EC Dental Science

Research Article Volume 22 Issue 5 - 2023

In-Vitro Evaluation of Hardness Changes in Denture Soft Liners when Stored in Different Storage Media

Salmoli Ganguly1*, Mayank Shah1, Debdip Ganguly2, Satyaki Samanta1 and Souvik Bakshi1

1Department of Prosthodontics and Crown and Bridge, Kolhan University, India
2Department of Oral and Maxillofacial Surgery, SRM University, India

*Corresponding Author: Salmoli Ganguly, Post Graduate Trainee, Department of Prosthodontics and Crown and Bridge, Kolhan University, India.
Received: March 28, 2023; Published: April 15, 2023

Introduction: Complete dentures are a pair of acrylic plates simulating upper and lower alveolar ridges bearing a full set of maxillary and mandibular teeth that impart aesthetics to the face and rehabilitate the function of mastication for people who have lost all teeth.

Prolonged use of complete denture leads to pressure resorption of the alveolar ridges leading to denture instability. An unstable denture is incapable of even distribution of masticatory stresses leading to concentration of load at certain specific areas creating pressure points. These areas are often painful due to ulceration, inflammation or injury to oral mucosa from denture trauma.

Here comes in the role of denture reliners. Denture soft liners go a long way in enabling a dentist to ensure comfort and protection to a denture wearing patient with special needs.

Aim: To evaluate the changing hardness values of denture soft liners when stored for varying duration in different commonly available storage media.

Methodology: A total of 384 disc shaped samples of denture soft liners have been fabricated using ISO directives. These samples have been divided into groups I, II and III of 128 each, respectively made out of Mollosil (Detax, Germany), Reline Soft (GC, Japan) and Coe Soft (GC, Japan). Further, every group have been divided into subgroups A, B, C and D consisting of 32 samples each which have been stored in artificial saliva, tap water, RO water and distilled water respectively. Again 32 samples in each subgroup have been divided into batches of 8 and studied at 4 different time intervals of 32 hours post fabrication, 7 days post immersion, 30 days post immersion and 90 days post immersion in each storage medium.

Results: The data was analyzed using two way ANOVA. The mean Shore A hardness just after fabrication of the samples (Day 2) ranges between 38.4 ± 0.2 to 42.7 ± 0.4. When immersed in storage media, the values indicate increase in Shore A hardness and the minimum increase in hardness is seen in artificial saliva. The maximum increase in hardness is seen in tap water.

Conclusion: It was concluded that the hardness of GC Coe Soft showed minimum changes over time and the best material for storage according to this study is artificial saliva.

Keywords: Denture Soft Liner; Storage Media; Hardness; Plasticizers; Complete Denture; Pressure Ulcers

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Salmoli Ganguly., et al. "In-Vitro Evaluation of Hardness Changes in Denture Soft Liners when Stored in Different Storage Media". EC Dental Science 22.5 (2023): 36-55.