The aims of this paper were to validate a modification of an extended total temporomandibular joint replacement (eTMJR) classification system and develop a classification schematic for ease of reference. High volume TMJ surgeons were asked to score 20 separate eTMJR devices using the updated classification system and inter-rater variability was calculated. Using the modified classification system developed, a Conger's kappa (k) coefficient of 0.53 was returned, suggesting moderate to good levels of agreement.
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