ABSTRACT
Microwaveable acrylic denture resins are believed to provide an effective means of repairing fractured dentures. This in vitro investigation compared the bond strength of a microwaveable acrylic resin as a denture repair material to two established auto-polymerized resins. Fifty-one specimens were made using Lucitone 199 as a simulated denture base, and were then divided into three groups of 17 samples each. Each test group was bonded with the following acrylic resins: Acron Mc, Rapid Repair and Palapress. A shear bond strength test was carried out 24 h after the samples were bonded. Fracture analysis showed that bond failure was adhesive for all groups. Shear bond values showed a statistically significant difference at P < 0.05 level between Acron Mc and Rapid Repair; Palapress and Rapid Repair, and indicated that Acron Mc and Palapress were superior to Rapid Repair as a repair material. However, there was no statistical difference found between Acron Mc and Palapress. Microwaveable acrylic resins produce repaired junctions of adequate strength.
Subject(s)
Dental Bonding , Denture Repair , Resin Cements , Acrylic Resins , Materials Testing , Microwaves , Stress, MechanicalABSTRACT
Dentures are routinely removed from the oral cavity before general anesthetic procedures. They are only reinserted much later when the patient returns to the room. This clinical report describes an edentulous patient who developed acute tongue swelling from venous congestion as a result of tongue recovery from general anesthesia. Her complete dentures were used to separate the residual ridges during the recovery period and relieved the congestion. Denture insertion increased the height and volume of the oral cavity, which reduced pressure on the tongue, preventing a cycle of tongue compression, congestion, and swelling. This unusual complication suggests that it may be prudent for the edentulous patient to be accompanied by their dentures in the perioperative period.
Subject(s)
Anesthesia, General , Edema/etiology , Postoperative Complications , Tongue Diseases/etiology , Airway Obstruction/prevention & control , Anesthesia Recovery Period , Denture, Complete , Edema/therapy , Female , Humans , Middle Aged , Mouth, Edentulous/complications , Mouth, Edentulous/rehabilitation , Tongue/blood supply , Tongue Diseases/therapy , Venous Insufficiency/complications , Vertical DimensionABSTRACT
The purpose of this article is to report on the use of a neodymium-iron-boron magnet enclosed in a laser-welded stainless steel casing as a viable method of retention for removable partial dentures. This mode of retention dispenses with unsightly clasps, at the same time providing direct tooth support via the overdenture abutment. Magnetic attachments are simpler to incorporate into the prosthesis than mechanical attachments, which require springs, coplanar surfaces, or screws. Overdentures of this nature have the added advantage of being more stable and retentive than conventional partial dentures, and they are easily removed and seated without the patient having to grapple with clasps and complex paths of insertion. This particular magnetic attachment exhibited no deterioration after 3 years in function, and the results so far have been promising.
Subject(s)
Denture Retention/instrumentation , Denture, Overlay , Aged , Denture Design/instrumentation , Humans , Lasers , Magnetics/instrumentation , Male , Metals, Rare EarthABSTRACT
An in vitro experiment was conducted to evaluate the shear bond strength of a conventional GIC (glass ionomer cement) and a RMGIC (resin modified glass ionomer cement) when applied to dentin of primary and permanent teeth. Results show that the bond strength of the RMGIC was more than thrice that of the conventional GIC. Fracture analysis showed that the bond failures were cohesive in the cement.
Subject(s)
Dental Bonding , Dentin-Bonding Agents/chemistry , Dentin/ultrastructure , Glass Ionomer Cements/chemistry , Resin Cements/chemistry , Tooth, Deciduous/ultrastructure , Acrylic Resins/chemistry , Analysis of Variance , Confidence Intervals , Dental Stress Analysis/instrumentation , Humans , Microscopy, Electron, Scanning , Resins, Synthetic/chemistry , Stress, Mechanical , Surface PropertiesABSTRACT
Chemical cure resin materials are generally used in the repair of dentures. Different repair resins used may yield different results. The bond strength of three autopolymerizing resins were evaluated using a torsional test method. The results showed that Palapress and Caulk resins had a higher repair strength than Rapid Repair resin.
Subject(s)
Dental Bonding , Denture Repair , Polymethyl Methacrylate/chemistry , Acrylic Resins/chemistry , Analysis of Variance , Denture Bases , Evaluation Studies as Topic , Materials Testing , Stress, Mechanical , Surface Properties , Torsion AbnormalityABSTRACT
Denture stomatitis is a common oral disease in denture wearers. Multiple aetiological and predisposing factors are believed to be responsible for its initiation and progression. The aim of this study was to assess the relationship between denture age, denture hygiene habits, denture wearing and denture cleanliness in an elderly edentulous Asian population. Seventy-five edentulous patients, all wearing maxillary complete dentures were divided into two groups. The test group comprised 36 patients (14 male and 22 female) with Type II denture stomatitis. The control group comprised 39 subjects (14 male and 25 female) with clinically healthy palatal mucosa. A standardized interview and clinical appraisal were carried out. The dye disclosing method was used to assess denture cleanliness and the resultant staining pattern scored. Statistical appraisal between the two groups revealed significant differences in denture hygiene habits (P < 0.05), denture wearing behaviour (P < 0.01) and denture cleanliness (P < 0.01). No significant difference was observed in the age of dentures between the test group and controls (P > 0.05). In the studied Asian edentulous population, a relationship between denture hygiene habits, denture wearing behaviour and denture cleanliness to the presence of denture stomatitis was observed.
Subject(s)
Denture, Complete/adverse effects , Oral Hygiene , Stomatitis, Denture/etiology , Case-Control Studies , Dental Plaque/complications , Dental Plaque/etiology , Denture Cleansers , Female , Humans , Male , Oral Hygiene IndexABSTRACT
A denture plaque index using the dye disclosing method was evaluated in 24 patients with Type II denture stomatitis and 17 control subjects with healthy palatal mucosa. Patients with denture stomatitis had statistically significantly higher plaque scores than did controls, indicating a quantitative increase in denture plaque in patients with denture stomatitis. When this plaque index was tested by two examiners for intraexaminer and interexaminer reproducibility, it yielded a 92% to 96% reproducibility. The plaque index used in this study seems to satisfy the criteria for an ideal clinical index: It is simple, reliable, reproducible, and economical and can be carried out in the shortest possible time in a clinical setting.
Subject(s)
Dental Plaque Index , Dental Plaque/diagnosis , Dental Prosthesis/microbiology , Denture, Complete, Upper/adverse effects , Stomatitis, Denture/microbiology , Dental Plaque/complications , Female , Humans , Male , Middle Aged , Patient Compliance , Reproducibility of Results , Statistics, Nonparametric , Stomatitis, Denture/diagnosis , Stomatitis, Denture/etiologyABSTRACT
A questionnaire survey was carried out in 1995 amongst university trained general dental practitioners in the city state of Singapore to assess the use of removable partial dentures (RPD). 37% of the original sample of 469 completed and returned the questionnaire. The results of this survey indicate that RPDs are a common treatment modality in Singapore. Acrylic partial dentures appear to be the preferred choice for RPD treatment. The work profile of those who had a postgraduate qualification in removable prosthodontics did not differ from that of the general dental practitioner.
Subject(s)
Denture, Partial, Removable/statistics & numerical data , Practice Patterns, Dentists'/statistics & numerical data , Acrylic Resins , Education, Dental, Continuing , Humans , Jaw, Edentulous, Partially/therapy , Private Practice , Singapore , Surveys and Questionnaires , Tooth Preparation, ProsthodonticABSTRACT
Fracture and debonding of plastic teeth from the denture base are common clinical problems. In this study, a shear, or peeling, load was applied to the tooth-denture base junction. The bond strength of a high-impact, heat-cured denture base to three commercial brands of denture teeth, Bioform, Dentacryl, and TNR, was assessed. Ninety-three percent of the specimens exhibited cohesive failure within the body of the tooth and not adhesive failure at the tooth-denture base junction. Some of the teeth exhibited brittle fracture while others underwent distortion on loading. Dentacryl displayed the highest cohesive bond strength, followed by Bioform and TNR.
