The drum spring (DS) retractor: A constant and continuous force for canine retraction

Darendeliler, MA
Darendeliler, Haluk
Uner, O
Although much research has been undertaken on the rate of tooth movement, with different hypotheses having been put forward, the concepts of threshold, light, heavy and optimal forces are not still clear.


Biomechanical effects of rapid maxillary expansion on the craniofacial skeleton, studied by the finite element method
Iseri, H; Tekkaya, AE; Oztan, O; Bilgic, S (Oxford University Press (OUP), 1998-08-01)
The aim of this study was to evaluate the biomechanical effect of rapid maxillary expansion (RME) on the craniofacial complex by using a three-dimensional finite element model (FEM) of the craniofacial skeleton. The construction of the three-dimensional FEM was based on computer tomography (CT) scans of the skull of a 12-year-old male subject. The CT pictures were digitized and converted to the finite element model by means of a procedure developed for the present study. The final mesh consisted of 2270 thi...
The effects of positive core self and external evaluations on performance appraisals
Güven, Lale; Sümer, Canan H; Department of Industrial and Organizational Psychology (2007)
The purpose of this study was to investigate the effects of core self-evaluations (CSEs) and core external-evaluations (CEEs) on performance evaluations. It was hypothesized that people with higher levels of CSEs and CEEs would be more lenient in their performance ratings, when rating neutral performance. The second hypothesis of the study was that people with higher and lower CSEs would engage more in halo when rating neutral performance compared to people with average levels of CSEs. It was further hypoth...
An assessment of the status of the multiple realizability thesis in cognitive science
Baysan, Emin Umut; Temürcü, Ceyhan; Department of Cognitive Sciences (2011)
It has been argued that there are physically different ways of instantiating mental properties, the nature of which is the subject matter of cognitive science. This claim has been known as the Multiple Realizability Thesis (MRT). It has been suggested that the MRT shows that a reduction of mental properties to physical properties is impossible, as there cannot be one-to-one correspondences of mental properties to the properties of the brain. Moreover, it has been argued that the latter point shows that phys...
Micromechanical modeling of semicrystalline polymers with spherulite morphology
Oktay, Hasan Emre; Göktepe, Serdar; Gürses, Ercan; Department of Civil Engineering (2020-10-23)
In this study, a micromechanical constitutive model for semicrystalline polymers is developed. The proposed model considers interactions among the adjacent regions at the same length scale. The neighborhood information is obtained from the well characterized spherulite morphology of polyethylene. Deformation characteristics of a disk-like spherulite model that has similarities with the considered modeling approach are studied using the finite element method. The model discretizes a disklike spherulite i...
The effect of hip rotation on bone mineral density of the proximal femur measured by dual energy X-ray absorptiometry
Celik, Oezguer; Salci, Yasar; MANİSALI, METİN; Korkusuz, Feza (2009-01-01)
Objectives: The aim of this study was to compare the effect of lower extremity position changes on hip bone mineral density measured by dual energy X-ray absorptiometry.
Citation Formats
M. Darendeliler, H. Darendeliler, and O. Uner, “The drum spring (DS) retractor: A constant and continuous force for canine retraction,” EUROPEAN JOURNAL OF ORTHODONTICS, pp. 115–130, 1997, Accessed: 00, 2020. [Online]. Available: