Stability Of Complete Dentures Research Articles

Color stability of heat polymerized complete dentures and 3D printed CAD/CAM dentures

Background/aim Color stability of complete dentures is one of the most significant aspects that affect the success of complete dentures (CD) and improve the patient’s quality of life. Therefore, the present clinical crossover research targeted to assess and compare the color stability of conventional heat-polymerized polymethyl methacrylate (PMMA) CDs and three-dimensional (3D)-printed dentures and their effect on the ‘oral health-related quality of life’ (OHRQoL). Patients and methods Twenty completely edentulous patients aged from 45 to 75 received two sets of CDs. The first denture set was polymethyl methacrylate CD (group I), and the patients were instructed to use it for 3 months. Then after 3 months, the patients were instructed to wear the 3D-printed CD set (group II) and use it for another 3 months. The color change of the CD’s base was evaluated at denture insertion after 1 and 3 months using a spectrophotometer. The ‘OHRQoL ’ was used to assess patient satisfaction at the end of the treatment of every denture set. Statistical analysis was accomplished through an independent t test and one-way analysis of variance. Results Regarding the color change of the CD denture base at denture insertion, there was an insignificant distinction between group I and group II (P>0.05). While after 1 and 3 months, group I showed a significant increase in the color change when compared with group II (P<0.05). When comparing the color change in each group during the different follow-up periods, the color change was significantly increased in both groups (P<0.05). In terms of ‘OHRQoL,’ there was a significant distinction between group I and group II (P<0.05). Group II (18.89) scored less than group I (43.42). Conclusion 3D-printed CDs exhibit good color stability when compared with conventional CDs. The OHRQoL revealed that 3D-printed CDs have more patient satisfaction than conventional CDs.

A Novel Approach of Prosthodontic Management of Flabby Tissue in Maxillary Anterior Region: A Case Report

A fibrous which is also called as hyperplastic ridge is a superficial area of mobile soft tissue affecting the maxillary or mandibular alveolar ridges. It develops when alveolar bone gets replaced by hyperplastic soft tissue and is a common finding particularly in the upper anterior region seen in long term denture wearers. Masticatory forces often displace this mobile denture-bearing tissue, which leads to altered denture positioning and loss of peripheral seal. Forces exerted during the act of impression making results in distortion of the mobile tissue. Unless it is managed appropriately by special impression techniques, such ‘flabby ridges’ adversely affect the support, retention and stability of complete dentures. This paper presents prosthodontic management of a patient with flabby ridges with special impression technique.

The Neutral Zone Approach with CAD-CAM Record Bases.

Lack of adequate retention, support, and stability in the complete denture can be attributed to a poor fit or incorrect shape of the polished surfaces. This article presents a case using the neutral zone technique effectively with the fabrication of computer-aided design and computer-aided manufacturing (CAD-CAM) record bases in an edentulous patient with severely resorbed alveolar ridges and discusses the overall treatment steps and clinical implications of this technique. A stable neutral zone and an accurate jaw relation were recorded using CAD-CAM record bases and stability of complete denture was optimized by arranging denture teeth and reforming polishing surfaces in the neutral zone. A new complete denture was fabricated for a patient with atrophic alveolar ridges by a technique utilizing the neutral zone with CAD-CAM record bases.

Minimise Weight, Increase Retention: Hollow Denture - A Case Report

The increased inter-ridge space due to resorption of residual ridge and long upper lip length makes the prosthetic rehabilitation of such patient a great challenge for a prosthodontist. Retention and stability of complete denture in cases of residual ridge resorption is usually reduced because of minimised denture bearing area. The maxillary denture fabricated in such patients are bulky in nature which further compromise its retention. So, in this case report a simplified technique is described for construction of hollow maxillary denture which being light in weight further improves denture retention.

Tooth Supported Overdenture as Prosthetic Solution for Elderly Patients: A Case Series

Overdenture treatment is a notion which precludes the inevitability of “floating plastic” in edentulous mouths. The concept of tooth retained overdenture is a simple and cost effective way to retain few firm teeth that are present in an otherwise compromised dentition to increase the retention and stability of complete denture leading to increased chewing efficiency of patient. The concept of overdentures is a positive means for delaying the process of complete edentulism and helps in reducing bone resorption. To top it all, it gives the patient the sensitivity and proprioception of having prosthesis with his natural teeth still present. In this article, case reports with three different types of Overdentures are discussed: Overdenture with submerged abutment, Overdenture without coping on abutment and overdenture with coping based on available inter-arch space.

Differences in quality of life and patient satisfaction between complete denture occlusion schemes: A parallel randomized control trial

Statement of problemBilateral balanced occlusion has been advocated over nonbalanced occlusion for improved removable complete denture stability and function. However, assessments of quality of life and patient satisfaction studies between the 2 occlusion schemes are lacking. PurposeThe objective of this parallel randomized control trial was to determine the difference in quality of life and patient satisfaction between the nonbalanced and bilaterally balanced occlusal schemes. Material and methodsSixty participants were included in the parallel randomized control trial of nonbalanced and bilaterally balanced complete dentures. Thirty were recruited into each group with definitive inclusion and exclusion criteria as per the Consolidated Standards of Reporting Trials (CONSORT) guidelines. Quality of life was estimated from the oral health quality of life (Oral Health Impact profile) for edentulous patients questionnaire, and patient satisfaction was analyzed from a visual analog scale. The estimation was made at 0, 3, and 6 months after denture insertion. The data were statistically analyzed with the Friedman, Mann-Whitney, and t test (α=.05). ResultsThe mean ±standard deviation Oral Health Impact profile score was 60.81 ±8.87 for nonbalanced dentures and 64.12 ±8.98 for bilaterally balanced dentures. The mean ±standard deviation visual analog scale score was 2.84 ±0.28 for nonbalanced dentures and 2.90 ±0.31 for bilaterally balanced dentures. The Mann-Whitney and t test indicated nonsignificant differences between the 2 groups and at different time intervals for Oral Health Impact profile and visual analog scale scores (P>.05). ConclusionsThe study detected no significant differences between the 2 occlusal schemes in quality of life or patient satisfaction.

Efficacy of denture adhesives in complete denture wearers compared to denture wearers not using denture adhesives. A systematic review.

The objective of this systematic review was to evaluate the efficacy of denture adhesives (DAs) in completely edentulous denture wearers compared to not using DAs. PubMed, Web of Science, Cochrane Library, and EMBASE were searched from the database inception up to 6 February 2020 for Randomized Controlled Trials (RCTs) involving patients with complete dentures in both arches where the use of DAs was compared to no use of DAs. A total of 497 abstracts were reviewed, resulting in inclusion of 10 RCTs. Outcomes reported in the included trials were thoroughly reviewed and tabulated. The Cochrane risk of bias tool was used. All 10 studies were assessed at unclear (10%) or high risk of bias (90%). Studies showed DAs improved mainly retention/stability, and masticatory/chewing ability/performance, compared to no adhesives. Most studies showed favorable results for DAs on retention and stability of complete dentures, masticatory performance, patient's comfort and satisfaction. Due to the heterogeneity of the outcomes, unclear/high risk of bias and small sample sizes, the quality of the evidence was very low. More high-quality research is needed with improved blinding and use of standardized methods to evaluate the efficacy of DAs.

Vestibuloplasty as an aid to enhance complete denture stability

Vestibuloplasty as an aid to enhance complete denture stability

Study shows the presence of an association between retention and stability of complete dentures and oral health–related quality of life

Limpuangthip N, Somkotra T, Arksornnukit M. Impacts of denture retention and stability on oral health-related quality of life, general health, and happiness in elderly Thais. Curr Gerontol Geriatr Res. 2019 Jul 16;2019:3830267. https://doi.org/10.1155/2019/3830267.

Comparing the effect of three denture adhesives on the retention of mandibular complete dentures for diabetic patients (randomized clinical trial)

ᅟᅟᅟRetention is an important parameter in the success of the prosthodontic treatment. Retention depends upon numerous factors such as physical, physiological, psychological, mechanical, and surgical factors. Denture adhesives increase the retention and stability of complete dentures. Denture adhesives have many indications such as immediate dentures, flat ridges, and patients with xerostomia and poor muscle control.Aim of studyThe present in vivo clinical study evaluates whether the adhesives used are truly effective to improve the mandibular complete denture retention for low well-rounded mandibular ridges in controlled diabetic patients.Materials and methodsAn in vivo clinical study is made of 30 male completely edentulous patients with low well-rounded mandibular ridges with an age group of 50–70 years were selected. All patients were controlled diabetic type 2. New complete dentures were constructed for them. The universal testing machine was used to measure forces required to dislodge the dentures. Retention of mandibular complete dentures was measured without adhesive and with the use of three types of denture adhesives after adaptation period of 1 month. A paste type (Fittydent) and two cream types (Protefix and Corega) were used. The average records after 15 min, 1 h, and 2 h were recorded.Results and conclusionThis study revealed that denture adhesives increase retention of complete dentures. Fittydent adhesive paste was more effective in improving the retention than Protefix and Corega adhesive creams. Therefore, denture adhesives improve patient satisfaction.

Relationship between the clinical assessment of maxillary and mandibular complete denture stability and denture-bearing area towards the patient’s satisfaction level

Introduction: The dentist’s evaluation of complete denture often differs from the patient’s evaluation. Dentists are more prioritising the clinical aspects of the dentures, such as vertical dimension, aesthetical, stability, and denture-bearing area, while patients are more prioritising their satisfaction based on aspects such as aesthetical, mastication, comfort, and phonetic ability. The purpose of this study was to determine the relationship between the stability of maxillary and mandibular denture-bearing area towards the complete denture patient’s satisfaction level. Methods: This study was a cross-sectional study with purposive sampling as the sampling method. The sample of this study was as much as 30 complete denture patient. The patients were interviewed using a questionnaire in each of the patient’s house, to obtain a more honest patient’s satisfaction assessment on the dentures, without being affected by any clinical environment and assessment. The interview was conducted before the clinical evaluation was performed. The statistical analysis was performed using the Fisher’s test. The stability of the denture-bearing area was evaluated clinically. Mastication ability and patient’s comfort were evaluated using a questionnaire. Result: A significant relationship was found between the stability of maxillary denture-bearing area towards mastication (p = 0.012), and the stability of mandibular denture-bearing area towards mastication (p = 0.029); while no significant relationship was found between the stability of maxillary denture-bearing area towards the patient’s comfort (p = 0,051), and the stability of mandibular denture-bearing area towards the patient’s comfort (p = 0,547). Conclusion: There was a relationship between the stability of maxillary and mandibular denture-bearing area towards the patient’s masticatory satisfaction level. However, the relationship between the stability of maxillary and mandibular denture-bearing area towards the patient’s comfort was not found.

Mishmash Impression Technique for Managing Maxillary Anterior Fibrous Ridge

Introduction: Flabby or fibrous ridge is one of the consequences of long term wearing of complete dentures. It can develop where hyperplasic soft tissue replaces the alveolar bone and is a common finding, particularly in the upper anterior region of long term denture wearers. Forces exerted during impression making can result in distortion of the mobile tissue unless managed appropriately; such flabby ridges adversely affect support, retention and stability of complete dentures. Many impression techniques have been developed to help overcome this problem. While these vary in the method applied, they are similar in their complexity, are often quite time-consuming to perform and rely on materials not commonly used in contemporary general dental practice. The purpose of this article is to describe an impression technique for flabby ridges usingrubber base impression materials, routinely available in general dental practice.

Management of flabby ridge case: An arduous task in undergraduate practice

A fibrous or flabby ridge is a superficial area of mobile soft tissue affecting the maxillary or mandibular alveolar ridges. It can develop when hyperplastic soft tissue replaces the alveolar bone and is a common finding particularly in the upper anterior region of long-term denture wearers. Masticatory forces can displace this mobile denture-bearing tissue, leading to altered denture positioning and loss of peripheral seal. Unless managed appropriately, such “flabby ridges” adversely affect the support, retention, and stability of complete dentures. Many impression techniques have been proposed to help overcome this difficulty. This paper presents case report for prosthodontic rehabilitation of a patient with flabby ridge with McCord and Ahmad impression technique.

Effect of denture adhesive on stability of complete dentures and the masticatory function.

This study examines the effects of denture adhesive on the retention and stability of complete dentures and the masticatory function. The authors estimated the stability of complete dentures from 3-dimensional (3-D) denture movement and rotational denture movement and additionally the masticatory function from cycle time and chewing time. Six edentulous subjects who participated in this study had old and newly fabricated complete dentures. Upper denture movement was recorded using a 3-D motion capture system while chewing 3 kinds of food (peanuts, fish paste, raisins). Both the new and old dentures showed that using a denture adhesive contributes to reducing 3-D denture movement, rotational denture movement and chewing time during chewing the various foods. The cycle time in new and old dentures was statistically unaffected by applying denture adhesive. There was no statistically significant difference in improvement in 3-D denture movement or rotational denture movement between the new and old dentures, for any of the foods. This study observes the overall effect of denture adhesive during use for both dentures. The results of this study suggest that denture adhesive contributes to reducing denture movement and so improves chewing function.

The application of the concept of denture bearing area to get the stability of complete dentures

Denture is a device in the field of dentistry that serves to replace natural teeth are missing, either installed in a fixed or removable depending upon indication of cases of tooth loss. The purpose of making this paper is to convey the need to understand the concept of denture bearing area before performing maintenance manufacture of complete dentures in order to obtain a successful restoration of order.Replacement of natural teeth missing denture aims to restore masticatory function, speech and esthetics of the users, but sometimes it is not obtained due to factors related to retention, stability, and support the denture is not obtained, so that the denture feels less solid when used in the mouth.The stability of the denture which is strongly associated with retention factor, stability, and support can only be obtained if a dentist who wants to make complete dentures understand the concept of denture bearing area.The concept of denture bearing area discusses the anatomical landmarks are not toothed area which borders the area is allowed to put the denture base, the thickness of the supporting tissues of the denture, so that the network can be pressed or not (compressibility network). This will guide the operator to select the type of materials and techniques in printing jaw. An understanding of the concept of good denture bearing are will guide a carrier, for planning making dentures well, so that the stability and comfort of a restoration of complete dentures can be obtained.

Effect of Different Denture Base Materials and Changed Mouth Temperature on Dimensional Stability of Complete Dentures.

Background. Type of materials used in fabrication of denture base has an effect on dimension during denture base material processing and other factors related to clinical use. Objective. The study aims were to assess the dimensional stability including thermal changes of three different denture base materials. Methods. Ninety patients were selected to construct complete dentures with different denture base materials. They were randomly divided into three groups: group 1, patients with cobalt chrome metallic base; group 2, patients with heat curing acrylic resin fabricated by injection moulding technique; and group 3, patients with denture bases fabricated by conventional heat curing acrylic resin. The dimensional changes were assessed using digital caliper. Results. After the twelfth month, injection moulding acrylic resin had significantly the highest dimensional change followed by the conventional heat curing acrylic resin. There were no significant differences in the dimensions between the three types of denture base materials at normal mouth temperature, while, after hot tea drinking at 45°C, the dimensional change was significantly the highest in cobalt chrome metallic denture base group. Conclusion. Cobalt chrome metallic denture base has stable dimension compared to denture bases fabricated of acrylic resin but it was more affected by altered mouth temperature. The study was registered in the International Standard Randomized Controlled Trials Number (ISRCTN) registry with study ID (ISRCTN94238244).

Implant-supported overdentures

Retention of the lower complete denture is always a question for the dentist and the patient because of the alveolar ridge resorption and many muscle attachments to the mandible. The treatment of edentulous patients using oral implants does not always permit the placement of an adequate number of implants for fixed prosthesis construction; the reasons are insufficient anatomical bone height of the alveolar ridge, health restrictions and financial limitations. Placement of two dental implants in the cuspid regions anterior to the mental foramina on either side will improve the retention and stability of complete dentures in edentulous patients. Implant-supported overdentures with ball and socket attachments are more successful, provide good retention, stability for the denture and improve comfort and confidence for the edentulous patient while speaking and masticating.

Neutral zone concept for unstable mandibular complete denture: A case report

Abstract The tooth position and flange contour have great influence on the stability of a denture. We should not be dogmatic and insist that teeth be placed over the crest of the ridge, buccal or lingual to the ridge. Teeth should be placed as dictated by the musculature, and this will vary for different patients. The neutral zone technique is the most effective way of improving the stability of complete denture especially for patients with atrophic ridges or diminished neuromuscular control. The technique involves recording neutral zone using tissue conditioner and fabrication of a denture which is in harmony with the surrounding oral musculature. This article aims to increase the awareness of dental practitioners to use neutral zone concept in case of denture stability difficulties. How to cite this article Sachin B, Jain J, Kalavathi M., Kumari N, Neutral zone concept for unstable mandibular complete denture: A case report, CODS J Dent 2015;7:45-47.

La tecnica degli “anelli” personalizzati

Occlusal considerations for removable prostheses are essentially the same as for fixed restorations.The approach to establishing occlusion for partial dental prostheses (PDPs) is usually conformative. Partial dentures should not transmit excessive forces to supporting tissues nor interfere with any contacts in intercuspal contact position (ICP) or in functional movements. Occasionally, a reconstructive approach using onlays is used.Occlusion for complete dental prostheses has three significant differences from partial dental prostheses:•The absence of natural teeth in edentulous patients may present significant difficulties in determining an acceptable occlusal vertical dimension.•Complete denture occlusion is always a reorganized occlusion.•Absence of teeth produces problems of denture stability (resistance to displacement by lateral forces), particularly of the mandibular complete denture. The stability of complete dentures is optimized by a balanced occlusion/articulation.This chapter provides an overview of occlusion for partial and complete removable prostheses, including discussion of both clinical and laboratory procedures.

DISPLACEABLE TISSUE: A CLINICAL CHALLENGE FOR A PROSTHODONTIST

A fibrous or flabby ridge is a superficial area of mobile soft tissue affecting the maxillary or mandi bular alveolar ridges. Restoration of such ridges often requires s pecial consideration in impression making. Masticat ory forces can displace this mobile denture-bearing tissue, leadin g to altered denture positioning and loss of periph eral seal. Forces exerted during the act of impression making can res ult in distortion of the mobile tissue. Unless mana ged appropriately by special impression techniques, suc h ‘flabby ridges’ adversely affect the support, ret ention and stability of complete dentures. This paper describe s a technique especially applicable for mandibular edentulous flabby ridges. The choice of the impression materia l, as well as the design of the impression tray, fo cuses on preventing distortion of the displaceable residual ridges during impression making. The use of this te chnique helps in maintaining the contour and capturing the detail of the tissues, as well as in accurately determini ng the extent of the muccobuccal denture extensions.