Relationship between maximum bite force and the gonial angle in crossbite

Said, Angélica da Veiga; Takaki, Patricia Barbarini; Vieira, Marilena Manno; Bommarito, Silvana

doi:10.15761/docr.1000215

“…A literature research was performed to identify landmarks and morphometric measurements commonly used for mandibular geometry description [25,[42][43][44][45][46][47][48][49][50][51]. Among those available, only measurements that can be taken easily with classical instruments, as calliper and goniometer, during an external examination were considered in this study.…”

Section: Morphometric Measurementsmentioning

confidence: 99%

Extending the situated function–behaviour–structure framework to human–machine interaction

Filippi

¹

,

Barattin

²

2015

Int J Interact Des Manuf

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One of the main limitations in subject-centred design approach is represented by getting 3D models of the region of interest. Indeed, 3D reconstruction from imaging data (i.e., computed tomography scans) is expensive and exposes the subject to high radiation doses. Statistical Shape Models (SSMs) are mathematical models able to describe the variability associated to a population and allow predicting new shapes tuning model parameters. These parameters almost never have a physical meaning and so they cannot be directly related to morphometric features. In this study a gender-combined SSM model of the human mandible was setup, using Generalised Procrustes Analysis and Principal Component Analysis on a dataset of fifty mandibles. Twelve morphometric features, able to characterise the mandibular bone and readily collectable during external examinations, were recorded and correlated to SSM parameters by a multiple linear regression approach. Then a cross-validation procedure was performed on a control set to determine the combination of features able to minimise the average deviation between real and predicted shapes. Compactness of the SSM and main modes of deformations have been investigated and results consistent with previous works involving a higher number of shapes were found. A combination of five features was proved to characterise predicted shapes minimising the average error. As completion of the work, a male SSM was developed and performances compared with those of the combined SSM. The features-based model here proposed could represent a useful and easy-to-use tool for the generation of 3D customised models within a virtual interactive design environment.

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“…Furthermore, the MBF measurement is very important for the treatment of dysfunction of the stomatognathic system [15]. Their measurement indicates, quantitatively, the muscular efficiency of the dental tightening, thereby enabling effective detection of possible masticatory alterations [16], [17]. Their values are influenced by many factors.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Maximum Biting Force in Two Different Attachment Systems (Bollard vs. Ball and Socket) Retaining Mandibular Overdenture: A Split-mouth Design

Elbeheiry¹,

Mohamed²,

Badr³

2021

Open Access Maced J Med Sci

0

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AIM: The study was conducted to evaluate maximum biting force (MBF) in two different attachment systems (bollard a vs. ball and socket attachment) retaining mandibular overdenture using a split-mouth design. SUBJECTS AND METHODS: Twelve completely edentulous patients received complete dentures and after adaption of the patient with the new denture, 24 implants were inserted in the canine region using two-stage surgical technique and conventional loading protocol. Six patients received the Bollard attachment at the right side and the Ball and Socket at the left side. Moreover, the other six patients received the bollard attachment at the left side and the ball and socket attachment at the right side. Each patient was treated according to split-mouth design. Insertion of each of the attachment type was assigned randomly. Using occlusal force meter instrument, MBF was measured immediately after loading (0), after 6 months (6), and after 12 months (12). RESULTS: Significant statistical differences (p < 0.05) were obvious in in MBF between Attachment (1) and Attachment (2) immediately after loading (0 months), after 6 months (6) and after 12 months (12) follow-up visits. CONCLUSION: Mandibular implant retained overdenture received Bollard abutment that retained with the denture by the help of resilient liner “Retention.sil”* without housing have higher biting forces than mandibular implant retained overdenture with ball abutment where the plastic house was picked up by monomer free self-cured acrylic resin.

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Statistical shape modelling of the human mandible: 3D shape predictions based on external morphometric features

Pascoletti

¹

2022

Int J Interact Des Manuf

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One of the main limitations in subject-centred design approach is represented by getting 3D models of the region of interest. Indeed, 3D reconstruction from imaging data (i.e., computed tomography scans) is expensive and exposes the subject to high radiation doses. Statistical Shape Models (SSMs) are mathematical models able to describe the variability associated to a population and allow predicting new shapes tuning model parameters. These parameters almost never have a physical meaning and so they cannot be directly related to morphometric features. In this study a gender-combined SSM model of the human mandible was setup, using Generalised Procrustes Analysis and Principal Component Analysis on a dataset of fifty mandibles. Twelve morphometric features, able to characterise the mandibular bone and readily collectable during external examinations, were recorded and correlated to SSM parameters by a multiple linear regression approach. Then a cross-validation procedure was performed on a control set to determine the combination of features able to minimise the average deviation between real and predicted shapes. Compactness of the SSM and main modes of deformations have been investigated and results consistent with previous works involving a higher number of shapes were found. A combination of five features was proved to characterise predicted shapes minimising the average error. As completion of the work, a male SSM was developed and performances compared with those of the combined SSM. The features-based model here proposed could represent a useful and easy-to-use tool for the generation of 3D customised models within a virtual interactive design environment.

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Relationship between maximum bite force and the gonial angle in crossbite

Abstract: Introduction: Modification of overjet and posterior crossbite (PC) can affect the maximum bite force (MBF), in turn affecting the shape of the gonial angle (GA).

Cited by 4 publications

References 26 publications

Extending the situated function–behaviour–structure framework to human–machine interaction

Extending the situated function–behaviour–structure framework to human–machine interaction

Evaluation of Maximum Biting Force in Two Different Attachment Systems (Bollard vs. Ball and Socket) Retaining Mandibular Overdenture: A Split-mouth Design

Statistical shape modelling of the human mandible: 3D shape predictions based on external morphometric features

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