While nickel-titanium (NiTi) is the primary shape memory alloy (SMA) used in endodontic instruments, restorative dental components so far have not been fabricated from SMAs. The flexibility of these materials may solve problems implant prosthodontics resulting non-parallel positions and transfer inaccuracies. Based on a prototype novel attachment system for overdentures, finite element model wa...

A three-year-old, unspayed mongrel was presented to Small Animal Medicine unit, TVCC, River with a history of inability to open the mouth, not taking feed or water, drooling of saliva, and dullness for the past 5 days. Upon clinical observation and laboratory examination the condition was diagnosed as chronic Masticatory Muscle Myositis (MMM) and was treated with immunosuppressive doses ofcorti...

A number of studies have linked temporomandibular disorders (TMD) to altered activation patterns of the masticatory muscles during occlusion (Ciancaglini et al., 2002). Treatment of TMD aimed at restoring neuromuscular function requires knowledge of how occlusal contact is achieved in the healthy population. The purpose of this study was to identify common masticatory muscle function patterns i...

The crown is a steady prosthesis designed to restore the functionality of damaged tooth along, with its shape and size. They are also used reinforce that poses long-term risk due wide cavities accidental injuries. crowns fixed using dental cement made different materials such as porcelain cement, ceramics, etc. present work aims assess mechanical properties – stiffness strength, single molar pr...

In the present paper, a method to evaluate occlusal state and morphology that can integrate an optimal force field under clenching is proposed using simplex optimization principal component analysis (PCA). The objective function of taken as sum weighted forces reaction on temporomandibular joint (TMJ) maximize former minimize latter. optimized solutions in region defined by combination among th...

Basic patterns of masticatory rhythm are generated by the intrinsic neuronal network, so called masticatory central pattern generator, in the brain stem, and are fine tuned in response to both peripheral feedback and central afferent inputs. It is well known that peripheral receptors responsible for the regulation of masticatory rhythm are distributed in the periodontium, lips, oral mucosa, jaw...

The complexity of human oral functional movements has not been studied in detail quantitatively, and only recently have studies begun to evaluate whether such movements contain sex-specific characteristics. Therefore, the purposes of this study were: (1) to quantify in detail the jaw movements and associated masticatory electromyographic activity occurring during gum chewing, and (2) to explore...

PURPOSE In this study we tried to analyze the stress distribution in a symphyseal fractured human mandible reduced by 2 different methods--reduction with 1 miniplate or with 2 miniplates--by using finite element (FE) analysis, and then compared the results with an intact mandible. MATERIALS AND METHODS Three-dimensional FE models of an intact mandible and symphyseal fractured mandibles reduce...

The purpose of this study was to present the amount and distribution of pressure, stress, and deformation energy when basal implants in the mandible are restored with a bridge which is loaded at two different stages of bone healing. The model geometry and material properties of the mandible were gained from CT scans of a human mandible. The material model used in this study defined bone as an i...

Understanding how the skull transmits and dissipates forces during feeding provides insights into the selective pressures that may have driven the evolution of primate skull morphology. Traditionally, researchers have interpreted masticatory biomechanics in terms of simple global loading regimes applied to simple shapes (i.e., bending in sagittal and frontal planes, dorsoventral shear, and tors...