Published Articles
Here are some of the published articles by both Dr. Daniel & Dr. Abi Nader:
Date: April 2017
Researchers
- Samer Abi-Nader
- Nach G Daniel
- Wu X
- Al-Abedalla K
- Nicolau
- Tamimi
Abstract
Proton pump inhibitors (PPIs) have a negative impact on bone accrual. Because osseointegration is influenced by bone metabolism, this study investigates the association between PPIs and the risk of osseointegrated implant failure. This retrospective cohort study included a total of 1,773 osseointegrated dental implants in 799 patients (133 implants in 58 PPIs users and 1,640 in 741 non-users) who were treated at the East Coast Oral Surgery Clinic in Moncton, Canada, from January 2007 to September 2015. Kaplan-Meier estimator was used to describe the hazard function of dental implant failure by PPIs usage. Multilevel mixed effects parametric survival analyses were used to test the association between PPIs exposure and risk of implant failure adjusting for potential confounders. The failure rates were 6.8% for people using PPIs compared to 3.2% for non-users. Subjects using PPIs had a higher risk of dental implant failure (HR = 2.73; 95% CI = 1.10–6.78) compared to those who did not use the drugs. The findings suggest that treatment with PPIs may be associated with an increased risk of osseointegrated dental implant failure.
Date: October 2016
Researchers
- Abi-Nader S
- Afrashtehfar KI
- Emami E
- Ahmadi M
- Eilayyan O
- Tamimi F
Statement of problem. No knowledge synthesis exists concerning when to use a direct restoration versus a complete-coverage indirect restoration in posterior vital teeth.
Purpose. The purpose of this systematic review was to identify the failure rate of conventional single-unit tooth-supported restorations in posterior permanent vital teeth as a function of remaining tooth structure.
Date: April 2016
Researchers
- S. Abi-Nader
- K. I. Afrashtehfar
- H. Eimar
- R. Yassine
- F. Tamimi
Abstract
Introduction: Evidence-based dentistry (EBD) can help provide the best treatment option for every patient, however, its implementation in restorative dentistry is very limited. Objective: This study aimed at assessing the barriers preventing the implementation of EBD among dental undergraduate and graduate students in Montreal, and explore possible solutions to overcome these barriers. Materials and methods: A cross-sectional survey was conducted by means of a paper format self-administrated questionnaire distributed among dental students. The survey assessed the barriers and potential solutions for implementation of an evidence-based practice. Results: Sixty-one students completed the questionnaire. Forty-one percent of respondents found evidence-based literature to be the most reliable source of information for restorative treatment planning, however, only 16% used it. They considered that finding reliable information was difficult and they sometimes encountered conflicting information when consulting different sources.
Date: April 7, 2016
Researchers
- Dr. Samer Abi Nader
Abstract
In an effort to keep you informed about CE opportunities available in Canada, we are pleased to offer a series of videos presented by prominent speakers who will lead CE sessions at the Ontario Dental Association’s Annual Spring Meeting ‘ASM 2016’ which will take place May 5 – 7, 2016.
Date: March 2016
Researchers
- Samer Abi-Nader BSc, DMD, MSc, FRCD(C)
- Nach G. Daniel BSc, MSc, FRCD(C)
- Xixi Wu DDs, MSc, PhD,
- Khadijeh Al-Abedalla DDS, MSc
- Hazem Eimar DDS, MSc, PhD,
- Sreenath Arekunnath Madathil PhD,
- Belinda Nicolau DDS, MSc, PhD,
- Faleh Tamimi DDS, MSc, PhD
Abstract
Antihypertensive drugs in general are beneficial for bone formation and remodeling, and are associated with lower risk of bone fractures. As osseointegration is influenced by bone metabolism, this study aimed to investigate the association between antihypertensive drugs and the survival rate of osseointegrated implants.
Date: December 2015
Researchers
- Samer Abi-Nader
- Henry Ghanem
- Kelvin Ian Afrashtehfar
- Faleh Tamimi
Abstract
PURPOSE. A survey was conducted to assess the impact of a TED-like educational session on participants’ willingness to accept dental implant therapy.
MATERIALS AND METHODS. Volunteers interested in having information about dental implant therapies were recruited and asked to complete a two-part survey before and after an educational session. The initial survey elicited demographic information, self-perceived knowledge on dental implants and willingness to this kind of treatment. A “TED-style” presentation that provided information about dental implant treatments was conducted before asking the participants to complete a second set of questions assessing the impact of the session.
Date: October 2015
Researchers
- Samer Abi Nader
- Nach G Daniel
- Eimar H
- Momani M
- Shang K
- Tamimi F
Abstract
Maxillary prostheses supported by four implants, following the All-on-4™ principles, have become an accepted effective treatment for totally edentulous patients. Maintaining the hygiene of such fixed implant-supported prostheses is challenging. The purpose of this clinical study was to evaluate the distribution of plaque on the fitting surface of All-on-4 fixed prostheses in order to find new strategies for maintaining their hygiene. Twenty All-on-4 maxillary fixed prostheses collected from 20 patients, 6 months after delivery, were stained with methylene blue to disclose plaque accumulation at the fitting surfaces of the prostheses. Digital photographs of the fitting surfaces of the prostheses were recorded and processed. The distribution of accumulated plaque was evaluated statistically.
Date: June 2015
Researchers
- Samer Abi Nader
- Nach G Daniel
- Al-Abedalla K
- Torres J
- Cortes AR
- Wu X
- Tamimi F
Abstract
Bone allograft onlays have great potential in alveolar bone augmentation. However, no comparable cohort study is available in the literature showing whether implants placed in bone augmented with allograft onlays would have a success rate comparable to those placed in native alveolar bone. The objective of the cohort study was to investigate whether the quality of bone augmented with allograft onlays was sufficient to place dental implants and achieve success rates comparable to those in un-grafted bone. Two cohort studies were performed in 46 and 369 patients, respectively. In the first study, the quality and quantity of bone augmented with allograft onlays (21 patients received 68 allograft onlays) were assessed and compared with those of native alveolar bone (25 patients) using histologic techniques. In the second study, the performance of implants placed in allograft-augmented bone (16 patients) was assessed and compared with implants placed in autograft-augmented bone (43 patients) and native alveolar bone (310 patients).
Date: May 2015
Researchers
- Samer Abi Nader
- Cooper LF
- Reside G
- Stanford C
- Barwacz C
- Feine J
- Scheyer ET
- McGuire M
Abstract
The implant-abutment interface may affect peri-implant mucosal architecture, and influence health and esthetics. The goal of this 1-year follow-up report of a 5-year clinical investigation was to examine the peri-implant mucosal tissue responses to different implant-abutment interface designs. Subjects requiring an anterior maxillary implant were recruited. Tooth extractions, with or without preservation or ridge augmentation procedures, were performed as required. After 5 months of healing, one of three different implant-abutment combinations …
Date: August 2014
Researchers
- Samer Abi Nader
- Eimar H
- Siciliano R
- Abdallah MN
- Amin WM
- Martinez PP
- Celemin A
- Cerruti M
- Tamimi F
Abstract
Objectives: The mechanism of tooth bleaching using peroxide oxidizers is not fully understood. It is unknown whether peroxide radicals make teeth whiter by deproteinizing, demineralizing, or oxidizing tooth tissues. This study was designed to define the mechanism of tooth bleaching and determine which of tooth enamel chemical components is/are affected by bleaching
Date: August 2014
Researchers
- Abi Nader S
- Jabbour Z
- Fromentin O
- Lassauzay C
- Correa JA
- Feine J
- de Albuquerque Junior RF
Abstract
Purpose: Attachment wear can affect the performance of mandibular two-implant overdentures (IODs). This prospective clinical study aimed to investigate the effect of interimplant angulation on the retention achieved by two attachment systems at different time points within 1 year of wearing IODs. Materials and methods: Twenty-four patients (mean age = 73.2 years; standard deviation (SD) = 3.1) wearing IODs opposed by conventional maxillary complete dentures were randomly assigned to two groups in two-by-two crossover design. Retentive Anchor (RA) and Locator (LA) were installed in the IODs of both groups for 1 year, sequentially.
Date: November 2011
Researchers
- Abi Nader S
- Eimar H
- Marelli B
- Nazhat SN
- Amin WM
- Torres J
- de Albuquerque RF Jr
- Tamimi F
Abstract
Tooth shade is influenced by a combination of extrinsic-stains that are adsorbed to the enamel surface and by its intrinsic-shade resulting from the interaction of light with tooth structures. This study was designed to investigate how the variations in enamel ultrastructure may affect tooth optical properties. One-hundred extracted teeth were collected from adult patients attending McGill-Undergraduate Dental Clinics. Shade-spectrophotometry, FTIR and XRD were used to assess tooth shade, enamel chemical composition and crystallography.
Date: December 2002
Researchers
• Nach G. Daniel, DMD, BSc, MSc
• Jacques Goulet, DMD
• Marc Bergeron, MD, FRCPC
• Robert Paquin, DMD, FRCD(C)
• Pierre-Éric Landry, DMD, FRCD(C)
Abstract
Acetylsalicylic acid has long been the only nonsteroidal anti-inflammatory drug recommended for the treatment and prevention of thromboembolic diseases. More recently, new compounds have been used in patients with vascular diseases. However, these drugs are often associated with longer bleeding times and greater operative risk. In most surgical specialties, the question always arises as to whether antiplatelet therapy should be stopped before elective surgery. If so, for how long? If not, what are the risks?