Effects of load and indicator type upon occlusal contact markings

2008 ◽  
Vol 85B (1) ◽  
pp. 18-22 ◽  
Author(s):  
Muhammad N. Saad ◽  
Gabriel Weiner ◽  
David Ehrenberg ◽  
Saul Weiner
Keyword(s):  
Occlusal Contact ◽  
Indicator Type

Effects of occlusal scheme on All-on-Four abutments, screws and prostheses: A three-dimensional finite element study

2020 ◽  
Author(s):  
Nurullah Türker ◽  
Hümeyra Tercanlı Alkış ◽  
Steven J Sadowsky ◽  
Ulviye Şebnem Büyükkaplan
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Good Prognosis ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Group Function ◽  
Occlusal Contact ◽  
Maximum Deformation ◽  
Contact Points ◽  
Von Mises

An ideal occlusal scheme plays an important role in a good prognosis of All-on-Four applications, as it does for other implant therapies, due to the potential impact of occlusal loads on implant prosthetic components. The aim of the present three-dimensional (3D) finite element analysis (FEA) study was to investigate the stresses on abutments, screws and prostheses that are generated by occlusal loads via different occlusal schemes in the All-on-Four concept. Three-dimensional models of the maxilla, mandible, implants, implant substructures and prostheses were designed according to the All-on-Four concept. Forces were applied from the occlusal contact points formed in maximum intercuspation and eccentric movements in canine guidance occlusion (CGO), group function occlusion (GFO) and lingualized occlusion (LO). The von Mises stress values for abutment and screws and deformation values for prostheses were obtained and results were evaluated comparatively. It was observed that the stresses on screws and abutments were more evenly distributed in GFO. Maximum deformation values for prosthesis were observed in the CFO model for lateral movement both in the maxilla and mandible. Within the limits of the present study, GFO may be suggested to reduce stresses on screws, abutments and prostheses in the All-on-Four concept.

The Study on Objective Evaluation of Occlusal Contact. Part. 1. The Similarity and Quantity of Each Tooth and Occlusal Patterns (Intercuspal Position).

1997 ◽  
Vol 41 (5) ◽  
pp. 822-829
Author(s):  
Makoto Takenaka ◽  
Yutaka Ito ◽  
Shigemitsu Sakuma ◽  
Yoshinori Mukaida ◽  
Kentaro Nakamura ◽  
...  
Keyword(s):  
Objective Evaluation ◽  
Occlusal Contact ◽  
Contact Part

A clinical study on the prognosis of complete denture wearers covering 10 years. Part II. Occlusal contact area.

1988 ◽  
Vol 32 (4) ◽  
pp. 767-773
Author(s):  
Nobuaki Shiina ◽  
Yoshiaki Okikura ◽  
Kaoru Iwase ◽  
Hiroaki Hirata ◽  
Yutaka Miida ◽  
...  
Keyword(s):  
Clinical Study ◽  
Contact Area ◽  
Complete Denture ◽  
Occlusal Contact

(Preprint)

2018 ◽  
Author(s):  
Dr Malathi Dayalan ◽  
Dr Sudeshna Sharma ◽  
Dr Shweta Poovani ◽  
Dr Saher Altaf
Keyword(s):  
Myofascial Pain ◽  
Mouth Opening ◽  
Masticatory Muscles ◽  
Matched Pair ◽  
Masticatory Muscle ◽  
Muscle Disorders ◽  
Occlusal Contact ◽  
Group I ◽  
Group Ii

BACKGROUND Masticatory system is a complex functional unit, primarily engaged in chewing, swallowing and breathing functions, and some parts are involved in taste recognition and determination of food consistency. Sophisticated functional performances of speech and emotional expressions are specifically human qualities. Irregularities in occlusion appears to be the precipitating factor in the pathogenesis of myofascial pain dysfunction syndrome. Tek- Scan III records the bite length, number, distribution, timing, duration and the relative force of each tooth contact. It also records the sequence of occlusal contacts in terms of time and the associated force with each occlusal contact. The aim of this study was to treat masticatory muscle disorders with occlusal equilibration, and compare the efficacy of treatment outcomes between selective grinding and stabilization splints using Tek-Scan III. OBJECTIVE Objective of this study was to compare the efficacy of occlusal equilibration achieved through selective griding and stabilization splints using Tek-Scan III. METHODS In this in vivo study, 40 patients with masticatory muscle disorders were selected based on the inclusion and exclusion criteria. The occlusal discrepancies were analyzed using Tek-Scan III. The selected 40 subjects were then randomly divided into 2 groups based on the treatment they recieved; Group I – Selective grinding group (20) and Group II – Stabilization splint group (20). Comparison of pre-treatment and post treatment results were evaluated in terms of pain, mouth opening, left and right side force percentage as recorded through Tek-Scan III and reduction of disclusion time. Statistical analysis was carried out with Kolmogorov Smirnov test, Wilcoxon matched pair test and Mann-Whitney U test. RESULTS Wilcoxon matched pairs test demonstrated that there was statistically significant results ( p = 0.0007) in both the groups for reduction of disclusion time, elimination of pain and improved mouth opening. Patients in Group I showed better results as compared to Group II in terms of disclusion time, pain and mouth opening. CONCLUSIONS Occlusal equilibration brought about by reducing the disclusion time using the Tek- Scan III reduced the symptoms of pain in masticatory muscles. Patients in group I (Selective grinding) however showed better results when compared to patients in group II (Stabilization splints).

scholarly journals Maxillary expansion or contraction and occlusal contact adjustment: effectiveness of current aligner treatment

2021 ◽  
Author(s):  
Ulrike Riede ◽  
Sandra Wai ◽  
Sabrina Neururer ◽  
Bärbel Reistenhofer ◽  
Gregor Riede ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Measuring Method ◽  
Rank Test ◽  
Treatment Goals ◽  
Maxillary Expansion ◽  
Clinical Model ◽  
Occlusal Contact ◽  
Planning Software ◽  
Signed Rank ◽  
Signed Rank Test

Abstract Objectives To evaluate the precision of aligner (Invisalign®) treatment with the current material (SmartTrack®) in achieving expansion or contraction of the maxilla and occlusal contacts as simulated in the proprietary planning software (ClinCheck®, CC). Materials and methods Thirty patients thus treated were retrospectively evaluated. Four maxillary models were analyzed per patient: a pretreatment model, a scan-based CC model, a posttreatment clinical model, and a CC model reflecting the treatment outcome as initially simulated. Thirteen transverse parameters were measured on each model separately by two investigators. Occlusal contacts were also analyzed. Results The measuring method was validated by both investigators arriving at similar results for the effectiveness by which the simulated treatment goals had been clinically achieved. Significant differences (p < 0.05; Wilcoxon signed-rank test) were observed for transfer precision from the casts to the planning software and between the simulated and clinical outcomes. Intense occlusal contacts in the simulations materialized less common (≈ 2%) than ideal contacts (≈ 60%) in the clinical outcomes. Conclusions The effectiveness of achieving the simulated transverse goals was 45% and was generally not found to be better with SmartTrack® than with the previously used Ex30® material. Out of 100 simulated occlusal contacts, 40 will never materialize, and achieving around 60 will adequately ensure a clinically favorable contact pattern. Clinical relevance With the caveat that any overcorrection will to some extent reduce the precision, it seems perfectly possible to make deliberate use of overcorrection in current aligner therapies for transverse maxillary expansion or contraction.

Initial Change in the Occlusal Force and Occlusal Contact Area Following Single Molar Implant Restoration

2021 ◽  
Vol 36 (6) ◽  
pp. 1139-1146
Author(s):  
Ye-Jin Kim ◽  
Kyung-Ho Ko ◽  
Yoon-Hyuk Huh ◽  
Lee-Ra Cho ◽  
Chan-Jin Park
Keyword(s):  
Contact Area ◽  
Occlusal Force ◽  
Occlusal Contact ◽  
Implant Restoration ◽  
Initial Change

Analysis of occlusal contact and guidance pattern during maximal intercuspal position and protrusive movement

2013 ◽  
Vol 51 (3) ◽  
pp. 199
Author(s):  
Jiyeon Kim ◽  
Kang-Hyun Kim ◽  
Kwantae Noh ◽  
Hyeong-Seob Kim ◽  
Yi-Hyung Woo ◽  
...  
Keyword(s):  
Occlusal Contact
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