重庆医科大学附属口腔医院 保持 Retention 重庆医科大学口腔正畸教研室 吴杨
保 持 Retention 重庆医科大学口腔正畸教研室 吴杨 重庆医科大学附属口腔医院
CHAPTER OUTLINE ●Definition Why is Retention Necessary ●Basic Theorems ●Retainer ●Timing of retention ●Relapse
CHAPTER OUTLINE ⚫ Definition ⚫ Why is Retention Necessary ⚫ Basic Theorems ⚫ Retainer ⚫ Timing of retention ⚫ Relapse
Retention The final phase of orthodontic treatment is retention.Teeth that have been moved in or through bone by mechanical appliances have a tendency to return to their former positions.It is the purpose of retention to counteract this tendency
Retention The final phase of orthodontic treatment is retention. Teeth that have been moved in or through bone by mechanical appliances have a tendency to return to their former positions. It is the purpose of retention to counteract this tendency
Retention A working definition of retention in relation to orthodontics might be stated as follows:the holding of teeth in ideal esthetic and functional positions Relapse has been defined by the British Standards Institute as the return,following correction,of the features of the original malocclusion
Retention A working definition of retention in relation to orthodontics might be stated as follows: the holding of teeth in ideal esthetic and functional positions. Relapse has been defined by the British Standards Institute as the return, following correction, of the features of the original malocclusion
Retention Retention should not be relegated to being an afterthought at the end of treatment;it should be considered at the planning stage and explained to the patient as an integral part of the overall treatment
Retention Retention should not be relegated to being an afterthought at the end of treatment; it should be considered at the planning stage and explained to the patient as an integral part of the overall treatment
Retention Orthodontic treatment ↓↓ Active treatment Retention
Orthodontic treatment Active treatment Retention Retention
Retention The requirements for retention are often decided at the time of diagnosis and treatment planning.The correct diagnosis, logical treatment plan,and the timing of treatment plan must be directed toward ideal esthetics,ideal function,and the permanent maintenance of these ideals
Retention The requirements for retention are often decided at the time of diagnosis and treatment planning. The correct diagnosis, logical treatment plan, and the timing of treatment plan must be directed toward ideal esthetics, ideal function, and the permanent maintenance of these ideals
Retention A satisfactory balance of utility,beauty, and stability often simplifies (and may even avoid)retention by mechanical appliances. On the other hand,incorrect diagnosis or treatment complicates the requirements for retention
Retention A satisfactory balance of utility, beauty, and stability often simplifies (and may even avoid) retention by mechanical appliances. On the other hand, incorrect diagnosis or treatment complicates the requirements for retention
Retention There is only one way to completely avoid relapse.At the end of treatment,remove the braces,polish the teeth,make study models and take photographs.And then take the patient out the back door of the office and shoot him Dr Tom Graber DMD South African Dental Congress.August 1992
There is only one way to completely avoid relapse. At the end of treatment, remove the braces, polish the teeth, make study models and take photographs. And then take the patient out the back door of the office and shoot him - Dr Tom Graber DMD South African Dental Congress. August 1992 Retention
Why is Retention necessary ● Reorganization of gingival and periodontal tissues after orthodontic treatment Soft tissue pressure relapse tendency. Changes produced by growth may alter treatment results
⚫ Reorganization of gingival and periodontal tissues after orthodontic treatment. ⚫ Soft tissue pressure – relapse tendency. ⚫ Changes produced by growth may alter treatment results. Why is Retention necessary ?