Impact of the Removable Partial Denture Components on the Prognosis of the Abutment Teeth: An Exploratory Clinical Study
Bibliographic record
Abstract
Introduction Partial edentulism is considered one of the challenging topics in dentistry. The main objectives of the patient are to restore function and esthetics. However, the dentist’s main goals are preserving the remaining teeth supporting structures and restoring the patient’s quality of life. A Removable Partial Denture (RPD) design should be considered carefully for each case, as there are clinical and personal variables for each patient that will impact the prognosis of the denture. With the growing need for RPD, design principles require more research to improve the preservation of abutment teeth. This study aims to clinically evaluate the abutment teeth and supporting tissues before and after RPD placement and to correlate these clinical findings with the RPD components. Methods: Patients were recruited from the dental clinic at Schulich Dentistry, Western University in London, Ontario, Canada. Abutment teeth were evaluated for the following clinical parameters: Tooth Mobility (TM), caries, defective restorations, tooth fracture, Probing Depth (PD), Gingival Recession (GR), bleeding on probing (BOP) and Plaque Index (PI). These clinical measurements were collected at the time of RPD insertion and at least two years after. Clinical parameters were analyzed using Kruskal Wallis H, Mann-Whitney U and Chi-Squared tests. Results: 34 participants were recruited, and 40 cast metal RPDs were evaluated. The mean age of participants was 73.8 years, and the mean duration of denture use was 37.6 months. Most frameworks assessed were Kennedy Class III RPDs. Caries were significantly associated with rest type, wherein occlusal rests showed an increased incidence of caries compared to cingulum rests. The retentive clasp arm type was associated with a mean difference in PD, wherein cast circumferential and wrought wire clasp arms had deeper PD after RPD insertion than Infra gingival clasps (I-bars). Conclusion: The results of this study suggest clasp arms and occlusal rests influence dental disease. Larger samples and more clinical studies are needed to confirm the role of specific RPD components on the abutment teeth prognosis.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".