Overview
Allergic contact stomatitis (ACS) related to dentures is a common condition affecting denture wearers, particularly older adults. This inflammatory condition arises from an adverse reaction to materials used in dentures or microbial colonization exacerbated by poor hygiene practices. The pathophysiology involves complex interactions between denture materials, microbial biofilms, and host immune responses, often compounded by inadequate cleaning and maintenance routines. Understanding these factors is crucial for effective prevention and management of ACS, ensuring optimal oral health and patient comfort.
Pathophysiology
The development of allergic contact stomatitis in denture wearers is multifaceted, involving both microbial and material-related factors. Inadequate denture hygiene leads to the accumulation of food particles and biofilm, creating an environment conducive to opportunistic microorganisms such as Candida albicans [PMID:30365198]. C. albicans is a primary pathogen implicated in denture stomatitis, often thriving on acrylic resin surfaces due to their susceptibility to microbial adhesion [PMID:36037709]. The use of advanced materials like silver-loaded mesoporous silica nanoparticles has shown promise in enhancing antimicrobial activity, thereby reducing the risk of microbial colonization and subsequent infections [PMID:36037709].
Denture materials themselves can contribute significantly to ACS. Acrylic resins, commonly used in denture fabrication, can retain residual monomers and plasticizers that may act as allergens over time [PMID:1501194]. Studies have shown that prolonged use of dentures leads to a gradual decrease in residual monomer content, potentially reducing allergenic potential [PMID:1501194]. However, the loss of plasticizers from poly(ethyl methacrylate) polymers, observed more prominently in vivo compared to in vitro conditions, suggests another potential mechanism for allergen exposure [PMID:2022769]. These material alterations can irritate the oral mucosa, triggering allergic reactions in susceptible individuals.
Mechanical factors also play a role. Complete denture wearers often exhibit diminished chewing efficiency and altered muscle activity patterns compared to those with natural dentition [PMID:17572377]. This reduced functionality can lead to increased mucosal irritation and altered sensory perception, making patients more susceptible to irritants that might trigger ACS [PMID:10445481]. Additionally, higher surface roughness, often resulting from suboptimal cleaning methods such as chemical polishing (CP) rather than mechanical polishing (MP), facilitates greater microbial accumulation and exacerbates mucosal irritation [PMID:15525385].
Salivary changes post-denture insertion, characterized by increased flow rates, can further impact mucosal conditions [PMID:15089939]. These alterations in salivary dynamics might influence the severity and presentation of ACS over time, highlighting the importance of monitoring salivary parameters in affected patients.
Epidemiology
Allergic contact stomatitis among denture wearers predominantly affects older adults, who often exhibit suboptimal denture hygiene practices [PMID:38433293]. Insufficient cleaning routines and inadequate oral hygiene habits significantly contribute to the development of ACS, as evidenced by the high prevalence of poor denture condition observed in elderly populations—50.3% rated as good, 29.5% fair, and 20.2% poor [PMID:24858768]. These statistics underscore the critical need for education on proper denture care.
Denture adhesive usage patterns also provide insights into patient management challenges. Despite potential benefits, only a small fraction (6.9%) of surveyed edentulous patients currently use denture adhesives, with a majority (67.1%) never having tried them [PMID:10666972]. This reluctance may stem from improper fit or discomfort, both of which can exacerbate conditions like ACS. Understanding these usage patterns is essential for tailoring patient education and intervention strategies.
Clinical Presentation
The clinical presentation of allergic contact stomatitis in denture wearers often manifests through a combination of mucosal irritation and systemic signs. Poor denture hygiene not only leads to conditions like gum disease and halitosis but also directly contributes to the inflammatory symptoms characteristic of ACS [PMID:30365198]. Patients may report localized pain, erythema, edema, and ulcerations around the denture margins, indicative of chronic irritation and potential allergic reactions [PMID:37624691].
Material-specific issues further complicate clinical presentations. Certain denture materials, such as those exhibiting unacceptable color changes and increased roughness post-cleaning, can intensify irritation and allergic responses [PMID:37624691]. Evaluating overall patient satisfaction, particularly regarding denture retention, stability, and comfort, is crucial for identifying underlying causes of discomfort that may lead to ACS [PMID:32491236]. Variations in denture liner hardness over time, influenced by storage conditions and material composition, can also affect clinical symptoms, necessitating regular assessments [PMID:30093127].
Altered salivary flow rates, as noted in studies, can influence symptom severity and progression, emphasizing the need for longitudinal monitoring of these parameters [PMID:15089939]. Additionally, the sensory alterations due to extensive denture coverage can make patients less aware of irritants, potentially delaying diagnosis and treatment of ACS [PMID:10445481].
Diagnosis
Diagnosing allergic contact stomatitis in denture wearers involves a comprehensive clinical evaluation complemented by specific diagnostic tests. Clinicians should first assess the patient's denture hygiene practices, noting any irregular cleaning habits that could predispose to microbial overgrowth and material-related irritation [PMID:24858768]. Visual inspection of the dentures for signs of wear, roughness, and biofilm accumulation is essential. Mucosal examination should focus on identifying characteristic lesions such as erythema, ulcerations, and edema around the denture borders.
Patch testing remains a cornerstone in identifying specific allergens contributing to ACS. This method helps differentiate between contact allergies and other inflammatory conditions [PMID:32491236]. Additionally, microbial cultures, particularly targeting Candida albicans, can confirm the presence of pathogenic biofilms contributing to the stomatitis [PMID:30365198]. Salivary analysis for flow rates and composition can provide further insights into mucosal health and potential triggers [PMID:15089939].
Management
Effective management of allergic contact stomatitis in denture wearers hinges on multifaceted approaches, emphasizing improved hygiene, material selection, and patient education. Raising awareness about proper denture cleaning practices is paramount [PMID:38433293]. Clinicians should recommend thorough daily cleaning with appropriate denture cleansers, such as those containing sodium hypochlorite or effervescent tablets, which can mitigate surface roughness and color changes [PMID:37624691]. The use of experimental denture wipes, composed of nonwoven materials with cleaning emulsions, offers a promising alternative for maintaining hygiene, especially when conventional methods are challenging [PMID:30365198].
Material selection plays a critical role. Dentures fabricated using advanced techniques like Digital Light Processing (DLP) and Injection Molding (IM) exhibit superior surface adaptation, reducing mechanical irritation [PMID:36495146]. CAD-CAM technology not only enhances retention and comfort but also improves overall patient satisfaction, potentially mitigating ACS [PMID:34332774]. Incorporating antimicrobial agents, such as silver-loaded mesoporous silica nanoparticles, into denture materials can significantly reduce Candida biofilm formation, offering a proactive approach to preventing stomatitis [PMID:36037709].
For patients already experiencing ACS, modifying denture liners and materials can be beneficial. Silicone liners, while initially soft, may increase in hardness over time when exposed to artificial saliva, necessitating regular assessments [PMID:26548875]. Clinicians should also consider the impact of denture adhesives, noting that while they can improve masticatory performance, improper fit or continued discomfort may necessitate reevaluation [PMID:10666972].
Incorporating natural compounds with antimicrobial properties, such as thymoquinone added to PMMA denture bases, can enhance antifungal benefits without compromising material integrity [PMID:30178899]. However, clinicians must monitor for any changes in surface roughness and hardness that could affect patient comfort and mucosal health [PMID:30093127].
Complications
Neglecting proper denture hygiene can lead to more severe complications beyond ACS, including systemic infections. Plaque accumulation and microbial overgrowth not only exacerbate local inflammation but also pose risks of systemic spread, particularly in immunocompromised individuals [PMID:38433293]. Poorly fitting dentures, often resulting from suboptimal fabrication techniques like LCD and compression molding, can cause mechanical irritation and exacerbate conditions like ACS [PMID:36495146].
Material degradation due to prolonged use and improper cleaning can introduce additional risks. Solutions like Corega and Renew, while effective in some aspects, can increase surface roughness and reduce flexural strength, potentially worsening symptoms in patients with ACS [PMID:28598590]. Differences in water sorption between materials such as UDMA and PMMA can affect long-term biocompatibility and durability, influencing the overall risk profile for complications [PMID:28874639].
Key Recommendations
These recommendations aim to mitigate the risk factors associated with allergic contact stomatitis, promoting better oral health and quality of life for denture wearers.
References
1 Algabri R, Alqutaibi AY, Altayyar S, Mohammed A, Khoshafa G, Alryashi E et al.. Behaviors, hygiene habits, and sources of care among removable complete and partial dentures wearers: A multicenter cross-sectional study. Clinical and experimental dental research 2024. link 2 Axe A, Burnett GR, Milleman KR, Patil A, Milleman JL. Randomized Controlled Clinical Study to Determine the Oral and Dermal Tolerability of an Experimental Denture Wipe. Journal of prosthodontics : official journal of the American College of Prosthodontists 2019. link 3 Çakmak G, Hess JA, Dönmez MB, Yılmaz D, Alhotan A, Schimmel M et al.. Effect of polishing and denture cleansers on the surface roughness of new-generation denture base materials and their color change after cleansing. Journal of prosthodontics : official journal of the American College of Prosthodontists 2024. link 4 Tosun ON, Bilmenoglu C, Özdemir AK. Comparison of denture base adaptation between additive and conventional fabrication techniques. Journal of prosthodontics : official journal of the American College of Prosthodontists 2023. link 5 Chappuis Chocano AP, Venante HS, Bringel da Costa RM, Pordeus MD, Santiago Junior JF, Porto VC. Evaluation of the clinical performance of dentures manufactured by computer-aided technology and conventional techniques: A systematic review. The Journal of prosthetic dentistry 2023. link 6 Aati S, Aneja S, Kassar M, Leung R, Nguyen A, Tran S et al.. Silver-loaded mesoporous silica nanoparticles enhanced the mechanical and antimicrobial properties of 3D printed denture base resin. Journal of the mechanical behavior of biomedical materials 2022. link 7 Macêdo LO, Campos DES, da Nóbrega Alves D, Carreiro ADFP, de Castro RD, Batista AUD. Effects of long-term cinnamaldehyde immersion on the surface roughness and color of heat-polymerized denture base resin. The Journal of prosthetic dentistry 2022. link 8 Florêncio Costa RT, Leite Vila-Nova TE, Barbosa de França AJ, Gustavo da Silva Casado B, de Souza Leão R, Dantas de Moraes SL. Masticatory performance of denture wearers with the use of denture adhesives: A systematic review. The Journal of prosthetic dentistry 2022. link 9 de Souza RF, Ribeiro AB, Oates TW, Feine JS. The McGill Denture Satisfaction Questionnaire revisited: Exploratory factor analysis of a binational sample. Gerodontology 2020. link 10 Gad MM, Al-Thobity AM, Fouda SM, Näpänkangas R, Raustia A. Flexural and Surface Properties of PMMA Denture Base Material Modified with Thymoquinone as an Antifungal Agent. Journal of prosthodontics : official journal of the American College of Prosthodontists 2020. link 11 Nowakowska-Toporowska A, Malecka K, Raszewski Z, Wieckiewicz W. Changes in hardness of addition-polymerizing silicone-resilient denture liners after storage in artificial saliva. The Journal of prosthetic dentistry 2019. link 12 Al-Thobity AM, Gad M, ArRejaie A, Alnassar T, Al-Khalifa KS. Impact of Denture Cleansing Solution Immersion on Some Properties of Different Denture Base Materials: An In Vitro Study. Journal of prosthodontics : official journal of the American College of Prosthodontists 2019. link 13 Shetty P, Chhapdia L, Verma P, Sahu A, Kushwaha NS, Chaturvedi R et al.. Comparative Analysis of the Water Sorption and Cytotoxicity of Two different Denture Base Systems: An in vitro Study. The journal of contemporary dental practice 2017. link 14 Nowakowska-Toporowska A, Raszewski Z, Wieckiewicz W. Color change of soft silicone relining materials after storage in artificial saliva. The Journal of prosthetic dentistry 2016. link 15 Apratim A, Shah SS, Sinha M, Agrawal M, Chhaparia N, Abubakkar A. Denture hygiene habits among elderly patients wearing complete dentures. The journal of contemporary dental practice 2013. link 16 Meşe A. Effect of denture cleansers on the hardness of heat- or auto-cured acrylic- or silicone-based soft denture liners. American journal of dentistry 2007. link 17 Murray CA, Boyd PT, Young BC, Dhar S, Dickson M, Currie JN. A survey of denture identification marking within the United Kingdom. British dental journal 2007. link 18 Veyrune JL, Lassauzay C, Nicolas E, Peyron MA, Woda A. Mastication of model products in complete denture wearers. Archives of oral biology 2007. link 19 Rahal JS, Mesquita MF, Henriques GE, Nóbilo MA. Surface roughness of acrylic resins submitted to mechanical and chemical polishing. Journal of oral rehabilitation 2004. link 20 Wolff A, Ofer S, Raviv M, Helft M, Cardash HS. The flow rate of whole and submandibular/sublingual gland saliva in patients receiving replacement complete dentures. Journal of oral rehabilitation 2004. link 21 Coates AJ. Usage of denture adhesives. Journal of dentistry 2000. link00046-9) 22 Inoue K, Fujii K, Kanie T, Kadokawa A, Tsukada G. An evaluation of acrylic complete dentures using the discrimination of elastic bodies or viscous fluids. Journal of oral rehabilitation 1999. link 23 Sadamori S, Kotani H, Hamada T. The usage period of dentures and their residual monomer contents. The Journal of prosthetic dentistry 1992. link90349-f) 24 Graham BS, Jones DW, Sutow EJ. An in vivo and in vitro study of the loss of plasticizer from soft polymer-gel materials. Journal of dental research 1991. link 25 Kapur KK, Garrett NR. Studies of biologic parameters for denture design. Part II: Comparison of masseter muscle activity, masticatory performance, and salivary secretion rates between denture and natural dentition groups. The Journal of prosthetic dentistry 1984. link90456-6)
25 papers cited of 55 indexed.