Abstract
This paper is to present a case of a patient with moderate periodontal disease and dual bite and discuss importance of assessment and diagnosis and how to utilize splint to achieve stable occlusion.<Clinical Summary> At the time of the first visit the female patient was 60 years old; probing pocket depth exceeded 6mm in some areas; in the occlusal examination lack of occlusal contact was observed in the molar region at the habitual closure position; and cuspal interference occurred on the left and right second molars during lateral movement and group function were seen on both sides. Premature contact occurred between 7 and 7 upon the closure with the jaw muscles relaxed. <Therapeutic Process> The patient was instructed to wear stabilization splint at all time, and mandibular position was check every 3-4 weeks along with adjustment of the splint. Over the course of this treatment provisional restoration stayed intact, and neither washout of temporary cement nor temporomandibular disorder occurred. Determination of mandibular position by stabilization splint does not only avail accurate diagnosis, but also help realizing patient specific and stable condylar position, which greatly merited the subsequent prosthetic procedures and helped keeping mandibular position stable.