To develop the Croatian version of the 41-item Dental Environment Stress questionnaire (DES) for stress assessment of dental students in both, preclinical and clinical years of study and to test its ...psychometric properties in Croatian dental student population.
The English version of the 41-Item DES questionnaire was first translated into the Croatian language. Subsequently, it was set on the google drive and filled out by a total of 202 students from the School of Dental Medicine, University of Zagreb and 30 additional students from other Faculties. Students also assessed their overall level of stress on the Likert scale (1=no stress, 5=highest level of stress). Internal consistency was tested on 202 dental students; test-retest reliability on 30 dental students who filled out the same questionnaire twice; convergent validity on 202 dental students; and divergent validity on 202 dental students and 30 students from faculties not belonging to the biomedicine group.
Internal consistency showed high Cronbach alpha coefficient (0.9) and test-retest reliability showed no significant difference (P>0.05) within the period of 14 days when stress level had not changed (vacation). Convergent validity was confirmed by the significant association between the DES summary scores and the self- perceived level of stress (Spearman's rho=0.881;
<0.001). Divergent validity was confirmed by significantly lower DES summary scores in students not belonging to the Biomedicine group (t=7.5, P<0.001).
Excellent psychometric properties of the Croatian version of the DES questionnaire enable its utilization for assessment of stress level in Croatian dental students.
Svrha: Razviti hrvatsku verziju Dental Environment Stress upitnika (DES) s 41 pitanjem za mjerenje razine stresa kod studenata dentalne medicine pretkliničkih i kliničkih godina studija te ispitati ...psihometrijska
svojstva upitnika u hrvatskoj kulturološkoj sredini. Ispitanici i postupci: Engleska verzija DES upitnika s 41 pitanjem prvo je prevedena na hrvatski jezik i postavljena na Google drive. Ispunili su je 202 studenta Stomatološkog fakulteta Sveučiliša u Zagrebu i 30 studenata drugih fakulteta Sveučilišta u Zagrebu kako bi se ispitala psihometrijska svojstva upitnika. Studenti su procijenili ukupnu količinu stresa na Likertovoj ljestvici (0 = nema stresa, 3 = najveći mogući stres). Unutarnja konzistentnost testirana je na 202 studenta dentalne medicine; test-retest analiza na 30 studenata koji su ispunili isti upitnik dvaput; konvergentna valjanost na 202 studenta dentalne medicine te divergentna valjanost na 202 studenta dentalne medicine i 30 studenata drugih fakulteta koji nisu iz područja biomedicine. Rezultati: Unutarnja konzistencija pokazala je visok Cronbach alpha koeficijent (0,9), a test-retest pouzdanost pokazala je da ne postoji statistički značajna razlika u zbroju bodova upitnika (p > 0,05) unutar razdoblja od 14 dana kada se razina stresa nije značajno mijenjala (vrijeme praznika). Konvergentna valjanost potvrđena je značajnom korelacijom između zbroja bodova DES upitnika i jednim općim pitanjem o procjeni razine stresa (Spearmanov koeficijent korelacije = 0,881; p < 0,001). Divergentna valjanost potvrđena je značajno manjim zbrojem bodova DES upitnika
kod studenata fakulteta koji nisu iz područja biomedicine (t = 7,5, P < 0,001). Zaključak: Izvrsne psihometrijske značajke hrvatske verzije DES upitnika omogućuju njegovu uporabu za evaluaciju razine stresa kod studenata dentalne medicine u hrvatskoj kulturološkoj sredini.
To test the frictional resistance forces (FRS) generated between several archwires and (1) interactive self-ligating (ISL) brackets and (2) conventionally ligated (CL) brackets.
Frictional forces ...produced between three different archwire combinations and self-ligating (SL) brackets (ceramic and metal-slot or all-metal) and CL brackets (metal or ceramic) were evaluated in a dry environment. The three ISL brackets tested were In-Ovation-C, In-Ovation-R, and Damon 3. The three CL brackets were Mystique with Neo Clip, Clarity, and Ovation. Each bracket was tested with 0.020'' SS, 0.019'' x 0.025'' SS and 0.018'' x 0.018'' coated SS.
The ISL brackets generally exhibited the lowest frictional forces irrespective of the bracket material and the wire size, and CL brackets exhibited consistently higher frictional forces. Mystique with Neo Clip produced the lowest frictional resistance of all brackets. The In-Ovation-C brackets demonstrated significantly lower frictional resistance than the SL brackets In-Ovation-R and Damon 3 as well as the CL brackets Clarity and Ovation.
The ISL ceramic brackets produced the lowest frictional resistance of all the self-ligating brackets. The CL ceramic brackets produced the greatest friction.
PDF
