INTRODUCTION
Background
Research question
Objectives of the study
Scope of the study
- Independent variables
- Dependent variables
- Controlled variables
Research hypothesis
Definitions of terms
- Denture adhesive
- Glue type denture adhesive
- Liner type denture adhesive
- Retention of dentures
- Retention force
Significances of the study
LITERATURE REVIEW
Complete denture retention and stability in the oral cavity is affected by a number of variables and intricate interactions, including exact peripheral extensions of the denture base (determined by physiological movements), atmospheric pressure, and the presence of a thin saliva film (with acceptable viscosity ) between the denture and the tissues underneath the base of the denture. Saliva increases the viscosity of the adhesive, increases the strength required to separate the prosthesis from the tissue surface, and changes the properties of current adhesives, which are influenced by a combination of physical and chemical factors(22). It maintains adhesive properties for 8-12 hours, does not change the occlusion of the prostheses and is free from bacterial and fungal growth(1).
Apply three to four increments of denture cream to the palatal of the maxillary denture midline, posterior border and anterior ridge(1). The overall use of denture adhesives is increasing with the aging of the world population and the rise of edentulous people. Retention was one of the most important requirements of both removable partial dentures and complete dentures.
Other phrases that can be used to describe the retention of the denture include peak load-to-displacement and maximum tensile load(21), adhesion force(5), or retention force(20). To measure the adhesive strength of the denture, a retention was set up in the laboratory. The most decisive tool for determining the retention power of denture adhesive has been a universal testing machine and associated software(32).
In several denture adhesive studies, the ultimate vertical tensile strength was evaluated using a universal testing machine, which was considered the gold standard. This study was conducted using a universal testing machine to evaluate the retention of denture adhesive. They compared their study with literature estimates and assumed that a retention of about 20 N is adequate for a prosthesis (46).
They discovered a significant improvement in patients' articulation after application of the denture adhesives, both perceptually and acoustically, with the Fixodent denture adhesive providing the highest values. High-profile attachments (rod and clip attachments) and low-profile attachments (ball attachments, cap attachments, and magnetic attachments), including the Locator attachment and the Locator R-Tx attachment(20), were recommended for retention in several previous attachment studies. According to this study, the initial and terminal retention of Locator R-Tx® and Locator® after a fatigue test of 5,400 cycles did not differ significantly from each other.
RESEARCH METHODOLOGY
- Materials preparation
- Study design and method
- Sample size
- Data collection
- Statistical analysis
Surface roughness (Ra) tested from all cylindrically ground acrylic resins and sample holders with non-contact surface roughness tester. Cylinder-shaped attached PMMA with pressure-sensitive spindle bearing screw with self-curing pink acrylic resin. Use a grade 2 denture adhesive to slightly fill the sample holder hole, flatten the surface with a spatula in a circular spiral motion, and then immerse the sample/sample holder assembly in ml of water for 1 minute in a water bath held at C.
Remove the sample/sample holder assembly and shake it once to remove any water that may have collected on the surface. Secure the specimen holder in place with two c-clamps, then apply load to the center of the specimen. Move the pressure-sensitive shaft down at a crosshead speed of 5 mm/min and apply a load to the sample up to N.
Hold the load in place for 30 seconds, then pull it in the opposite direction at a cross speed of 5 mm/min. Recording the maximum force sensed by the pressure-sensitive shaft and calculating the adhesion strength as force per unit area. In this investigation, we found a significant difference in the statistical power of the test in 80 subjects (10 subjects per group) (G*Power 3.1.9.6; Department of Psychology, Christian-Albrechts University, Kiel, Germany).
Pearson correlation tests were used to find relationships between the surface roughness of milled acrylic resins and the retention strength of denture adhesives.
RESULT
In addition, Table 8 showed mean retention strengths and 95% confidence intervals for means with statistical summaries of denture adhesive groups. In addition, the retention strength per 1 THB (kPa/THB) of each denture adhesive group shown in Table 9. The retention strength of Fixodent groups (FxO, FxM, FxMH, FxBH and FxFS) was not significantly different.
The results of Least Significance Difference (LSD) post hoc comparisons are displayed as identical symbols, and the same identical symbols were not significantly different (P > 0.05). Results of least significant difference (LSD) post hoc comparisons are shown as superscript letters, and values with the same superscript letters were not significantly different (P > 0.05). The results of Least Significance Difference (LSD) post hoc comparisons are displayed as identical symbols, and the same identical symbols.
SUMMARY DISCUSSION AND SUGGESTION
Over time, the addition of calcium salts and zinc has increased the effect of the active components (67). The result of this study will be used to update the retention strength of denture adhesives available in Thailand, which can be used as a clinical guideline for Thai people. A study to evaluate the retention capacity of different adhesive materials for dentures: an in vitro study.
An investigation of the effect of denture adhesives on the incisal bite force of full denture wearers using pressure transducers - a clinical study. Evaluation of denture retention and ease of removal of the oral mucosa on a new gel-like denture adhesive. A comparative analysis of the effect of three types of denture adhesives on the retention of maxillary denture bases: an in vivo study.
Investigation of the effect of three types of denture adhesives on the retention of an ill-fitting full maxillary prosthesis (clinical study). Comparison of the effect of three denture adhesives on the retention of a full mandibular prosthesis for diabetic patients (randomized clinical trial). The effectiveness of adhesives on the retention of free end partial dentures of the mandible: an in vitro study.
Continuous reduction of residual alveolar ridges in complete denture wearers: A mixed-longitudinal study covering 25 years. Evaluation of the physical properties of a newly developed denture adhesive for patients with dry mouth. Retention of prefabricated abutments for implant-stabilized overdentures in the edentulous mandible: An in vitro study.
Investigating the reduction of restraining force and wear of the locating link system with different implant cancellations. A comparative analysis of retention of mandibular denture bases in patients with resorbed ridges with or without sublingual extension - an in vivo study. Effect of abutment angulation on retention and stability of three overdenture attachment systems: An in vitro study.
The in vitro comparison of the retention of an implant-supported stud fixation localization and straumann ball fixation at different angles. Effects of denture adhesive on the retention of milled and heat-activated maxillary denture bases: A clinical study.
