1.Influence of implant fixture design on implant primary stability.
Gap Yong OH ; Sung Hwa PARK ; Seok Gyu KIM
The Journal of Korean Academy of Prosthodontics 2007;45(1):98-106
STATEMENT OF PROBLEM: Current tendencies of the implant macrodesign are tapered shapes for improved primary stability, but there are lack of studies regarding the relationship between the implant macrodesign and primary stability. PURPOSE: The purpose is to investigate the effect of implant macrodesign on the implant primary stability by way of resonance frequency analysis in the bovine rib bones with different kinds of quality. MATERIAL AND METHOD: Fifty implants of 6 different kinds from two Korean implant systems were used for the test. Bovine rib bones were cut into one hundred pieces with the length of 5 cm. Among them forty pieces of rib bones with similar qualities were again selected. For the experimental group 1, the thickness of cortical part was measured and 20 pieces of rib bones with the mean thickness of 1.0mm were selected for implant placement. For the experimental group 2, the cortical parts of the remaining 20 pieces of rib bones were totally removed and then implants were placed on the pure cancellous bone according to the surgical manual. After placement of all implants, the implant stability quotient(ISQ) was measured by three times, and its statistical analysis was done. RESULTS: There are statistically significant differences in ISQ values among 4 different kinds of Avana system implants in the experimental group 2. For the experimental group 1, Avana system implants showed significantly different ISQ values, but when differences in the thickness of cortical parts were statistically considered, did not show any significant differences in ISQ values. Among Oneplant system implants, there are no significant differences in ISQ values for the experimental group 2 as well as for the experimental group 1. CONCLUSION: Within the limits of this study, bone quality and implant design have some influences on the primary stability of implants. Especially in the bone of poor quality, tapered shape of implants are more favorable for the primary stability of implants.
Ribs
2.Evaluation of the Rib Seriation Using Analysis of Quantitative Methods in Koreans.
Deog Im KIM ; Seung Ho HAN ; Yi Suk KIM ; Dae Kyoon PARK ; U Young LEE ; In Hyuk CHUNG
Korean Journal of Physical Anthropology 2009;22(2):127-137
Rib seriation has not been used to identify individual human skeletal remains in Koreans. Accurate rib seriation is important for determining rib number and for establishing an individual's age at death. The aim of this study was to use a previously published quantitative method to correctly predict rib sequencing in Koreans. We used complete rib sets of 54 individuals and measured three variables: AFTAL (articular facet of the tubercle-toangle length), HAFL (head-to-articular facet length), and SCTCH (superior costo-transverse crest height). AFTAL and SCTCH were more useful than HAFL for predicting rib seriation, and AFTAL produced the simplest equation for determining sex. In the ranking, the cumulative percentage of AFTAL was 79% with an error of 0, and the range of seriation error was +/-4. Compared to other studies using European measures, AFTAL showed greater accuracy of rib seriation in this study of Korean ribs. In fact, both AFTAL and AFTAL with SCTCH accurately predicted rib 4 in 94% of cases. AFTAL was the most accurate, and use of both SCTCH and AFTAL yielded better results than either alone. Thus, the high accuracy and predictive ability showed that this method is useful for measuring rib seriation in Koreans.
Humans
;
Ribs
3.Focal Hematopoietic Hyperplasia of Rib: A Rare Pseudotumor and Review of Literature.
Maneesh VIJAY ; Asit Ranjan MRIDHA ; Ruma RAY ; Prateek KINRA ; Biplab MISHRA ; H S CHANDRASHEKHAR
Journal of Pathology and Translational Medicine 2015;49(2):159-162
No abstract available.
Hyperplasia*
;
Ribs*
4.Radical correction of fronto-spheno-orbito-zygomatico-maxillo-ethmoido-nasal fibrous dysplasia by autogenous calvarial and rib bone graft.
Chul Gyoo PARK ; Hong Yong PARK
Journal of the Korean Society of Plastic and Reconstructive Surgeons 1992;19(3):435-441
No abstract available.
Ribs*
;
Transplants*
5.Eleven Levels of Spinous Process Fractures in Thoracolumbar Spine.
Whoan Jeang KIM ; Yong Joo CHI ; Kyung Hoon PARK ; Won Sik CHOY
Asian Spine Journal 2014;8(6):852-855
Cases of over 5-level spinous process fractures are extremely rare. Thoracolumbar region of spine is superimposed on ribs; and as such additional studies such as computerized tomography are needed to diagnose fractures in this region. We report a case of 11 contiguous level thoracolumbar spinous process fractures, which has been treated conservatively.
Ribs
;
Spine*
6.Surgical immobilization using judet's strut for flail cehst with multiple rib fractures.
Ja Hong KU ; Oh Woo KWON ; Chang Hoi KIM ; Yo Han KIM ; Sung Soo CHAE
The Korean Journal of Thoracic and Cardiovascular Surgery 1993;26(1):64-66
No abstract available.
Immobilization*
;
Rib Fractures*
;
Ribs*
7.The effect of various thread designs on the initial stability of taper implants.
Ju Hee PARK ; Young Jun LIM ; Myung Joo KIM ; Ho Beom KWON
The Journal of Advanced Prosthodontics 2009;1(1):19-25
STATEMENT OF PROBLEM: Primary stability at the time of implant placement is related to the level of primary bone contact. The level of bone contact with implant is affected by thread design, surgical procedure and bone quality, etc. PURPOSE: The aim of this study was to compare the initial stability of the various taper implants according to the thread designs, half of which were engaged to inferior cortical wall of type IV bone (Group 1) and the rest of which were not engaged to inferior cortical wall (Group 2) by measuring the implant stability quotient (ISQ) and the removal torque value (RTV). MATERIAL AND METHODS: In this study, 6 different implant fixtures with 10 mm length were installed. In order to simulate the sinus inferior wall of type IV bone, one side cortical bone of swine rib was removed. 6 different implants were installed in the same bone block following manufacturer's recommended procedures. Total 10 bone blocks were made for each group. The height of Group 1 bone block was 10 mm for engagement and that of group 2 was 13 mm. The initial stability was measured with ISQ value using Osstell mentor(R) and with removal torque using MGT50 torque gauge. RESULTS: In this study, we found the following results. 1. In Group 1 with fixtures engaged to the inferior cortical wall, there was no significant difference in RTV and ISQ value among the 6 types of implants. 2. In Group 2 with fixtures not engaged to the inferior cortical wall, there was significant difference in RTV and ISQ value among the 6 types of implants (P < .05). 3. There was significant difference in RTV and ISQ value according to whether fixtures were engaged to the inferior cortical wall or not (P < .05). 4. Under-drilling made RTV and ISQ value increase significantly in the NT implants which had lower RTV and ISQ value in Group 2 (P < .05). CONCLUSIONS: Without being engaged to the inferior cortical wall fixtures had initial stability affected by implant types. Also in poor quality bone, under-drilling improved initial stability.
Ribs
;
Swine
;
Torque
8.An experience with a free vascularized myo-osteochondral rib graft for mandibular reconstruction.
Jong Ho LEE ; Ku Jong SEO ; Kwang PARK ; Moo Kang JUNG ; Gee Duk PARK ; Jung Jae JEONG
Journal of the Korean Association of Oral and Maxillofacial Surgeons 1993;19(2):115-124
No abstract available.
Mandibular Reconstruction*
;
Ribs*
;
Transplants*
9.Clinical and retrospective study of costochondral rib grafting.
Journal of the Korean Association of Oral and Maxillofacial Surgeons 1993;19(3):301-311
No abstract available.
Retrospective Studies*
;
Ribs*
;
Transplants*
10.A comparison of bone bed preparation with laser and conventional drill on the relationship between implant stability quotient (ISQ) values and implant insertion variables.
Su Young LEE ; Chunmei PIAO ; Seong Joo HEO ; Jai Young KOAK ; Joo Hee LEE ; Tae Hyung KIM ; Myung Joo KIM ; Ho Beom KWON ; Seong Kyun KIM
The Journal of Advanced Prosthodontics 2010;2(4):148-153
PURPOSE: The aim of this study was to investigate a comparison of implant bone bed preparation with Er,Cr:YSGG laser and conventional drills on the relationship between implant stability quotient (ISQ) values and implant insertion variables. MATERIALS AND METHODS: Forty implants were inserted into two different types of pig rib bone. One group was prepared with conventional drills and a total of 20 implants were inserted into type I and type II bone. The other group was prepared with a Er,Cr:YSGG laser and a total of 20 implants were inserted into type I and type II bone. ISQ, maximum insertion torque, angular momentum, and insertion torque energy values were measured. RESULTS: The mean values for variables were significantly higher in type I bone than in type II bone (P < .01). In type I bone, the ISQ values in the drill group were significantly higher than in the laser group (P < .05). In type II bone, the ISQ values in the laser group were significantly higher than in the drill group (P < .01). In both type I and type II bone, the maximum insertion torque, total energy, and total angular momentum values between the drill and laser groups did not differ significantly (P > or = .05). The ISQ values were correlated with maximum insertion torque (P < .01, r = .731), total energy (P < .01, r = .696), and angular momentum (P < .01, r = .696). CONCLUSION: Within the limitations of this study, the effects of bone bed preparation with Er,Cr:YSGG laser on the relationship between implant stability quotient (ISQ) values and implant insertion variables were comparable to those of drilling.
Mandrillus
;
Ribs
;
Salicylates
;
Torque