Condylar Guidance: Correlation between Protrusive Interocclusal Record and Panoramic Radiographic Image: A Pilot Study

Abstract

Within the limitations of this study, it was concluded that the protrusive condylar guidance angles obtained by panoramic radiograph may be used in programming semi-adjustable articulators.

Condylar guidance angles obtained from panoramic radiographic images: An evaluation of their reproducibility

“…The panoramic radiographic image was taken with the Frankfurt horizontal plane parallel to the floor of the mouth; a cephalostat was used to align the head in that position, as in Tannamala et al 14 The radiograph was made using a ProMax ® radiographic unit (Planmeca, Helsinki, Finland 2005) at 74 kVp and 10 mA. 9,14 The method was the same as that described previously by Loster et al 15 The chosen digital image was converted to analog and printed on A4 size (ISO 216) paper using an Epson Stylus Photo 1400 (Seiko Epson Corporation, Japan, 2007) inkjet printer; the resolution used was 2880 × 1440 dots per inch.…”

“…9,14 The method was the same as that described previously by Loster et al 15 The chosen digital image was converted to analog and printed on A4 size (ISO 216) paper using an Epson Stylus Photo 1400 (Seiko Epson Corporation, Japan, 2007) inkjet printer; the resolution used was 2880 × 1440 dots per inch. One copy was provided to each of the participants, who were recruited from the Prosthodontic Department of the Jagiellonian University.…”

“…Afterwards, an image from Gilboa et al was presented to illustrate the differences between the position of the zygomatic arch and the auricular eminence on the panoramic radiographic image. 9 The participants were then asked to mark the most superior point of the mandibular fossa and the most inferior point of the curvature of the articular tubercle, following the procedure of Tannamala et al 14 The study was conducted simultaneously with all participants. The annotated photographs were numbered and scanned (Digital Photo Scanner Epson Perfection V370 Photo, Seiko Epson Corporation, Japan, 2012) to produce a digital image.…”

“…The pilot study of Tannamala et al compared the condylar angles set in the semi-adjustable articulator using an intraoral protrusive record to those from the panoramic radiographic image, and showed that the method is a simple and easy way to program the articulators and is capable of producing clinically acceptable restorations. 14 The study was performed on a group of 10 patients who were free of the signs and symptoms of temporomandibular disorders, and who also possessed intact dentition. The study involved different individuals, with specific anatomy, and each image was examined only once; the condylar angles were compared, with results being received after intraoral registration.…”

Letter to the Editor

“…But in Tannamala et al's research, 2 we feel there may be a few problems. First, the author used a method similar to Gilboa et al, 1 by depicting a line between “the most superior and the most inferior points of the curvatures.” 2 But where were the curvatures? And what did the curvatures stand for?…”