Publications by authors named "Showfety K"
The orientation of the sella-nasion line to true vertical in natural head posture is found to be correlated with some measures that describe internal craniofacial morphology.
View Article and Find Full Text PDFRepeated measures analysis of geometrically constructed and directly determined cephalometric points.
Am J Orthod Dentofacial Orthop
April 1987
Article Synopsis
- The study examined how accurately orthodontists can identify specific bony landmarks on lateral cephalometric radiographs by comparing visually determined landmarks to geometrically constructed ones.
- Three groups of orthodontists with varying levels of experience evaluated 18 landmarks across multiple radiographs, and their consistency in identifying these landmarks was tested over four sessions.
- Results showed that the variability in landmark identification was not significantly affected by the observer's experience or radiograph quality, and both identification methods (visual and geometric) yielded similar reliability, supporting the use of geometric construction techniques in cephalometric analysis.
Postorthodontic, presurgical, occlusal equilibration for orthognathic surgery cases.
Int J Adult Orthodon Orthognath Surg
July 1987
Erupted and impacted teeth from young (12 to 24 years of age) and older persons (over 50 years of age) were bonded by a standard technique using etching times of 0, 15, 30, and 60 seconds. Two subgroups of teeth were soaked for 7 days and compared with those in the remainder of the group. Test specimens were loaded in shear to bond failure by means of a testing machine with a 200- kg load cell and a crosshead speed of 5 mm/minute.
View Article and Find Full Text PDFPosttreatment evaluation of temporomandibular joint dysfunction after orthodontics and maxillary surgical impaction.
Int J Adult Orthodon Orthognath Surg
October 1986
Standing natural head position is a reproducible, physiologically determined aspect of function. Recent studies have demonstrated associations between this aspect of function and the form of the skeletodental features, in both growing and nongrowing persons. A simple method has been devised which obviates the need for multiple radiographs to determine the clinical reliability of the method.
View Article and Find Full Text PDFRelationships have been established between head posture and craniofacial morphology in both adults and children. The determinants of head posture are not yet understood. Does posture dictate form, or vice versa? This pilot study investigates the short-term effect of artificial forward relocation of the center of the mass of the head on postural adaptation in the sagittal plane.
View Article and Find Full Text PDFVariations in natural head position have been noted by previous workers to be associated with both dentoalveolar and craniofacial skeletal morphologic features. The determinants of cranial posture are as yet not known. Three experiments are described, dealing with the influence of (1) total nasal obstruction, (2) visual feedback deprivation, and (3) a combination of (1) and (2) on the posture of the cranium measured relative to a gravity-defined true vertical reference plane.
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