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Nuytens P, Grande F, Li J, Lepidi L. Maxillomandibular relationship and virtual facebow integration in complete-arch intraoral implant scan: A novel clinical technique. J Prosthodont 2024. [PMID: 38507286 DOI: 10.1111/jopr.13840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 03/01/2024] [Indexed: 03/22/2024] Open
Abstract
This clinical report introduces a novel clinical technique to create a 3D virtual patient for transferring the edentulous maxillary arch position with maxillomandibular relationship by using a facial scan device and an intraoral scanner and omitting CBCT imaging.
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Affiliation(s)
- Philippe Nuytens
- Department of Reconstructive Dentistry, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Francesco Grande
- Department of Prosthodontics, University of Ferrara, Ferrara, Italy
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy
| | - Junying Li
- Department of Biologic and Materials Sciences & Prosthodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Luca Lepidi
- Department of Prosthodontics, University of Ferrara, Ferrara, Italy
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Feng Y, Zhan L, Sun X, Li J, Liu W. A fully digital workflow to register maxillomandibular relation using a jaw motion tracer for fixed prosthetic rehabilitation: A technical report. J ESTHET RESTOR DENT 2023; 35:1068-1076. [PMID: 37132534 DOI: 10.1111/jerd.13058] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/28/2023] [Accepted: 04/12/2023] [Indexed: 05/04/2023]
Abstract
OBJECTIVE This technique aimed to describe a fully digital workflow to register maxillomandibular relation for fixed prosthetic rehabilitation. CLINICAL CONSIDERATIONS Mandibular kinematics could be reproduced in a four-dimensional (4D) virtual patient based on the intraoral scan, facial scan, cone beam computed tomography, and jaw motion trajectory, which helped record centric relation and determine a proper occlusal vertical dimension in a virtual environment. The therapeutic position could be exported directly to the dental computer-aided design software for digital waxing design with a facial scan. The 4D virtual patient was also used to verify the functional and esthetic outcomes of provisional restorations. CONCLUSIONS This novel approach digitized the process of determination, delivery, and double-check of maxillomandibular relation, thus contributing to the establishment of a completely digital workflow for fixed prosthetic rehabilitation. CLINICAL SIGNIFICANCE Registration of maxillomandibular relation, including centric relation and occlusal vertical dimension is critical to the success of prosthetic rehabilitation. Traditional procedures are complex and time-consuming, and heavily rely on the clinical experience of dentists. A fully digital approach to creating a 4D virtual patient and registering the maxillomandibular relation is established, which guides to determine a proper occlusal vertical dimension in centric relation. Digital delivery and double-check can simplify the conventional procedure and ensure that the determined maxillomandibular relation is reliable.
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Affiliation(s)
- Yue Feng
- Department of Prosthodontics, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Tongji University, Shanghai, China
| | - Linglu Zhan
- Department of Prosthodontics, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Tongji University, Shanghai, China
| | - Xinrong Sun
- Department of Prosthodontics, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Tongji University, Shanghai, China
| | - Junying Li
- Department of Biologic and Materials Sciences & Prosthodontics, The University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Weicai Liu
- Department of Prosthodontics, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Tongji University, Shanghai, China
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Mehta SB, Banerji S, Crins L, Opdam N, Loomans BAC. The longevity of tooth-coloUred materials used for restoration of tooth wear: an evidence-based approach. Prim Dent J 2023; 12:43-53. [PMID: 37705477 DOI: 10.1177/20501684231193595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
Patients with tooth wear are commonly encountered in general dental practice. When indicated, restorative rehabilitation is often accompanied by a request from the patient for an aesthetic, tooth-coloured outcome. This article seeks to provide an evidence-based approach, focussing on the longevity of the materials which can be used for the restorative treatment of tooth wear, as well as their modes of failure and observed performance.
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Affiliation(s)
- Shamir B Mehta
- Shamir B. Mehta BDS, BSc MClinDent (Prosthodontics), PhD Dip. FFGDP(UK), FCGDent, FDSRCS(Eng), FDSRCPS(Glas), FDFTEd Professor of Aesthetic Dentistry, College of Medicine and Dentistry/Ulster University; Visiting Professor Radboud University Medical Centre; Senior Clinical Teacher, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, UK
- Subir Banerji BDS, MClinDent (Prosthodontics), PhD, FDS, RCPS(Glasg), FCGDent, FICD Programme Director MSc Aesthetic Dentistry, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, UK; Associate Professor, Department of Prosthodontics, Melbourne Dental School, The University of Melbourne, Australia
- Luuk Crins DDS PhD candidate, Department of Dentistry, Radboud University Medical Centre, Nijmegen, the Netherlands
- Niek Opdam DDS, PhD Associate Professor in Restorative Dentistry and Cariology, Radboud University Medical Centre, Nijmegen, the Netherlands
- Bas A. C. Loomans DDS, PhD Professor in Oral Function and Restorative Dentistry, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Subir Banerji
- Shamir B. Mehta BDS, BSc MClinDent (Prosthodontics), PhD Dip. FFGDP(UK), FCGDent, FDSRCS(Eng), FDSRCPS(Glas), FDFTEd Professor of Aesthetic Dentistry, College of Medicine and Dentistry/Ulster University; Visiting Professor Radboud University Medical Centre; Senior Clinical Teacher, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, UK
- Subir Banerji BDS, MClinDent (Prosthodontics), PhD, FDS, RCPS(Glasg), FCGDent, FICD Programme Director MSc Aesthetic Dentistry, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, UK; Associate Professor, Department of Prosthodontics, Melbourne Dental School, The University of Melbourne, Australia
- Luuk Crins DDS PhD candidate, Department of Dentistry, Radboud University Medical Centre, Nijmegen, the Netherlands
- Niek Opdam DDS, PhD Associate Professor in Restorative Dentistry and Cariology, Radboud University Medical Centre, Nijmegen, the Netherlands
- Bas A. C. Loomans DDS, PhD Professor in Oral Function and Restorative Dentistry, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Luuk Crins
- Shamir B. Mehta BDS, BSc MClinDent (Prosthodontics), PhD Dip. FFGDP(UK), FCGDent, FDSRCS(Eng), FDSRCPS(Glas), FDFTEd Professor of Aesthetic Dentistry, College of Medicine and Dentistry/Ulster University; Visiting Professor Radboud University Medical Centre; Senior Clinical Teacher, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, UK
- Subir Banerji BDS, MClinDent (Prosthodontics), PhD, FDS, RCPS(Glasg), FCGDent, FICD Programme Director MSc Aesthetic Dentistry, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, UK; Associate Professor, Department of Prosthodontics, Melbourne Dental School, The University of Melbourne, Australia
- Luuk Crins DDS PhD candidate, Department of Dentistry, Radboud University Medical Centre, Nijmegen, the Netherlands
- Niek Opdam DDS, PhD Associate Professor in Restorative Dentistry and Cariology, Radboud University Medical Centre, Nijmegen, the Netherlands
- Bas A. C. Loomans DDS, PhD Professor in Oral Function and Restorative Dentistry, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Niek Opdam
- Shamir B. Mehta BDS, BSc MClinDent (Prosthodontics), PhD Dip. FFGDP(UK), FCGDent, FDSRCS(Eng), FDSRCPS(Glas), FDFTEd Professor of Aesthetic Dentistry, College of Medicine and Dentistry/Ulster University; Visiting Professor Radboud University Medical Centre; Senior Clinical Teacher, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, UK
- Subir Banerji BDS, MClinDent (Prosthodontics), PhD, FDS, RCPS(Glasg), FCGDent, FICD Programme Director MSc Aesthetic Dentistry, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, UK; Associate Professor, Department of Prosthodontics, Melbourne Dental School, The University of Melbourne, Australia
- Luuk Crins DDS PhD candidate, Department of Dentistry, Radboud University Medical Centre, Nijmegen, the Netherlands
- Niek Opdam DDS, PhD Associate Professor in Restorative Dentistry and Cariology, Radboud University Medical Centre, Nijmegen, the Netherlands
- Bas A. C. Loomans DDS, PhD Professor in Oral Function and Restorative Dentistry, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Bas A C Loomans
- Shamir B. Mehta BDS, BSc MClinDent (Prosthodontics), PhD Dip. FFGDP(UK), FCGDent, FDSRCS(Eng), FDSRCPS(Glas), FDFTEd Professor of Aesthetic Dentistry, College of Medicine and Dentistry/Ulster University; Visiting Professor Radboud University Medical Centre; Senior Clinical Teacher, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, UK
- Subir Banerji BDS, MClinDent (Prosthodontics), PhD, FDS, RCPS(Glasg), FCGDent, FICD Programme Director MSc Aesthetic Dentistry, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, UK; Associate Professor, Department of Prosthodontics, Melbourne Dental School, The University of Melbourne, Australia
- Luuk Crins DDS PhD candidate, Department of Dentistry, Radboud University Medical Centre, Nijmegen, the Netherlands
- Niek Opdam DDS, PhD Associate Professor in Restorative Dentistry and Cariology, Radboud University Medical Centre, Nijmegen, the Netherlands
- Bas A. C. Loomans DDS, PhD Professor in Oral Function and Restorative Dentistry, Radboud University Medical Centre, Nijmegen, the Netherlands
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Lin YC, Scialabba R, Lee JD, Sun J, Lee SJ. Assessment of Occlusal Vertical Dimension Change in Mechanical and Virtual Articulation: A Pilot Study. Dent J (Basel) 2022; 10. [PMID: 36354657 DOI: 10.3390/dj10110212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/03/2022] [Accepted: 11/07/2022] [Indexed: 11/09/2022] Open
Abstract
The aim of this clinical study was to investigate the change in occlusal vertical dimension (OVD) with dental casts mounted on a mechanical articulator using an average axis facebow and on a virtual articulator mounted using the Bonwill triangle and the Balkwill angle and compare these groups with OVD change observed clinically in patients. Casts were obtained from each patient (n = 14) and mounted on a semi-adjustable articulator in the facebow preservation group (FPG) and on a virtual articulator using average anatomic values in the average mounting group (AMG). Customized mandibular anterior splints were virtually designed at an OVD increased by 3, 6, and 9 mm. Digital buccal scans were performed with the anterior devices in the participants’ mouths in the intraoral group (IOG), AMG, and FPG at the different OVD increases accordingly. While no statistically significant differences (p > 0.05) were observed in the posterior interocclusal measurements with the incisal guide pin raised by 3 mm and 6 mm among all groups, a 9 mm increase resulted in a significant difference between AMG and IOG. The interocclusal posterior-to-anterior opening ratio observed clinically was 1:1.575. Increases in OVD up to 6 mm on dental casts mounted using average anatomic values performed similarly to the actual intraoral changes.
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Herkar PP, Anantharaj A, Praveen P, Shankarappa PR, Sudhir R. A comparative study of conventional and Hall techniques of crown placement using finite element stress analysis. J Indian Soc Pedod Prev Dent 2022; 40:302-310. [PMID: 36260472 DOI: 10.4103/jisppd.jisppd_173_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
BACKGROUND Hall technique of crown placement causes the changes in vertical occlusal dimension; the mode of settlement of which needs to be explored. AIM To assess and compare the changing patterns of stress distribution following placement of stainless steel crowns on primary teeth by Hall and conventional techniques using a finite element model analysis. MATERIALS AND METHODS The clinical crown heights of primary molars restored with Hall and conventional techniques and opposing teeth in contact, vertical dimension changes in the primary canine area were measured using intraoral digital scan. T-scan was used to measure the changes in bite force while the finite element analysis was used to assess deformative changes on the 2nd, 5th, 10th, and 15th days. RESULTS The Hall technique of crown placement caused more stress distribution in the tooth supporting tissues that settled in 2 weeks as compared with conventional technique of crown placement in which settlement occurred in 2 days. CONCLUSION The settling of vertical occlusal dimension as well as stress distribution in Hall technique probably takes place by intrusion of crowned tooth and opposing teeth in contact.
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Affiliation(s)
- Pawan Pramodrao Herkar
- Department of Paediatric and Preventive Dentistry, D. A. Pandu Memorial R. V. Dental College, Bengaluru, Karnataka, India
| | - A Anantharaj
- Department of Paediatric and Preventive Dentistry, D. A. Pandu Memorial R. V. Dental College, Bengaluru, Karnataka, India
| | - P Praveen
- Department of Paediatric and Preventive Dentistry, D. A. Pandu Memorial R. V. Dental College, Bengaluru, Karnataka, India
| | - Prathibha Rani Shankarappa
- Department of Paediatric and Preventive Dentistry, D. A. Pandu Memorial R. V. Dental College, Bengaluru, Karnataka, India
| | - R Sudhir
- Department of Paediatric and Preventive Dentistry, D. A. Pandu Memorial R. V. Dental College, Bengaluru, Karnataka, India
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Crins LAMJ, Opdam NJM, Kreulen CM, Sterenborg BAMM, Bronkhorst EM, Fokkinga WA, Huysmans MCDNJM, Loomans BAC. Prospective Study on CAD/CAM Nano-Ceramic (Composite) Restorations in the Treatment of Severe Tooth Wear. J Adhes Dent 2022; 24:105-116. [PMID: 35322948 DOI: 10.3290/j.jad.b2838137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
PURPOSE The aim of this prospective study was to evaluate the clinical performance of minimally invasive, CAD/CAM nano-ceramic (composite) restorations in patients with severe tooth wear, the effect of the restorative treatment on the oral health-related quality of life (OHRQoL), and the etiology of tooth wear as a risk factor for restoration failure. MATERIALS AND METHODS Patients with generalized severe tooth wear were included. Restorations (LAVA Ultimate, 3M Oral Care) were cemented (RelyX Ultimate, 3M Oral Care) on all teeth and were evaluated after 1 month and 1 year. OHRQoL was assessed via questionnaires at baseline and after 1 year. Differences were evaluated (paired t-test). Two mechanical tooth-wear lesions resulting from tooth-tooth contact, and 3 chemical tooth wear lesions resulting from intrinsic or extrinsic acids dissolving natural hard tooth substance, were evaluated to assess the etiology of tooth wear in association with restoration failure using multilevel logistic regression analyses (p < 0.05). RESULTS Twenty-one patients (age: 41.7 ± 10.4 years) were evaluated after 1 year (13.5 ± 1.2 months). 568 indirect CAD/CAM restorations were placed. None were replaced or lost. Twelve were repaired and 10 were refurbished. Success rates were 100% to 97.2%. Questionnaires showed a significant positive impact of the treatment on OHRQoL (p < 0.001). The presence of mechanical lesions did not pose a higher risk for restoration failure (p = 0.78). The presence of chemical lesions showed a lower risk of restoration failure (p = 0.002). CONCLUSION The use of minimally invasive, CAD/CAM nano-ceramic (composite) restorations in the restorative treatment of severely worn dentitions showed satisfactory results in the short term.
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Constantinescu FE, Savastano F, Perlea P, Constantinescu MV. Complete morphofunctional oral rehabilitation by physiological increase of occlusal vertical dimension according to computerized mandibular scanner. Rom J Morphol Embryol 2022; 63:245-251. [PMID: 36074691 PMCID: PMC9593108 DOI: 10.47162/rjme.63.1.28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
Increasing the occlusal vertical dimension (OVD) is often indicated in complex oral rehabilitation to gain restorative space and improve the occlusal relationship and aesthetics. The effect of increasing the OVD on lower facial height and facial aesthetics is not well understood and evaluated. The authors present the philosophy of the neuromuscular concept and illustrate it through a case report of a 58-year-old female patient who presented severe deep bite, bruxism, and temporomandibular disorders (TMDs). After clinical evaluation, the extraoral examination showed a reduction of the lower facial height, protuberant lips, wrinkles, and over-closed commissures. In addition, intraoral examination showed a severe anterior deep bite articulation, and the upper incisors completely covering the lower incisors labial surfaces. Through the philosophy of the neuromuscular concept the diagnostic ability, the quality and stability of the treatment increases. A temporary long-term fixed prosthesis was made at the enlarged OVD to be used in the first stage of the rehabilitation. Compared to the initial situation, the new prosthesis was delivered at a vertical dimension (VD) higher with 7 mm. The purpose of the neuromuscular philosophy and methodology is to harmonize the facial profile, functional occlusion, the joint function, and neuromuscular control. Through the neuromuscular methodology, we can assess the patient's ability to manage a significant increase in VD and to restore a functional OVD by physiological measurements.
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Affiliation(s)
- Florin-Eugen Constantinescu
- Dental Science Master, Department of Neuromuscular Orthodontics and Cranio-Mandibular Orthopedics, Jaume I University, Castellón de la Plana, Castellón, Spain
| | - Fabio Savastano
- Dental Science Master, Department of Neuromuscular Orthodontics and Cranio-Mandibular Orthopedics, Jaume I University, Castellón de la Plana, Castellón, Spain
| | - Paula Perlea
- Doctoral School, Faculty of Dentistry, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
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Tauböck TT, Schmidlin PR, Attin T. Vertical Bite Rehabilitation of Severely Worn Dentitions with Direct Composite Restorations: Clinical Performance up to 11 Years. J Clin Med 2021; 10:jcm10081732. [PMID: 33923679 PMCID: PMC8073648 DOI: 10.3390/jcm10081732] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/07/2021] [Accepted: 04/13/2021] [Indexed: 01/13/2023] Open
Abstract
Our aim was to evaluate the clinical performance of direct composite restorations placed in patients with severely worn dentitions at an increased vertical dimension of occlusion, after up to 11 years. One hundred and sixty-four teeth in 13 patients with severely worn dentitions had been reconstructed with either microhybrid (first cohort; n = 59) or nanofilled (second cohort; n = 105) composite restorations at increased vertical dimension of occlusion using a wax-up-based template-aided placement technique. From the dental records, information about repair and replacement of restorations was obtained. Patients were clinically examined after a mean follow-up time of 10.7 years (first cohort) or 5.2 years (second cohort) using United States Public Health Service (USPHS) criteria. Subjective patient satisfaction was also recorded using visual analogue scales (VAS). The overall quality of the restorations was good with predominantly 'Alpha' and 'Bravo' scores, respectively. Nanofilled composite showed less surface degradation and better margin qualities than microhybrid composite. Of the 59 restored teeth in the first cohort, 13 restorations showed unfavorable events after 10.7 years, of which ten could be repaired. In the second cohort, 23 of 105 restorations showed unfavorable events, which could all be repaired. VAS scores revealed high patient satisfaction with the treatment approach. In conclusion, direct composite restorations placed at an increased vertical dimension of occlusion show good clinical long-term performance in patients with severe tooth wear.
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Huamani J, Watanabe R, Huamani J, Salcedo-Moncada D, Alvitez-Temoche D, Mayta-Tovalino F. Accuracy between Functional Swallowing and Knebelman Craniometric Method to Measure Occlusal Vertical Dimension in Total Denture Wearers: A Quasi-experimental Study. J Int Soc Prev Community Dent 2021; 11:152-157. [PMID: 34036076 PMCID: PMC8118056 DOI: 10.4103/jispcd.jispcd_380_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 11/30/2020] [Accepted: 12/21/2020] [Indexed: 11/16/2022] Open
Abstract
Objective: The objective was to determine the accuracy between functional swallowing (FS) and the Knebelman craniometric method (KCM) to measure occlusal vertical dimension (OVD) in total denture wearers. Materials and Methods: A quasi-experimental, prospective study was conducted considering the KCM diagnostic method as the gold standard compared to FS. All the totally edentulous patients attended at the School of Dentistry of the Universidad Nacional Mayor de San Marcos (n = 32) in 2018–2019 were evaluated. Previous informed consent was obtained from all patients. A Knebelman’s Craniometer was used to obtain longitudinal measurements measured in millimeters. The measurement was made with the Knebelman Craniometer by placing the tip into the external auditory canal inside the right meatus. On the other hand, for the FS method, the patients were seated comfortably with their back supported and their head in a natural position. Both upper and lower rollers were inserted into the mouth and the patient was instructed to swallow saliva for a period of 5min. Results: When comparing the measurement of the OVD of KCM versus FS according to sex, men presented an OVD of 68.1 ± 3.9 mm, being 64.1 ± 3.8 mm in women. Accuracy was evaluated with an analysis of concordance between FS and the KCM in the determination of OVD in totally edentulous patients with a value of 0.97 (confidence interval = 0.31–0.99) (P = 0.013). Conclusions: There is a good concordance between the FS method and the KCM at the time of determining the OVD of edentulous patients using total prostheses.
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Affiliation(s)
- Juan Huamani
- Department of Rehabilitative Stomatology, Faculty of Dentistry, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Romel Watanabe
- Department of Rehabilitative Stomatology, Faculty of Dentistry, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Jose Huamani
- School of Stomatology, Faculty of Health of Sciences, Universidad Privada San Juan Bautista, Ica, Peru
| | - Doris Salcedo-Moncada
- Department of Rehabilitative Stomatology, Faculty of Dentistry, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | | | - Frank Mayta-Tovalino
- Postgraduate Department, CHANGE Research Working Group, Faculty of Health of Sciences, Universidad Científica del Sur, Lima, Peru
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Abstract
PURPOSE Patients in need of extensive prosthodontic treatment may need restoration of their occlusal vertical dimension (OVD) due to tooth wear, tooth loss, or changes that have occurred to existing prostheses over time. Prosthodontic treatment is based on the clinical application of the available evidence regarding interocclusal distance (IOD), the positional stability of rest vertical dimension (RVD), and the effect of altering the OVD. Hence, the purpose of this consensus document is to examine available data related to IOD, RVD, and alteration of the OVD. MATERIALS AND METHODS The search was limited to Clinical trials, Randomized Controlled Trials, Systematic Reviews and Meta-analyses. Key words were healthy patient, mean, range, interocclusal rest distance; healthy patient, mean, range, freeway space; and dentistry, interocclusal gap, and no citations appeared. Dentistry, interocclusal distance, revealed 5 not relevant citations. Dentistry, inter occlusal rest space, and dentistry, interocclusal rest distance, both had the same single not relevant citation. Dentistry, freeway space revealed over 7,000 citations. Dentistry, occlusal vertical dimension, revealed 253 citations, 7 of which were related to the search question but only 1 which was different from the previous search. Mandible, rest vertical dimension, age changes, found 7 citations, none relative to the question. Expanding the search to include journal article found 260 citations with only one relevant to the question. Mandible, rest vertical dimension, alteration, harm revealed no citations; mandible, occlusal vertical dimension, alteration, revealed 15 citations, 1 of which was relevant; mandible, occlusal vertical dimension, changes, revealed 75 citations, none of which were relevant; mandible, occlusal vertical dimension, rehabilitation revealed 10 citations, none of which were relevant. Expanding the search strategy to include Journal article, mandible, occlusal vertical dimension, alteration, received 159 citations, 4 of which were relevant; mandible, occlusal vertical dimension, restoration revealed 208 citations, 1 of which was relevant. Numerous other articles were culled by going through the reference lists of the aforementioned articles. RESULTS For IOD, 27 articles were found relevant to the search question, which confirmed a mean of 3.0 mm with ranges from 1 to 9 mm. Five articles revealed little evidence as to whether the RVD changes during life. For OVD, 20 articles, including 4 systematic reviews, revealed some evidence that skeletal growth continues from mid adolescence into mid adulthood; strong anecdotal evidence that some unopposed teeth will continue to erupt; no clinical evidence to support the concept that abraded teeth in occlusion in a patient with bruxism will undergo continuous eruption; and some evidence from clinical case reports that restoring OVD in patients with severe abrasion is a successful treatment. CONCLUSIONS There is a range of dimensions for the interocclusal distance (IOD) with many normal dental patients functioning with a higher or lower IOD than the commonly used 3.0 mm average dimension. The resting vertical dimension (RVD) is a 3-dimensional range with little evidence related to changes in the RVD during life. However, aging can cause a decrease in muscle tone which could affect the RVD. The restoration of the OVD can be successfully accomplished if proper diagnosis and treatment planning are performed.
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Affiliation(s)
| | - Charles Goodacre
- Advanced Education Program in Implant Dentistry, Loma Linda University School of Dentistry, Loma Linda, CA
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Kaffaf MB, Şeşen P, Şakar O. Rehabilitation of Occlusal Vertical Dimension in a Patient with Acromegaly: A Clinical Report. J Prosthodont 2020; 30:97-103. [PMID: 33150642 DOI: 10.1111/jopr.13280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/02/2020] [Indexed: 11/28/2022] Open
Abstract
Acromegaly is a rare acquired disorder caused by excessive growth hormone production. Dentists play an important role in the diagnosis of this disorder because of intraoral and extraoral symptoms such as extreme growth of the mandible, enlargement of the maxilla, diastema between teeth, a tendency toward malocclusion, a wide and thick nose, a marked malar bone, and thick lips. The prosthetic treatment of these patients is challenging because growth in the condyles and rami can lead to the development of a severe class III jaw relationship. This case report describes the prosthetic treatment of a patient with acromegaly. A decreased occlusal vertical dimension and class III jaw relationship were determined by intraoral and extraoral examinations and cephalometric radiography. The occlusal vertical dimension was reestablished by increasing it approximately 10 mm, as per the esthetic and functional needs of the patient. Four years after treatment, the patient was functioning well, and neither occlusal disharmony nor temporomandibular disorder was observed.
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Affiliation(s)
- Mehmet Berk Kaffaf
- Department of Prosthodontics, Istanbul University, Faculty of Dentistry, Istanbul, Turkey
| | - Pınar Şeşen
- Department of Prosthodontics, Istanbul University, Faculty of Dentistry, Istanbul, Turkey
| | - Olcay Şakar
- Department of Prosthodontics, Istanbul University, Faculty of Dentistry, Istanbul, Turkey
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Abstract
Increasing occlusal vertical dimension (OVD) by means of oral splints is a practice widely used in the treatment of temporomandibular disorders (TMD), specifically myofascial pain, although the results are still uncertain. Oral splints with a vertical height that significantly exceeds the clinical rest position are considered by some researchers to be a better therapeutic solution in alleviating TMD symptoms than are “low” splints.
In our observational study, 21 patients suffering from myofascial pain were examined for the effects of wearing a “high” oral splint while sleeping for 3 months. To ensure proper splint making, a mandibular stretching procedure was used to induce a relaxation of the patients’ masticatory muscles and allow the correct alignment of the jaws. Results showed a marked increase of the interocclusal distance or “free space” (hence of OVD; from 0.64±0.53 mm to 1.42±0.76 mm, p<0.0001) measured by a kinesiograph, followed by a substantial reduction of the intensity of pain in oral and extraoral regions after using the splint. These results support the view that increasing OVD beyond the clinical rest position is not detrimental to patients’ health. More importantly, high oral splints has been shown to be a promising therapeutic aid for the treatment of TMD and correlated pain syndromes. This clinical trial was registered on clinicaltrials.gov (Identifier: NCT02908568).
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Affiliation(s)
| | | | | | | | - G Traina
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Perugia, Perugia, Italy -
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13
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Levartovsky S, Aharonov O, Emodi Perlman A, Winocur E, Sarig R. The effect of tooth wear, age and sex on facial height assessed by soft tissue analysis. J Oral Rehabil 2019; 47:346-352. [PMID: 31705807 DOI: 10.1111/joor.12907] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 09/14/2019] [Accepted: 10/29/2019] [Indexed: 11/30/2022]
Abstract
AIM The aim of the study was to evaluate the effects of tooth wear, age and sex on facial height measurements based on soft tissue analysis. METHODS One hundred and twelve subjects (45 males and 67 females), 19-80 years of age (mean 43 ± 0.9 years), which were divided into three age groups, met the inclusion criteria. Tooth wear was assessed using a 5-point ordinal scale (0-4). Based on the tooth wear score, three groups were defined: mild, moderate and severe wear. Facial height was evaluated based on soft tissue measurements using frontal facial photographs. The dimension of the upper facial height (UFH) and lower facial height (LFH) and the ratio between the two (R-U-L) were measured. RESULTS Facial height dimensions (UFH, LFH) were significantly different between the three age groups and between the three tooth wear groups. Both the UFH and LFH measurements had a weak positive correlation with age (r = .40; r = .41, respectively) and with tooth wear (r = .40; r = .41, respectively). The R-U-L showed a significant difference (P < .001) between sexes as males showed slightly lower ratio compared with females; however, the R-U-L was not dependent upon age or tooth wear. CONCLUSIONS This study demonstrated that although facial height is affected by age and tooth wear, the proportion between the upper to lower facial segments is constant and is not affected by the same parameters. A statistically significant difference in the R-U-L relative to sexes was noted.
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Affiliation(s)
- Shifra Levartovsky
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, The Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Olisya Aharonov
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, The Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Alona Emodi Perlman
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, The Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ephraim Winocur
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, The Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Rachel Sarig
- Department of Oral Biology, The Maurice and Gabriela Goldschleger School of Dental Medicine, The Dan David Center for Human Evolution and Biohistory Research, The Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
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Morita K, Tsuka H, Kuremoto KI, Kimura H, Kawano H, Yokoi M, Yasuda K, Yoshida M, Tsuga K. Association between buccal mucosa ridging and oral feature/symptom and its effects on occlusal function among dentate young adults in a cross-sectional study of Japan. Cranio 2019; 39:24-28. [PMID: 30777516 DOI: 10.1080/08869634.2019.1581471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Objective: The purpose of this study was to assess the distinction in oral features/symptoms and occlusal function between young dentate individuals with and without buccal mucosa ridging (BMR). Methods: This cross-sectional study included 200 young adults. The outcome variable was BMR state. The predictor variables were oral features/symptoms (torus palatinus, torus mandibularis, temporomandibular joint noise, bruxism, tongue thrusting habit, number of teeth present, and occlusal vertical dimension) and oral function (occlusal force, occlusal contact area, occlusal pressure, tongue pressure). These variables were compared among participants with and without BMR using univariate and multiple logistic regression analysis. Results: There were 119 participants with BMR and 81 without BMR. Multiple logistic regression analysis revealed that BMR was closely associated with bruxism, occlusal vertical dimension, and occlusal pressure. Discussion: Oral/occlusal changes of increased bruxism, lower occlusal vertical dimension, and lower occlusal pressure constitute the major causes of BMR.
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Affiliation(s)
- Koji Morita
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical & Health Sciences , Hiroshima, Japan
| | - Hiroki Tsuka
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical & Health Sciences , Hiroshima, Japan
| | - Ko-Ichi Kuremoto
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical & Health Sciences , Hiroshima, Japan
| | - Hitomi Kimura
- Oral Implant Center, Tokushima University Hospital , Tokushima, Japan
| | - Hiromichi Kawano
- Oral Implant Center, Tokushima University Hospital , Tokushima, Japan
| | - Miyuki Yokoi
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical & Health Sciences , Hiroshima, Japan
| | - Keisuke Yasuda
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical & Health Sciences , Hiroshima, Japan
| | - Mitsuyoshi Yoshida
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical & Health Sciences , Hiroshima, Japan
| | - Kazuhiro Tsuga
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical & Health Sciences , Hiroshima, Japan
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15
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Deng H, Gao S, Lu S, Kumar A, Zhang Z, Svensson P. Alteration of occlusal vertical dimension induces signs of neuroplastic changes in corticomotor control of masseter muscles: Preliminary findings. J Oral Rehabil 2018; 45:710-719. [PMID: 29920731 DOI: 10.1111/joor.12682] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/15/2018] [Indexed: 12/23/2022]
Abstract
PURPOSE To investigate the effect of altering occlusal vertical dimension (OVD) in patients with severe attrition on corticomotor control of the masseter muscles as assessed by navigated transcranial magnetic stimulation (nTMS). METHODS Seven patients (58.6 ± 8.4 years) with decreased OVD due to severe attrition were given mandibular occlusal splints to alter the OVD with the instruction to wear during the whole awake time for a period of four weeks. Motor-evoked potentials (MEPs) and the motor cortex maps of the masseter muscles and first dorsal interosseous (FDI) muscles as control were recorded by nTMS at baseline and at least 4 weeks after the alteration of OVD. The stimulus-response curves of MEPs were analysed with two-way repeated-measures ANOVA, and the numerical rating scale scores, motor thresholds, onset latencies, motor cortex maps and centre of gravity (COG) were analysed with paired t tests. RESULTS There was a significant increase in the amplitude of the masseter muscle MEPs (P = 0.036), but no change in the motor cortex map areas (P = 0.111) four weeks after the alteration of OVD. Furthermore, there was no significant difference in either the amplitude of the FDI muscle MEPs (P = 0.466) or the motor cortex map areas (P = 0.230) before and after OVD alteration. CONCLUSION The results suggest that alteration of OVD in patients with severe attrition was associated with signs of neuroplastic changes in the corticomotor control of the masseter muscles. The results of the study may add to our understanding of the putative mechanisms related to cortical changes in response to OVD alterations.
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Affiliation(s)
- Hongyan Deng
- Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Shang Gao
- Capital Medical University, Beijing, China
| | - Shengyi Lu
- Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Abhishek Kumar
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark
| | - Zhenting Zhang
- Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Peter Svensson
- Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet, Huddinge, Sweden.,Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus, Denmark.,Section of Orofacial Pain and Jaw Function, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
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16
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Matoba H, Kanayama H, Kato T, Hossain MZ, Kitagawa J, Takehana Y, Yamada K, Masuda Y. Temporal change in the occlusal vertical dimension and its involvement in modulation of jaw movement in bite-reduced animals. J Oral Sci 2018; 60:170-176. [PMID: 29743384 DOI: 10.2334/josnusd.17-0122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The occlusal vertical dimension (OVD) in guinea pigs is maintained by tooth eruption and grinding. It has been reported that the experimentally raised OVD recovers to the innate OVD within a few days in guinea pigs. However, the mechanisms underlying OVD adjustment are not entirely understood. This study thus aimed to clarify whether the experimentally reduced OVD would recover. Bite-reduced guinea pigs were created by applying bilateral intermaxillary elastics for 10 days. Guinea pigs without elastics were used as a control. The OVD after removal of the elastics in the experimental group was compared with that of the control group. Jaw movement during chewing was also compared between the experimental and control groups. After removal of the elastics, the experimentally reduced OVD did not recover fully and a significant difference was observed between the experimental and control groups for up to 25 days during the recording period. The minimum closed position during chewing was significantly higher in the experimental group than in the control group, whereas the maximum open position was no different between the groups. The present findings indicated that the experimentally reduced OVD could not be fully recovered, suggesting that reduction of the OVD may have limited influence on jaw movement.
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Affiliation(s)
| | | | - Takafumi Kato
- Department of Oral Physiology, Graduate School of Dentistry, Osaka University
| | | | | | | | | | - Yuji Masuda
- Department of Oral and Maxillofacial Biology, Graduate School of Oral Medicine, Matsumoto Dental University
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17
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Furuya J, Tamada Y, Sato T, Hara A, Nomura T, Kobayashi T, Sakai M, Kondo H. Wearing complete dentures is associated with changes in the three-dimensional shape of the oropharynx in edentulous older people that affect swallowing. Gerodontology 2016; 33:513-521. [PMID: 25939853 DOI: 10.1111/ger.12197] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/03/2015] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To investigate the effects of wearing complete dentures on pharyngeal shape for swallowing in edentulous older people. BACKGROUND In the absence of complete dentures, edentulous older people often lose the occlusal support necessary to position the mandible, which leads to an anterosuperior shift of the mandible during swallowing. This may result in pharyngeal shape changes effecting swallowing function in older people. However, the details of this phenomenon are currently unclear. MATERIALS AND METHODS Participants were 17 older edentulous volunteers. Cone-beam computed tomography imaging was performed with the participant in the seated position and wearing (i) both maxillary and mandibular dentures, (ii) maxillary dentures only and (iii) no dentures. During imaging, participants were instructed to keep their mouth closed to the mandibular position determined in advance during swallowing for each denture-wearing condition. The volume, height and average cross-sectional area of the velopharynx and oropharynx were measured, and the positions of the epiglottis and mandible were recorded. RESULTS While the vertical height of the oral cavity and pharynx significantly decreased, the volume and average cross-sectional area of the oropharynx significantly increased when dentures were not worn (p < 0.01). The absence of dentures caused an anterosuperior shift of the mandible when swallowing and drew the epiglottis forward, resulting in expansion of the oropharynx where the tongue base forms the anterior wall. CONCLUSION The absence of dentures results in anatomical changes in oropharyngeal shape that may exacerbate the pharyngeal expansion caused by ageing and reduce the swallowing reserve.
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Affiliation(s)
- Junichi Furuya
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan.
| | - Yasushi Tamada
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
| | - Tomohide Sato
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
| | - Atsushi Hara
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
| | - Taro Nomura
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
| | - Takuya Kobayashi
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
| | - Maiko Sakai
- Department of Restorative Dentistry and Biomaterials Sciences, Harvard School of Dental Medicine, Boston, MA, USA
| | - Hisatomo Kondo
- Department of Prosthodontics and Oral Implantology, School of Dentistry, Iwate Medical University, Morioka, Iwate, Japan
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18
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Zanardi PR, Santos MS, Stegun RC, Sesma N, Costa B, Laganá DC. Restoration of the Occlusal Vertical Dimension with an Overlay Removable Partial Denture: A Clinical Report. J Prosthodont 2016; 25:585-588. [PMID: 26376203 DOI: 10.1111/jopr.12351] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2015] [Indexed: 11/28/2022] Open
Abstract
The process of tooth loss throughout life associated with severe occlusal wear may pose a challenge in the rehabilitation of partially edentulous arches. In these cases, many therapeutic procedures are necessary because each tooth must be restored to obtain the correct anatomical contour and recover the occlusal vertical dimension (OVD). A removable partial denture (RPD) with occlusal/incisal coverage, also known as an overlay RPD, is an alternative treatment option with fewer interventions, and, consequently, lower cost. This clinical report reviews the principles involved in the clinical indication for an overlay RPD, as well as the necessary planning and execution, to discuss the feasibility and clinical effectiveness of this treatment, identifying the indications, advantages, and disadvantages of this procedure through the presentation of a clinical case. The overlay RPD can be an alternative treatment for special situations involving partially edentulous arches in patients who need reestablishment of the OVD and/or realignment of the occlusal plane, and it can be used as a temporary or definitive treatment. The main advantages of this type of treatment are its simplicity, reversibility, and relatively low cost; however, further studies are needed to ensure the efficacy of this treatment option.
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Affiliation(s)
- Piero Rocha Zanardi
- Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil.
| | - Mayara Silva Santos
- Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Roberto Chaib Stegun
- Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Newton Sesma
- Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Bruno Costa
- Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Dalva Cruz Laganá
- Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
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19
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Alhajj MN, Khalifa N, Amran A. Eye-rima oris distance and its relation to the vertical dimension of occlusion measured by two methods: Anthropometric study in a sample of Yemeni dental students. Eur J Dent 2016; 10:29-33. [PMID: 27011736 PMCID: PMC4784150 DOI: 10.4103/1305-7456.175689] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Objective: This study was conducted to evaluate the relationship between the distance measured from the distal outer of the eye to the parting line of the lips and the occlusal vertical dimension (OVD) measured by two methods. Methods: One hundred and fourteen dental students (76 males and 38 females) were recruited for this study with mean age (22.34 ± 1.83) years. The distance from distal canthus of the eye to rima oris (eye-RO) was compared with two different measurements of the OVD (nasal [N] to gnathion [Gn], and subnasal [Sn] to menton [Me]). All distances were measured using modified digital caliper. Results: Pearson correlation coefficient test for correlations and paired samples t-test for differences were used with a significant level of (P < 0.05). There was a positive significant correlation between the eye-RO distance and the two measurements of the OVD. However, this correlation was stronger between eye-RO and the distance from the tip of the nose to the tip of the chin than that between eye-RO and the distance from the septum of the nose to the under of the chin (r = 0.313 with P = 0.0007, r = 0.296 with P = 0.0014), respectively. Conclusion: The distance from the outer canthus of the eye to the parting of the lips seems to be a reliable method in predicting the OVD and should relate to the distance from the tip of the nose to the tip of the chin.
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Affiliation(s)
- Mohammed Nasser Alhajj
- Department of Oral Rehabilitation, Faculty of Dentistry, Khartoum University, Khartoum, Sudan.,Department of Prosthodontics, Faculty of Dentistry, Thamar University, Dhamar, Yemen
| | - Nadia Khalifa
- Department of General and Specialist Dental Practice, College of Dental Medicine, University of Sharjah, Sharjah, UAE
| | - Abdullah Amran
- Department of Periodontics, Faculty of Dentistry, Thamar University, Dhamar, Yemen
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20
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El-Kerdani T, Nimmo A. A Single Visit Direct Technique to Provisionally Restore Occlusion for a Full-Mouth Rehabilitation: A Clinical Report. J Prosthodont 2015; 25:66-70. [PMID: 25659611 DOI: 10.1111/jopr.12267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/16/2014] [Indexed: 11/30/2022] Open
Abstract
Attrition of the dentition can negatively affect esthetics and function. When reconstructing patients with attrition who require restoration at increased occlusal vertical dimension (OVD), it is necessary to first evaluate the OVD using a removable interim prosthesis to ensure that the patient will tolerate the new position. The transition to fixed interim prostheses has to be carefully planned to achieve the desired OVD. One approach is to prepare all teeth in a single day and place full-arch interim prostheses; however, this can be tiring for the patient and prosthodontist. An alternative approach is to prepare one arch and place interim prostheses, while using composite resin in the opposing arch to maintain the newly established OVD. A diagnostic wax-up at the proposed OVD is completed and duplicated in stone. A vacuform matrix is loaded with composite resin and applied to the unprepared etched teeth of the opposing arch to restore form and occlusion until full contour interim prostheses are placed at a later visit.
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Affiliation(s)
- Tarek El-Kerdani
- Department of Restorative Dental Sciences, University of Florida College of Dentistry, Gainesville, FL
| | - Arthur Nimmo
- Department of Restorative Dental Sciences, University of Florida College of Dentistry, Gainesville, FL
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Abstract
PURPOSE Establishing the optimum occlusal vertical dimension (OVD) in prosthetic treatment is an important clinical procedure. No methods are considered to be scientifically accurate in determining the reduced OVD in patients with missing posterior teeth. The purpose of this study was to derive a new formula to predict the lower facial height (LFH) using cephalometric analysis. MATERIALS AND METHODS Fifty-eight lateral cephalometric radiographs of Japanese clinical residents (mean age, 28.6 years) with complete natural dentition were used for this study. Conventional skeletal landmarks were traced. Not only the LFH, but six angular parameters and four linear parameters, which did not vary with reduced OVD, were selected. Multiple linear regression analysis with a stepwise forward approach was used to develop a prediction formula for the LFH using other measured parameters as independent variables. RESULTS The LFH was significantly correlated with Gonial angle, SNA, N-S, Go-Me, Nasal floor to FH, Nasal floor to SN, and FH to SN. By stepwise multiple linear regression analysis, the following formula was obtained: LFH (degree) = 65.38 + 0.30* (Gonial angle; degree) - 0.49* (SNA; degree) - 0.41* (N-S; mm) + 0.21* (Go-Me; mm) - 15.45* (Nasal floor to FH; degree) + 15.22* (Nasal floor to SN; degree) - 15.40* (FH to SN; degree). CONCLUSIONS Within the limitations of this study for one racial group, our prediction formula is valid in every LFH range (37 to 59°), and it may also be applicable to patients in whom the LFH deviated greatly from the average.
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Affiliation(s)
- Shuichiro Yamashita
- Professor, Department of Clinical Oral Health Science, Tokyo Dental College, Tokyo, Japan
| | - Mariko Shimizu
- Postgraduate Clinical Assistant, Suidobashi Hospital, Tokyo Dental College, Tokyo, Japan
| | - Hidenori Katada
- Lecturer, Department of Orthodontics, Tokyo Dental College, Tokyo, Japan
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Noh K, Kwon KR, Ahn H, Paek J, Pae A. Prosthetic rehabilitation of a cleidocranial dysplasia patient with vertical maxillofacial deficiency: a clinical report. J Prosthodont 2013; 23:64-70. [PMID: 23725034 DOI: 10.1111/jopr.12056] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2013] [Indexed: 11/28/2022] Open
Abstract
Cleidocranial dysplasia (CCD) is a rare congenital disorder characterized by skeletal and dental anomalies. This clinical report describes the prosthodontic approach to treating a CCD patient who presented with decreased facial height and relative mandibular protrusion due to maxillary hypoplasia after orthodontic treatment. Functional and esthetic rehabilitation was achieved using telescopic detachable prostheses in the maxilla and osseointegrated implants and metal-ceramic fixed dental prostheses in the mandible. These treatment approaches precluded the need for orthognathic surgical correction and presented a favorable prognosis during the 5-year observation period.
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Affiliation(s)
- Kwantae Noh
- Clinical Instructor, Department of Prosthodontics, School of Dentistry, Kyung Hee University, Seoul, South Korea
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23
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Sierpinska T, Kuc J, Golebiewska M. Morphological and Functional Parameters in Patients with Tooth Wear before and after Treatment. Open Dent J 2013; 7:55-61. [PMID: 23802024 PMCID: PMC3681002 DOI: 10.2174/1874210601307010055] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 02/24/2013] [Accepted: 03/06/2013] [Indexed: 11/22/2022] Open
Abstract
UNLABELLED Advanced tooth wear often results in lost vertical dimension and impacts facial aesthetics. Complex restorative treatment can replace the lost tooth structure and improve functional occlusal and facial skeleton parameters. PURPOSE The aim of the study is to assess changes in the morphological and functional occlusal parameters of the facial skeleton after prosthetic rehabilitation that increased lost occlusal vertical dimension. MATERIAL AND METHODOLOGY 50 patients with advanced tooth wear were clinically examined, to assess the degree of wear. Each subject underwent cephalometric analysis, digital occlusal analysis, and electromyographic analysis, of the anterior temporalis, superficial masetter, anterior digastric, and the sternocleidomastoid muscles. Prosthodontic treatment was performed to restore the occlusal vertical dimension of each subject's occlusion, which was followed by repeating the pretreatment analyses. Pre and post treatment parameters were statistically compared. RESULTS Pre-treatment cephalometric analysis showed that lost vertical dimension reduced anterior facial height and resulted in small angular skeletal parameters. Post treatment anterior facial height increased from the increased occlusal vertical dimension. The mean value of functional electrical activity during clenching post treatment, increased compared to pretreatment. CONCLUSION Increasing the vertical dimension of occlusion improved facial aesthetics by positively affecting facial skeletal angles. The restored occlusal surface morphology changed the pre treatment flat broad occlusal contacts into more point contacts. The increased vertical dimension of occlusion after treatment also increased muscle activity levels over the pretreatment levels after three months period of adaptation.
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Affiliation(s)
- Teresa Sierpinska
- Department of Prosthetic Dentistry, Medical University of Bialystok, Poland
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