Deepak Chandrasekharan

Tooth extraction for orthodontic purposes has been a controversial topic for the past century . This conflict is still brewing among orthodontists nowadays. Modern practitioners seem to have reached a middle ground when it comes to the decision to extract or not to extract. Space closure can be achieved using one of the two methods, either sliding mechanics (frictional mechanics) or closing loops (frictionless mechanics). En-masse retraction is a valuable technique in orthodontics, offering benefits in anchorage preservation and treatment efficiency. However, its application should be individualized, considering the specific needs and conditions of each patient.

Clear Aligner is a modern orthodontic device designed to straight the teeth discreetly. Made from transparent, medical grade plastics, it fits snugly over the teeth and gradually shift to desired position. In this text book there is overview of case selection, staging, treatment planning in various malocclusion. Many different types of aligners are available today throughout the world and marketed to treat everything from mild to more complex malocclusions.

Orthognathic Surgeries are being carried out in adults who needtreatment for their dentoskeletal deformities. A good surgicalplanning should be there when moving forward to Orthognathicsurgeries. The Conventional Orthognathic Approach (COA) hasthree phases- Pre- Surgical Orthodontic Phase, Skeletal SurgicalCorrection and Post- Surgical Orthodontic Phase. An alternatesurgical approach came which was called as "Surgery First Orthognathic Approach" (SFOA). The rise of SFOA even though showed some controversies, has lately became popular among Orthodontists. The SFOA bypasses the Pre- surgical orthodontic phase and directly enters to the skeletal surgical correction phase. By this there's a reduction in treatment duration and provides earlyimprovement in the facial esthetics. In this book, a proper understanding of treatment planning and procedures involved will be discussed in detail.

A conce o e o fabrico assistidos por computador (CAD e CAM) substitu ram significativamente a conce o e o fabrico tradicionais. Para encurtar substancialmente o tempo de desenvolvimento de padr es, moldes e prot tipos, muitas empresas de fabrico em todo o mundo come aram a utilizar m todos de prototipagem r pida para a cria o de padr es complexos e de prot tipos de componentes. Estas tecnologias s o capazes de gerar diretamente objectos f sicos a partir de bases de dados CAD. T m uma carater stica comum importante: a pe a prot tipo produzida adicionando materiais em vez de os remover. Isto simplifica os processos de produ o de pe as tridimensionais (3D), reduzindo ao m nimo o desperd cio de material em rela o aos processos de adi o de camadas 2D, de modo a que uma pe a possa ser produzida diretamente a partir do seu modelo inform tico.

A reabsor o radicular causada pela movimenta o dent ria ortod ntica um fen meno nico e indesej vel que pode ocorrer em qualquer n vel de tratamento cl nico. Pode ser afetado por muitos fatores, como a mec nica de tratamento utilizada, fatores relacionados ao tipo e magnitude das for as aplicadas e outros fatores relacionados ao tratamento, como os tipos de movimenta o dent ria e contatos prematuros. O progn stico do tratamento ortod ntico est diretamente relacionado sua detectabilidade e remo o efetiva do fator desencadeante cl nico. Nesse livro, v rios fatores ortod nticos e biol gicos que podem causar reabsor es radiculares e a avalia o das reabsor es radiculares por meio de v rios m todos de imagem s o discutidos em detalhes.