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Grande F, Lepidi L, Tesini F, Acquadro A, Valenti C, Pagano S, Catapano S. Investigation of the precision of a novel jaw tracking system in recording mandibular movements: A preliminary clinical study. J Dent 2024; 146:105047. [PMID: 38719134 DOI: 10.1016/j.jdent.2024.105047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/03/2024] [Accepted: 05/05/2024] [Indexed: 05/12/2024] Open
Abstract
OBJECTIVES This preliminary study aimed to clinically assess the precision of a novel optical jaw tracking system (JTS) in registering mandibular movements (MMs) of protrusion and mediotrusion. METHODS Twenty healthy participants underwent recordings using Cyclops JTS (Itaka Way Med) for functional MMs of protrusion and laterotrusion by two trained clinicians. Each subject performed five registrations at different times according to a standardized pattern within one-month period. The angulations of protrusive and mediotrusive functional paths within the first 2 mm from the maximal intercuspal position (MIP) were calculated for each trace, using a data software for angle measurements. Descriptive statistics were used to assess the repeatability of the recordings for each participant and MM. Additionally, inferential statistics were carried out on standard deviation values obtained (α=0.05). RESULTS The overall precision for all the patients was 7.07±3.37° for the protrusion angle, 5.24±2.24° for right laterotrusion and 5.14±3.06° for left laterotrusion angles. The protrusion angle ranged from 3.08° to 13.57°, while the right and left laterotrusion ranged from 1.82° to 9.42° and from 1.58° to 10.59°, respectively. No statistically significant differences were observed between different functional MM types and gender (p > 0.05). CONCLUSIONS Recordings functional MMs of mediotrusion and protrusion using Cyclops JTS showed consistent repeatability, regardless of gender and functional MM type. The results revealed non-negligible variations that may be due to the patients' abilities to precisely reproduce jaw movements or to the operator's ability to consistently connect the kinesiograph. CLINICAL SIGNIFICANCE Capturing functional MMs digitally and importing the data into dental CAD software is essential for virtual waxing in prosthetic rehabilitations to design a functionalized adapted occlusion. Establishing the repeatability of MM recordings by a JTS is a crucial step in better understanding this novel JTS in the market. This process could facilitate the interpretation of cusp angles, aid in CAD dynamic technical modeling, and enhance clinical data communication between clinicians and technicians in a modern workflow.
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Affiliation(s)
- Francesco Grande
- PhD student at Politecnico of Turin, Turin Italy; University of Ferrara, Ferrara Italy.
| | - Luca Lepidi
- Adjunct Professor Gnathology, University of Ferrara, Ferrara Italy
| | | | | | | | - Stefano Pagano
- Chief-Professor Dental Materials, Oral Prosthodontic, University of Perugia, Perugia, Italy
| | - Santo Catapano
- Chief-Professor Dental Materials, Oral Prosthodontic, University of Ferrara, Ferrara, Italy
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Da Silva FP, Dos Santos IM, Carneiro DE, De La Torre Canales G, Sánchez-Ayala A. Effect of artificial eccentric occlusal interferences on masticatory performance: A randomised double-blind clinical trial. J Oral Rehabil 2024; 51:536-545. [PMID: 37964439 DOI: 10.1111/joor.13620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 06/20/2023] [Accepted: 10/27/2023] [Indexed: 11/16/2023]
Abstract
BACKGROUND Occlusal interferences lead to changes in mandibular kinematics to compensate and improve function. However, the effects of different types of eccentric disturbance on the comminution capacity are not known. OBJECTIVE To determine the immediate effect of eccentric occlusal interferences on masticatory performance. METHODS This crossover clinical trial included 12 healthy dentate subjects aged 25.2 ± 3.3 years who were randomly submitted to seven types of occlusal interference: unilateral and bilateral laterotrusive and mediotrusive, protrusive, dummy and control (no interference). The interference forms were planned in a semi-adjustable articulator, fabricated with composite resin and adhered to the mandibular first molars such that subjects' maximum intercuspation was maintained. Masticatory performance and the chewing rate during 20 cycles were evaluated during subjects' comminution of silicone test food under one interference condition per test day; the multiple sieve method was applied to the comminuted particles. The interference was removed upon test completion, and a 1-week washout period was applied between tests. RESULTS Comminuted median particle sizes were larger under unilateral (4.94 ± 0.41 mm) and bilateral (4.81 ± 0.49 mm) laterotrusive, bilateral mediotrusive (4.65 ± 0.50 mm) and protrusive (4.83 ± 0.54 mm) interferences (p < .05) than under the control (4.01 ± 0.52 mm) and dummy (4.18 ± 0.58 mm) conditions (p < .05). Only unilateral and bilateral laterotrusive interferences narrowed the comminuted particle size dispersion (p < .05). The chewing rate did not differ among conditions (p = .1944). CONCLUSION Artificial eccentric interferences had an immediate adverse effect on masticatory performance by resulting in larger comminuted particles. CLINICAL TRIAL REGISTRATION Brazilian Registry of Clinical Trials (RBR-8g5zfg8).
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Affiliation(s)
| | | | | | - Giancarlo De La Torre Canales
- Egas Moniz Center for Interdisciplinary Research (CiiEM), Egas Moniz School of Health & Science, Caparica, Almada, Portugal
- Department of Dental Medicine, Karolinska Institutet, and the Scandinavian Center for Orofacial Neurosciences (SCON), Flemingsberg, Huddinge, Sweden
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Farfán NC, Lezcano MF, Navarro-Cáceres PE, Sandoval-Vidal HP, Martinez-Gomis J, Muñoz L, Marinelli F, Fuentes R. Characterization of Mandibular Border Movements and Mastication in Each Skeletal Class Using 3D Electromagnetic Articulography: A Preliminary Study. Diagnostics (Basel) 2023; 13:2405. [PMID: 37510149 PMCID: PMC10378291 DOI: 10.3390/diagnostics13142405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 07/07/2023] [Accepted: 07/09/2023] [Indexed: 07/30/2023] Open
Abstract
Mandibular movement recording is relevant for the planning and evaluation of mandibular function. These movements can include mandibular border movements (MBM) or mastication. Our objective was to characterize the kinematics of MBM and mastication among skeletal classes I, II, and III in the three spatial planes. A descriptive cross-sectional study was conducted with 30 participants. Instructions were provided on how to form Posselt's envelope and to perform masticatory. After data processing, we obtained numerical values for the areas, trajectories, and ranges of MBM that formed Posselt's envelope and the values for speed, masticatory frequency, and the areas of each masticatory cycle. Significant differences were found in the area of Posselt's envelope in the horizontal plane between skeletal classes I and III and in the range of right laterality between skeletal classes II and III. Mastication showed significant differences in the area of the masticatory cycles in the horizontal plane between classes I and III and between classes II and III. In conclusion, there were differences in MBM and mastication between skeletal classes III and I in the horizontal plane. This study supports the need to establish normal values for mandibular kinematics in skeletal class III.
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Affiliation(s)
- Nicole Constanza Farfán
- Research Center for Dental Sciences (CICO), Dental School, Faculty of Odontology, Universidad de La Frontera, Temuco 4811230, Chile
- Department of Integral Adults Dentistry, Dental School, Faculty of Odontology, Universidad de La Frontera, Temuco 4811230, Chile
| | - María Florencia Lezcano
- Cybernetics Laboratory, Department of Bioengineering, Universidad Nacional de Entre Ríos, Entre Ríos CP E3100, Argentina
| | - Pablo Eliseo Navarro-Cáceres
- Research Center for Dental Sciences (CICO), Dental School, Faculty of Odontology, Universidad de La Frontera, Temuco 4811230, Chile
| | - Héctor Paulo Sandoval-Vidal
- Department of Pediatric Dentistry, Orthodontic Dental School, Faculty of Odontology, Universidad de La Frontera, Temuco 4811230, Chile
| | - Jordi Martinez-Gomis
- Department of Prosthodontics, School of Dentistry, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 Barcelona, Catalonia, Spain
- Oral Health and Masticatory System Group, (Bellvitge Biomedical Research Institute) IDIBELL, L'Hospitalet de Llobregat, 08907 Barcelona, Catalonia, Spain
| | - Loreto Muñoz
- Carrera de Odontología, Facultad de Odontología, Universidad de La Frontera, Temuco 4811230, Chile
| | - Franco Marinelli
- Research Center for Dental Sciences (CICO), Dental School, Faculty of Odontology, Universidad de La Frontera, Temuco 4811230, Chile
| | - Ramón Fuentes
- Research Center for Dental Sciences (CICO), Dental School, Faculty of Odontology, Universidad de La Frontera, Temuco 4811230, Chile
- Department of Integral Adults Dentistry, Dental School, Faculty of Odontology, Universidad de La Frontera, Temuco 4811230, Chile
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Dorado S, Arias A, Jimenez-Octavio JR. Biomechanical Modelling for Tooth Survival Studies: Mechanical Properties, Loads and Boundary Conditions-A Narrative Review. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7852. [PMID: 36363451 PMCID: PMC9657341 DOI: 10.3390/ma15217852] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 11/02/2022] [Accepted: 11/04/2022] [Indexed: 06/16/2023]
Abstract
Recent biomechanical studies have focused on studying the response of teeth before and after different treatments under functional and parafunctional loads. These studies often involve experimental and/or finite element analysis (FEA). Current loading and boundary conditions may not entirely represent the real condition of the tooth in clinical situations. The importance of homogenizing both sample characterization and boundary conditions definition for future dental biomechanical studies is highlighted. The mechanical properties of dental structural tissues are presented, along with the effect of functional and parafunctional loads and other environmental and biological parameters that may influence tooth survival. A range of values for Young's modulus, Poisson ratio, compressive strength, threshold stress intensity factor and fracture toughness are provided for enamel and dentin; as well as Young's modulus and Poisson ratio for the PDL, trabecular and cortical bone. Angles, loading magnitude and frequency are provided for functional and parafunctional loads. The environmental and physiological conditions (age, gender, tooth, humidity, etc.), that may influence tooth survival are also discussed. Oversimplifications of biomechanical models could end up in results that divert from the natural behavior of teeth. Experimental validation models with close-to-reality boundary conditions should be developed to compare the validity of simplified models.
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Affiliation(s)
- Saúl Dorado
- Department of Mechanical Engineering, Escuela Técnica Superior de Ingeniería ICAI, Universidad Pontificia Comillas, 28015 Madrid, Spain
| | - Ana Arias
- Department of Conservative and Prosthetic Dentistry, School of Dentistry, Complutense University, 28040 Madrid, Spain
| | - Jesus R. Jimenez-Octavio
- Instituto de Investigación Tecnológica, Escuela Técnica Superior de Ingeniería ICAI, Universidad Pontificia Comillas, 28015 Madrid, Spain
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Lezcano MF, Dias FJ, Chuhuaicura P, Navarro P, Fuentes R. Symmetry of mandibular movements: A 3D electromagnetic articulography technique applied on asymptomatic participants. J Prosthet Dent 2021; 125:746-752. [DOI: 10.1016/j.prosdent.2020.01.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 01/21/2020] [Accepted: 01/21/2020] [Indexed: 11/25/2022]
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Chuhuaicura P, Lezcano MF, Dias FJ, Fuentes AD, Arias A, Fuentes R. Mandibular border movements: The two envelopes of motion. J Oral Rehabil 2020; 48:384-391. [PMID: 33151578 DOI: 10.1111/joor.13124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 10/26/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND The envelope of motion is a diagrammatic representation of the mandibular border movements. Classically, those movements are carried out eccentrically; starting from the position of maximal intercuspation, the mandible describes an excursion movement until reaching maximal mouth opening. Reverse movements would describe a different path, but up to now concentric development of mandibular border movements has not been considered. Literature states that beyond mandibular border movements limits, no movement is possible. Therefore, it is of great interest to compare both paths-both envelopes of motion-and define the actual limits of mandibular movement. OBJECTIVE The aim of this study was to compare the geometric characteristics of mandibular border movements carried out eccentrically and concentrically by healthy subjects. METHODS Sixteen individuals aged between 18 and 27 years, molar class I and with no temporomandibular disorders, participated in the study. Eccentric and concentric mandibular movements were recorded using a 3D electromagnetic articulograph. Data were processed with computational scripts developed in MATLAB. Maximum mouth opening, trajectories, displacement ranges, polygon areas and chewing cycle area/ mandibular border movements area ratio were analysed. RESULTS The frontal plane showed significant differences in all the parameters evaluated. Higher values were registered in the concentric area of the border movement envelope (P = .008) and in the trajectories on both sides. Statistical differences were observed in polygon areas (P = .006) in the sagittal plane and right ranges (P = .046) in the horizontal plane. CONCLUSION Concentric mandibular movements revealed significant differences in three-dimensional trajectories in the frontal plane.
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Affiliation(s)
- Priscila Chuhuaicura
- Dental School, Research Centre in Dental Sciences (CICO), Universidad de La Frontera, Temuco, Chile.,Department of Integral Adults Dentistry, Dental School, Universidad de La Frontera, Temuco, Chile
| | - María Florencia Lezcano
- Dental School, Research Centre in Dental Sciences (CICO), Universidad de La Frontera, Temuco, Chile.,Department of Integral Adults Dentistry, Dental School, Universidad de La Frontera, Temuco, Chile.,Laboratorio de Cibernética, Departamento de Bioingeniería, Facultad de Ingeniería, Universidad Nacional de Entre Ríos, Entre Ríos, Argentina
| | - Fernando José Dias
- Dental School, Research Centre in Dental Sciences (CICO), Universidad de La Frontera, Temuco, Chile.,Department of Integral Adults Dentistry, Dental School, Universidad de La Frontera, Temuco, Chile
| | - Aler Daniel Fuentes
- Institute for Research in Dental Sciences, Faculty of Dentistry, Universidad de Chile, Santiago, Chile.,Oral Physiology Laboratory, Faculty of Medicine, Biomedical Sciences Institute, Universidad de Chile, Santiago, Chile
| | - Alain Arias
- Dental School, Research Centre in Dental Sciences (CICO), Universidad de La Frontera, Temuco, Chile.,Department of Integral Adults Dentistry, Dental School, Universidad de La Frontera, Temuco, Chile
| | - Ramón Fuentes
- Dental School, Research Centre in Dental Sciences (CICO), Universidad de La Frontera, Temuco, Chile.,Department of Integral Adults Dentistry, Dental School, Universidad de La Frontera, Temuco, Chile
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Accuracy and Reliability of AG501 Articulograph for Mandibular Movement Analysis: A Quantitative Descriptive Study. SENSORS 2020; 20:s20216324. [PMID: 33171901 PMCID: PMC7664251 DOI: 10.3390/s20216324] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/15/2020] [Accepted: 10/20/2020] [Indexed: 11/17/2022]
Abstract
Electromagnetic articulography (EMA) have been mostly employed to study articulatory movements of speech. This technology appears to be very promising for studying mandibular movements within the field of dentistry. However, there are no studies reporting the validity of EMA for such purpose. The aim of this study is to assess accuracy and reliability of Carstens three-dimensional EMA AG501 in order to validate its use for mandibular movement analysis in dentistry. A set of tests was conducted attaching 16 sensors to a rotating rigid structure placed inside the measurement area. Another set of tests were conducted using a mouth anatomical model with human-like articulatory behaviour. A function of the EMA system called “head correction” was applied to normalize the data of every recording. The system reliability was higher at the centre of the measurement area and decreased toward the edges. Dispersion was greater for raw data than for normalized data. Bland-Altman analysis of agreement between the AG501 and a millimetre ruler used to measure the distance between the sensors revealed limits of agreement between 0.5 mm and −0.9 mm. The results suggest that EMA AG501 is valid for three-dimensional analysis of mandibular biomechanics allowing natural movements.
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