The History of Articulators: The Contributions of Rudolph L. Hanau and His Company—Part II

Engelmeier, Robert L.; Belles, Donald M.; Starcke, Edgar N.

doi:10.1111/jopr.12448

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…William Earnest Walker (1856), developed the “clinometer”, the first example of kinematic facebow to reproduce condylar inclination, and the first semi adjustable articulator. Gysi-Muller (1896–1899) constructed an articulator mimicking the form of the condyle and glenoid fossa [ 3 , 4 ]. During the first half of the XX century articulators had a rapid development (Table 1 ) reproducing more and more accurately the individual border movements.…”

Section: Introductionmentioning

confidence: 99%

Individual mandibular movement registration and reproduction using an optoeletronic jaw movement analyzer and a dedicated robot: a dental technique

et al. 2020

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Background Fully adjustable articulators and pantographs record and reproduce individual mandibular movements. Although these instruments are accurate, they are operator-dependant and time-consuming. Pantographic recording is affected by inter and intra operator variability in the individuation of clinical reference points and afterwards in reading pantographic recording themselves. Finally only border movements can be reproduced. Methods Bionic Jaw Motion system is based on two components: a jaw movement analyzer and a robotic device that accurately reproduces recorded movements. The jaw movement analyzer uses an optoelectronic motion system technology made of a high frequency filming camera that acquires 140frames per second and a custom designed software that recognizes and determines the relative distance at each point in time of markers with known geometries connected to each jaw. Circumferential modified retainers connect markers and do not cover any occlusal surfaces neither obstruct occlusion. The recording process takes 5 to 10 s. Mandibular movement performance requires six degrees of freedom of movement, 3 rotations and 3 translations. Other robots are based on the so-called delta mechanics that use several parallel effectors to perform desired movements in order to decompose a complex trajectory into multiple more simple linear movements. However, each parallel effector introduces mechanical inter-component tolerances and mathematical transformations that are required to transform a recorded movement into the combination of movements to be performed by each effector. Bionic Jaw Motion Robot works differently, owing to three motors that perform translational movements and three other motors that perform rotations as a gyroscope. This configuration requires less mechanical components thus reducing mechanical tolerances and production costs. Both the jaw movement analyzer and the robot quantify the movement of the mandible as a rigid body with six degrees of freedom. This represents an additional advantage as no mathematical transformation is needed for the robot to reproduce recorded movements. Results Based on the described procedure, Bionic Jaw Motion provide accurate recording and reproduction of maxillomandibular relation in static and dynamic conditions. Conclusion This robotic system represents an important advancement compared to available analogical and digital alternatives both in clinical and research contexts for cost reduction, precision and time saving opportunities.

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Section: Introductionmentioning

confidence: 99%

Individual mandibular movement registration and reproduction using an optoeletronic jaw movement analyzer and a dedicated robot: a dental technique

et al. 2020

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Articulator Application in Orthodontic Diagnostics

Hutovska

Kuroiedova

2022

Wiad Lek

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The aim: The purpose of the study was to determine the indications for the use of articulator in orthodontics based on the results of the analysis of scientific and foreign literature. Materials and methods: 23 scientific sources were selected, from more than 11 countries over the past 39 years (1981 – 2020) devoted to the use of orthodontics articula¬tors. As a result of processing 23 key international scientific papers on the use of articulators in orthodontics, we can talk about three areas of opinion regarding this problem. Conclusions: To sum up 30.34% of authors consider the articulator to be an obligatory orthodontist’s tool for correct diagnosis. The idea of 34.78% of specialists is that the articulator cannot simulate the physiology of the TMJ – therefore, it is more a source of additional errors than an assistant in the orthodontic diagnostics. The rest of the scientists (34.78%) agree that it is advisable to use the articulator selectively – namely, if the doctor deals with “complex” orthodontic pathologies.

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The History of Articulators: The Contributions of Rudolph L. Hanau and His Company—Part II

Cited by 2 publications

References 7 publications

Individual mandibular movement registration and reproduction using an optoeletronic jaw movement analyzer and a dedicated robot: a dental technique

Individual mandibular movement registration and reproduction using an optoeletronic jaw movement analyzer and a dedicated robot: a dental technique

Articulator Application in Orthodontic Diagnostics

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