Minimal long-term data exist on the stability of the correction supplier Everolimus of the depth and shape of the curve of Spee and factors influencing it. Therefore, the present study was conducted to evaluate the

post-retention development of the curve of Spee and to assess the dental and skeletal parameters as predictors of its post-retention stability. Materials and Methods Collection of materials Pre-treatment (Tl), post-treatment (T2) and post-retention (T3) dental casts and lateral cephalograms of 24 orthodontically treated patients having a mean age of 14.5 years, with minimum age being 11 years and a maximum being 26 years were evaluated at Department of Orthodontics and Dentofacial Orthopedics, Bapuji Dental College and Hospital, Davangere. The mean period of the study group after

retention was up to 2.6 years (range = 1-5 years). Materials used in the study Pre-treatment, post-treatment, and post-retention dental casts and lateral cephalograms of orthodontically treated patients. Laptop used in the study (COMPAQ AMD ATHLON X2, WINDOWS VISTA) with Adobe Photoshop CS2-9.0 (Adobe Photoshop windows vista 7, Adobe Systems Co) version installed. Acetate tracing paper of 0.003 inch thickness 0.3 mm lead pencil. Digital camera: Nikon-Coolpix LS, (Optical Zoom 5×, 7.2 Megapixels). A standardized photographic setup was used. Method of collection of data Plaster casts were used to make the measurements before starting the treatment (Tl), after completing the orthodontic therapy (T2), and after 2 years

(mean) post-retention (T3). To photographically record the right side of Tl, T2, and T3, we made use of a digital camera mounted on a standardized photographic setup; 25 cm was the object to camera distance (Figure 1). Figure 1 A standardized photographic set up used to capture the right side of the lower cast and connected to the laptop to measure the curve of Spee using Adobe Photoshop CS2-Version 9. The photographs were analyzed using Adobe Photoshop CS2-9.0 version software to determine the steepness of the curve of Spee in pre-treatment, post–treatment, and post-retention casts.5,6 On each of the photo present on the right side of the lower cast, an orientation line was made from the incisal edge of central incisor up to the distal cusp tip of the last erupted the molar. Perpendicular line was drawn from GSK-3 this reference line to the mesiobuccal cusp of the first molar, which gives the depth of the curve of Spee. Pre-treatment, post-treatment, and post-retention radiographs were traced7 (Figure 2). Figure 2 A standardized photographic set up used to capture the right side of the lower cast. Each cephalogram was taken with the patient’s teeth in habitual occlusion and lips at rest position. Cephalograms were taken in the same machine in order to maintain the standardization.8 Profile cephalograms were taken in occlusion under standardized conditions with a cephalostat.