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

Cerivical rib syndrome, one of four common causes of thoracic outlet syndromes, have similar symptoms which accidentally discovered in simple x-ray and needs to be distinguished with other syndromes. Thoracic outlet syndromes are classified according to anatomical structures that causes symptoms; cervical rib syndrome, scalenus anticus syndrome, costoclavicular syndrome and hyperabduction syndrome. Various treatments for thoracic outlet syndromes have been introduced, such as; conservative care, excision of cervical rib and first rib and release of anterior scalenus muscle by supraclavicular approach and excision of cervical rib and first rib by axillary approach. We would like to report a case on a 16 years old girl and a 21 years old man who had cervical rib syndrome and treated successfully without excision of the first rib but excised cervical rib and released anterior scalenus muscle by supraclavicular approach.
Cervical Rib ; Cervical Rib Syndrome ; Muscles ; Ribs ; Thoracic Outlet Syndrome

Cervical rib is a normal asymptomatic congenital bone abnormality that occurs in 0.4% of the population; 70% of these cases are bilateral. Cervical ribs are found incidentally on routine radiographs, though sometimes patients complain of a hard or pulsatile neck mass in the supraclavicular area. Although most of these ribs produce no symptoms and need no therapy, a few cases are symptomatic and require treatment. Furthermore, a cervical rib can displace the great vessels superiorly and may cause iatrogenic hemorrhage during neck surgery. Thus, otorhinolaryngologists should be aware of the diagnosis and management of this condition in patients with a neck mass. Here, we report three cases of cervical rib and include a review of literature.
Cervical Rib ; Hemorrhage ; Humans ; Neck ; Ribs ; Thoracic Outlet Syndrome

No abstract available.
Hyperplasia* ; Ribs*

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

No abstract available.
Ribs* ; Transplants*

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*

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

No abstract available.
Mandibular Reconstruction* ; Ribs* ; Transplants*

No abstract available.
Immobilization* ; Rib Fractures* ; Ribs*