Reverse Engineering in Orthodontics

Ghafoor, Hajra

doi:10.5152/turkjorthod.2018.18027

Cited by 8 publications

(3 citation statements)

References 29 publications

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“…Nowadays, with progresses in scanning systems and reverse engineering software for medical applications, 3D anatomical model can be mirrored and then superimposed to evaluate growth/treatment changes through the Euclidean distance measurements or root mean square (RMS) value [ 4 , 8 , 9 ]. Also, quantitative data can be visualized on a 3D color-map providing qualitative assessment of the morphological changes in distinct colors using a technique called ‘surface-to-surface’ analysis.…”

Section: Introductionmentioning

confidence: 99%

Analysis of maxillary asymmetry before and after treatment of functional posterior cross-bite: a retrospective study using 3D imaging system and deviation analysis

Ronsivalle,

Isola,

Lo Re

et al. 2023

Prog Orthod.

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Background Previous evidence would suggest that subjects affected by functional posterior cross-bite (FPXB) present an asymmetric morphology of the maxilla. However, no evidence is available concerning the morphology (symmetry/asymmetry) of the maxilla after treatment of FPXB. This study aimed to investigate the volumetric and morphological changes of the palate in FPXB subjects treated with maxillary expansion and to compare these data with an untreated control group. The study sample included 20 FPXB subjects (mean age 8.1 ± 0.9 years) who underwent maxillary expansion (MEG group) and 21 FPXB subjects (mean age 7.7 ± 1.2 years) as controls (CG group). Digital models were recorded at T0 (first observation) and T1 (12–18 months after first observation) and analyzed to assess palatal volume and symmetry. Deviation analysis and percentage matching calculation were also performed between original and mirrored palatal models for each patient. All data were statistically analyzed for intra-timing, inter-timing and inter-groups assessments. Results At T0, the cross-bite side (CBS) was significantly smaller than non-cross-bite side (non-CBS) in both groups (p < 0.05). At T1, the CBS/non-CBS difference reduced significantly in the MEG group (p < 0.05) while slightly worsened in the CG, however without statistical significance (p > 0.05). The matching percentage of the palatal models improved significantly at T1 in the MEG group (T0 = 74.02% ± 9.8; T1 = 89.95% ± 7.12) (p < 0.05) while no significant differences were recorded in the CG (T0 = 76.36 ± 8.64; 72.18% ± 9.65) (p > 0.05). Limitations The small sample size and the retrospective design of the study represent two limitations that should be overcome with further clinical trials. Conclusions Subjects with FPXB present an asymmetric development of the maxillary vault that improves after reestablishment of normal occlusion following maxillary expansion.

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Section: Introductionmentioning

confidence: 99%

Analysis of maxillary asymmetry before and after treatment of functional posterior cross-bite: a retrospective study using 3D imaging system and deviation analysis

Ronsivalle,

Isola,

Lo Re

et al. 2023

Prog Orthod.

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“…By definition, reverse engineering is used when: (i) the company that offered the product no longer exists, but there is still a demand for it, (ii) the company exists but does not offer the product, only a new version or a new design is offered but it does not meet the customer's expectations, (iii) there is a need to overhaul the technical means that have been put into operation and the CAD models / files are no longer available or in the case of prototype manufacturing, when the ready to use product set of dimensions differs from the original one related to technical documentation (the need to introduce changes to the product design at the stage of product assembly), (iv) a product design CAD models or technical documentation have never been available or have been lost for any reason (computer system failure or so), (v) quality control inspection, (vi) collecting data on masterpieces or museum exhibits, creating virtual tours or reproducing works, (vi) collecting data on spatial layout of objects, e.g. the layout of the production system layout, (vii) product customization to a client anthropometry, (vii) medicine in surgical planning, prosthetics, dental, instrumentation design [2,3,4,5,6,7,12]. In the classic design and construction process, the designer's idea is transformed into a product design, and then into a finished product subject to the This process begins as soon as the need arises and then is defined.…”

Section: Introductionmentioning

confidence: 99%

“…These disadvantages do not have contactless methods. Non-contact methods include, among others, optical, acoustic and electromagnetic methods [6,11,14,1516,17,18,19].…”

Section: Introductionmentioning

confidence: 99%

Design of Corrective Inserts for Patients with Feet Dysfunctions With Reverse Engineering Techniques

Wrześniowska

Grabowik

Sękala

2022

J. Phys.: Conf. Ser.

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These days CAD systems are successfully used in medicine and orthopaedics. Nevertheless, there is still a need of developing of an efficient methodology of their use in case of designing of products which fulfil patient’s requirements according to their disabilities and faulty postures. The cognitive goal of the presented work was disposure to answer the question whether? And how reverse engineering techniques would enable the design of an orthopaedic inserts for people with static flat-valgus foot. The accomplishment of the research problem defined in such a way required working out of solutions for the following detailed research problems: in which way and how to make feet casts to get the precise models – the input data for the 3D scanning process, which 3D scanning technique to apply, taking into consideration available technical means, and how to determine the placement distance of the corrective element for the designed correction insert. The main research areas encompassed inter alia: interviewing the potential patient and examining of their lower limb, making of feet pedographs, creating of feet casts negatives, preparing of casts for 3D scanning, models digitization, and feet inserts design.

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