The orthodontic treatments are associated with the movement of the tooth achieved by the involvement of the periodontal ligament that unites the roots of the tooth with the alveolar bone. The forces used to achieve best results for the orthodontic treatment creates stress on the periodontal ligament that promotes traction of bone, bone resorption and tooth movement. During the process of the orthodontic treatment it is essential to maintain a healthy periodontium. Mostly the fixed orthodontic treatment could deteriorate periodontal health because of the wear and tear of the biofilm that access the pathogenic micro-flora to grow. In this study the knowledge and awareness of the dental doctors in Dammam is surveyed to determine the association of periodontitis with the orthodontic treatment. About 89 dental doctors participated in this study, 66 (74.2%) were female participants and 23 (25.8%) were male participants. Around 87 (97.7%) of the dental doctors of Dammam feels that periodontal complications are caused in the patients treated with orthodontics. The dental Doctors of Dammam have comparatively good knowledge about the relationship between the orthodontic treatment and the periodontal diseases. The orthodontist and the periodontist need to do research and development to avoid the periodontal disease during and after the orthodontic treatment.