Restoration Strategies of Endodontically Treated Teeth among Dental Practitioners in Saudi Arabia. A Nationwide Pilot Survey

The purpose of this study was to determine dental practitioners’ opinions, techniques, and materials used for the restoration of endodontically treated teeth (ETT) in Saudi Arabia. A comprehensive nationwide survey regarding treatment strategies of ETT, on the post types and material used for core foundations were distributed either by email or by hard copies to general dentists in different parts of Saudi Arabia (North, South, West, East, and Center). Descriptive statistics were used to analyze the responses to the questions. A total of 164 participants were included in the survey: 72.6% of them were male, and 27.4% were female. 42.1% of the participants were Saudi dental practitioners, whereas 57.9% were non-Saudi dental practitioners. Out of the surveyed dentists, 52% consider post placement for almost every post-endodontic restoration of ETT. The majority of the dentists (54%) believe that a post strengthens ETT. Cast posts and cores were used by 55% of all the dentists, whereas 34% used prefabricated posts exclusively. Screw posts were the most popular prefabricated post type (47%). Composite resin (51%) was preferred for the core foundation, followed by glass ionomer cements (GICs) (26%). Amalgam was seldom used (0.5%). Posts were placed primarily with zinc phosphate cement (51%), followed by GIC (38%). Within the limitations of this survey-based investigation among dental practitioners in Saudi Arabia, it was concluded that the treatment strategies of ETT are in accordance with the current state of evidence-based knowledge

Restoration Strategies of Endodontically Treated Teeth among Dental Practitioners in Saudi Arabia. A Nationwide Pilot Survey

The purpose of this study was to determine dental practitioners' opinions, techniques, and materials used for the restoration of endodontically treated teeth (ETT) in Saudi Arabia. A comprehensive nationwide survey regarding treatment strategies of ETT, on the post types and material used for core foundations were distributed either by email or by hard copies to general dentists in different parts of Saudi Arabia (North, South, West, East, and Center). Descriptive statistics were used to analyze the responses to the questions. A total of 164 participants were included in the survey: 72.6% of them were male, and 27.4% were female. 42.1% of the participants were Saudi dental practitioners, whereas 57.9% were non-Saudi dental practitioners. Out of the surveyed dentists, 52% consider post placement for almost every post-endodontic restoration of ETT. The majority of the dentists (54%) believe that a post strengthens ETT. Cast posts and cores were used by 55% of all the dentists, whereas 34% used prefabricated posts exclusively. Screw posts were the most popular prefabricated post type (47%). Composite resin (51%) was preferred for the core foundation, followed by glass ionomer cements (GICs) (26%). Amalgam was seldom used (0.5%). Posts were placed primarily with zinc phosphate cement (51%), followed by GIC (38%). Within the limitations of this survey-based investigation among dental practitioners in Saudi Arabia, it was concluded that the treatment strategies of ETT are in accordance with the current state of evidence-based knowledge

Influence of Thermal and Mechanical Load Cycling on Fracture Resistance of Premolars Filled with Calcium Silicate Sealer

The aim of this study was to evaluate the aging effect of thermomechanical cyclic load on fracture resistance of lower premolars obturated with AH Plus and BioRoot RCS root canal sealers. Forty-eight single-rooted premolars teeth were instrumented with REVO-S files up to SU/0.06 taper. The teeth were randomly assigned into 2 main groups (n = 24) according to the selected two root canal sealers (AH Plus or BioRoot RCS). All teeth were obturated using matching gutta-percha. Each main group were further divided into 3 subgroups (A, B and C) (n = 8). Group A acted as the negative control group (non-Thermomechanical aging). Whereas Group B and C were subjected first to thermal variations in a thermal cycling machine (7500 and 15,000 thermal cycles), then two different dynamic loading periods namely 3 × 105 and 6 × 105 in a masticatory simulator with a nominal load of 5 kg at 1.2 Hz which simulate approximately 1 ½ and 3 years of clinical function respectively. The roots were decoronated and fracture resistance were measured using a universal testing machine. After thermal-mechanical aging, BioRoot RCS showed significantly higher fracture resistance (p p < 0.05). It could be concluded that thermomechanical aging had a significant impact on the outcome of the fracture resistance of AH Plus and BioRoot RCS

Awareness, Knowledge, and Perception of Tooth-Supported and Implant-Supported Prostheses among Adults in Sana’a City: A Survey-Based Study

The study aimed to evaluate knowledge, awareness, and perception of tooth-supported and implant-supported prostheses among an adult sample in Sana’a city in Yemen. A cross-sectional descriptive–analytical study was conducted on a convenient sample of 509 participants. All participants were aged 18 years and above with at least 1 missing tooth. The participants visited the public or private hospitals or their outpatient clinics in the municipality of the capital, Sana’a, Yemen. Their chief complaints when visiting the hospitals were not related to dental problems but to general healthcare. The participants who agreed and signed the consent form were interviewed and examined. The data were then recorded and statistically analyzed. The levels of awareness and knowledge of implant-supported prostheses among the 509 participants were low (58.0%, 33.6%, respectively). A significant positive correlation was found between genders (p = 0.003 for males, p = 0.000 for females), but no significant differences were detected between genders related to the awareness and knowledge of tooth-supported prostheses (p = 0.690). Most of the respondents had a low level of awareness, knowledge, and perception of treatment options for tooth replacement modalities

Influence of long -term thermal cycling and masticatory loading simulation on bond strength of roots filled with epoxy resin and calcium silicate based sealers

Abstract Background The aim of this study was to evaluate the effect of thermal and mechanical cyclic aging using a mastication simulator on push-out bond strength of mandibular premolars obturated with AH Plus and BioRoot RCS root canal sealers. Methods With REVO-S files up to SU/0.06 taper, 48 single-rooted premolar teeth were instrumented. The teeth were randomly divided into two main groups (n = 24) based on the two root canal sealers used (AH Plus and BioRoot RCS). All teeth were obturated with h matched-taper single-cone. Each main group was then subdivided into three subgroups (A, B, and C) (n = 8). Group A served as the negative control group (no-thermocycling aging). While groups B and C were subjected to thermal changes in a thermocycler machine (15,000 and 30,000 thermal cycles, respectively), followed by two different dynamic loading periods, 3 × 105 and 6 × 105 in a masticatory simulator with a nominal load of 5 kg at 1.2 Hz which represent roughly 1½ and 3 years of clinical function respectively. 2 mm slice at 3 levels, apical, middle, and coronal, to obtain 3 sections were prepared and subjected to push-out test using a universal testing machine. Statistical analysis was performed using analysis of variance (ANOVA) followed by a Tukey post hoc comparisons test and an independent T-test. A significance level of 5% was used. Results After thermal–mechanical cyclic aging, the two root canal sealers showed a significantly decreased in push-out bond strength (p < 0.05), however, AH Plus had significantly higher bond strength values than BioRoot RCS after cycling aging. Conclusions It could be concluded that thermal–mechanical cyclic aging had a significant impact on the outcome of the dislodgment resistance of AH Plus and BioRoot RCS

Bibliometric analysis and evaluation of the Journal of Prosthodontic Research from 2009 to 2021.

The Journal of Prosthodontic Research (JPR), the official Journal of Japan Prosthodontic Society, is a leading prosthodontic journal worldwide, ranking in the first quartile (Q1) with an impact factor of 4.642 according to the Journal Citation Report 2020. JPR publishes on a quarterly basis, and the first issue was published in January 2009. Demonstrating the trends and impact of a journal in its field is essential. One approach to this is the “bibliometric analysis,” through which the core research areas, authors, countries, journal

Finite element data (construction, vertical and oblique load, and stress distribution).

Finite element data (construction, vertical and oblique load, and stress distribution).</p

Stress analysis of loading conditions of 200 N vertical and oblique with 45° for all AH Plus cases in different root levels.

Highest and lowest stress values are indicated by red and blue colours, respectively. (a) Von Mises stress in AH Plus with GP under vertical loading (b) Von Mises stress in AH Plus with GP under oblique loading (c) Von Mises stress in AH Plus only under vertical loading (d) Von Mises stress in AH Plus only under oblique loading.</p

Stress analysis of loading conditions of 200 N vertical and oblique with 45° for BioRoot RCS and AH Plus cases without GP.

(a) Von Mises stress in BioRoot RCS only under vertical loading (b) Von Mises stress in BioRoot RCS only under oblique loading. (c) Von Mises stress in AH Plus only under vertical loading (d) Von Mises stress in AH Plus only under oblique loading.</p

Stress analysis of loading conditions of 200 N vertical and oblique with 45° for BioRoot RCS and AH Plus cases with GP.

(a) Von Mises stress in BioRoot RCS with GP under vertical loading (b) Von Mises stress in BioRoot RCS with GP under oblique loading. (c) Von Mises stress in AH Plus with GP under vertical loading (d) Von Mises stress in AH Plus with GP under oblique loading.</p