treatment planning and correct execution of the plan would ensure good predictability of the implant-supported prosthesis.

About Cantilevered Resin Bonded Bridges

Resin bonded bridge technique was first introduced in 1963 by Rochette. It was the first type of non-invasive fixed dental prosthesis because the abutment tooth didn’t undergo any prior preparation. As early as 1996, Hussey and Linden studied cantilever resin bonded bridges and showed that there was no significant difference in the survival rates of a conventional bridge and cantilever resin bonded bridges. The main indications for a resin bonded bridge in children are post-traumatic edentulousness, during the early detection of agenesis and pre-implant temporization situations. Resin bonded bridges are also recommended in adults when the implant context is unfavourable or contraindicated (periodontal diseases and / or anatomical and prosthetic obstacles). Cantilever resin bonded bridge has many advantages compared to the traditional bridge: simpler and faster to make, more economical for the patient, easier hygiene and absence of partial detachment that can lead to secondary caries lesion.The preparation criteria will be adapted to the clinical situation, which will take into account the patient's age, the extent of edentulousness, the extent of occlusal loads and dental mobility. Thus, when the joint is subject to excessive stress, retention devices will complete the preparation. With the continuous development of materials as well as new minimally invasive treatment modalities, the alternative solution of the bonded bridge in the anterior region now corresponds to the realization of an all-ceramic zirconia cantilever bridge with a single wing.

Masticatory Ability and Oral Health Related Quality of Life in Partially Edentulous Patients Involving Posterior Teeth after Rehabilitation with Tooth-Supported Fixed Dental Prosthesis

Background: Loss of teeth affects the masticatory ability and overall health of the patient especially posterior teeth as they contribute more to mastication as compared to anteriors. Loss of teeth can lead to undesirable consequences and early rehabilitation with any type of prosthesis can lead to desirable changes and thus missing teeth should be replaced as soon as possible. Aims and Objectives: To determine the change in masticatory ability and quality of life (QoL) after replacement of missing posterior teeth by fixed dental prosthesis. Methodology: Maximum bite force was recorded before and after treatment. Also a self-perceived questionnaire was filled by the patient to assess the change in QoL. Patients with missing posterior teeth were included. Patients with acute infections or systemic diseases were excluded. Results: Significant change (p=0.0001) in both masticatory ability and QoL of the patient was seen. The co-relation of both was clinically significant while statistically non-significant (p=0.77). Results were significant for both the studied parameters but co-relation between them was no significant. It is because of the patients perceived satisfaction of the overall treatment. Conclusion: Rehabilitation of posterior teeth improves mastication and also overall oral health related QoL.