Masticatory performance, maximum occlusal force, and occlusal contact area in patients with bilaterally missing molars and distal extension removable partial dentures

Abstract Background Implant-supported removable partial dentures (ISRPD) are supported at the free-end region with implant retainers. As implant retainers prevent denture settlement and facilitate denture retention, this is intended to improve masticatory performance in comparison with that of conventional removable dentures. In the present study, we evaluated the effect of implant retainers at the free-end region of removable dentures on occlusal force and masticatory efficiency using a pressure-sensitive sheet, and measured glucose concentration in saliva after mastication with gummy candy. Methods In the present study, the occlusal force and masticatory efficiency of 13 subjects were measured in the following three conditions: without dentures (Condition 1), wearing dentures but not supported by implants (Condition 2), and wearing dentures supported by implants (ISRPD) (Condition 3). All data were statistically compared. Results Regarding the occlusal force, Condition 3 showed significantly higher scores than the other conditions; however, there were no significant differences between Conditions 1 and 2. Regarding the masticatory efficiency, Condition 3 showed significantly higher scores than Condition 2. Conclusions With ISRPD, the occlusal force and masticatory efficiency were increased in comparison with those with conventional removable dentures.

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Masticatory performance is influenced by masticatory muscle activity balance and the cumulative occlusal contact area

Archives of Oral Biology ◽

10.1016/j.archoralbio.2021.105113 ◽

2021 ◽

pp. 105113

Author(s):

Napat Nalamliang ◽

Pattra Sumonsiri ◽

Udom Thongudomporn

Keyword(s):

Contact Area ◽

Muscle Activity ◽

Masticatory Muscle ◽

Masticatory Performance ◽

Occlusal Contact ◽

Masticatory Muscle Activity

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Masticatory Function Assessment of Adult Patients With Cleft Lip and Palate After Orthodontic Treatment

The Cleft Palate-Craniofacial Journal ◽

10.1177/1055665621991733 ◽

2021 ◽

pp. 105566562199173

Author(s):

Sayumi Miura ◽

Hiroshi Ueda ◽

Koji Iwai ◽

Cynthia Concepcion Medina ◽

Eri Ishida ◽

...

Keyword(s):

Contact Area ◽

Orthodontic Treatment ◽

Cleft Lip ◽

Cleft Lip And Palate ◽

Adult Patients ◽

Occlusal Force ◽

Occlusal Contact ◽

Masticatory Function ◽

Masticatory Efficiency ◽

Normal Occlusion

Objective: To determine whether orthodontically treated patients with cleft lip and palate (CLP) possess a different masticatory function than those of untreated patients with normal occlusion. Design: Occlusal contact area, occlusal force, as well as masseter and anterior temporal muscular activity were measured during maximum voluntary clenching (MVC) tests. Mandibular left and right lateral movements during mastication were also assessed. To further elucidate the nature of masticatory function, especially to determine the rate of abnormal jaw movement patterns, a parametric error index (EI) was set. Finally, masticatory efficiency was evaluated with a glucose sensitive measuring device. Participants: Fifteen patients with CLP who had previously completed the orthodontic treatments required to achieve an acceptable and more harmonious occlusion accepted to volunteer in this study along with 21 untreated patients who already possessed a normal occlusion. Results: Patients with CLP showed a significantly lower occlusal force, reduced occlusal contact area, and decreased masticatory efficiency as well as significantly higher EI value when compared with controls. However, there was no significant difference when analyzing muscle activity, although masticatory efficiency was significantly different between the 2 groups. Despite this result, the scores obtained by the patients with CLP in the masticatory efficiency tests were still in the normal range. Conclusions: Orthodontic treatment for adult patients with CLP provides a satisfactory result for the patients’ masticatory ability albeit significantly less ideal compared with untreated patients with normal occlusion.

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