title: Evaluation of the Alteration of Occlusal Distribution in Unilateral Free-End and Intermediate Missing Cases.
abstract: The present study aimed to evaluate the effect of implant prostheses on the occlusal force and area as well as the distribution of occlusal loading in unilateral free-end and intermediate missing cases. Fourteen healthy subjects (7 free-end missing cases in the first and second molars and 7 intermediate missing cases in the first molar region) were included. Six months after the implant prosthesis was placed, an occlusal evaluation was performed with or without the implant superstructure by using Dental Prescale film and an occluder device. In free-end missing cases, the total occlusal force and area, implant-side occlusal force and area, and implant-side occlusal force and area of the residual natural teeth were significantly affected by the implant prostheses. In intermediate missing cases, the implant-side occlusal force of the residual natural teeth was significantly affected by the implant prostheses. In free-end missing cases, the proportions of implant-side occlusal force, non-implant-side occlusal force, and implant-side occlusal force of the residual natural teeth relative to the total occlusal force were significantly affected by the implant prostheses. In the intermediate missing cases, the proportion of the implant-side occlusal force of the residual natural teeth relative to the total occlusal force was significantly affected by the implant prostheses. The proportion of the occlusal area was also significantly affected. In free-end missing cases, implant prostheses significantly increased the occlusal force and area, which resulted in the proper occlusal distribution. In intermediate missing cases, an implant prosthesis may only improve the same-side occlusal loading of the natural teeth.
authors.affiliation: 1   Department of Oral Implantology and Regenerative Dental Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Kon
authors.affiliation: 1   Department of Oral Implantology and Regenerative Dental Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Shiota
authors.affiliation: 2   Department of Dentistry, Oral and Maxillofacial Surgery, Jichi Medical University, Shimotsuke, Japan.
authors.forename: Aoi
authors.initials: A
authors.lastname: Sakuyama
authors.affiliation: 1   Department of Oral Implantology and Regenerative Dental Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Maho
authors.initials: M
authors.lastname: Ozeki
authors.affiliation: 1   Department of Oral Implantology and Regenerative Dental Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Wataru
authors.initials: W
authors.lastname: Kozuma
authors.affiliation: 1   Department of Oral Implantology and Regenerative Dental Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Sawako
authors.initials: S
authors.lastname: Kawakami
authors.affiliation: 1   Department of Oral Implantology and Regenerative Dental Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Shohei
authors.initials: S
authors.lastname: Kasugai
mesh_terms: D001732:Bite Force; D015921:Dental Implants; D019094:Dental Prosthesis, Implant-Supported; D008963:Molar; D014070:Tooth
chemical_list: D015921:Dental Implants
keywords: dental implant; implant prosthesis; occlusal force