Showing papers on "Occlusal scheme published in 2018"
TL;DR: Bilateral balanced occlusion can be considered a predictable occlusal scheme for complete dentures in terms of quality of life/satisfaction and masticatory performance, while canine guidance can be used to reduce muscular activity.
Abstract: No consensus has been reached regarding the best occlusal scheme for making complete dentures. Thus, the purpose of this systematic review was to compare bilateral balanced occlusion (BBO) with other occlusal schemes (canine guidance, lingualised occlusion and zero degree) in complete dentures. The schemes were compared in terms of quality of life/satisfaction and masticatory performance. Two independent reviewers performed a comprehensive search of studies published in or before October 2017 using the PubMed/MEDLINE, Scopus and Cochrane Library databases. The search was performed in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. The focused question was: "In conventional complete denture, is BBO better than lingualised occlusion, canine guidance and zero degree in terms of quality of life, patient satisfaction and masticatory performance/muscle activity?" Seventeen studies were selected for analysis. In total, there were 492 patients with a mean age of 64.78 years and a mean follow-up duration of 2.96 months (range: 1-6 months). All studies compared BBO with the other occlusal schemes. Eleven studies evaluated the influence of the occlusal scheme designs on quality of life and satisfaction, and 8 studies evaluated masticatory performance and muscle activity between BBO and the other occlusion schemes. The present systematic review indicated that BBO does not confer better quality of life/satisfaction or masticatory performance and muscle activity. Thus, lingualised occlusion can be considered a predictable occlusal scheme for complete dentures in terms of quality of life/satisfaction and masticatory performance, while canine guidance can be used to reduce muscular activity.
30 citations
TL;DR: Significantly longer disclusion time, higher posterior frictional contacts, and more TMD symptoms were observed in the post-orthodontics group, suggesting that orthodontic treatment increases posterior tooth friction.
Abstract: Objective: Published studies indicate that orthodontically treated patients demonstrate increased posterior occlusal friction contributing to temporomandibular disorder (TMD) symptoms. This study investigated measured excursive movement occlusal contact parameters and their association with TMD symptoms between non- and post-orthodontic subjects.Methods: Twenty-five post-orthodontic and 25 non-orthodontic subjects underwent T-Scan® computerized occlusal analysis to determine their disclusion time (DT), the excursive frictional contacts, and occlusal scheme. Each subject answered a TMD questionnaire to determine the presence or absence of TMD symptoms. Statistical analysis compared the within group and between group differences (p < 0.05).Results: Statistically significant differences were observed in the disclusion time: DT = 2.69 s in the post-orthodontic and 1.36 s in the non-orthodontic group. In the non-orthodontic group, 72.7% working and 27.3% non-working side contacts were seen, while in th...
30 citations
TL;DR: Evidence is provided that BO is as effective as LO for the fabrication of complete dentures and the VAS score of patient satisfaction and prosthodontist satisfaction increased at third compared to first month after delivery.
Abstract: BACKGROUND Occlusal scheme can affect denture retention, stability, occlusal force distribution, aesthetics, masticatory function, patient comfort and general patient satisfaction with dentures. OBJECTIVES This study aimed to compare the patient satisfaction with 3 types of complete denture occlusion including fully bilateral balanced occlusion (FBBO), newly presented buccalised occlusion (BO) and lingualised occlusion (LO). METHODS In this parallel randomised clinical trial, new conventional complete dentures were fabricated for 86 volunteers. Participants were randomly allocated to 3 groups with 3 different occlusal schemes. All patients were recalled at 1 and 3 months after delivery for data collection. The 19-item version of Oral Health Impact Profile for Edentulous Patients questionnaire was used in this study. The visual analogue scale (VAS) was used for assessment of the prosthodontist's attitude towards denture quality, patient's attitude towards different occlusal schemes and evaluation of patient satisfaction. Data were analysed using the Wilcoxon signed rank test, the Kruskal-Wallis test and the post hoc Dunn test via SPSS version 18.0 (P ≤ .05). RESULTS Eighty-six patients completed the study, and their data were analysed (mean age ± standard deviation = 57.78 ± 9.98 years). The only significant difference when comparing the 3 groups was physical pain, which was significantly higher in FBBO group. No significant differences were found for the VAS scores of patient and prosthodontist satisfaction or the domain scores among the 3 occlusal schemes either at 1 or at 3 months post-delivery. The VAS score of patient satisfaction and prosthodontist satisfaction increased at third compared to first month after delivery. CONCLUSION The results of this randomised clinical trial provided evidence that BO is as effective as LO for the fabrication of complete dentures.
16 citations
TL;DR: There is a need for high-quality clinical research, investigating both chewing ability and quality of life in complete denture wearers in the long-term, challenging the notion that BO may be the optimal occlusal scheme.
Abstract: Edentulism presents an ongoing challenge for prosthodontic dentistry. Many aspects of complete denture construction lack contemporary evidence. One such aspect is denture occlusion. Balanced occlusion (BO) has become the prevailing occlusal scheme. It has been suggested that canine guidance (CG) is unsuitable for complete denture occlusion due to an increased risk for tipping of the prostheses. However it may be indicated in patients with minimal alveolus resorption. There has been limited evidence suggesting the superiority of either occlusal scheme over another. This article investigates the available literature assessing complete denture occlusion by means of clinical trials or reviews of evidence. We utilised PRISMA guidelines to investigate the effect of complete denture occlusal scheme (balance occlusion vs. canine guidance) on functional or quality of life. Seven studies were included for review. All studies were poor to moderate quality with the majority lacking randomisation, blinding and demographic data from the study sample. The available evidence suggests that the differences between occlusal schemes may be small, challenging the notion that BO may be the optimal occlusal scheme. There is a need for high-quality clinical research, investigating both chewing ability and quality of life in complete denture wearers in the long-term.
8 citations
TL;DR: In all the three occlusal schemes, the working side received more strain than the non-working side during eccen-tric movements, with the buccal shelf being the primary strain-bearing area to tolerate more pressure than the rest of the denture-supporting areas.
Abstract: Background. Various occlusal schemes have been introduced over the years to enhance the stability, comfort, beauty and function of complete denture, of which lingualized, bilateral balanced and monoplane occlusions are the most recommended. The aim of this study was to compare the strain in mandibular denture-supporting structures in three different occlusal schemes. Methods. Two mandibular and maxillary models were simulated using epoxy resin, and strain gauges were embedded on each side of the mandible in mental foramen, buccal shelf and distolingual area. Strain values were measured in three occlusal schemes at centric occlusion protrusive and lateral movements. Data were analyzed with one-way and three-way ANOVA, followed by post-hoc Tukey tests. The significant level was set at 0.05. Results. The mean strain in denture-supporting area was lower in monoplane occlusion than the two other occlusal schemes, and the mean of values in the buccal shelf was higher than that of mental foramen and distolingual area. In all the three occlusal schemes, the mean strain values on the working side were higher than those on the non-working side during eccentric movements. Conclusion. Monoplane occlusal scheme imposed lower strain on denture-supporting area, with the buccal shelf being the primary strain-bearing area to tolerate more pressure than the rest of the denture-supporting areas. In terms of strain distribu-tion scheme, in all the three occlusal schemes, the working side received more strain than the non-working side during eccen-tric movements.
4 citations
TL;DR: Lingualized occlusal scheme showed less stresses transmitted to dental implants and their supporting structures as reflected in decreased periimplant bone loss.
Abstract: Objective: The success of dental implants depends on accurate planning of the occlusal scheme enrolled in the overlying prosthesis, so the present study was conducted to evaluate the effect of two different occlusal schemes on the rate of supporting bone resorption in All on 4 mandibular implant retained overdentures constructed with two occlusal schemes, lingualized and group function. Clinical occlusal analysis was also done using digital T-scan to analyze the occlusion and disocclusion timings.Materials and Methods: Fourteen edentulous male patients were selected according to certain criteria, patients had guided surgical installation of four implants following “All on 4 “concept and were randomly allocated into two equal groups, Group I:rehabilitated with provisional fixed detachable prosthesis following the group function occlusal concept and Group II: rehabilitated with provisional fixed detachable prosthesis following the lingualized occlusal concept. The implants in the two groups were monitored using cone beam computed tomography at loading, 6 months and one year later. Digital occlusal analysis was performed using the T-scan at loading.Results: The results of the current study showed statistically significant less bone height changes values in group I in comparison to group II as per the radiographic outcomes while the occlusal analysis showed statistically significant increase in disocclusion time (in seconds)in group I.Conclusion: Lingualized occlusal scheme showed less stresses transmitted to dental implants and their supporting structures as reflected in decreased periimplant bone loss.
3 citations
TL;DR: The first of this three-part series will focus on the occlusal assessment and the proposed features of the ‘ideal Occlusal scheme’, and the examination of the static and dynamic relationship between occlusion and dynamics.
Abstract: The first of this three-part series will focus on the occlusal assessment and the proposed features of the ‘ideal occlusal scheme’. The examination of the static and dynamic relationship ...
3 citations
TL;DR: Specific occlusal scheme in NPARD promoted improvement in the therapy, and patients' painful symptoms were reduced and their mandibular movements were corrected.
2 citations
01 Apr 2018
TL;DR: It was concluded that both bilateral balanced occlusion and canine guidance Occlusion can be used successfully in thermoplastic complete dentures without affecting the masseter or temporalis muscle activity.
Abstract: The purpose of this study was to evaluate the effect of two occlusal schemes; canine guidance occlusion and bilateral balanced occlusion on the masseter and temporalis muscle activity in thermoplastic complete dentures. Ten male completely edentulous patients whose ages ranged from 55 to 70 years were selected. Half of the selected patients received a thermoplastic complete denture with canine guidance occlusal scheme and the other half of the patients received a thermoplastic complete denture with bilateral balanced occlusal scheme. Electromyographic evaluation of the masseter and temporalis muscles, during chewing banana, peanut and carrot, was conducted on the patients after using their dentures for one month. Each occlusal scheme was then converted into the other scheme using the same dentures, and the procedure of evaluation was repeated after another one month. The data were collected, tabulated and analyzed by using Paired sample t-test. The results of this study showed that there was no significant difference between the canine guidance occlusal scheme and the bilateral balanced occlusal scheme in the electromyographic activity of both masseter and temporalis muscles during chewing all test foods. It was concluded that both bilateral balanced occlusion and canine guidance occlusion can be used successfully in thermoplastic complete dentures without affecting the masseter or temporalis muscle activity.
2 citations
TL;DR: Modification of impression procedure and modification of occlusal scheme in fabricating complete dentures to manage flabby ridge, flat ridge, and prognathic jaw relation with posterior cross-bite at once in complete edentulous patient is described.
Abstract: Background: Patient’s perspective is analyzed on the treatment options when invasive treatments, such as implant, bone grafting, or vestibuloplasty become contraindication, and a noninvasive approach, such as conventional complete dentures became treatment of choice that could be done. Aim: This clinical report describes a modification of impression procedure and modification of occlusal scheme in fabricating complete dentures to manage flabby ridge, flat ridge, and prognathic jaw relation with posterior cross-bite at once in complete edentulous patient. Case report: A 66-year-old female patient was wearing single upper complete denture since her lower complete denture was broken a year ago. On clinical examination, there were flabby ridge on anterior and flat ridge on posterior residual ridges of maxilla. Moderate resorption was found on posterior mandibular residual ridges. Prognathic jaw relation with posterior cross-bite was discovered from tentative vertical dimension (VD) procedure. Conclusion: Modified impression procedure, which was used in this case for flabby and flat ridge on maxilla using clear processed acrylic resin tray with controlled minimally displacive impression technique, provides mucofunctional impression on posterior and mucostatic impression on anterior. Anterior artificial teeth were arranged to neutrognathic jaw relation without vertical overlap to avoid pressure on the flabby ridge. Modified lingualized occlusion was used to overcome flat ridge with posterior cross-bite. Clinical significance: Modified impression procedure used in this case was simple and can record abnormal residual ridges in its compressibility. The modified lingualized occlusion can help maintain the occlusal forces right on the crest of residual ridges without interfering the neutral zone. Hence, fabrication of a stable and satisfying denture can be achieved.
1 citations
TL;DR: “ 회복시키는데 있다”, “”�”의 흡수로 인해 골이식을 동반한 광범위한 임플란트 시
Abstract: 조골의 흡수로 인해 골이식을 동반한 광범위한 임플란트 시술이 요구되므로 시술 기간이 길어 큰 부담을 받게 된다. 이에 여전히 많은 완전 무치악 증례에서 의치를 사용하고 있다. 2010년 보건 복지부 국민구강건강실태조사에 따르면 의치 사용자는 약 400 만 명에 달했고, 현재는 400만 이상이 될 것으로 예상된다. 또 65 세 이상 노인 2명 중 1명은 틀니를 사용하고 있으며, 만 66세 이 상 노인 중 56% 정도는 음식을 씹는데 불편을 호소하고 있는 것 으로 나타나 성공적인 의치치료의 중요성을 생각하게 한다. 총의치 치료의 목표는 결여된 심미와 저작, 발음을 기능적으 로 회복시키는데 있다. 이를 위해 유지와 안정, 지지를 달성하는 것은 성공적인 의치를 만들기 위한 핵심 요소이다. Jacobson과 Krol은 이러한 주요 요소가 인상면, 연마면 및 교합면의 설계에 의해 결정된다는 것을 보여 주었다. 특히, 무치악 환자에서 악간 관계의 부조화는 자주 관찰되는데 이 때 인공치의 교합접촉 시 의치 안정요소가 부족하면 환자의 불편감과 점막 외상, 나아가 서는 근육과 신경의 변화나 감정적 장애를 일으킬 수 있다. 따라
TL;DR: The results showed that occlusion time, right and left disocclusion time are higher in monoplane occlusal scheme dentures than lingualized occlusions scheme Dentures and the difference was statistically insignificant.
Abstract: Purpose: The purpose of this study was to compare the effect of two different complete denture occlusal schemes on the occlusion and disocclusion times. Material and methods: Eight completely edentulous male patients were selected, for each patient, two conventional complete dentures were constructed, one of them following the lingualized concept of occlusion and the other following monoplane concept of occlusion using the conventional technique of denture construction. Computerized occlusal analysis was conducted using the T-Scan system. Occlusal parameters (OT and DT) were recorded for both dentures for each patient. Results: The results showed that occlusion time, right and left disocclusion time are higher in monoplane occlusal scheme dentures than lingualized occlusal scheme dentures and the difference was statistically insignificant. Conclusion: Within the limits of this study no significant difference in occlusion and disocclusion time between lingualized and monoplane occlusal sheme complete dentures were found.
01 Jan 2018
TL;DR: Guidelines for the occlusion of mandibular implant-supported overdentures are presented based on best available evidence and the various occlusal schemes that the posterior denture teeth can be arranged are described and are related to several specific patient scenarios.
Abstract: Guidelines for the occlusion of mandibular implant-supported overdentures are presented based on best available evidence. Often the cause for late implant failure is due to occlusal overload. Various occlusal schemes have been described in the literature, but none have been determined as being superior over another. More research is required to evaluate the prognosis of various occlusal schemes following treatment. Moreover, the lack of devices for monitoring objectively the degree of force placed on implants makes the topic a clinical challenge where proper tooth selection is important. In this chapter, the records required to set denture teeth and their relation to one another are described. Based on the setting of the articulator and patient situation, the occlusal scheme can be linked to specific treatment protocols. Particularly, the various occlusal schemes that the posterior denture teeth can be arranged are described and are related to several specific patient scenarios.