Effects of Occlusal Rest Design on Pressure Distribution Beneath the Denture Base of a Distal Extension Removable Partial Denture—An In Vivo Study

Suenaga, Hiroshi; Kubo, Kei; Hosokawa, Ryoichi; Kuriyagawa, Tsunemoto; Sasaki, Keiichi

doi:10.11607/ijp.3847

Cited by 17 publications

(12 citation statements)

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“…The authors explained that such results may be attributed to the fact that the loaded point moved to the thinnest portion (the most protruded point of occlusal rest base). Although minority of scientific studies are dealing with the occlusal rest biomechanical behavior, it may be, however, stated that stress distribution on the residual ridge beneath the RPD base is dependent on the occlusal rest design [17].…”

Section: Discussionmentioning

confidence: 99%

Stress and strain analyses of removable partial denture abutment tooth in relation to the position of the minor connector

et al. 2017

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Introduction/Objective For optimum loading distribution, the angle formed by the occlusal rest and the vertical minor connector from which it originates should be less than 90°. The objective of the article was to visualize the optimum angle between the occlusal rest and the minor connector in terms of intensity and distribution of occlusal loads using finite element analysis. It was the intention, concerning biomechanical behavior, to document that the optimum angle between the occlusal rest and the minor connector should be less than 90°. Methods Three different virtual models of partial edentulous Kennedy III class were created using the CATIA design computer program with different angles between the occlusal rest and the minor connector. Stress distribution after simulated occlusal loading was analyzed using the finite element method. Results Comparing the results obtained for three models, the highest stress values were seen in model 3 (the angle between the occlusal rest and the small connector is greater than 90°) whether the load is applied in the middle or at the end of the saddle. Conclusion Within limitations and on the basis of the study results, the minimum compressive stress was seen in model 1, where the angle between the occlusal rest and the minor connector was less than 90° whether the load is applied in the middle or at the end of the saddle. It is recommended that obtuse angle between the rest and the minor connector should be avoided due to potential hazardous stress concentration on abutment teeth.

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Section: Discussionmentioning

confidence: 99%

Stress and strain analyses of removable partial denture abutment tooth in relation to the position of the minor connector

et al. 2017

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“…They reported that the occlusal forces exerted on an RPD are transmitted to the abutment tooth primarily through the occlusal rest. Another study looked into the effect of long and short guide planes and plates in force transmission, and found no difference between them . However, Ahmad et al demonstrated that guiding planes offer some frictional resistance to RPD displacement.…”

Section: Discussionmentioning

confidence: 99%

“…Achieving maximum support from suitable abutment teeth is a key factor in the fabrication of RPDs . Rests are the primary RPD components incorporated and designed to provide adequate support and favorable transmission of forces to the abutment teeth . Several studies have looked at commonly used clasp assembly designs, clasp component function, number of clasps, and retention .…”

mentioning

confidence: 99%

Ring Rest Seat Design for Severely Tilted Molar Abutment Tooth: An Alternative Option

AlHelal

Kattadiyil

Jekki

2016

Journal of Prosthodontics

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A ring rest was used for a buccally inclined distal third molar, which served as an abutment for a distal extension Kennedy class II removable partial denture (RPD). This report describes in detail the ring rest design, which offers a conservative treatment option while complying with RPD principles. The design also allowed use of existing occlusal contact on the maxillary third molar without resulting in an overcontoured clasp design. Preparation technique for the rest, along with rationale for selection and design, is discussed. The need for other adjunctive treatment options was also avoided by using the inclination of the maxillary third molar, thereby providing a conservative, cost-effective, and time-efficient alternative treatment.

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“…b). These diverse patterns in Group 2 may depend on the design of RPD , shape of residual ridge , free‐end saddle length , condition of opposite dentition, occlusal condition, hours of RPD use, etc. Furthermore, there are many additional reasons to effect bone metabolism, such as diet, calcium and hydroxyapatite balance and hormones.…”

Section: Discussionmentioning

confidence: 99%

Bone metabolism induced by denture insertion in positron emission tomography

Suenaga

Chen

Yamaguchi

et al. 2015

J of Oral Rehabilitation

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18F-fluoride positron emission tomography (PET) can identify subtle functional variation prior to the major structural change detectable by X-ray. This study aims to investigate the mechanobiological bone reaction around the abutment tooth and in the residual ridge, induced by insertion of removable partial denture (RPD) within two different groups of patients: patients without denture experience (Group 1) and patients with denture experience before (Group 2), using 18F-fluoride PET imaging technique. 18F-fluoride PET/computerised tomography (CT) scan was performed to examine the bone metabolic change in mandible before and after the RPD treatment. Region of interests (ROIs) were placed in alveolar bone around abutment tooth and in residual bone beneath the RPD. Standardised uptake value (SUV), reflecting the accumulation of 18F-fluoride, was measured for each ROI. In all subjects of Group 1, SUVs after insertion were higher than before in both alveolar bone and residual bone, while there was less significant change in SUV in subjects of Group 2. This study demonstrated using longitudinal 18F-fluoride PET scans to effectively examine the bone metabolic change in mandible induced by occlusal loading after RPD insertion. Using this technique, within the six subjects in this study, it was shown that bone metabolism around abutment tooth and residual ridge increased after RPD insertion in case of first-time denture user, while there was no big change in the patient with experience of denture before. This study revealed the effectiveness of applying PET to evaluate bone metabolic activity as mechanobiological reaction.

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Effects of Occlusal Rest Design on Pressure Distribution Beneath the Denture Base of a Distal Extension Removable Partial Denture—An In Vivo Study

Cited by 17 publications

References 0 publications

Stress and strain analyses of removable partial denture abutment tooth in relation to the position of the minor connector

Stress and strain analyses of removable partial denture abutment tooth in relation to the position of the minor connector

Ring Rest Seat Design for Severely Tilted Molar Abutment Tooth: An Alternative Option

Bone metabolism induced by denture insertion in positron emission tomography

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