George Dumitru Constantin

Dr. George Dumitru Constantin

orcid

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
Verified
Journal Article
Open access
PDF file
MRMirabela Romanescu
Mirabela Romanescu
COCamelia Oprean
Camelia Oprean
ALAdelina Lombrea
Adelina Lombrea
BBBianca Badescu
Bianca Badescu
ATAna Teodor
Ana Teodor
Valentina Oana budaValentina Oana buda
Valentina Oana buda
Combating antimicrobial resistance (AMR) is among the 10 global health issues identified by the World Health Organization (WHO) in 2021. While AMR is a naturally occurring process, the inappropriate use of antibiotics in different settings and legislative gaps has led to its rapid progression. As a result, AMR has grown into a serious global menace that impacts not only humans but also animals and, ultimately, the entire environment. Thus, effective prophylactic measures, as well as more potent and non-toxic antimicrobial agents, are pressingly needed. The antimicrobial activity of essential oils (EOs) is supported by consistent research in the field. Although EOs have been used for centuries, they are newcomers when it comes to managing infections in clinical settings; it is mainly because methodological settings are largely non-overlapping and there are insufficient data regarding EOs’ in vivo activity and toxicity. This review considers the concept of AMR and its main determinants, the modality by which the issue has been globally addressed and the potential of EOs as alternative or auxiliary therapy. The focus is shifted towards the pathogenesis, mechanism of resistance and activity of several EOs against the six high priority pathogens listed by WHO in 2017, for which new therapeutic solutions are pressingly required.

Verified
Journal Article
Open access
PDF file
RLRuxandra Elena Luca
Ruxandra Elena Luca
Alessandra GiulianiAlessandra Giuliani
Alessandra Giuliani
AMAdrian Mănescu
Adrian Mănescu
RHRodica Heredea
Rodica Heredea
BHBogdan Hoinoiu
Bogdan Hoinoiu
Darinca Carmen Marilena TodeaDarinca Carmen Marilena Todea
Darinca Carmen Marilena Todea
Background: Alveolar bone defects are usually the main concern when planning implant treatments for the appropriate oral rehabilitation of patients. To improve local conditions and achieve implant treatments, there are several methods used for increasing bone volume, among which one of the most successful, versatile, and effective is considered to be guided bone regeneration. The aim of this demonstrative study was to propose an innovative analysis protocol for the evaluation of the effect of photobiomodulation on the bone regeneration process, using rat calvarial defects of 5 mm in diameter, filled with xenograft, covered with collagen membrane, and then exposed to laser radiation. Methods: The animals were sacrificed at different points in time (i.e., after 14, 21, and 30 days). Samples of identical dimensions were harvested in order to compare the results obtained after different periods of healing. The analysis was performed by cross-linking the information obtained using histology and high-resolution synchrotron-based tomography on the same samples. A comparison was made with both the negative control (NC) group (with a bone defect which was left for spontaneous healing), and the positive control (PC) group (in which the bone defects were filled with xenografts and collagen membrane without receiving laser treatment). Results: We demonstrated that using photobiomodulation provides a better healing effect than when receiving only the support of the biomaterial. This effect has been evident for short times treatments, i.e., during the first 14 days after surgery. Conclusion: The proposed analysis protocol was effective in detecting the presence of higher quantities of bone volumes under remodeling after photobiomodulation with respect to the exclusive bone regeneration guided by the xenograft.

GCGeorge Dumitru Constantin
George Dumitru Constantin
Crisanta-Alina MazilescuCrisanta-Alina Mazilescu
Crisanta-Alina Mazilescu
THTeodora Hoinoiu
Teodora Hoinoiu
BHBogdan Hoinoiu
Bogdan Hoinoiu
RLRuxandra Elena Luca
Ruxandra Elena Luca
Roxana OanceaRoxana Oancea
Roxana Oancea
This study investigated the attitude of Romanian medical students and doctors toward business ethics by measuring the preference for a particular ethical philosophy, namely, the preference for Machiavellianism, moral objectivism, social Darwinism, ethical relativism, and legalism. At the same time, this study aimed to explore the influence of sex, age, and ethics education on the attitude toward business ethics. The data collection was performed using a voluntary self-administered online survey including the Attitudes Toward Business Ethics Questionnaire (ATBEQ) instrument. Our findings show that the values based on which Romanian medical students and doctors make business decisions belong predominantly to the moral objectivism philosophy, which is grounded on rational actions based on a set of objective moral standards.

19 November 2025 in Healthcare
Verified
Journal Article
Open access
PDF file
IOANA LILEIOANA LILE
IOANA LILE
STSerban Talpos
Serban Talpos
Diana MarianDiana Marian
Diana Marian
OSOtilia Lavinia Stana
Otilia Lavinia Stana
ASAndra-Alexandra Stăncioiu
Andra-Alexandra Stăncioiu
GCGeorge Dumitru Constantin
George Dumitru Constantin
Background/Objectives: Young adults increasingly prefer natural dentifrices; however, the short-term clinical effects and behavioural correlates of these products remain insufficiently documented. This study aimed to evaluate the associations between daily oral-hygiene practices, adjunctive cleaning methods, and plaque and gingival indices, and to compare the short-term effects of three natural toothpaste formulations—sodium bicarbonate, activated charcoal, and lemon-based. Methods: In this cross-sectional study, 101 Romanian adults (aged 20–41 years; 69.3% urban) completed a structured questionnaire assessing brushing frequency and the use of dental floss, interdental stimulators, and mouth rinses. Clinical assessments included the Silness–Löe Plaque Index and the Löe–Silness Gingival Index (modified by Lobene), recorded immediately before and after a supervised 2 min brushing session using the Bass technique with soft-bristled brushes and the participant’s self-reported natural toothpaste (baking soda: n = 42; charcoal: n = 27; lemon: n = 32). Results: Before brushing, 78.2% of participants presented with thin adherent plaque, while the gingival status was normal in 72.3%, mildly inflamed in 22.8%, and moderately inflamed in 5.0%. After brushing, the proportion with normal gingiva increased to 77.2%, and the proportion of thin, adherent plaque decreased to 22.8%. Brushing frequency was positively correlated with plaque reduction (ρ = 0.42, p < 0.001), while the use of adjunctive cleaning methods was inversely correlated with post-brushing gingival inflammation (ρ = −0.36, p = 0.002). Gingival improvement differed significantly among toothpaste types (χ2, p < 0.001), with formulations containing baking soda and lemon showing slightly more favourable short-term gingival categories than charcoal; these patterns are descriptive and do not demonstrate comparative product efficacy. Urban–rural differences were observed for brushing frequency (p < 0.001) and periodontal status with fewer lesions among urban participants (p = 0.002). Conclusions: A single supervised Bass-technique brushing session resulted in measurable short-term improvements in plaque and gingival indices among young adults. Sodium bicarbonate and lemon-based dentifrices appeared to be associated with slightly more favourable short-term gingival responses than charcoal, although these findings should be interpreted as preliminary. These findings emphasise the importance of consistent brushing and interdental cleaning behaviours and highlight the need for longitudinal randomised trials to evaluate the durability, safety, and comparative effectiveness of natural versus conventional dentifrices. Given the cross-sectional, single-session design, these findings are exploratory and do not establish causal or comparative product efficacy.

8 August 2025 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
IOANA LILEIOANA LILE
IOANA LILE
Tareq HajajTareq Hajaj
Tareq Hajaj
GCGeorge Dumitru Constantin
George Dumitru Constantin
STSerban Talpos
Serban Talpos
Diana MarianDiana Marian
Diana Marian
Ioana VejaIoana Veja
Ioana Veja
Background: Bruxism is a common parafunctional activity involving repetitive jaw muscle movements during wakefulness (awake bruxism) or sleep (sleep bruxism). While its multifactorial etiology is widely accepted, the roles of occlusal interferences, temporomandibular joint (TMJ) dysfunction, stress, and sleep-related breathing disturbances remain under investigation. Objectives: This cross-sectional study evaluated associations between bruxism and occlusal discrepancies, TMJ symptoms, stress, and sleep-related variables (snoring and obstructive sleep apnea, OSA) in Romanian adults. Methods: Ninety-eight adults (mean age: 30.4 ± 8.9 years) completed a structured questionnaire reviewed for content validity and pilot-tested for clarity but not formally validated. Participants were categorized into bruxism (n = 51) and control (n = 47) groups. Variables assessed included bruxism type, TMJ symptoms, occlusal interferences, stress, snoring, OSA, and parafunctional habits. Bivariate and multivariate logistic regression analyses were conducted. Results: Sleep bruxism was predominant (88%), with 59% classified as sleep-only bruxers. Occlusal discrepancies (46% vs. 14%, p < 0.001), TMJ symptoms (joint pain: 38% vs. 8%; fatigue: 44% vs. 10%), and habitual snoring (60% vs. 22%, p < 0.001) were significantly more common among bruxers. No significant difference was observed in OSA prevalence. Independent predictors of bruxism included occlusal interferences (adjusted OR = 4.7, p = 0.009), TMJ symptoms (adjusted OR = 6.5, p = 0.002), and habitual snoring (adjusted OR = 4.1, p = 0.016). Conclusions: Bruxism was significantly associated with occlusal interferences, TMJ dysfunction, and habitual snoring, supporting the need for multifactorial assessment and integrated clinical management. Limitations: This study relied on self-reported bruxism classification and a non-validated questionnaire instrument, which may limit generalizability and diagnostic accuracy.

4 October 2025 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
Tareq HajajTareq Hajaj
Tareq Hajaj
Mihai RominuMihai Rominu
Mihai Rominu
GCGeorge Dumitru Constantin
George Dumitru Constantin
MDMaria Dobos
Maria Dobos
Ioana VejaIoana Veja
Ioana Veja
Background: Tooth preparation design strongly influences the long-term success of fixed prosthodontic restorations, affecting periodontal stability and esthetic outcomes. Conventional horizontal designs such as chamfer and shoulder remain widely used but present biological and technical limitations. The Biologically Oriented Preparation Technique (BOPT), a vertical approach, has been proposed as an alternative. Methods: This narrative review synthesizes evidence from clinical trials, histological investigations, and systematic reviews, comparing horizontal preparations with BOPT with emphasis on periodontal parameters and the role of digital workflows. Results: Horizontal designs provide predictable outcomes but may predispose to inflammation and marginal instability, especially with subgingival margins. BOPT has been associated with greater gingival thickness, stable probing depths, and favorable esthetic results, with prospective studies reporting stability for up to 10 years. Integration with CAD/CAM workflows appears to enhance precision and reproducibility. Conclusions: BOPT shows promising periodontal and esthetic benefits, particularly in thin gingival biotypes and esthetically demanding cases. However, current evidence is limited, and the available studies do not allow firm conclusions about superiority over conventional designs. Further randomized controlled trials with large cohorts and long-term follow-up are required before definitive clinical recommendations can be made.