Saudi Dental Journal最新文献

Minimising pain with effective local anaesthesia is an essential step towards improving the level of dentally anxious patients’ comfort during dental treatment. It can be provided by many different techniques. One of them is using the Computer-Controlled Local Anaesthesia Delivery systems (CCLADs). This study was conducted to compare the efficacy of computerised anaesthesia with the conventional technique in terms of perceived pain. A database literature search was performed on PubMed, Cochrane Library and Google Scholar, covering up the period between 2015 and 2023. Only the studies comparing computerised anaesthesia technique with the use of conventional carpule were included. An overview of 20 relevant studies (n = 1347 subjects) was provided including pediatric patients, as well as the adults. The evaluated parameters were: pain, child’s behaviour, heart rate, blood pressure, level of satisfaction, anxiety, further anaesthesia method preference, need for additional anaesthetic, as well as the duration of anaesthesia, measured by different scales, devices and questionnaires. The present literature review led the authors to the conclusion, that the use of CCLADs is significantly less painful than the traditional anaesthesia and it is a promising technique for helping patients deal with pain perception. However, it is advisable to conduct further research on the use of CCLAD.

Introduction

The effects of hydroxyapatite (HA) on oral bacteria and biofilm remains inconclusive, with conflicting results. Studies assessing its effect against caries-causing bacteria are limited.

Objective

This study aimed to explore the antibacterial activity of HA synthesized using microwave against two of the most common cariogenic bacteria, Streptococcus mutans (S. mutans) and Streptococcus sobrinus (S. sobrinus).

Methods

HA was chemically synthesized using a microwave. To verify the existence of the crystalline phase and the calcium and phosphate content, X-ray diffraction (XRD) and energy-dispersive X-ray (EDX) analysis were employed, respectively. Reduction in bacterial growth was used to assess the antibacterial effects of 10 %, 20 %, and 30 % HA against the tested bacteria.

Results

The presence of the hydroxyapatite crystallite phase was verified using XRD, while EDX revealed the Calcium to Phosphorus (Ca/P) ratio to be 1.6. In response to the 10 %, 20 %, and 30 % HA, S. mutans were reduced by 14.5 %, 15.6 %, and 23.4 %, whereas S. sobrinus decreased by 17.1 %, 60.8 %, and 98.6 %, respectively.

Conclusion

Microwave-synthesized HA could have antibacterial properties against caries-causing bacteria with different potencies depending on concentration and bacteria.

Background

The prevalence of molar incisor hypomineralisation (MIH) varies worldwide. In Saudi Arabia, data about this condition is limited to a few cities.

Aim

To evaluate the prevalence, severity and associated aetiological factors of MIH in children seeking dental care in Armed Forces Hospital, Jazan, Saudi Arabia.

Methodology

Participants were recruited by convenience sampling according to eligibility criteria. Diagnostic criteria used were according to the molar incisor hypomineralisation severity scoring system (MIH-SSS). Demographic data and past medical history were recorded using a carefully organised questionnaire, and MIH causal factors were evaluated.

Results

A total of 1405 children participated in the study. Among the permanent first molars, mandibular teeth were more frequently affected by MIH than maxillary teeth. In the permanent central incisors group, maxillary teeth were more frequently involved than mandibular teeth, whereas lateral incisor was the least affected among the tooth types in all four quadrants. MIH had more frequently involved all four molars (66.1%), and two associated central incisors were found (31.3%). MIH in the incisors had mild to moderate severity, whereas molars presented with severe defects. Among prenatal factors, maternal anaemia and vitamin D deficiency, out-of-perinatal factors, caesarean delivery, low birth weight and perinatal jaundice, and early childhood tonsillitis and early childhood anaemia were the significant associated factors for MIH development.

Conclusion

The prevalence of MIH was 8%, and maxillary incisors and mandibular first molars were frequently affected. Children with MIH showed prenatal, perinatal and postnatal aetiological factors involved in the development of MIH.

Objectives

This study investigates the impact of injected fish-scale-derived hydroxyapatite nanoparticles (FsHA-NPs) on orthodontic tooth movement (OTM) and the width of the periodontal ligament (PDL) space.

Materials and Methods

Twenty-six Wistar rats underwent mesial orthodontic traction with a force of 50 g for 21 days. Following the application of the orthodontic appliance, the rats were randomly divided into two groups: a control group, which received a 0.3 µg saline injection, and the experimental FsHA group, which received 100 mg/0.3 ml of FsHA-NPs after thorough characterisation. Injections were administered immediately after appliance application and repeated at 7 and 14 days. Statistical analysis was conducted with a significance level of P ≤ 0.05.

Result

The experimental group exhibited a significant reduction in OTM at 7-, 14-, and 21-day post-force application. Additionally, a reduction in PDL width was observed in the mesiocervical and disto-apical regions of the mesial and distal roots of the first molar.

Conclusion

FsHA-NPs derived from biowaste fish scales exhibit promising potential as biomaterials for enhancing control over OTM. This study underscores the viability, accessibility, and safety of FsHA-NPs as a locally injectable material for orthodontic applications.

Introduction

Excessive gingival display (EGD) is a mucogingival deformity characterized by overexposure of the maxillary gingiva while smiling. This cross-sectional study aimed to identify EGD etiologies and their prevalence in participants at King Saud University, Saudi Arabia.

Methods

Adults with a gummy smile, who resided in Saudi Arabia, were nonsmokers, had good overall health, and had all their maxillary anterior teeth were eligible for inclusion. Participants were first screened by phone, and those who met the eligibility criteria were further screened at the Dental University Hospital (King Saud University, Riyadh, Saudi Arabia). The demographic characteristics of all eligible participants were recorded. Participants were further subjected to extraoral examination, which included gingival display (GD), vertical maxillary excess (VME), hypermobile upper lip (HUL), smile line, altered passive eruption (APE), gingival overgrowth, and short upper lip (SUL). Intraoral examination included periodontal pocket depth and bleeding upon probing. Student’s t-test was used to compare the mean GD values across the main etiologies (VME, HUL, APE, and SUL).

Results

All 123 participants (mean age: 23.1 ± 0.2 years; 74 females) had EGD (i.e., GD ≥ 4 mm), of whom 55 (44.7 %) had a single etiology, and the remaining 68 (55.3 %) had > 1 etiology. APE was the predominant etiology (n = 90, 73.2 %) in the study population. Of these (n = 90), APE alone was prevalent in 29 (32.2 %) participants, whereas the remaining patients had APE in combination with other EGD etiologies (n = 61; 67.8 %). The presence of more than one EGD etiology in the same participant was associated with greater GD. The VME and HUL were significantly associated with smile line classes (p < 0.05).

Conclusions

APE (alone or in combination) was the predominant etiology of EGD in the study population. The presence of multiple EGD etiologies in the same patient emphasizes the need for an etiology-based, sequential, and multiple-treatment strategy to effectively manage EGD.

Purpose

Sodium hypochlorite (NaOCl) is commonly used to irrigate primary teeth during pulpectomy. Although high concentrations of NaOCl are effective, they pose a risk of toxic damage to periapical tissues if NaOCl penetrates through the apical foramen. Therefore, low concentrations of NaOCl are preferred to mitigate this risk. However, concerns persist regarding the antibacterial efficacy of low concentrations of NaOCl compared to high concentrations. The objective of this study was to assess and compare the efficacy of 1% and 3% NaOCl irrigation in reducing bacterial load within primary teeth root canals.

Materials and methods

This clinical study involved forty participants divided into two groups. Group 1 (n = 20) received canal irrigation with 1 % NaOCl solution, while Group 2 (n = 20) received canal irrigation with 3 % NaOCl solution. Microbial samples were collected from the root canal using a paper point before and after irrigation. The samples were aseptically transferred to ultra-snap tubes and then analyzed using a Bioluminometer. The results were recorded.

Results

Both groups exhibited a decrease in bacterial count after irrigation. The mean colony count post irrigation for 3 % NaOCl was 258.05 ± 28.61, and for 1 % NaOCl it was 267.60 ± 30.56. However, no statistically significant difference was observed upon intergroup comparison.

Conclusion

This study shows that 1% NaOCl is equally effective as 3% NaOCl in reducing bacterial count in root canals. Thus, using 1% NaOCl as an irrigant is appropriate in clinical practice.

Background

Angulated screw channel (ASC) abutment allows off-axis dental implants to be used in dental restorations without the need for cementation. As this is a relatively new system, research on its clinical performance is limited.

Objectives

To summarize the available in-vitro and in-vivo studies on the mechanical and technical issues associated with the ASC system and compare its clinical performance with that of conventional implant-supported abutments.

Methods

A comprehensive literature search in PubMed, Web of Science, and ScienceDirect databases was performed, focusing on articles about angulated (angled) screw channel (ASC) systems published in English between January 2015 and November 2023. Only in-vitro and in-vivo studies were included.

Results

After analyzing the recorded articles, 26 studies (11 in vivo and 15 in vitro) were included in the final discussion and review.

Conclusion

Although the ASC system is still relatively new, and is presently outperformed by conventional abutment systems in terms of technical and mechanical properties, in short- and medium-term in-vivo studies, it was shown reliable for retaining single or multiple-unit implant restorations in both posterior and anterior zones. Still, further long-term clinical research is needed to fully elucidate the risk factors associated with ASC failures.

Objective

This systematic review was aimed to assess the prevalence of apical periodontitis (AP) in Saudi Arabia, focusing on individual-level prevalence and the frequency of AP in endodontically versus untreated teeth.

Methods

This review followed the PRISMA guidelines and involved searches in several databases, including PubMed-MEDLINE, Cochrane-CENTRAL, and EMBASE, without date restrictions until August 19th, 2023. Eligibility criteria encompassed studies using CBCT, panoramic, and periapical radiographs to diagnose AP in the Saudi population. The meta-analysis employed a random-effects model due to high heterogeneity among studies.

Results

From 359 records, 13 studies were included, indicating a 40% prevalence of AP in individuals and a 6% prevalence across all teeth within the Saudi population. Root canal-treated teeth demonstrated a higher prevalence at 47%. The data revealed a substantial prevalence of AP compared to global averages, with first molars being the most affected. Studies showed moderate risk of bias and significant heterogeneity.

Conclusion

The high occurrence of AP in Saudi Arabia, particularly in root-treated teeth, emphasizes the need for enhanced endodontic care and more accurate diagnostics. Urgent improvements in dental health policies and further research are essential to understand AP’s impact and improve oral health outcomes.

Background and Objective

Various materials like MTA, Biodentine etc have been used for the regeneration of lost dental tissues. Still, the quest for newer materials to enhance the bioactivity of the existing materials continues. Hence this study aims at the evaluation of bioactivity of MTA Plus when conjugated with Chitosan in phosphate buffer saline.

Methodology

Materials used were MTA Plus (Group 1), MTA Plus and chitosan conjugate(Group 2). The materials were mixed and placed in phosphate buffer saline. Bioactivity of Group 1 and Group 2 materials were assessed at 7 days and 28 day’s time intervals using SEM-EDX analysis.

Results

SEM analysis of group 1 revealed a compact and agglomerate lath-like appearance with uniform particle size. SEM analysis of group 2 reveals acicular and lath-like appearance of the precipitate on the material surface. EDX analysis of the freshly prepared materials gave the qualitative semiquantitative elemental composition on the material surfaces after immersion in PBS for 7 and 28 days.

Conclusion

MTA Plus Chitosan conjugate had greater potential to form apatite crystals on its surface. Hence, Chitosan can be used as a vehicle for the currently available materials to enhance the bioactivity and fasten the healing process.