The biomechanical relationship between incisor and condylar guidances in deep bite and normal cases

Darendeliler, N
Dincer, M
Soylu, Reşit
The purpose of this study was to investigate the biomechanical relationship between the condylar and anterior guidances in deep bite malocclusion and control groups. The subjects consisted of 18 deep bite patients and 14 normal occlusions. A four-bar mechanism was described on the lateral cephalogram films and a computer program, for which the lengths of the links measured on the films were the inputs, was developed. The computer program was used to calculate the angles of rotation of the mandible and the condyle during contact of the mandibular anterior teeth with the lingual surface of the maxillary anterior teeth as the mandible moves forward. Comparison of the mean values of the angles of rotation of the mandible and condyle in the two groups has shown that the change in the angle of rotation of the condyle is statistically significant (P < 0.05). The angles of rotation of condyle in deep bite group were found larger than the angles of normal group. Correlation between the angles of rotation of the condyle and mandible has shown that they were significantly related. The cause of temporomandibular disorders may be attributed to the large angle of rotation of the condyle in deep incisal overbite.


Cytotoxic effects of four different endodontic materials in human periodontal ligament fibroblasts
GÖRDUYSUS, MELAHAT; AVCU, NİHAL; Gorduysus, Omer; Pekel, Aysel; Baran, Yusuf; Avcu, Ferit; Ural, Ali Ugur (Elsevier BV, 2007-12-01)
The purpose of this study was to compare the cytotoxicity, induced apoptosis and/or necrosis, and apoptotic mechanisms in human periodontal ligament (PDL) fibroblasts treated with four different endodontic materials: White ProRoot mineral trioxide aggregate (MTA) (MTA/Dentsply; Tulsa Dental, Memphis, TN), Diaket (ESPE, Seefeld, Germany), Endion (VOCO, Cuxhaven, Germany), and CYMED 8410 (NANO, Kaohsiung, Taiwan). The effects of these four materials on the viability of PDL fibroblasts were determined by MTT (...
In vitro Comparison of Autoclave Polymerization on the Transverse Strength of Denture Base Resins
Durkan, Rukiye; ÖZEL, MEHMET BİROL; Bagis, Bora; Usanmaz, Ali (Japanese Society for Dental Materials and Devices, 2008-07-01)
The aim of this study was to determine the effect of autoclave polymerization on the transverse strength of denture base polymers. To this end, 30 rectangular test specimens were fabricated of two heat-polymerized denture base polymers. The test groups were: (I) control. i.e.. conventional water bath to polymerize result by heat at 100 degrees C for 30 minutes; (II) autoclave polymerization at 60 degrees C for 30 minutes followed by 130 degrees C for 10 minutes; and (III) autoclave polymerization at 60 degr...
The effect of Esthetic fibers on impact resistance of a conventional heat-cured denture base resin
Dogan, Orhan Murat; Bolayir, Giray; Keskin, Selda; Dogan, Arife; Bek, Bulent; Boztug, Ali (Japanese Society for Dental Materials and Devices, 2007-03-01)
This study was conducted to observe the changes in impact resistance of a denture base resin reinforced with five types of fiber. E-glass, polyester, rayon, nylon 6, and nylon 6/6 fibers were cut into 2, 4, and 6 mm lengths and added into the resin at a concentration of 3% by weight. Five test specimens for each formulation, as well as control specimens without fiber, were prepared using a mold including a V-shaped notch with 55 x 10 x 10 mm dimensions. Impact tests were carried out using a Charpy-type test...
YAMAN, SD; ALACAM, T; Yaman, Yavuz (Elsevier BV, 1995-06-01)
In this study, the stress distribution in a maxillary central incisor subjected to an endodontic treatment was determined by using a three-dimensional finite-element method, The tooth had a variable root canal cross-sectional area, and the canal was assumed to be filled with vertical condensation. The Clinical practice was simulated by considering the obturation in successive stages, The main aim of the study was to investigate the possibility of fracture due to the obturation process, It was found that, wi...
The effect of acquired salivary pellicle on the surface free energy and wettability of different denture base materials
Sipahi, C; Anil, N; Bayramlı, Erdal (Elsevier BV, 2001-03-01)
Objective: The objective of the present study was to evaluate the effect of salivary coating on the wettability and surface free energy of different denture base materials.
Citation Formats
N. Darendeliler, M. Dincer, and R. Soylu, “The biomechanical relationship between incisor and condylar guidances in deep bite and normal cases,” JOURNAL OF ORAL REHABILITATION, pp. 430–437, 2004, Accessed: 00, 2020. [Online]. Available: