## 1 Introduction  
The design of a single crown restoration should be in a functionally and anatomically harmonic relationship with the adjacent and antagonistic teeth [1; 2; 3; 4; 5]. The occlusal surface of a single crown should offer functional stability in maximum intercuspation (MICP) and no interference during eccentric movements [6]. Conventional single-crown restorations are designed and adjusted in a dental laboratory using various mechanical articulators, which are used for harmonious occlusal relationships [7]. Conventional mechanical articulators have long been successfully and effectively used for diagnostic and therapeutic treatments in dentistry [8; 9; 10; 11]. Using a conventional articulator, it is possible to reproduce the anatomical relationship and simulate mandibular movement in an extraoral condition [12]. Therefore, this mechanical device is a valuable and practical tool for various treatments that are available from the fabrication of simple restoration to complex oral rehabilitation [8; 13]. However, conventional articulators mainly focus on reproducing the mechanical maxilla-mandible relationship rather than reconstructing the mandibular functional movement [14]. Even a fully adjustable articulator cannot exactly duplicate functional mandibular movement [15]; the design of fully functional occlusion through conventional methods is not possible. The traditional solution to this problem is a clinical occlusal adjustment for harmonious occlusion, which corresponds to an individual's functional movement [7]. For a more accurate reconstruction of the occlusal pathway, the functional generated pathway (FGP) technique was introduced by [PERSON] et al. [16]. This technique includes recording the actual occlusal path during functional movement in the patient's mouth where a recording medium is placed between arches. The clinical usefulness of this technique for fixed partial dentures was established [17; 18; 19]. However, the limitation of this technique is that the clinical procedure is complicated and additional laboratory work is required. In addition, it is controversial whether the recording material decreases the accuracy of the occlusal grid in which the accumulated occlusal movement is recorded [19]. In recent years, digital dental technology, such as computer-aided design (CAD) software and scanning equipment, has been widely used in dentistry to increase accuracy and reduce patient in-chair time [20]. The advance of intraoral scanners (IOSs) and CAD software has made virtual design workflow possible without conventional impression-taking and wax-up procedures [21]. However, the current digital workflow for occlusal design is based on static occlusion [22; 23; 24]. Although a virtual articulator module can be utilized for the refinement of occlusal design, because the fundamental mechanism between a virtual articulator and a mechanical articulator is similar, a complete reproduction of mandibular functional movement is not possible [25]. Therefore, time-consuming clinical adjustment is still required to remove interference caused by an incomplete occlusal reproduction [6]. Recently, new methods based on mandibular motion tracking using optical devices have been introduced for integrating individual functional movement into occlusal morphology. The Patient Specific Motion (PSM, 3 Shape A/S, Copenhagen, Denmark) is a markerless mandibular motion tracking system that is used through an IOS. The PSM provides the patient's own dynamic occlusion recording during eccentric movement. A consecutive accumulated dataset of mandibular movement is recorded in the patient's mouth using an IOS. The recorded digital dataset is used to not only visualize the mandibular movement but also adjust the potential occlusal errors in the occlusal design in CAD software. In this way, the PSM can reduce occlusal interference in the eccentric movement by reproducing the functional mandibular movement in CAD software.