Retention of Approximal Guiding Plane Surfaces in Removable Partial Skeletal Prosthesis

Abstract

BACKGROUND:The morphology of the retention tooth often does not correspond with the required design; hence there is often an indication for enamel recontouring or other restorative procedures.AIM:The study aimed to determine the impact of changing the path of insertion of the prosthesis by reshaping the anatomical and morphological structures of the natural teeth predetermined for the retention of the prosthesis.MATERIAL AND METHODS:The group of 40 patients with Class II, Subclass 1 according to Kennedy was formed, and 120 approximal surfaces of retention teeth were obtained. Two different types of prostheses were made on the models: one group in the zero point position of the model, and another group in the zero position of the model, with changing of the direction of input at an angle of 2°.RESULTS:The difference between the established and theoretical normal distribution of frequencies was tested with the Kolmogorov-Smirnov and Lilliefors tests (r < 0.10; r < 0.01). The first group showed a retention force of 0.08 N. In the second group the retention force was 0.94 N.CONCLUSION:It could be concluded that the change in the path of insertion of the dental prosthesis with conservative restorations as composite inlays, as well as the accurate extension of the prosthesis onto guiding plane surfaces, will undoubtedly increase the retention force of the prosthesis.

Molecular Cytogenomic Characterization of the Murine Breast Cancer Cell Lines C-127I, EMT6/P and TA3 Hauschka

“…Moreover, BC can also be grouped according to immunohistochemical markers (ICM), like (i) presence or absence of receptors like those for estrogen (ER), progesterone (PR), human epidermal growth factor receptor-2 (HER-2) or epidermal growth factor receptor (EGFR) on tumor cell surface; (ii) expression of nuclear protein Ki67 as a marker of cell proliferation; and (iii) cytokeratin 5 expression in the plasma of BC cells. These and maybe more ICMs, like TP53 or androgen receptor gene expression, lead to subgrouping of BC in luminal A and B, HER2 positive and negative, and triple-negative or basal like subtypes [ 8 , 9 , 10 ] ( Table 1 ).…”

“…BC subtyping is extremely important for metastasis staging and treatment [ 7 , 10 , 12 , 13 ]. In the majority of BC cases, surgical excision of primary tumor is the initial treatment step.…”

A study from a case report on the basic concept and design of removable partial dentures: Support and bracing considerations

“…Among the denture components, the minor connector and proximal plate provide frictional control [7,[29][30][31] by maintaining contact with the guiding plane on the axial surface of the abutment teeth, which in turn controls the movement direction and minimizes movement during denture functioning. Moreover, by restricting the direction of placement/removal (path of placement and removal) [6,7,12,29,32], the denture becomes less likely to be lifted and separated (Fig.…”