Showing papers on "Occlusal scheme published in 2006"

Implant-supported Fixed Prosthetic Treatment Using Very Small-diameter Implants: A Case Report

Abstract: A case report is presented where an edentulous mandibular anterior site is restored with very small- or mini-diameter (1.8-mm) dental implants. The surgical and prosthetic use of very small-diameter dental implants is discussed. Such implants can be successfully used in appropriate sites where there is adequate bone density for immediate implant stability and an implant-protected occlusal scheme.

Comparison of the occlusal vertical dimension after processing complete dentures made with lingualized balanced occlusion and conventional balanced occlusion

Abstract: Statement of problem An increase in occlusal vertical dimension (OVD) may occur after processing complete dentures. Although many factors that generate this change are known, no information is available in the dental literature regarding the effect that the occlusal scheme may have on the change in OVD. Purpose This in vitro study compared the increase in OVD, after processing, between complete dentures with teeth arranged in lingualized balanced occlusion and conventional balanced occlusion. Material and methods Thirty sets of complete dentures were evaluated as follows: 15 sets of complete dentures were arranged in conventional balanced occlusion (control) and 15 sets of complete dentures were arranged in lingualized balanced occlusion. All dentures were compression molded with a long polymerization cycle. The occlusal vertical dimension was measured with a micrometer (mm) before and after processing each set of dentures. Data were analyzed using an independent t test (α=.05). Results The mean increase in the OVD, after processing, was 0.87 ± 0.21 mm for the control group and 0.90 ± 0.27 mm for the experimental group. There was no significant difference between the groups. Conclusion After processing, dentures set in lingualized balanced occlusion showed an increase in OVD similar to those set in conventional balanced occlusion.

Rationale for choices of occlusal schemes for complete dentures supported by implants.

Abstract: This review of occlusal considerations for implant-supported complete dentures reflects the majority opinion of authors according to clinical observations and research-documented evidence. Occlusal concepts are presented for the implant-supported complete dentures regarding analysis of loads applied to dental implants, location and number of implants, occlusal materials, and occlusal scheme.

Deviation from the Broadrick occlusal curve following posterior tooth loss.

Abstract: summary Production of an appropriate occlusal curve for dentitions which have become deranged because of tooth loss, overeruption, tipping and drifting can present challenges for the dental technician. An earlier paper (J Oral Rehabil, 2005 32: 895–900.) demonstrates that the use of the Broadrick flag method for producing the occlusal curve is relatively accurate for most intact arches. This study demonstrates that when a posterior tooth has remained unopposed for 5 years or more positional changes, which cause deviation from the Broadrick curve, occur. The extent of the deviation may be extreme, potentially leading to difficulties in restoring a harmonious occlusal scheme. This study also demonstrates that the Broadrick curve may provide an accurate reproduction of the occlusal curve, even when the tooth forming the posterior determinant of the curve is tipped. A moderate degree of tipping of this tooth has little effect on the radius of the Broadrick curve.

[Rehabilitation of an abraded occlusion with Procera-ZrO2 all-ceramic crowns. A case report].

Abstract: The rehabilitation of a patient with advanced tooth wear by means of Procera ZrO2 ceramic crowns is described. A healthy, 60 year old patient complained about front teeth esthetics and impaired function due to reduced tooth height. He was aware of bruxism and wished full mouth rehabilitation. The clinical examination showed that tooth wear was generalized, but most teeth could be maintained in both jaws. A staged procedure was planned, starting with a splint therapy and a provisional fixed prosthesis to reestablish correct vertical dimension of occlusion (VDO) and stable occlusal contacts. The new ZrO2 material with the Procera technique was chosen to restore all teeth in both jaws, except the mandible front teeth. In the second treatment phase, crown lengthening of the maxillary front teeth was performed and one implant placed to replace a maxillary premolar. After final tooth preparation, impression taking and bite registration the ZrO2 crown-copings were scanned, processed and completed by veneering. A flat occlusal scheme with stable front teeth guidance was established. The advantage of the presented treatment is the esthetic result in combination with a material of high mechanical and biological quality.

Tooth position in full-mouth implant restorations--a case report.

Abstract: Reconstructing the edentulous mouth with opposing, fixed, implant-supported metal-ceramic restorations demands great attention to detail. This article reviews the basic principles of tooth position in dentate patients and in complete denture prosthodontics and relates them to the edentulous patient undergoing implant restoration. Determining gnathologic points and recognizing anatomic landmarks found in the edentulous jaws aid in correct tooth positioning, resulting in proper comfort, function, speech, esthetics, and a prearranged occlusal scheme, all of which are critical factors behind restorative-driven implant dentistry.

Occlusal Analysis of the Subjects with Chewing Side Preference Using the T-Scan II System

Abstract: While orofacial pain or various dental factors are generally considered as the primary cause of unilateral chewing tendency, there exist several studies indicating that dental factors did not affect the preferred chewing side. The aim of this study was to examine difference of occlusal scheme between the subjects with and without chewing side preference. The difference between the chewing and non-chewing sides in the unilateral chewing group was investigated as well. Computerized, T-Scan II system was used for occlusal analysis. 20 subjects for the unilateral chewing group (mean age of 25.25±2.84 years) and 20 subjects for the bilateral chewing group (mean age of 27.00±5.07 years) were selected by a questionnaire on presence or absence of chewing side preference and those with occlusal problem or pain and/or dysfunction of jaw were excluded. T-Scan recordings were obtained during maximum intercuspation and excursion movement. The number of contact points, relative occlusal force ratio between right and left sides, tooth sliding area and elapsed time throughout the maximum intercuspation were calculated. Elapsed time for excursion was also investigated. The results of this study shows that the unilateral chewing group had the smaller average tooth contact areas compared with those of the bilateral group (p＜0.005). In the unilateral chewing group, the contact areas of non-chewing side are smaller than those of chewing side (p＜0.005). The contact areas on their preferred sides were not significantly different with those of right or left side of the subjects without chewing side preference. There was no significant difference in the elapsed time during maximum intercuspation and lateral excursion, the sliding areas and relative of right-to-left occlusal force ratio between the two groups. From the results of this study, it is likely that individuals prefer chewing on the side with more contact areas for efficient chewing.