Academic literature on the topic 'Semi-adjustable articulator'

ABSTRACT Aim The present study was aimed to assess the transferability of occlusal plane (OP) orientation from the patient to the articulators with the help of two different facebow systems and evaluated with a gold standard. Materials and methods Twenty dentate patients were selected for the study. Two semi-adjustable arcon articulators that are Hanau Wide® Vue using SpringBow and Whip Mix® using quickmount facebow were used in the study. Mean angle between OP to horizontal reference plane obtained from Hanau Wide Vue articulator system (SpringBow using Orbitale as anterior reference point) and Whip Mix articulator system (quickmount facebow using nasion as anterior reference point) was tabulated. These values obtained were further compared with each other and evaluated against cephalometric evidence, which was considered as the gold standard for the study. Descriptive statistics, analysis of variance, Scheffe post hoc analysis for group comparison, and level of significance (P) was calculated using Statistical Package for the Social Sciences version 16 (IBM, New York, USA) software program. Results Intragroup comparison of mean angle OP values showed highly significant difference (p = 0.000). Comparison between Hanau Wide Vue articulator system and Whip Mix articulator system showed statistically highly significant with a mean difference of 10.51° with Hanau system values being lower than Whip Mix system. Difference between Hanau system and cephalometric values were statistically significant with a mean difference of 2.835° and Hanau system consistently recording lower values than cephalometric values. Difference between Whip Mix system and cephalometric values was also statistically significant with a mean difference of 7.680° with group 2 values were on average 7.680° higher than group 3. Conclusion Within the limitations of this study, the Hanau system and Whip Mix system showed significant difference in reproduction of angle between OP and horizontal reference plane. Hanau articulator system showed closer values to that of cephalometric values in comparison with Whip Mix articulator system. Clinical significance Orientation of the maxillary cast in an articulator is a crucial part of several techniques used in dentistry. Orientation of maxillary cast in the articulator acts as a baseline from which further steps for occlusal rehabilitation of the patients are carried out. Recording and transferring of the occlusal cant to articulators require facebow. How to cite this article Anusha CV, Singh AA, Sam G, Sangwan B, Shilpa M, Kamath AG. Evaluation of Two Facebow/Semi-adjustable Articulator Systems for Orienting Maxillary Cast on Articulators: A Pilot Study. J Contemp Dent Pract 2016;17(4):327-330

Introduction: The use of second generation semi-adjustable articulators for the reproduction of the mandibular kinematic often proves to be a technical and time constraint for the dentist. Therefore, its use, however essential within the dental office, is frequently forsaken. Materials and methods: The possibility of reproducing complex anatomical forms using rapid prototyping technologies can induce a more attractive and effective use of such a modified articulator. Results & Conclusion: Indeed, these replicas substitute for mechanical adjustments and thereby make the metrology on the patient an unnecessary element, both sources of the approximation of the kinematic. The aim of this study is to report on designing and manufacturing a semi-physiological articulator and on its pertinence through the comparison of the mandibular kinematics movement reproducibility on the two types of articulator.

Background: Complete denture is a removable denture replacing all the missing teeth and tissue in the upper jaw and lower jaw. The purpose of making complete denture is to improve the function of chewing, aesthetic functions and maintaining patient's oral health. Complete edentulous ridge will causes resorption, until it become flat. A flat ridge is associated with difficulties in providing successful dentures. Purpose: This case report aims to reported the treatment of complete edentulous maxillary and mandibular with a flat ridge using semi-adjustable articulator. Case(s): A 63-year-old male patient visited the Prosthodontic Clinic of Dentistry Faculty, Airlangga University with complete edentulous maxillary and mandibular, also flat ridge in his mandibular. Case Management: This case is using semi-adjustable articulator (Stratos 300). Some accessories in Stratos 300 were used in this case, such as centric tray to help determine the height of bite, gnathometer M to help the process of functional impression and bite block, also tooth arrangement with 2D templates. Conclusion: The use of semi-adjustable articulator (Stratos 300) could restore stomatognathic function in accordance with patient’s condition.

Background & Objectives:The study was conducted with objective to compare the horizontal condylar guidance (HCG) obtained by protrusive interocclusal records and panoramic radiographic images in completely edentulous patients.Materials & Methods:The horizontal condylar guidance was measured in 25 completely edentulous patients by protrusive interocclusal records using zinc oxide eugenol paste through a face bow transfer (HanauTM Spring bow, Whip Mix Corporation, USA) to a semi-adjustable articulator (HanauTM Wide-Vue Articulator, Whip Mix Corporation, USA). In the same patients, HCG was traced in the panoramic radiograph. The angles formed by the intersection of two lines: Frankfurt’s horizontal plane and posterior slope of articular eminence was measured using protractor to represent the horizontal condylar guidance angle on each side.Results:The mean difference between the horizontal condylar guidance angles values obtained using protrusive interocclusal record and panoramic radiograph was 2.68 degrees and 3.40 degrees for the right and the left side respectively, with the panoramic radiograph values being higher. This difference between the values was found to be highly significant between the two methods for the right side (t = 2.70, p = 0.012) and left side (t = 3.69, p = 0.001). A significant positive correlation was found between the horizontal condylar guidance obtained from protrusive interocclusal record and panoramic radiograph for the right (r = 0.643, p = 0.001) and left sides (r = 0.622, p = 0.001) separately.Conclusion:The panoramic radiographic tracing can be used to calculate the mean horizontal condylar guidance in the completely edentulous patients and these values can be used to programme semi-adjustable articulators avoiding the cumbersome process of obtaining protrusive interocclusal records.

Proper occlusal plane is an essential consideration when multiple long span posterior restorations are designed. The determination of the occlusal plane can have a profound effect on the short and long term success of a restorative case. Purpose of Study. (1) To determine the appropriate occlusal curve for individual patients. (2) To compare the deviation of the clinical occlusal curve with the ideal ones. Materials and Methods. A total of 20 subjects were examined and study models were made of their maxillary and mandibular dentition. Inter-occlusal records were made and the casts were articulated in semiadjustable articulator. An ideal occlusal plane was created. The distance of the farthest cusp tip from the Broadrick curve was measured along the long axis of the tooth for each individual. Paired t-tests were used to compare the findings between subjects and controls. Results. A statistically significant difference P<0.05 was found in the deviation from the Broadrick curve between patients who have lost posterior teeth and the control group who had a full dentition with no missing teeth. Conclusion. Proper utilization of the broadrick flag on a semi-adjustable articulator will allow for a correct determination of the occlusal plane.

Este estudo avaliou a habilidade de duas técnicas, uma convencional e uma de transferência direta do molde, para a montagem do modelo de gesso maxilar no articulador. Um único paciente do sexo feminino, 39 anos, portador de arcada superior de Classe I de Kennedy (desdentado posterior bilateral) foi usado para esta investigação. Foram obtidos 20 modelos de gesso em cada técnica, totalizando 40 montagens nos articuladores. Com o modelo maxilar montado, cada articulador foi fotografado do mesmo lado direito da radiografia em norma lateral da paciente, obtida com o arco facial montado em sua face. As medidas analisadas nos traçados realizados sobre as fotografias e na radiografia, foram obtidas calculando-se o ângulo entre a interseção do plano oclusal da maxila e o plano de referência horizontal (plano de Frankfurt), representado pelo arco facial na radiografia da paciente, comparando-o com o ângulo entre o plano oclusal do modelo de gesso e o ramo superior do articulador em ambas as técnicas, por meio do software UTHSCSA Image Tool. O dados foram submetidos à análise estatística. Os resultados deste estudo demonstraram uma capacidade maior de reprodução daquele ângulo quando uma técnica de transferência direta do molde é usada. Da mesma maneira, foi verificado uma distorção significante na reprodutibilidade dos modelos montados pela técnica convencional.
This study assessed the ability of two techniques to mount the maxillary cast in the articulator, a conventional technique and one of direct transfer of the maxillary arch impression from the patient\'s mouth to the articulator. A single female subject, 39 years old, with a partially edentulous arch, Kennedy´s Class I, was used in this investigation. It was obtained 20 casts in each technique, totaling 40 cast mountings in the articulators. With the maxillary cast mounted, each articulator was photographed in the same right side of the lateral skull cephalometric radiograph of the patient with the face-bow mounted in her face. The measures obtained by the photographic and cephalometric tracings were evaluated by calculating the angle made by the intersection of the maxillary occlusal plane with craniofacial horizontal reference plane (Frankfort´s plane) on the patient´s cephalogram and comparing it with the angle between the occlusal plane of the cast with the upper member of the articulators in both techniques using the UTHSCSA Image Tool computerized program. The measuring data was submitted to the statistical analysis. The results of this study demonstrated a better capacity of reproduction of that angle when a direct transfer technique is used. In the same way, it was found a significant low level of reproducibility in mounting the maxillary cast when a conventional technique is used.

Foi objectivo deste trabalho avaliar várias etapas da montagem e programação de um articulador semi-ajustável e arco facial, de modo a escolher as melhores técnicas numa população de nove pessoas . No arco facial foram avaliadas a posição sentada ou deitada do paciente e o melhor material de registo usado no garfo oclusal, de entre o silicone de adição vinylpolysiloxane e a cera godiva. Na programação do articulador foram avaliados tanto a influência da posição inicial de montagem, RC ou PIM, como o melhor tipo de registo para a programação da guia condilar, registos de excursões laterais ou registos de protrusão. Foram ainda comparados os valores de guia condilar e ângulo de Bennett ob-tidos com os valores de ajuste inicial do articulador (30º de guia condilar e 15º de ângulo de Bennett), de forma a validar ou a descartar a hipótese de não programação individual do articulador. O arco facial foi transferido duas vezes por paciente, com diferentes posições do paciente na cadeira, sentado e deitado, e com dois materiais diferentes no garfo oclusal, cera godiva e vinylpolysiloxane, cuja manipulação foi cronometrada. O modelo mandi-bular de cada paciente foi também montado duas vezes, uma com registo de PIM e outra com registo de RC. Foram efectuadas programações da guia condilar com registos de excursões laterais e com registos de protrusão. Concluiu-se que a posição sentada do paciente é a mais conveniente ao Médico Dentista, e que os matériais de impressão utilizados no garfo têm ambos vantagens e des-vantagens, embora o tempo de manipulação do vinylpolysiloxane tenha sido bastante me-nor (216,2segundos contra 291,8 segundos da cera godiva). Não se verificou diferença significativa na utilização de registos de protrusão ou de excursões laterais para a progra-mação da guia condilar (diferença média de 3,33º). A posição inicial de montagem dos modelos influenciou significativamente a programação da guia condilar, mas não o ân-gulo de Bennett. Já a comparação dos valores obtidos de guia condilar e ângulo de Bennett na amostra (n=9) com a programação inicial fixada no articulador, de 30º de guia condilar e 15º de ângulo de Bennett, mostrou não ser aceitável para a população por não serem valores representativos da mesma.
The objective of this study was to evaluate various stages of assembly and setting of a semi-adjustable articulator and facebow to choose the best techniques in a nine pa-tient population. In facebow assembly were both evaluated sitting and lying position of the patient, and the better occlusal recording material used in the bite fork, between vi-nylpolysiloxane and impression compound. In articulator setting were both evaluated the influence of the initial position assembly, CR or MIP, as the best type of record for pro-gramming the condylar guide, side excursions records or protrusion records. There were also compared the condylar guide values and Bennett angle obtained with the initial set-ting values of the articulator (30º for condylar guidance and 15º for Bennett angle) in order to validate or rule out no individual setting of the articulator. The facebow was assembled twice per patient, with different patient positions in the chair, sitting and lying, and with two different materials in the occlusal fork, impres-sion compound and vinylpolysiloxane, whose handling was timed. The mandibular model of each patient was also mounted twice, once with and MIP registration and other with CR register. The condylar guide was settled with lateral interocclusal records and protru-sion interocclusal records both. It was concluded that the sitting position of the patient was the most convenient to the Dentist, and the impression materials used in the fork have both advantages and disadvantages, although the vinylpolysiloxane handling time has been much lower (216,2 seconds against 291,8 seconds for impression compound). There was no significant dif-ference in the use of protrusion records instead of side excursions to programming the condylar guidance (mean difference 3,33º). The initial position of the assembly signifi-cantly affects programming of the condylar guide but not the Bennett angle. The compar-ison of the values of condylar guidance and Bennett angle in the population (n = 9) with the fixed condylar and Bennett angles at 30º and 15º, respectively, showed not be accepta-ble for not being representative values of the studied population.