“…Interestingly, from 26 articles that used CO according to CAT1, 24 reported GPT editions from 1987-2017 in their references, while one cited GPT from both 1956-1977 and 1987-2017 editions. In these reports, GPT was used to define other concepts, such as 'centric relation', 'gnathology', 'occlusal harmony', 'occlusal stability', 'dental occlusion', 'physiological occlusion', or even to report the discrepancy between centric relation and MIC, [23][24][25][26][27][28] but not for CO definition. [34][35][36][37][38][39] In addition, from 21 articles that used CO according to CAT 2, 18 cited some GPT editions from 1987-2017 in their references, while three cited GPT from 1956-1977 and 1987-2017 editions.…”