Masticatory function—a review of the literature

Bates, J.F.; Stafford, G.D.; Harrison, Alan

doi:10.1111/j.1365-2842.1976.tb00929.x

Cited by 256 publications

(40 citation statements)

References 39 publications

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“…The diameter of the identer was 6 mm, therefore comparable to a molar cusp 28 . The applied load was 98 N, which adequatley simulates the physiological biting force of posterior teeth 51, 52 . The simulated five-year ageing of the all-ceramic partial coverage restorations had no effect on the marginal fit.…”

Section: Discussionmentioning

confidence: 99%

Marginal and internal fit of heat pressed versus CAD/CAM fabricated all-ceramic onlays after exposure to thermo-mechanical fatigue

Guess

Vagkopoulou

Zhang

et al. 2014

Journal of Dentistry

102

116

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Objectives The aim of the study was to evaluate the marginal and internal fit of heat-pressed and CAD/CAM fabricated all-ceramic onlays before and after luting as well as after thermo-mechanical fatigue. Materials and Methods Seventy-two caries-free, extracted human mandibular molars were randomly divided into three groups (n=24/group). All teeth received an onlay preparation with a mesio-occlusal-distal inlay cavity and an occlusal reduction of all cusps. Teeth were restored with heat-pressed IPS-e.max-Press* (IP, *Ivoclar-Vivadent) and Vita-PM9 (VP, Vita-Zahnfabrik) as well as CAD/CAM fabricated IPS-e.max-CAD* (IC, Cerec 3D/InLab/Sirona) all-ceramic materials. After cementation with a dual-polymerizing resin cement (VariolinkII*), all restorations were subjected to mouth-motion fatigue (98N, 1.2 million cycles; 5°C/55°C). Marginal fit discrepancies were examined on epoxy replicas before and after luting as well as after fatigue at 200x magnification. Internal fit was evaluated by multiple sectioning technique. For the statistical analysis, a linear model was fitted with accounting for repeated measurements. Results Adhesive cementation of onlays resulted in significantly increased marginal gap values in all groups, whereas thermo-mechanical fatigue had no effect. Marginal gap values of all test groups were equal after fatigue exposure. Internal discrepancies of CAD/CAM fabricated restorations were significantly higher than both press manufactured onlays. Conclusions Mean marginal gap values of the investigated onlays before and after luting as well as after fatigue were within the clinically acceptable range. Marginal fit was not affected by the investigated heat-press versus CAD/CAM fabrication technique. Press fabrication resulted in a superior internal fit of onlays as compared to the CAD/CAM technique. Clinical Relevance Clinical requirements of 100 μm for marginal fit were fulfilled by the heat-press as well as by the CAD/CAM fabricated all-ceramic onlays. Superior internal fit was observed with the heat-press manufacturing method. The impact of present findings on the clinical long-term behaviour of differently fabricated all-ceramic onlays warrants further investigation.

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Section: Discussionmentioning

confidence: 99%

Marginal and internal fit of heat pressed versus CAD/CAM fabricated all-ceramic onlays after exposure to thermo-mechanical fatigue

Guess

Vagkopoulou

Zhang

et al. 2014

Journal of Dentistry

102

116

View full text Add to dashboard Cite

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“…The MBF is regulated by the nervous, muscular and skeletal systems [2]. Exertion of a sufficient bite force is an indicator of normal masticatory function [3]. Therefore, many clinicians suggest MBF measurement as a useful method for understanding masticatory function in patients with stomatognatic system disorders [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of orofacial function in temporomandibular disorder patients after low-level laser therapy

Röhlig

Kıpırdı

Baca

et al. 2012

Acta Odontologica Scandinavica

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“…In the study by Truninger et al,24 which reflected the simulation of loading condition in anterior portion, oblique force was loaded to abutment in 30 angles to the long axis of the crown. Bates et al25 reported that the maximum force of mastication in the first human molar was 300 - 500 N. Richter26 reported that the vertical load in molar and premolar was 120 - 150 N. In our study, we designed the loading position to be 3 mm distant from the centre of the crown; therefore, this experimental design simulated the lateral masticatory force. Although the force loaded in the current study was less than the average masticatory force reported in the literature, it was believed to sufficiently simulate the intraoral environment by reconstructing the dynamic intraoral masticatory forces using the chewing simulator.…”

Section: Discussionmentioning

confidence: 97%

Evaluation of stability of interface between CCM (Co-Cr-Mo) UCLA abutment and external hex implant

et al. 2016

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PURPOSEThe purpose of this study is to evaluate the stability of interface between Co-Cr-Mo (CCM) UCLA abutment and external hex implant.MATERIALS AND METHODSSixteen external hex implant fixtures were assigned to two groups (CCM and Gold group) and were embedded in molds using clear acrylic resin. Screw-retained prostheses were constructed using CCM UCLA abutment and Gold UCLA abutment. The external implant fixture and screw-retained prostheses were connected using abutment screws. After the abutments were tightened to 30 Ncm torque, 5 kg thermocyclic functional loading was applied by chewing simulator. A target of 1.0 × 106 cycles was applied. After cyclic loading, removal torque values were recorded using a driving torque tester, and the interface between implant fixture and abutment was evaluated by scanning electronic microscope (SEM). The means and standard deviations (SD) between the CCM and Gold groups were analyzed with independent t-test at the significance level of 0.05.RESULTSFractures of crowns, abutments, abutment screws, and fixtures and loosening of abutment screws were not observed after thermocyclic loading. There were no statistically significant differences at the recorded removal torque values between CCM and Gold groups (P>.05). SEM analysis revealed that remarkable wear patterns were observed at the abutment interface only for Gold UCLA abutments. Those patterns were not observed for other specimens.CONCLUSIONWithin the limit of this study, CCM UCLA abutment has no statistically significant difference in the stability of interface with external hex implant, compared with Gold UCLA abutment.

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Masticatory function—a review of the literature

Cited by 256 publications

References 39 publications

Marginal and internal fit of heat pressed versus CAD/CAM fabricated all-ceramic onlays after exposure to thermo-mechanical fatigue

Marginal and internal fit of heat pressed versus CAD/CAM fabricated all-ceramic onlays after exposure to thermo-mechanical fatigue

Evaluation of orofacial function in temporomandibular disorder patients after low-level laser therapy

Evaluation of stability of interface between CCM (Co-Cr-Mo) UCLA abutment and external hex implant

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