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Abstract
ABSTRACT
Introduction. Removable partial dentures (RPDs) are an essential and economically viable solution for oral rehabilitation, particularly in resource-limited settings. However, their failure rate remains high due to multiple technical and clinical factors. In Cameroon, and specifically in Bafoussam, no data exists to document the precise causes of these failures, which are crucial for improving practices and patient satisfaction. This study aimed to evaluate the technical and clinical causes of RPD failures among patients in Bafoussam. Methodology. A descriptive cross-sectional study was conducted over a 20-month period (March 2022 to November 2023) in dental practices in Bafoussam. Consecutive non-probability sampling was used to include 32 patients with defective RPDs. Data was collected via a questionnaire and clinical evaluation, then analyzed with non-parametric tests (significance threshold p≤0.05). Results. The mean age of participants was 44.5 years (±12.3), with a male predominance (69%, n=22). Aesthetic failures were common, with 47.6% (n=10) of acrylic resin users reporting shade mismatch. Functional problems predominated, with 76.2% (n=16) of patients citing phonatory disorders (dysphonia). The technical process was found to be deficient: only 18.8% (n=5) of practitioners used a secondary impression with elastomeric materials, and critical evaluation steps (Wax Occlusion Rims trial / Wax Try-in, Insertion & Master Cast) were performed by only 18.8% (n=6) of dentists. Conclusion. This study identifies significant technical shortcomings in the fabrication and control of RPDs in Bafoussam, primarily the lack of precise impressions and the omission of occlusal evaluations. Continuous training of practitioners in standardized protocols and improved access to quality materials are imperative to optimize the longevity and function of dentures and improve patient satisfaction.
RÉSUMÉ
Introduction. Les prothèses partielles amovibles (PPA) représentent une solution essentielle et économiquement accessible pour la réhabilitation buccale, particulièrement dans les contextes à ressources limitées. Cependant, leur taux d'échec reste élevé en raison de multiples facteurs techniques et cliniques. Au Cameroun, et spécifiquement à Bafoussam, aucune donnée n'existe pour documenter les causes précises de ces échecs, pourtant cruciales pour améliorer les pratiques et la satisfaction des patients. Cette étude visait à évaluer les causes techniques et cliniques des défaillances des PPA chez les patients porteurs à Bafoussam. Méthodologie. Une étude transversale descriptive a été menée sur une période de 20 mois (mars 2022 à novembre 2023) au sein de cabinets dentaires de Bafoussam. Un échantillonnage non probabiliste consécutif a été utilisé pour inclure 32 patients présentant des PPA défectueuses. Les données ont été recueillies via un questionnaire et une évaluation clinique, puis analysées avec des tests non paramétriques (seuil de significativité p≤0,05). Résultats. L'âge moyen des participants était de 44,5 ans (±12,3), avec une prédominance masculine (69%, n=22). Les défaillances esthétiques étaient fréquentes, 47,6% (n=10) des utilisateurs de résine acrylique rapportant une inadéquation de teinte. Les problèmes fonctionnels prédominaient, 76,2% (n=16) des patients évoquant des troubles phonatoires (dysphonie). Le processus technique s'est avéré déficient : seuls 18,8% (n=5) des praticiens ont recouru à une empreinte secondaire avec des matériaux élastomères, et les étapes critiques d'évaluation (VOD/VRD, IMR) n'ont été réalisées que par 18,8% (n=6) des dentistes. Conclusion. Cette étude identifie des lacunes techniques importantes dans la fabrication et le contrôle des PPA à Bafoussam, principalement l'absence d'empreintes précises et le défaut d'évaluations occlusales. La formation continue des praticiens aux protocoles standardisés et l'amélioration de l'accès à des matériaux de qualité sont impératifs pour optimiser la longévité et la fonction des prothèses et améliorer la satisfaction des patients.
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References
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References
1. Plinio Mendes Senna, Carlos Fernando Mourão, Carlos Roberto Teixeira Rodrigues, Laila Zarranz, Mônica Zacharias Jorge, Tea Romasco et al. Clinical assessment of flexible and non-metal clasp dentures: a systematic review. Prosthesis : 2025 ;7(4),91.
2. Sara Tarek Ahmed. Three-dimensional printing and metal framework for designing removable partial dentures - A narrative review. Saudi Journal of Oral Sciences : 2025 ;12(2),117-22.
3. Shiwei Song, Nan Ren, Fenglan Li, Shizhu Bai. Fully digital workflow for duplicating clasp-retained removable partial dentures using three-dimensional printing: A clinical report. The Journal of Prosthetic Dentistry : 2025 ; 133(5),1118-21.
4. Francine Kagiza Angela da Costa, Guilherme Fantini Ferreira, Renata Blumer, Marcelo Corrêa Alves, Alexandre Rodrigues Freire, Renata Cunha Matheus Rodrigues Garcia. Comparative analysis of retentive areas of removable partial denture abutment teeth obtained by digital and conventional survey techniques.Journal of Prosthetic Dentistry, 2025; 43.
5. Guilherme Fantini Ferreira, Nadine Zumsteen, Lorena Tavares Gama, Renata Cunha Mateus Rodrigues Garcia. Planning and RPD mouth preparation by Brazilian dentists in digital dentistry scenario. Brazilian Journal of Oral Sciences : 2025 ; pages e255628.
6. Khady Badji, Pi Kamara, Kane FB, Cissé B, Dabo PS, Thioune N, Mbodj EB. Evaluation of the survival rate of removable partial supra-implant prostheses: a review of the literature from 2011 to 2021. Rev. Int. Coll; Odonto6Stomatol. Afr Chir. Maxillo-Fac : 2023, 25-30.
7. Sola-Ruiz, Raquel Leon, Carlos Labaig, Eduardo Selva, Augustin-Paradero. Clinical outcomes of veneered zirconia anterior partial fixed dental prostheses : A 12- year prospective clinical trial. The journal of prosthetic dentistry : 2022, 127 (6) ;846-51.
8. Yotat Michèle Lolita, Agbor Ashu Michael, Ntumba Hubert, Djachechi Florence, Bolenge Jacques. Oral health status of the elderly at Tonga, West Region, Cameroon. International journal of dentistry : 2015 (1), 820416.
9. Maria Bolat, Bosicenu Dan Nicolae, Elena Baciu, Doriana Forna, Dana Bosiceanu, Norina Forna. Partial dentures—successes and failures. Romanian Journal of Oral Rehabilitation : 2017, 9(4) ; 93-6.
10. Hakima Houari, Abdelwaheb Cheham, Soumia Boumedienne, Fatima Houari, Leila Makrelouf. Causes of instability of the mandibular total denture. International Dental Journal: 2024,74 (1); 362-3.
11. Balquees-Almufleh, Alexia Arellanob, Faleh Tamimi. Patient-reported outcomes and framework fit accuracy of removable partial dentures fabricated using digital techniques : systematic review and meta-analysis. Journal of prosthodontics : 2024, 33(7) ; 626
