No abstract available.
Humans ; Mentors*

No abstract available.
Humans ; Mentors*

No abstract available.
Humans ; Mentors*

No abstract available.
Humans ; Mentors*

No abstract available.
Humans ; Mentors*

No abstract available.
Humans ; Memory* ; Mentors*

STATEMENT OF PROBLEM: Resonance frequency analysis is evaluated as the non-invasive and objective method for the evaluation of implant stability and has been increasingly used. It is necessary to evaluate the factors affect the ISQ measurement stability. PURPOSE: This study was performed to evaluate the effect of the autoclave sterilization and reuse of Smartpeg(TM) on ISQ measurement. MATERIAL AND METHODs: SmartPeg(TM) (Integration Diagnostics Ltd., Goteborg, Sweden) of autoclave group (A) was autoclave sterilized 9 times and Smartpeg(TM) of reuse group (R) was reused 9 times. Ten SmartPeg(TM)s were allocated to each group and after each autoclave sterilization and reuse, implant stability quotient (ISQ) values were measured 3 times from the two directions a and b at a right angle. Osstell(TM) mentor (Integration Diagnostics Ltd., Goteborg, Sweden) was used and type 1 (article no. 100353) Smartpeg(TM) was selected according to SmartpegTM reference list. Osstem Implant US II fixture (Osstem Co., Seoul, Korea) in 4.0 mm x 11.5 mm was embedded in the self-curing acrylic resin (Orthojet(R), Lang Dental, U.S.A.). Data was statistically analyzed by one-way ANOVA (alpha= .05) and scheffe test was done where a significant difference exist. Correlation test was also done between ISQ value and the number of autoclave sterilization or reuse. RESULTS: 1. In autoclave group, the means and sd. of ISQ value before autoclave sterilization were 84.97 +/-0.41, 84.93+/-0.74 at direction a and b. There was significant differences between autoclave groups at direction a and b (P=.000). 2. In reuse group, the means and sd. of ISQ value before reuse were 85.40+/-0.62, 85.50+/-0.57 at direction a and b. There was no significant difference between reuse groups at direction a and b (P>.05). 3. There was a weak positive correlation between the number of reuse and ISQ value at direction a and b (gamma=.207 and .246, P<.01). CONCLUSION: Within the limitations of this study, the following CONCLUSIONs were drawn. Till ninth reuse of Smartpeg(TM), the ISQ measurement stability did not be affected. After twice autoclave sterilization of Smartpeg(TM), the ISQ measurement stability was affected.
Humans ; Mentors ; Seoul ; Sterilization*

PURPOSE: The present study was conducted to identify the correlation between control grade and stereoacuity in basic intermittent exotropia (X[T]). METHODS: Eighty-six patients with basic X (T) were divided into 3 subgroups according to their control grade and the near and distant stereoacuities were evaluated. RESULTS: Group 1; good control group, consisted of 28 patients, group 2; fair control, 30 patients, and group 3; poor control, 28 patients. Mean near stereoacuities measured by the Titmus test were 58.21 arcseconds in group 1, 75.33 arcseconds in group 2, and 151.43 arcseconds in group 3. The mean distant stereoacuities measured by a Mentor B-VAT(R) II-SG videoacuity tester were 118.93 arcseconds in group 1, 165.33 arcseconds in group 2, and 276.43 arcseconds in group 3. When comparing the 3 groups, the poorer the control grade, the worse were the near and distant stereoacuities (p = 0.002, p < 0.001). When compared in pairs, however, group 1 showed a better near stereoacuity than groups 2 and 3 (p = 0.02, p = 0.002, respectively), while group 2 and group 3 did not show any distinct differences (p = 0.13). Group 1 also showed a better distant stereoacuity than groups 2 and 3 (p = 0.02, p < 0.001, respectively), as did group 2 compared to group 3 (p < 0.001). CONCLUSIONS: Control grade and distant stereoacuity have significant correlation in patients with basic X (T) and can function as helpful indicators for monitoring the deterioration and progression of exodeviation.
Exotropia ; Humans ; Mentors

PURPOSE: The purpose of this study was to evaluate and compare the binocular function in patients with basic and simulated divergence excess types of intermittent exotropia [X(T)]. METHODS: Seventy-seven patients, 46 basic type and 31 simulated divergence excess type, were studied by Worth 4-dot test (W4D), Polarized 4-dot test (P4D), Titmus test, and distance stereoacuity test using Mentor B-VAT(R)II videoacuity tester. RESULTS: Near W4D, distant W4D and distant P4D were fused in 71.7%, 8.6% and 52.2% in basic type and in 100%, 25.8% and 87.1% in simulated divergence excess type, respectively. The fusion rate in simulated divergence excess type was significantly higher, than in basic type (P=0.001, 0.04, 0.001). However, the difference in near P4D between the two types was not significant (P=0.24). In distance stereoacuity test, basic type showed 272 seconds and simulated divergence excess type showed 177 seconds, showing a significant difference (P=0.02). There was no significant difference in near stereoacuity between the two types (P=0.08). CONCLUSIONS: The study demonstrated a difference in binocular function in patients with basic and simulated divergence excess types of X(T). A better binocular function was observed in the latter group.
Exotropia* ; Humans ; Mentors ; Telescopes*

PURPOSE: The present study was aimed to evaluate the influence of implant contact ratio and stiffness of implant-surrounding materials on the resonance frequency analysis (RFA) values. MATERIALS AND METHODS: Seventy resin blocks that had the different amounts (100, 50, 30, 15%) of resin-implant contact (RIC) were fabricated. Ten silicone putty blocks with 100% silicone-implant contact were also made. The implants with O5.0 mm x 13.0 mm were placed on eighty specimen blocks. The RFA value was measured on the transducer that was connected to each implant by Osstell Mentor. Kruskal-Wallis and Scheffe's tests (alpha=.05) were done for statistical analysis. RESULTS: The control resin group with 100% RIC had the highest RFA value of 83.9, which was significantly different only from the resin group with 15% RIC among the resin groups. The silicone putty group with 100% contact had the lowest RFA value of 36.6 and showed statistically significant differences from the resin groups. CONCLUSION: Within the limitations of this in vitro study, there was no significant difference in the RFA values among the resin groups with different RIC's except when the RIC difference was more than 85%. A significant increase in the RFA value was observed related to the increase in stiffness of material around implant.
Humans ; Mentors ; Silicones ; Transducers