Dental implant technology, known as dental history of the 20th century the most notable one of the major advances in oral medicine is the fastest growing in recent years as a professional. Since 1965 the formal launch of the Swedish scientist Branemark-type bone-type titanium screw implant system has been planted in the mouth over the past 40 years, both in the design of the implant itself, or its clinical applications have made remarkable progress . In Western countries, dental implants has received a wide range of popular and applied, in the country, dental technology has been gradually growing in the promotion and application of large and medium cities. According to rough statistics, in 2005 alone, the U.S. FDA, European CE Dental Implant system registered 140 kinds of U.S. consumption in 2005 reached 100 million units of dental implants, and Europe reached 1.8 million units. By 2009, the world and achieved a number of times dental implant growth. Dental implants not on ly a thorough update of the traditional dental science content and concepts to solve the traditional prosthetics in the long-term difficult to solve the problem, such as the lack of free-end repair, severe atrophy of edentulous alveolar repair dentition, with dentition defect repair of bone defects, periodontal disease in patients with missing teeth fixed, and successfully used for tumor resection surgery, jaw functional jaw reconstruction, facial organs missing after prosthetic restoration. The international market or oral implant rehabilitation in clinical implant system is the most used bone implant system can be said that these types of cropping systems on behalf of the current type of dental implants in the clinical mainstream.
The upper part of the implant and abutment connection: connection in connection with the outer
Repair implant abutment with the top of the connection required by a certain structure connected to complete the repair, and its connection structure to determine its connection, where the top of the implant shoulder is still a certain degree of mechanical structure, and is used with the base computer connected to Introduced within the implant tooth bone those, known as the external connection, such as the classic Branemark implant system in the implant has a height of 0.7mm above the outer structure of the six-party connection, repair the base station through the base bolted to the outside of the central hexagonal structure , similar to the connection there 3I system, Steri-oss systems. All over the implant shoulder is no structure exists, but through the extension of the repair of base stations stretching from the bottom to connect to the internal implant is called within a fixed connection, such as ITI system, Frialit-2 system in the six-party connections .
Implant connection structure has three important functions, 1. Connect the implant and superstructure. 2. Anti-rotation. 3. Passing scattered teeth together. Directly affect the function of the implant success rate of repair and long-term effects, so the connection is that the implant can be classified as the first difference between cropping systems point. With the widespread clinical application of implant, in connection proved better on the bite force capacity, suits the connection because of What circumstances do dental implant some inherent design flaws, there is a tendency. Outer-join system, if the implant is not fully consistent with the top bolt can be fixed at a greater stress concentration, resulting in broken bolts; In addition, because the base station completely dependent on locking bolt on the implant, the locking bolts after there exist a certain stress, long-term effect will also lead to stress concentration at the break.
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