Biomechanical Assessment Ofthestress-Strain Status Ofsplinting Structures and Teeth Periodontium in Case of Chronic P

Abstract

The authors have proposed an all-cast pin splint, whose technological feature is the ceramic lining of the over-the-bar part, which acts as a covering aesthetic structure, provides better distribution of the functional load and binds firmly mobile teeth affected by chronic moderate localized periodontitis. The paper offers a view at the outcomes of a comparative analysis of the stress-strain state of periodontal tissues, teeth, and cortical bone in chronic moderate localized periodontitis at the anterior group of teeth in the lower jaw, when they are splinted with a specially designed splint and a conventional metal-ceramic monolithic splint by finite element modeling. The developed 3D mathematical model included, as the initial data, the features of the periodontium, of dental tissue and of cortical bone. There was an examination carried out focusing on the distribution of stresses, which occur when using the designed splint under the impact of multidirectional loads of 130 N, acting strictly down relative to the tooth longitudinal axis (vertically), and a load at an angle of 45°. The proposed method of splinting reduces the maximum stress in the periodontium at a vertical load by 26.9%, while at a side load of 45° it reduced the stress by 34.7%, if compared to a traditional monolithic metal-ceramic splint.

Specific Features of Variant Anatomy and Morphometric Characteristics of the Palatal Vault in Adults With Different Gnathic and Dental Types of Arches

“…Currently, there are plenty of methods available for studying the maxillofacial area, including the palatal arch [15,26,51,56]. Among the research methods, special attention is paid to such methods as X-ray cephalometry, cone-beam computed tomography, and electron microscopy [8,14,38].…”