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Temporomandibular disorders are a generic term referred to clinical conditions involving the jaw muscles and temporomandibular joint with multifactorial pattern and genetic background. The aim of this observational study was to investigate the correlation between craniomandibular disorders and the presence of occlusal alterations. A clinical evaluation of the occlusal and articular status of the patients was carried out, integrating the latter with the electromyographic recording the activity of the masseter and temporalis muscles. A clinical observational study on 20 adults assessed temporomandibular disorders using DC/TMD criteria, anamnesis, clinical exams, occlusal and electromyographic analyses. Occlusion was evaluated morphologically and functionally. Electromyography tested static/dynamic muscle activity. Data were statistically analyzed using -tests and Pearson correlation ( < 0.05). Electromyographic analysis revealed significant differences between subjects with and without visual correction, suggesting that visual input influences masticatory muscle activity. Correlations emerged between occlusal asymmetries and neuromuscular parameters. These findings highlight clinical implications for mandibular function, muscle symmetry, and the potential for therapeutic rebalancing through targeted interventions. The study demonstrates a significant correlation between visual-motor integration and masticatory muscle efficiency. It emphasizes lateralized neuromuscular activation's influence on occlusal contact distribution. Moreover, it identifies mandibular torsion-endfeel inverse correlation as a potential diagnostic marker for craniomandibular dysfunctions via surface electromyography.
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http://dx.doi.org/10.3390/jcm14155508 | DOI Listing |
J Prosthodont
September 2025
Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
Purpose: This study aimed to evaluate the inherent and after cyclic loading fracture strength of implant-supported cantilevered fixed prostheses fabricated from recently introduced additively manufactured (AM) and subtractively manufactured (SM) materials, considering variations in prosthesis height.
Materials And Methods: Three cylinder-shaped master files (20 mm long and 11 mm wide) with varying heights (7, 11, and 15 mm) and a titanium-base (Ti-base) abutment space were designed. These designs were used to fabricate a total of 144 specimens with two AM resins indicated for definitive use (Crowntec; AM-CT and Flexcera Smile Ultra+; AM-FS), one high-impact polymer composite (breCAM.
J Prosthodont
September 2025
Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.
Purpose: This study aimed to compare the dimensional and positional deviations of additively manufactured removable dies fabricated using two bio-based resins and one conventional dental cast resin, while also evaluating these outcomes over a 4-week period.
Materials And Methods: A right mandibular first molar preparation on a typodont was scanned to digitally design removable dies and hollow partial arch casts. Based on a priori power analysis, a total of 30 dies (n = 10) and three hollow casts (n = 1) were fabricated using additive manufacturing (AM) from three different dental cast resins: DentaMODEL (DM), FotoDent bio-based model (CB), and soy-based resin (SB).
Clin Exp Dent Res
October 2025
Universal Scientific Education and Research Network (USERN), Tehran, Iran.
Objectives: Among the minimally invasive techniques for treating temporomandibular joint disorders (TMDs) is dry needling, which can be used as a potential treatment method. This study aims to review current knowledge to understand the impact of dry needling on treating TMDs.
Methods: This systematic review was carried out in alignment with the guidelines outlined in the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA).
J Esthet Restor Dent
September 2025
Department of Prosthodontics, Seoul National University School of Dentistry, Seoul, Republic of Korea.
Objective: To evaluate the impact of occlusion type and artificial intelligence-based computer-aided design (CAD) software on the geometric accuracy and clinical quality of auto-generated anterior and posterior crown designs.
Methods: Five typodont models representing various occlusion types (normal, Class I anterior diastema, Class II division 1, Class II division 2, and Class III anterior crossbite occlusion) underwent crown preparation for the maxillary right central incisor and first molar. Ten sets of intraoral scans were obtained from each prepared model, and crown designs were automatically generated using two software programs: deep learning-based (DL; Dentbird) and conventional automated (CA; Auto Workflow, 3Shape) (n = 10).
J Am Dent Assoc
September 2025
Background: In this narrative review, the authors aimed to provide a focused overview, grounded in scientific literature, of the most common primary and secondary headaches frequently observed in patients with orofacial pain as well as orofacial conditions that may mimic primary headache disorders. In addition, they highlighted the clinically significant overlap between headaches and temporomandibular disorders (TMDs).
Types Of Studies Reviewed: Information was sourced from the International Classification of Headache Disorders, Third Edition, for headache diagnoses and from the International Classification of Orofacial Pain for orofacial pain diagnoses.