Publications by authors named "Toshikazu Iijima"
Background: Oral hypofunction is the stage before oral dysfunction. The subjective symptoms of poor oral function and the decline in oral health-related quality of life (OHRQoL) that occur in the oral hypofunction stage can be missed.
Objective: This multicentre cross-sectional study was performed to examine the relationships between the test results for oral hypofunction, subjective frailty symptoms and OHRQoL of outpatients in dental clinics.
Article Synopsis
- - This study analyzed the impact of different dental prosthetic methods on patients with Kennedy Class I partial edentulism, focusing on aspects like oral function, frailty symptoms, and quality of life.
- - 348 patients were divided into three groups: those with natural teeth (NT), those using removable partial dentures (RPD), and those with implant-supported fixed prostheses (ISFP), and their oral health was evaluated through various tests and questionnaires.
- - Results indicated that the RPD group experienced poorer oral hygiene, reduced chewing ability, and higher rates of frailty symptoms compared to the ISFP group, suggesting that the type of prosthetic method significantly influences patients' oral health outcomes.
Owing to the satisfactory esthetic and functional outcomes of implant surgery for the anterior teeth, some dentists consider it the gold standard treatment. However, the risk of developing peri-implantitis is positively associated with the long-term use of the implant. This necessitates the development of an implant design that reduces the risk of peri-implantitis, especially considering the long-term use of implants in young patients.
View Article and Find Full Text PDFStatement Of Problem: The buccal bone in an edentulous maxilla loses thickness over time because of physiological changes. However, the dimensional changes of the buccal bone in an edentulous maxilla with an implant-supported fixed dental prosthesis are unknown.
Purpose: The purpose of this retrospective clinical study was to evaluate cone beam computed tomography (CBCT) images of the dimensional changes of the buccal bone in edentulous maxillae with complete arch telescopic-retained implant-supported fixed dental prostheses (CTI-FDPs) after 6 years by using a professional retrieval system.
Article Synopsis
- The study compared two types of dental prostheses: full-arch screw-retained (FSI-FDPs) and full-arch telescopic-retained (FTI-FDPs) implants, focusing on marginal bone loss (MBL) and peri-implantitis over 7-13 years.
- The results showed that both prostheses had similar average MBL, but a higher percentage of FSI-FDPs experienced significant MBL (≥1 mm) compared to FTI-FDPs, which had a lower risk.
- Additionally, both types showed comparable rates of peri-implantitis, indicating similar long-term outcomes regarding gum health around the implants.
Background: The longitudinal clinical outcomes over decades contribute to know potential factors leading to implant failure or complications and help in the decision of treatment alternatives.
Methods: The cases of all patients who received dental implants treated with titanium plasma-sprayed surfaces and whose prostheses were set in the period 1984-1990 at seven private practices were retrospectively analyzed. The cumulative survival rate, the cumulative incidence of peri-implantitis, and the complication-free prosthesis rate were calculated with Kaplan-Meier survival curves, and the factors' influence on implant survival rate and the incidence of peri-implantitis were determined by a single factor in univariate analyses and multivariate analyses.