title: Geometric design method for occlusal outlines of complex class I and class II inlay cavities.
abstract: The purpose of this study was to establish a geometric design method for the occlusal outlines of complex inlay cavities as a continuation study of a previous design method for simple class I inlay cavity. A method for extending the occlusal outline to the buccal or lingual groove and to three preparation types of the proximal portions of class II inlay cavities -namely, straight line preparation, sweeping curve preparation, and reverse curve preparation- was investigated. To ensure the smoothness of the occlusal outline, a Bézier curve was introduced in the design. A minimal number of control points for the curve was applied to define each preparation type. The design method was experimentally applied to mandibular and maxillary first molars. Smooth outlines of the complex inlay cavities in the molars with tool accessibility throughout the cavities were achievable by using the present method.
authors.affiliation: Division of Dental Biomaterials, Tohoku University Graduate School of Dentistry, 4-1 Seiryomachi, Aoba-ku, Sendai, Miyagi 980-8575, Japan. kikuchi@m.tohoku.ac.jp
authors.forename: Masafumi
authors.initials: M
authors.lastname: Kikuchi
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Takahashi
authors.forename: Yukyo
authors.initials: Y
authors.lastname: Takada
mesh_terms: D000465:Algorithms; D017076:Computer-Aided Design; D003722:Dental Alloys / Q000737:chemistry; D003737:Dental Cavity Preparation / Q000145:classification*; D003743:Dental Enamel / Q000033:anatomy & histology; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D006801:Humans; D007284:Inlays / Q000145:classification*; D008963:Molar / Q000033:anatomy & histology; D012984:Software
chemical_list: D003722:Dental Alloys; D003776:Dental Porcelain