Statement of Problem. Objective and quantitative measurement of implant stability is very important from implant installation to long-lasting maintenance period thereafter. Purpose of study. This study was to evaluate and compare two ISQ and PTVs on the implant stability measurements according to the increased effective implant length. Materials and Methods. Twenty self-tapping fixtures were installed in the bovine scapula and in 10 of those for group I, ISQ and PTVs were obtained in the vertical/horizontal directions according to the increased effective implant length using OsstellTM and Periotest? After stability measurement, removal torques were measured between the after installation and after thread exposure group. Results. ISQ and PTVs showed decreased and increased values according to the increased abutment length. Apart from PTVs, ISQ values were shown higher in horizontal direction to the long axis of bone in both the after installation and the after thread exposure groups. Removal torque values were shown higher in after installation group. Conclusion. From the results of this study, implant stability measurement using resonance frequency analysis was more sensitive and discriminative than PTVs measurement.
Axis, Cervical Vertebra ; Scapula ; Torque

This study is to determine the biomechanical characteristics of Korean adults. Male 32 and female 28 were participated for the measurement which was performed by immersion method and reaction board method. Body segments were head with neck, trunk, upper arm, forearm, hand, thigh, leg and foot. Their volumes were measures by immersion method. Their weight were determined by using Dempster (1955), Drills and Contini (1969) density data. Each COM (center of mass) of body segment weight were determined by specific posture on the reaction board. The postures were asked to the subject total arm-lifted posture, forearm-lifted posture, total leg-lifted posture, leg-lifted posture. According to each posture, the COM of each segment were calculated. Also, center positions of mass according to posture change were estimated. The results were compared with cadaver data from Dempster (1955), Cluaser (1969), Matsui (1958) which are applied very often and also bio data from Lim (1994) and Jung (1993) on Korean adults.
Adult* ; Arm ; Cadaver ; Female ; Foot ; Forearm ; Hand ; Head ; Humans ; Immersion ; Leg ; Male ; Methods ; Neck ; Posture ; Thigh

No abstract available.
Peritoneal Dialysis, Continuous Ambulatory*

The physical conditions of the Korean and the Japanese young adults (aged 18-29) were analyzed for the 10 important body dimensions such as stature, body weight, sitting height, chest circumference, and etc.. The Korean data published in 1979 and 1992 were compared with the Japanese data published in 1984 and 1994, respectively. Also, the physical developments and the sex differences of the Korean in past 13 years were compared with those of Japanese. The results are as follows. 1) The stature, sitting height and perineum height of the Korean young male and female are significantly smaller than those of the Japanese. 2) In the past, the chest circumference, waist circumference, hip circumference, body weight of the Korean are larger values than those of the Japanese. But, there are no significant differences in recent surveys. 3) Most body dimensions of male show significantly larger than those of female in the two countries. 4) There is no significant difference in thigh circumference between the Korean male and female in 1992. 5) There are no significant differences in thigh circumference between the '84 Japanese male and female and in hip circumference between the '94 Japanese male and female. 6) Compared with the results of the past surveys, the relative body weight, perineum height, and chest circumference of female to male are decreased in the two countries. But, the relative hip circumference of female to male are increased in both countries.
Asian Continental Ancestry Group* ; Body Weight ; Female ; Hip ; Humans ; Male ; Perineum ; Sex Characteristics ; Thigh ; Thorax ; Waist Circumference ; Young Adult

Statement of problem. Relatively low success rate of root analogue implant system was supposed to be due to the time duration between extraction and implant installation. The use of three-dimensional computer tomography and the reconstruction of objects using rapid prototyping methods would be helpful to shorten this time. Purpose. This aim of this study was to evaluate the application possibility of the 3-dimensional computer tomography and the rapid prototyping to root analogue implants. Material and methods. Ten single rooted teeth were prepared. Width and height of the teeth were measured by the marking points. This was followed by CT scanning, data conversion and rapid prototyping model fabrication. 2 methods were used; fused deposition modelling and stereolithography. Same width and height of this models were measured and compared to the original tooth. Results. Fused deposition modeling showed an enlarged width and reduced height. The stereolithography showed more exact data compared with the fused deposition modelling. Smaller standard deviation were recorded in the stereolithographic method. Overall width error from tooth to rapid prototyping was 7.15% in fused depostion modelling and 0.2% in stereolithography. Overall height showed the tendency of reducing dimensions. Conclusion. From the results of this study, stereolithography seems to be very predictable method of fabricating root analogue implant.
Tomography, X-Ray Computed ; Tooth

STATEMENT OF PROBLEM: Titanium-Nickel alloy might be used in various prosthetic restorations since it has a unique property such as super-elasticity and high fatigue resistance. However, little is known about the casting ability of this alloy. PURPOSE: This in vitro study compared the casting accuracy and the porosity made with different investments and various sprue designs to ascertain what casting condition would be better for the fabrication of Ti-Ni cast restorations. MATERIAL AND METHODS: A total of 70 Ti-Ni alloy crowns were made and divided into 7 groups of 10 copings on a metal master die. For measuring the effect of the sprue numbers, two groups with one and two 8-gauge sprues were compared. Moreover, the results of the conventional sprue and the double thickness sprues were compared. Three investments were used; carbon free phosphate bonded investment, titanium investment and gypsum bonded investment. The cast restorations were evaluated at 48 points on the entire circumferential margin with a stereomicroscope measuring in micrometers. Each crown was radiographically examined for casting defects and porosity. Data on casting accuracy were analyzed using two-way and Post hoc Scheffe's comparison to determine whether significant differences existed at the 95% confidence level. Student-Newman-Keuls test were performed to identify significant differences in the number of voids. RESULTS: The double sprueing group and double thickness group had significantly less marginal discrepancy than the single sprueing group (P<.05 and P<.01, respectively). The castings with phosphate bonded investment showed the least marginal discrepancy and the smoothest surface. The castings invested in the gypsum bonded investment had the greatest gaps in margin and the largest failure rate. The double sprueing group and phosphate bonded investment group had significantly smaller void numbers and smaller void size than the other groups. CONCLUSION: Within the limitations of this in vitro study, the casting accuracy of the groups using thicker, double sprue design and the phosphate bonded investment was significantly superior. Moreover, void number and size were less than other groups.
Alloys ; Calcium Sulfate ; Carbon ; Celiac Disease ; Crowns ; Fatigue ; Investments ; Porosity* ; Titanium

No abstract available.
Growth and Development*

No abstract available.
Incidence* ; Nurseries* ; Parenteral Nutrition, Total* ; Pharmacy* ; Sepsis*

No abstract available.

We report a case of Buerger's disease manifested by a scrotal mass, in view of its rarity. A tender bean sized mass was palpated in the left scrotum of a 34 year-old male heavy smoker, who had a history of right pain two years ago which subsided spontaneously. The left testis with the paratesticular tissue was excised. Vessels of the spermatic cord and epididymis showed microscopic changes of Buerger's disease. The involved arteries and veins revealed a predominantly subacute pattern with granulomatous inflammation and Langhans' type giant cells within the thrombi.
Male ; Humans