A Research Of Extraction Site Preservation In The Anterior Areas

Aesthetic restoration of teeth is one of the main concerns of patients with tooth losss in the anterior areas.After tooth extraction,alveolar bone loss irreversibly,gingival solf tissue will follow to shink,and the quality of the remaining alveolar bone and soft tissue will seriously affect the patient’s appearance,mental health and social quality of life.The lack of alveolar bone is also a key factor affecting the success rate of implant in the anterior aesthetic.It is generally believed that the alveolar bone is the fastest absorption in the first 3 months after tooth loss,accounting for 70%-80%of the total absorption,and gradually becomes stable after 2 years[1].Bone augmentation technology includes bone splitting,osteotome technique,Distraction Osteogenesis,Maxillary sinus elevation,IAN transposition,Onlay bone grafting,Inlay bone grafting and so on,these techniques can achieve bone augmentation effect,but more traumatic,heavy postoperative reactions and costly.The extraction site preservation can delay the absorption of alveolar bone effectively,increase bone mass,at the same time,have a small trauma.The commonly used extraction sites include minimally invasive tooth extraction,immediate implant replacement,and transplantation of biomaterials in extraction sockets.The use of site preservation techniques to achieve aesthetic effects and imitate the natural teeth maximally has become a hot topic researching in the field of oral science at present.However,there is no consensus on the classification of site preservation,and there are few articles on aesthetic evaluation of anterior tooth.So this article review intends to give an overview on the changes of alveolar bone after extraction,the evaluation of aesthetic effects of anterior teeth,the concept,methods and research progress of site preservation.