Optimizing Maxillomandibular Position in Orthognathic Surgery: Introducing the T Concept in Treatment Planning.

: Orthognathic surgery aims to align the jaws with the facial skeleton and correct dental occlusion. This paper introduces the concept of planning the maxillomandibular complex (MMC) as a whole, utilizing a t-forming set of landmarks: the maxillary central incisor, the chin, and the occlusal plane. : The background, hypothesis, and rationale of the new T concept are explained. A case of a 28-year-old male with skeletal class III malocclusion and an open bite was used to illustrate the application of the T concept in step-by-step surgical planning. The planning encompasses four phases: Phase One involves correcting frontal deformity and various asymmetries, Phase Two involves correcting chin anterior-posterior deformity, Phase Three involves correcting anterior-posterior and vertical MMC position, and Phase Four involves correcting MMC rotation. : The T concept provided a structured approach to plan MMC as a whole and integrate all structures into harmony. : The T concept provides a logical approach to MMC positioning in orthognathic surgery, addressing functional and aesthetic concerns. It acts as a checkpoint to verify MMC position, helping surgeons achieve better results and avoid compensatory procedures.