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.
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*

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.
Hyperplasia* ; Ribs*

No abstract available.
Cartilage* ; Ribs* ; Transplants*

The authors performed occipito-cervical(C2-3) fusion in a case of atlanto-axial subluxation caused by congenital seperation of dens. At first posterior cervical fusion(C1-2-3) with rib graft was performed, but several days after the operation C1-2 subluxation developed again with cervical cord compression syndrome. In the second operation, the occiput was included in the fusion after removal of the posterior neural arch of atlas which resulted in good reduction and marked improvement in neurologic symptoms.
Neurologic Manifestations ; Ribs ; Transplants

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