Stress distribution in restored mandibular molars with external cervical resorption: a finite element analysis.

Odontology

Department of Endodontics, Faculty of Dentistry, Erciyes University, Turhan Baytop Street, No:1, Yenidoğan District, 38280, Talas, Kayseri, Turkey.

Published: December 2024

This study evaluates the stress distribution in mandibular molar teeth with external cervical resorption restored using various restorative and biomimetic materials through finite element analysis. A mandibular first molar was scanned to create a 3D model. 'Class 2Bp' external cervical resorption defects were simulated on the buccal aspect and restored with different materials. Composite resin or highly viscous glass ionomer cement restored the coronal portion, while mineral-trioxide-aggregate, Biodentine, BioAggregate, or glass-ionomer cement filled the radicular portion. Models representing unrestored external cervical resorption and intact teeth were also created. Access cavities were restored with composite resin in all models except the intact tooth model. This computational simulation study used finite element analysis (ANSYS) to assess stress distribution in mandibular molars with external cervical resorption. A 300 N oblique force, directed buccally at a 45° angle, was applied to simulate masticatory forces, and von Mises stresses were evaluated in the resorption regions to compare materials' performance in terms of stress concentration and tooth integrity. Similar stress distributions were observed when restoring the coronal portion with composite resin or highly-viscous glass ionomer cement. Stress decreased with mineral-trioxide-aggregate or glass-ionomer cement in the radicular portion compared to Biodentine and BioAggregate. Restored and intact tooth models experienced lower stresses than unrestored tooth. All tested models were considered safe, except the unrestored external cervical resorption model. Restored external cervical resorption models are generally safe; however, using mineral-trioxide-aggregate or glass-ionomer cement in the radicular portion may slightly reduce stress in external cervical resorption regions.

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10266-024-01029-6DOI Listing

Publication Analysis

Top Keywords

external cervical
32
cervical resorption
32
stress distribution
12
finite element
12
element analysis
12
composite resin
12
glass-ionomer cement
12
radicular portion
12
resorption
9
mandibular molars
8

Similar Publications

Can knowledge-based planning models validated on ethnically diverse patients lead to global standardisation of external beam radiation therapy for locally advanced cervix cancer?

Radiother Oncol

December 2024

Department of Radiation Oncology, Advanced Centre for Treatment, Research and Education in Cancer, Tata Memorial Centre, Homi Bhabha National Institute, Kharghar, Navi Mumbai, Maharashtra, India. Electronic address:

Background And Purpose: Knowledge-based planning (KBP) can consistently and efficiently create high-quality Volumetric Arc Therapy (VMAT) plans for cervix cancer. This study describes the cross-validation of two KBP models on geographically distinct populations and their comparison to manual plans from 67 centers. The purpose was to determine the universal applicability of a generic KBP model.

View Article and Find Full Text PDF

Objectives: Muscle loss after radiotherapy is associated with poorer survival in patients with oral cavity squamous cell carcinoma (OCSCC). However, the threshold of muscle loss remains unclear. This study aimed to utilize explainable artificial intelligence to identify the threshold of muscle loss associated with survival in OCSCC.

View Article and Find Full Text PDF

This study investigates the changing epidemiological profile of tongue squamous cell carcinoma (SCC) to young patients, highlighting its rising incidence among non-traditional risk groups. A retrospective descriptive study was conducted, covering data from medical records between 2000 and 2012. Patients were categorised into two age groups (≤ 40 years; 41-50 years).

View Article and Find Full Text PDF

Single Stage Reconstruction of Composite Rhinectomy Defects Using Osteocutaneous Radial Forearm Free Flap.

Head Neck

December 2024

Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear, Harvard Medical School, Boston, Massachusetts, USA.

Background: Composite rhinectomy defects pose significant challenges due to the nose's complex structure and role in facial esthetics and function. Traditional nasal reconstructions often require multiple stages to restore mucosal lining, structural support, and external skin.

Methods: This case series examines the use of a single-stage osteocutaneous radial forearm free flap (OCRFFF) for composite rhinectomy reconstruction.

View Article and Find Full Text PDF

The adenosinergic pathway converting endogenous ATP to adenosine (ADO) is a major immunosuppressive pathway in cancer. Emerging data indicate that plasma small extracellular vesicles (sEV) express CD39 and CD73 and produce ADO. Using a noninvasive, highly sensitive newly developed assay, metabolism of N-etheno-labeled eATP, eADP or eAMP by ecto-nucleotidases on the external surface of sEV was measured using high pressure liquid chromatography with fluorescence detection.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!