Journal of Islamic Dental Association of IRAN
Volume:35 Issue: 1, Winter-Spring 2023

This study aimed to compare the microshear bond strength (µSBS) of two types of universal adhesives to primary dentin following self-etch (SE) and total-etch (TE) techniques.

In this in vitro experimental study, 50 extracted sound primary first and second molars were randomly assigned into five groups (n=10). The groups were treated as follows: All Bond Universal (ABU) using the self-etch (SE) technique, Scotchbond Universal (SBU) using the SE technique, ABU using the total-etch (TE) technique, SBU using the TE technique, and Adper Single Bond 2 (ASB2) as the control group, after exposing the occlusal dentinComposite cylinders were bonded to dentin and underwent µSBS test. Data were analyzed by two-way ANOVA and Tukey’s test (alpha=0.05).

All experimental groups showed significantly lower µSBS than the control group (P<0.05). However, the difference in µSBS was not significant among the experimental groups (P>0.05).

The results showed higher µSBS of ASB2 (fifth-generation adhesive) than both universal adhesives (SBU and ABU) in SE and TE techniques. The µSBS to primary dentin depended on both adhesive type and technique.

The present study investigates the oral health-related quality of life in asthmatic children aged 8-14 years old in Sari city.

Methods and Material: 

In this case control study, the DMFT and oral health-related quality of life of 56 children aged 8-14 years were investigated (n=28 for each group). The asthma grade of each patient, the duration of asthma, the type of corticosteroid used, and the smoking habits of the parents were recorded in the individual's questionnaire after interviewing and obtaining the relevant information. Children were examined and their dmft/DMFT ratio was recorded. Statistical tests such as Chi-square, Mann-Whitney U, Kruskal-Wallis, and Spearman’s correlation were used.

The results showed that the quality of life in asthmatic children was significantly lower than in the control group, and the dmft/DMFT ratio was higher (P<0.001). Additionally, a reduction in quality of life and an increase in the dmft/DMFT ratio were significantly associated with increased asthma severity. There were no significant differences in quality of life and the dmft/DMFT ratio between children with smoker and non-smoker parents (P=0.852 and P=0.887, respectively). Overall, there was a negative correlation between oral health-related quality of life and the dmft/DMFT ratio (0.76).

The oral health-related quality of life and the dmft/DMFT ratio in children with asthma are suboptimal. Additionally, having smoker parents does not affect the quality of life and history of tooth decay in these children.

The purpose of the case report was to describe missed diagnosis of a deep palatogingival groove (PGG) associated with an endodontic-periodontal lesion which was subsequently managed using a regenerative surgical procedure.

Clinical considerations:

 The PGG often predisposes the teeth to severe periodontal defects and pulp necrosis which complicates the diagnosis. This case illustrated a persistently sensitive tooth that was initially diagnosed as a combined endodontic-periodontal lesion, with an associated PGG identified at a later stage. The collaborative management of combined endodontic-periodontal lesion with endodontic therapy, ultrasonic debridement of groove, sealing with MTA and composite resin, and guided tissue regeneration resulted in substantial healing of the periradicular radiolucency at 24 months.

It is imperative to exercise caution during the biomechanical preparation of the root canal, when there is a reduced amount of dentin between the PGG and the root canal wall to prevent potential complications and ensure the integrity of the remaining tooth structure.

The aim of this study was to gather available scientific data on appropriate occlusal scheme in each type of fixed implant restoration with the least adverse effect on implant and peri-implant tissues.

Study Selection: 

An extensive search was performed in PubMed, Scopus, Embase, and Google Scholar using related keywords. Studies related to evaluation of different occlusal schemes, and occlusion in implant dentistry were selected, reviewed, and discussed.

The selected keywords yielded 995 search results in PubMed, 417 in Embase, and 500 in Scopus. After duplicate removal and title/abstract analysis, 83 studies were selected for full-text review. Finally, 43 studies met the requirement of inclusion/exclusion criteria and were included.

Selecting the right occlusal scheme for implant restorations is complex. Clinicians must consider multiple factors to prevent occlusal overloading. Following scientific guidelines ensures long-term success and predictability in implant-supported prostheses.

The aim of this study was to analyze the available evidence on external apical root resorption (EARR) due to orthodontic movement to identify clinical and molecular factors associated to this condition.

An umbrella review was conducted, encompassing systematic reviews and meta-analyses. Four databases—PubMed, ScienceDirect, Scopus, and Cochrane—were searched. The reviews were critically evaluated according to PRISMA and AMSTAR-2 guidelines. The study protocol was registered with PROSPERO (CRD42020198971).

Totally, 124 papers were considered eligible for this investigation. Following title and abstract screening, 10 papers (4 systematic reviews and 6 meta-analyses) were included. The AMSTAR-2 guideline was applied, and the evaluation was conducted in accordance with PRISMA guidelines. Factors such as female gender, adulthood, conventional fixed orthodontic treatment, heavy, continuous and prolonged loads, intrusive movements and anterior superior teeth with abnormal roots increased the risk of developing this condition. At the molecular level, biomarkers such as IL-1β, IL-6, IL-4, and dentin phosphoprotein (DPP) were considered crucial for early diagnosis of external root resorption (ERR). Notably, the IL-1β (+3954) gene polymorphism was the most significant predictor of this condition in patients undergoing orthodontic treatment.

Clinical and molecular factors, which are influenced by individual characteristics, must be identified to assess the risk of developing EARR. Prolonged treatments should be avoided, and immunoassays to analyze proteins in gingival crevicular fluid (GCF) should be utilized for early diagnosis.