Before "piling" dental implants, Dr. Liu Zhengqiu increased and strengthened alveolar bone, which won the appreciation of international colleagues. 16 patients with maxillary alveolar bone atrophy were successfully implanted with Mr. Xu, with a 58-year-old tooth. His upper right tooth has fallen off for many years. He used the general dental inlay method to insert dentures, but after a long time, the steel wire that fixed the dentures also loosened the good teeth next to them. A year ago, he decided to plant teeth. However, Mr. Xu went to several hospitals for dental treatment. X-ray examination showed that the height of his right maxillary alveolar bone had shrunk to 3 mm, and the height of his right maxillary alveolar bone was generally greater than 10 mm before he could implant teeth. Otherwise, the implant nail will pierce the maxillary sinus membrane and communicate with the nasal cavity, causing infection and so on, and the operation will fail. So the doctor told him that it was better to insert ordinary teeth instead of dental implants. Not satisfied, Mr. Xu found the Pacific oral cavity again. To xu teacher's delight, Dr. Liu Zhengqiu actually said that dental implant technology can be used for restoration, but it is not simple planting, but planting nails on the basis of maxillary sinus elevation. Liu Zhengqiu said that the maxillary sinus communicating with the nasal cavity is separated from the maxillary alveolar bone by a membrane, just like the membrane between eggshell and egg white. Normal maxillary alveolar bone is firm, thick and high, and dental implants will not touch the membrane, but after the maxillary alveolar bone shrinks, dental implants may pierce the membrane during implantation. In order to solve this problem, Liu Zhengqiu used a special ultrasonic osteotome to drill a small hole in the side wall of maxillary alveolar bone, carefully separated the maxillary alveolar bone from the membrane, raised the maxillary sinus membrane to a suitable height, then filled in artificial bone, autologous bone and autologous blood growth factor, and implanted dental implants at the same time. It's like building a house in a pond with soft foundation. Fill the foundation with mud and stones first, and then pile to build the house. Liu Zhengqiu used this technique to implant two implant nails for Mr. Xu. After half a year, they grow very firmly, and then put teeth on the implant nails. Mr. Xu is very satisfied. It is understood that Dr. Liu Zhengqiu has used this technology to implant teeth for 16 patients with severe maxillary alveolar bone atrophy, including a 64-year-old woman, who implanted 9 teeth at a time. Dr. Liu also reminded the public that dental diseases should be treated early and teeth missing should be planted early, otherwise the alveolar bone will degenerate and shrink. The picture shows Dr. Liu Zhengqiu (left) and Dr. Yu Zhenyu taking a group photo in Korea. Invited to Korea to discuss dental implant skills with Korean dentists. Changzhou Pacific Stomatology is a high-grade stomatological institution founded by Dr. Liu Zhengqiu, a doctor studying in Japan. The clinic implements membership system and appointment system, and uses the most advanced dental technology to serve patients. Many foreign friends who work in Changzhou suffer from dental diseases, and they all admire Pacific Stomatology and become its members. Recently, Dr. Liu Zhengqiu visited Korea at the invitation of Dr. Yu Zhenyu, Dean of Zhenhai Stomatological Hospital of Korea, to learn dental implant technology. During the visit, Dr. Liu also changed into a surgical gown. Together with Dr. Yu, he performed bilateral maxillary sinus lifting and tooth implantation for a patient with complete tooth loss, which lasted for 3 hours and implanted 24 teeth. Dr. Yu is very appreciative of Dr. Liu Zhengqiu's extramaxillary sinus lifting. Dr. Yu Zhenyu graduated from the Department of Dentistry of Seoul National University, and later studied in Europe and the United States, where he received a doctorate in dental implant restoration. He was hired as a visiting professor of dental implants by Michigan Dental University in the United States, and is currently the president of Zhenhai Stomatological Hospital in Korea. He made an in-depth study of the world-famous implant system. Dr. Yu is 60 years old and has planted more than 50,000 teeth, which is rare in Korea and even in the world. According to Dr. Yu, at present, more than 90% of patients with tooth loss in Korea use dental implants for restoration. South Korea consumes more than 600,000 dental implants every year, and 95% of dental clinics implant teeth. Dental implants have become a routine repair method for patients with tooth loss in Korea. In China, people's understanding of dental implants is only a matter of recent years, and their acceptance is not high. The population is many times that of South Korea, but the annual consumption of dental implants is only 1/6 of that of South Korea. Dr. Liu Zhengqiu said that it is necessary to vigorously publicize and improve dental implant skills so that more people in China can understand and enjoy high-level dental implant repair technical services. Both Dr. Yu and Dr. Liu have the experience of serving the people after studying abroad, which caused a * * * sound for Dr. Liu Zhengqiu to provide Pacific dental service after returning to China.