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European Journal of Prosthodontics and Restorative Dentistry

Ayman Aljawad, Jeremy Simon Rees
OBJECTIVE: This retrospective study was undertaken to evaluate the clinical performance of direct composite restorations placed at an increased vertical dimension to manage localised anterior tooth wear using the Dahl approach. SUBJECTS AND METHODS: Two hundred and ninety six restorations were placed at an increased OVD in 41 subjects with localized anterior Tooth Surface Loss (TSL) were included. Survival analysis was carried out at three levels, major failure only, minor failure only and all types of failure...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
Shahram Namjoy Nik, Touraj Nejatian
Clinical efficiency of one-piece screw-type implants with telescopic were attachments evaluated in this study. Twenty-four patients received a mandibular implant-supported overdenture and maxillary complete denture. Ninety-six one-piece implants were inserted in the inter-foraminal area. Implants were immediately loaded with an implant-retained overdenture and telescopic attachments which had frictional retention elements. There was 0.25±0.24 mm, 0.32±0.25 mm, 0.43±0.30 mm, 0.61±0.30 mm and of bone resorption after 3, 6, 12 and 24 months, respectively...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
Zahra Almuallem, Sinead McDonnell, Antoniella Busuttil-Naudi, Ario Santini
The aims of this study were to assess the light energy transmission and Vickers hardness (VH) ratio of two bulk-fill resin-based composites (RBCs) (Tetric EvoCeram and Filtek) cured at different distances between the light curing unit's (LCU) tip and the surface of the restoration (T-S) using either a Bluephase G2, Bluephase® 'turbo tip' or Bluephase Style LCU. Samples were cured from the top at T-S distances of 2mm, 6mm and 10mm for 20 seconds. A MARC-Resin-Calibrator™ recorded the transmitted irradiance reaching the bottom of the sample, in real time...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
Thomas Haenel, Berenika Hausnerová, Johannes Steinhaus, Ing Bernhard Moeginger
This study investigates two technically simple methods to determine the irradiance distribution of light curing units that governs the performance of a visible-light curing resin-based composites. Insufficient light irradiation leads to under-cured composites with poor mechanical properties and elution of residual monomers. The unknown irradiance distribution and its effect on the final restoration are the main critical issues requiring highly sophisticated experimental equipment. The study shows that irradiance distributions of LCUs can easily be determined qualitatively with generally available equipment...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
Nader Abdulhameed, Jean-Francois Roulet, Chiayi Shen
To evaluate the effect of Dentaurum Grid Strengthener on flexural strength and modulus of two types of PMMA, 24 beams (75 mm x 10 mm x 2.5 mm) containing bonded and flattened Grid Strengthener and 24 beams without Grid Strengthener were subjected to a 3-point bending test at 5 mm/min. Flexural strength and modulus were calculated. Data were analyzed with a 2-way ANOVA. The highest mean strength and flexural modulus was measured for reinforced high impact resin (96.2±14.3 MPa and 3425±779 MPa, respectively)...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
Maryam Mohajerfar, Elaheh Beyabanaki, Allahyar Geramy, Hakimeh Siadat, Marzieh Alikhasi
PURPOSE: This study investigated the influence of placing implant-supported crowns on the torque loss of the abutment screw before and after loading. MATERIAL AND METHODS: Twenty implant-abutment assemblies were randomly assigned to two groups. The first group was consisted of abutments with abutment-level finishing line (abutment-level), and in the second group the crown margin was placed on the implant shoulder (implant-level). Initial torque loss was recorded for all specimens...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
Dinusha Goonawardhana, Roy Judge, Joseph Palamara, Jaafar Abduo
This study aimed to evaluate the impact of implant diameter and alloy on peri-implant strains. Three implant types were investigated: regular commercially pure titanium (RcpTi), narrow commercially pure titanium (NcpTi) and narrow titanium-zirconium alloy (NTi-Zr) implants. Strain gauge models were fabricated from epoxy resin. All the implants were loaded in identical fashion. The greatest peri-implant strains were recorded around NTi-Zr implants, followed by NcpTi implants. The RcpTi implants were associated with the least strain values...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
Rucha Shah, Deepika Shree Lakshmi Penmetsa, Raison Thomas, Dhoom Singh Mehta
Titanium has been considered as one of the most biocompatible metals. Studies testing its corrosion resistance have proposed that the titanium oxide layer formed on the metal surface is lost under certain unavoidable conditions to which it is exposed in the oral environment. This questions its property of corrosion resistance in the oral cavity. Hence, there is a need to understand the mechanisms of corrosion, which can help in the long-term stability and function of implants. Here, we review the possible pathways of corrosion of titanium in the oral cavity, its implications and proposed methods of prevention of corrosion...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
Shivani Kohli, Shekhar Bhatia
Sir, I write in regard to Nayar S et al article 'The Effect of a Radiation Positioning Stent (RPS) in the Reduction of Radiation Dosage to the Opposing Jaw and Maintenance of Mouth opening after Radiation Therapy'. I wholeheartedly agree to that patients undergoing radio-therapy who had an Radiation Positioning Stent (RPS) would show a significant reduction in radiation dosage to the opposing jaw and maintained their mouth opening in the short-term. As we know that oral cancer has emerged to be one of most deadliest cancer nowadays...
December 2016: European Journal of Prosthodontics and Restorative Dentistry
Marco Antonio Bottino, Regina Furbino Villefort Rocha, Lilian Costa Anami, Mutlu Özcan, Renata Marques de Melo
This case report presents a retrieval analysis of a screw-retained one-piece restoration with the veneering ceramic fired directly onto the zirconia abutment that fractured during insertion. A patient who experienced root fracture of a maxillary left central incisor received a titanium implant on the same day as extraction. After delayed implant loading, a two-piece zirconia abutment with metallic insertion was customized. Upon installation, a horizontal fracture of the crown just above the metallic portion was detected...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
Zülfikar Demirtag, Recep Uzgur, Mustafa Turkal, Zeynep Uzgur, Hakan Çolak, Mutlu Özcan
This study evaluated the prevalence and causes of post-cementation sensitivity and possible prevention measures according to the experience of dentists through an internet survey. A questionnaire was prepared with 25 items based on a survey introduced by Rosenstiel and Rashid. An online site was created for the participation to the survey. A total of 322 participants responded the questionnaire. The results of the questionnaire indicated the amount of tooth preparation (42.1%) is the most frequent reason for hypersensitivity followed by water-cooling with pressure (11...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
F J Trevor Burke, Russell John Crisp, Ditesh Panchal, Philip Redfearn, Peter Sands
OBJECTIVE: To evaluate the handling, by a group of practice-based researchers, of a recently introduced bulk fill resin-based composite restorative material, Filtek Bulk Fill Restorative (3M ESPE). METHODS: The twelve selected evaluators were sent explanatory letters, a pack of the material under investigation to use for 8 weeks, and a questionnaire. RESULTS: The evaluators rated the ease of use of the bulk fill restorative the same as the previously used posterior composite material...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
Aida Meto, Agron Meto, Bora Bimbari, Kastriot Shytaj, Mutlu Özcan
This study evaluated the effects of Albanian propolis on the inflamed pulpal tissue after pulpotomy in piglets. In five piglets, two teeth each were infected using special pathogenic microbial flora that was prepared in advance in order to cause inflammation of the pulp. Pulpotomy was performed in the maxillary and mandibular central and lateral incisors. Microbial flora pathogenesis prepared from the section of infected teeth, containing Staphylococcus aureus, Streptococcus viridans, Enterococcus faecalis, Staphylococcus albus and mixed flora were used to cause artificial pulpitis...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
Maan Alshaafi, Mohammed AlQahtani, Richard Price
This study evaluated the effect of light-curing through two ceramics on the degree of conversion-(DC) and Knoop microhardness-(KHN) of resin cements. Three shades were used and light-cured directly on a Golden Gate attenuated total reflectance FT-IR plate at 30°C. KHN was tested immediately and after 24-h. Resin shade, type of ceramic, and storage time all had significant effects on the DC and KHN values. Within each shade, the choice of ceramic always had a significant effect, but the shade of the resin had a greater effect...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
Carlo Monaco, Martin Rosentritt, Altin Llukacej, Paolo Baldissara, Roberto Scotti
This study evaluated marginal adaptation before and after thermomechanical (TCML) loading, gap width and fracture strength of all-ceramic single crowns, as compared to porcelain-fused-to-metal (PFM). Thirty extracted premolars were prepared with a round shoulder of 1.0 mm depth. Specimens were restored with zirconia-ceramic (Group 1), lithium disilicate (Group 2) and metal-ceramic single crowns (Group 3). The replica of each sample was observed with a scanning electron microscope (SEM) to evaluate the crown-cement (c-c) and tooth-cement interface (t-c)...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
Kathryn Shaw, Ricardo Martins, Mohammed Abdul Hadis, Trevor Burke, William Palin
A majority of dental materials are manufactured by companies who have experience in the field. However, a number of "own label" materials have become available, principally marketed by distributors and other companies with little or no experience in the field. These materials are attractive because of their reduced cost, but they may have no research on which clinicians might base their potential performance. It is therefore the purpose of this work to compare the performance of different batches of a number of "own-label" dental materials with a similar number from manufacturers with experience in the field, using a variety of laboratory test regimes which include filler determination, degree of conversion, flexural strength and flexural modulus, in order to evaluate key material properties...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
Alfredo Mikail Melo Mesquita, Alberto Noriyuki Kojima, Elcio Madaglena Giovani, Cintia Helena Coury Saraceni, Flávia Pires Rodrigues
The first choice for anterior rehabilitation has been metal-free materials due to their successful aesthetic results. However, the definitive clinical work accuracy may be affected by the lack of clinicians' expertise and familiarization with the latest techniques, as well as recurrent laboratory procedures. This manuscript presents a clinical experience with zirconia ceramic for anterior crowns and zirconia CAD/CAM abutments, including both clinical and laboratory steps after the implant installation. The 'emergence profile' and the 'double scanning' techniques obtained by the waxing technique appear to be a very promising procedure for aesthetic improvement of the single-implant zirconia restoration in anterior teeth...
June 2016: European Journal of Prosthodontics and Restorative Dentistry
Suresh Nayar, Rachel Brett, Naomi Clayton, Jenny Marsden
The effect of a radiation positioning stent (RPS) in radiation dosage reduction to the opposing jaw and maintenance of mouth opening was audited. 55 Head and Neck cancer patients who received radiotherapy were reviewed. Radiation dosages at similar points in the primary/opposing jaws were measured along with the mouth opening. Results showed a significant reduction in the radiation dosage to the opposing jaw in patients given the RPS. Mouth opening was generally maintained in patients given the RPS (77.7% improvement in mouth opening) compared to patients without RPS...
June 2016: European Journal of Prosthodontics and Restorative Dentistry
Morakot Piemjai, Mutlu Özcan, Franklin Garcia-Godoy, Nobuo Nakabayashi
This study evaluated the conditions of the non-invasive resin-bonded fixed dental prostheses (FDP) and patient satisfaction up to 10 years of clinical function. A total of 23 patients who required fixed prostheses in the areas of mandibular anterior and premolar, and maxillary anterior region received resin-bonded restorations between 1999-2003. In 13 patients with 14 edentulous areas were restored with an adhesive pontic (natural tooth, acrylic and porcelain). Two indirect proximal veneers using resin composite were placed in each space in 10 patients having 13 edentulous spaces...
June 2016: European Journal of Prosthodontics and Restorative Dentistry
Ciaran Moore, Simon Killough, Neill Markey, Lewis Winning, Gerald McKenna
This study aimed to collect data on the oral health status of patients undergoing treatment for head and neck oncology across Northern Ireland. Data were collected on all patients referred to the Northern Ireland Multidisciplinary Head and Neck Oncology Team for discussion and treatment planning. Each patient underwent pre-treatment dental assessment in the Centre for Dentistry, Queen's University Belfast, between June 2013 and November 2014. Data were collected from clinical oral examinations supplemented with intra-oral radiographs...
June 2016: European Journal of Prosthodontics and Restorative Dentistry
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