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Yan Q, Liao L, He D. Risk factors associated with temporomandibular joint disorder: A mendelian randomization analysis. J Oral Rehabil 2024. [PMID: 39041331 DOI: 10.1111/joor.13795] [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: 04/20/2024] [Revised: 06/08/2024] [Accepted: 06/24/2024] [Indexed: 07/24/2024]
Abstract
BACKGROUND Temporomandibular joint disorder (TMD), a prevalent orofacial disorder with complex aetiologies and considerable socioeconomic costs. This underscores the critical importance of developing a comprehensive understanding of the risk factors associated with TMD, as existing research is hindered by deficiencies in establishing causal relationships and the limitations of traditional research methodologies. OBJECTIVES This research explores the causal link between certain risk factors and temporomandibular joint disorder (TMD) through Mendelian randomization (MR), providing multidimensional perspectives in addressing this worldwide health issue. METHODS Utilizing instrumental variables, we applied advanced statistical methods, including the weighted median, inverse variance weighted (IVW) and MR-Egger, to evaluate the impact of twelve potential risk factors on TMD. RESULTS Our results identified a significant positive association of TMD with malocclusion (p < .001), sleeping disorders (p = .006), anxiety (p = .002), major depression (p = .0002), daily cigarettes consumption (p = .029) and autoimmune diseases (p = .039). Conversely, a negative association was observed with educational attainment (p = .003). CONCLUSION These findings suggest that malocclusion, sleeping disorders, anxiety, major depression, daily cigarettes consumption and autoimmune diseases, could potentially increase TMD risk while educational attainment might mitigate its increase. No direct causal relationships were established between serum 25-hydroxyvitamin D levels, menopause, frequent alcohol consumption, coffee intake and severely worn dentition and TMD.
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Affiliation(s)
- Qinghan Yan
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Lingzi Liao
- Department (Hospital) of Stomatology, Lanzhou University, Lanzhou, China
| | - Dengqi He
- Department (Hospital) of Stomatology, Lanzhou University, Lanzhou, China
- Department of Stomatology, The First Hospital of Lanzhou University, Lanzhou, China
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2
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Fayad MI. A Literature Review of Vertical Dimension in Prosthodontics Theory and Practice - Part 1: Theoretical Foundations. Cureus 2024; 16:e61903. [PMID: 38855484 PMCID: PMC11161034 DOI: 10.7759/cureus.61903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/06/2024] [Indexed: 06/11/2024] Open
Abstract
Vertical dimension (VD) is a critical factor in prosthodontics, playing a pivotal role in the functional and aesthetic outcomes of dental treatments. This literature review explores theoretical foundations and the various aspects of VD, including its definition, measurement, and clinical significance in prosthodontics. The relationship between VD and temporomandibular disorders (TMDs) is examined. Additionally, the impact of VD on facial proportions and aesthetics is significant, as it affects the lower third of the face and influences the patient's overall appearance and self-esteem. In conclusion, understanding the intricate relationship between VD, TMDs, facial aesthetics, and psychological well-being is essential for effective prosthodontic treatment. This comprehensive review provides valuable insights into the multifaceted role of VD in enhancing both functional and aesthetic outcomes, ultimately improving patient satisfaction and quality of life.
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Affiliation(s)
- Mostafa I Fayad
- College of Dentistry, Taibah University, Madinah, SAU
- Dentistry, Al-Azhar University, Cairo, EGY
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3
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Yadfout A, El Aoud J, Merzouk N, Slaoui Hasnaoui J. Increasing Vertical Dimension of Occlusion (VDO): Review. Clin Cosmet Investig Dent 2024; 16:135-142. [PMID: 38770218 PMCID: PMC11104375 DOI: 10.2147/ccide.s453704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 04/09/2024] [Indexed: 05/22/2024] Open
Abstract
The need to increase the Vertical Dimension of Occlusion (VDO) to restore lost dental function or optimise specific dental treatments is a common occurrence in daily dental practice. The common belief that the Vertical Dimension at Rest (VDR) is fixed hinders the development of restorations with a VDO that encroaches on or surpasses the interocclusal rest space (IRS), thereby preventing potential tissue damage to the masticatory apparatus. Recent studies have shown that the mandible rest position falls within a range termed as the "comfort zone". The range of this zone may vary from one person to another and within the same person over time due to factors such as age or health status. In this review, we have concluded that a permanent increase in the VDO, once indicated, is a safe procedure for dentulous patients. However, it is important to minimise the extent of the increase to simplify the prosthodontics treatment process. An inter-incisal increase exceeding 5 mm is seldom needed. Moreover, it is important to consider the functional, aesthetic, and biological elements associated with VDO. The biological and functional environment closely related to the VDO had great adaptive capacities, which have for a historically been underestimated. Patient adaptation has been observed in dentate patients, edentulous patients, and even cases involving implant-supported prostheses. Muscle relaxation and changes in muscle length are likely the primary adaptation mechanisms, rather than the restoration of the original VDO through dentoalveolar maturation. Intervention with a fixed restoration is more predictable and results in a higher and more rapid level of adaptation. Finally, the increase should include the entire arch to prevent relapse of the VDO to its previous value, and changes in VDO should be assessed by utilising temporary diagnostic restorations for a period before implementing definitive prostheses, in order to evaluate the adaptive muscle response.
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Affiliation(s)
- Asmae Yadfout
- Department of Removable Prosthodontics, Faculty of Dentistry, Mohammed V University, Rabat, Morocco
| | - Jihane El Aoud
- Department of Removable Prosthodontics, Faculty of Dentistry, Mohammed V University, Rabat, Morocco
| | - Nadia Merzouk
- Department of Removable Prosthodontics, Faculty of Dentistry, Mohammed V University, Rabat, Morocco
| | - Jihane Slaoui Hasnaoui
- Department of Removable Prosthodontics, Faculty of Dentistry, Mohammed V University, Rabat, Morocco
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4
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Dubey SA, Gorripati JP, Nimonkar S, Priya M. Optimizing Implant Placement in Cases of Limited Interocclusal Space: Strategies and Challenges. Cureus 2024; 16:e60886. [PMID: 38910621 PMCID: PMC11193082 DOI: 10.7759/cureus.60886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Accepted: 05/22/2024] [Indexed: 06/25/2024] Open
Abstract
Effective treatment planning is crucial for implant-supported dental prostheses' success, requiring a thorough assessment of various factors, including bone quality, quantity, and available space. Evaluating space availability, encompassing height, width, and angulation, is imperative to ensure optimal implant positioning devoid of anatomical limitations. Adequate vertical space is essential for accommodating the implant-supported restoration while preserving proper occlusal function and esthetics. However, not all cases adhere to ideal standards, especially those featuring limited interocclusal space, as seen in scenarios of long-standing edentulous areas lacking prior prosthetic rehabilitation. Ideally, the interocclusal space should measure between 8-12 mm vertically. This case report details the management of reduced interocclusal space through the strategic placement of deeply positioned implants and the incorporation of a screw-retained fixed partial denture, effectively addressing the challenges associated with limited space.
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Affiliation(s)
- Surekha A Dubey
- Department of Prosthodontics, Sharad Pawar Dental College, Datta Meghe Institute of Medical Sciences, Wardha, IND
| | - Jahnavi P Gorripati
- Department of Prosthodontics, Sharad Pawar Dental College, Datta Meghe Institute of Medical Sciences, Wardha, IND
| | - Sharayu Nimonkar
- Department of Prosthodontics, Sharad Pawar Dental College, Datta Meghe Institute of Medical Sciences, Wardha, IND
| | - Madhu Priya
- Department of Prosthodontics, Sharad Pawar Dental College, Datta Meghe Institute of Medical Sciences, Wardha, IND
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5
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Lei Q, Lin D, Lin K, Huang W, Wu D, Liu Y. Clinical and electromyographic signals analysis about the effect of space-adjustment splint on overerupted maxillary molars. BMC Oral Health 2024; 24:296. [PMID: 38431564 PMCID: PMC10909290 DOI: 10.1186/s12903-024-04039-6] [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: 08/07/2023] [Accepted: 02/17/2024] [Indexed: 03/05/2024] Open
Abstract
BACKGROUND Overerupted maxillary molars is common in adults, which can lead to insufficient intermaxillary vertical space ,great difficulty in prosthetic reconstruction ,and cause occlusal interference in movements.To reconstruct occlusal function, it is necessary to prepare enough space for prostheses. The aim of the present study was to evaluate the effect of space-adjustment occlusal splint on overerupted maxillary molars by clinical and electromyographic signals analysis. METHODS Eighteen patients with overerupted maxillary molars were selected to wear space-adjustment occlusal splint suppressing overerupted maxillary molars for three months. Satisfaction was assessed by 5-point Likert; intermaxillary vertical space and the teeth transportation distance were measured in models; clinical periodontal status were evaluated by periodontal probing depth (PPT) and bleeding index (BI); electromyographic recordings of the masseter and anterior temporal muscles were monitored by Cranio-Mandibular K7 Evaluation System. RESULTS All the patients were satisfied with the treatment effect (Likert scale ≧ 4). The intermaxillary space in edentulous areas after treatment showed statistically significant increasing when compared with those before treatment. PPT and BI showed no significant difference. No statistically significant differences were found in electromyographic activity of anterior temporal muscles, while a reduction of muscle activity in masseter in the contralateral side were detected in post-treatment evaluations compared with pre-treatment at mandibular rest position. CONCLUSIONS Space-adjustment occlusal splint is an efficient treatment option on overerupted maxillary molars by intruding the maxillary molar to obtain adequate intermaxillary space for prostheses.
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Affiliation(s)
- Qun Lei
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China.
| | - Dong Lin
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Kaijin Lin
- Fujian Medical University, Fuzhou, China
| | - Wenxiu Huang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Dong Wu
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Yuyu Liu
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key Laboratory of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
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6
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Satin SR, Goodacre BJ, Masri R. Comparing the accuracy of occlusal vertical dimension transfer in CAD-CAM dentures. J Prosthodont 2024; 33:239-245. [PMID: 36815435 DOI: 10.1111/jopr.13669] [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: 10/10/2022] [Accepted: 02/16/2023] [Indexed: 02/24/2023] Open
Abstract
PURPOSE There are different methods to transfer occlusal vertical dimension (OVD) when fabricating complete dentures, but it is not clear which method yields the most accurate transfer. This study investigated the accuracy of transferring the OVD of the maxillary/mandibular relationship when designing and fabricating digital dentures by evaluating two commonly used workflows: duplicate dentures (DDs) and occlusion rims (ORs). MATERIALS AND METHODS Mounted edentulous casts were used to simulate a completely edentulous patient. These casts were used in two workflows: (1) DD workflow where complete dentures were fabricated and relined (n = 15), and (2) OR where final impressions and ORs were constructed (n = 15). Relined dentures and ORs with fiduciary markers were then scanned and virtually articulated, then exported as STL files. A scan of the articulated casts (simulated patients) with fiduciary markers embedded was also exported as an STL file and used as a control. STL files for each workflow were superimposed over the control and analyzed in 3D inspection software (Geomagic Control X, 3D Systems, NC) for deviations (mm) at three different locations. Average 3D deviations were compared among the groups using a two-way ANOVA (α-0.05). RESULTS The average deviation for OR was significantly larger than DD at all locations of measurement [F = 46.00, p < 0.0001]. The majority of the measurements (98.9%) had a positive deviation value, indicating increased OVD. The overall deviation for the OR group from the control was 0.72 ± 0.13 mm versus 0.45 ± 0.23 mm for the DD group. There was no difference in deviation between the points of measurement and no interaction between the location and method [F = 0.02, p < 0.98]. CONCLUSIONS The DD workflow exhibited less deviation in the transfer of OVD than the OR workflow. However, the deviation was small and may not be clinically significant.
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Affiliation(s)
- Sara R Satin
- Department of Oral Sciences and Pain. Division of Prosthodontics, University of Maryland, Baltimore, Maryland, USA
| | - Brian J Goodacre
- Division of General Dentistry, Loma Linda University, Loma Linda, California, USA
| | - Radi Masri
- Department of Oral Sciences and Pain. Division of Prosthodontics, University of Maryland, Baltimore, Maryland, USA
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7
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Lim TW, Idris RI, Mahmud M. Patient satisfaction following resin-bonded fixed dental prostheses cemented by using the Dahl concept. Clin Exp Dent Res 2023; 9:1089-1095. [PMID: 37622386 PMCID: PMC10728528 DOI: 10.1002/cre2.774] [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: 06/03/2023] [Revised: 07/17/2023] [Accepted: 08/02/2023] [Indexed: 08/26/2023] Open
Abstract
OBJECTIVE Resin-bonded fixed dental prostheses (RBFDPs) cemented at an increased occlusal vertical dimension (OVD) (the Dahl concept) to create space for a metal retainer remains controversial because of the lack of reported clinical studies. This study analyzed the demographic (age and sex) and clinical factors (location and arch of prosthesis) affecting the patients' perception of RBFDPs cemented at an increased OVD. MATERIAL AND METHODS Twenty-eight participants treated with cantilevered RBFDP at an increased OVD were prospectively recruited. They were asked to answer a validated patient satisfaction questionnaire based on six parameters during the 12-week review visit. RESULTS 71.4% of the participants were completely satisfied with the color, shape, and function. Twenty-one (75%) participants reported no complaints about the prostheses. 89.3% will recommend this treatment option to others. There was a significant difference between males and females in avoiding loading on the prostheses (p = 0.015). The level of satisfaction did not differ by age, ethnicity, location, and arch of the prostheses (p > 0.05). CONCLUSIONS Patient satisfaction toward RBFDP cemented by using the Dahl approach was generally high on all the parameters at the 12-week review visit.
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Affiliation(s)
- Tong Wah Lim
- Division of Restorative Dental Sciences, Faculty of DentistryThe University of Hong KongPok Fu LamHong Kong
| | | | - Melati Mahmud
- Centre of Restorative Dentistry Studies, Faculty of DentistryUniversiti Teknologi MARASungai BulohMalaysia
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8
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Brazão-Silva MT, Guimarães DM, Andrade VC, Rodrigues DC, Matsubara VH. Do dental implant therapies arouse signs and symptoms of temporomandibular disorders? A scoping review. Cranio 2023; 41:508-517. [PMID: 33618629 DOI: 10.1080/08869634.2021.1885885] [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] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To delineate and discuss the literature about TMD in the context of dental implantology. METHODS The PRISMA-ScR and Joanna Briggs guidelines for scoping reviews were used as methodological parameters. In vivo studies published in the English language showing interplay between dental implant therapy and TMD were included. A systematic screen strategy was applied in two platforms to obtain a broad range of relevant literature published in English. RESULTS The literature review indicated that prolonged surgical procedure may be a risk for TMD. Conversely, implant-supported prostheses were found to contribute to the mitigation of some TMD aspects. Empirical principles for the best practice in implant dentistry concerning the TMD were discussed in the present study. CONCLUSION The included clinical studies suggest that factors associated with the implant placement, such as long duration of surgical procedures, may represent risk factors for TMD. They also indicate long-term benefits of implant-supported restorations.
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Affiliation(s)
| | | | - Valdir Cabral Andrade
- School of Dentistry, Federal University of Juíz de Fora (Governador Valadares), Governador Valadares, Brazil
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9
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Bhargava D, Chávez Farías C, Ardizone García I, Mercuri LG, Bergman S, Anthony Pogrel M, Sidebottom AJ, Srouji S, Şentürk MF, Elavenil P, Moturi K, Anantanarayanan P, Bhargava PG, Singh VD. Recommendations on the Use of Oral Orthotic Occlusal Appliance Therapy for Temporomandibular Joint Disorders: Current Evidence and Clinical Practice. J Maxillofac Oral Surg 2023; 22:579-589. [PMID: 37534353 PMCID: PMC10390439 DOI: 10.1007/s12663-023-01939-y] [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: 09/27/2022] [Accepted: 05/20/2023] [Indexed: 08/04/2023] Open
Abstract
Background 'Temporomandibular joint disorders (TMDs)' denote an umbrella term that includes arthritic, musculoskeletal and neuromuscular conditions involving the temporomandibular joint, the masticatory muscles, and the associated tissues. Occlusal devices are one of the common treatment modalities utilized in the conservative management of TMDs. The indications for the available 'oral splints' or 'oral orthotic occlusal devices' remain ambiguous. Methods A joint international consortium was formulated involving the subject experts at TMJ Foundation, to resolve the current ambiguity regarding the use of oral orthotic occlusal appliance therapy for the temporomandibular joint disorders based on the current scientific and clinical evidence. Results The recommendations and the conclusion of the clinical experts of the joint international consort has been summarized for understanding the indications of the various available oral orthotic occlusal appliances and to aid in the future research on oral occlusal orthotics. Conclusion The use of the oral orthotic occlusal appliances should be based on the current available scientific evidence, rather than the archaic protocols.
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Affiliation(s)
- Darpan Bhargava
- Joint International Consortium on Oral Orthotic Occlusal Appliance Therapy for Temporomandibular Joint Disorders, TMJ Foundation, TMJ Consultancy Services, Bhopal, Madhya Pradesh India
- Oral and Maxillofacial Surgery, People’s University, Bhopal, Madhya Pradesh India
- DAMER India, Bhopal, India
| | - Camilo Chávez Farías
- Joint International Consortium on Oral Orthotic Occlusal Appliance Therapy for Temporomandibular Joint Disorders, TMJ Foundation, TMJ Consultancy Services, Bhopal, Madhya Pradesh India
- Department of Temporomandibular Joint Disorders, Orofacial Pain and Dental Sleep Medicine, Complutense University of Madrid, Madrid, Spain
| | - Ignacio Ardizone García
- Department of Temporomandibular Joint Disorders, Orofacial Pain and Dental Sleep Medicine, Complutense University of Madrid, Madrid, Spain
| | - Louis G. Mercuri
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, USA
- Department of Bioengineering, University of Illinois, Chicago, USA
- Stryker/TMJ Concepts, Ventura, CA USA
| | - Suzie Bergman
- Joint International Consortium on Oral Orthotic Occlusal Appliance Therapy for Temporomandibular Joint Disorders, TMJ Foundation, TMJ Consultancy Services, Bhopal, Madhya Pradesh India
- Division for Temporomandibular Joint Disorders and Orthodontics, Dentistry On Officers Row, McGann Postgraduate School of Dentistry, Progressive Orthodontic Seminars, Vancouver, WA USA
| | - M. Anthony Pogrel
- Department of Oral and Maxillofacial Surgery, UCSF School of Dentistry, UCSF Dental Center, San Francisco, CA USA
| | - Andrew J. Sidebottom
- Oral and Maxillofacial Surgery & Temporomandibular Joint Related Surgery, Nottingham, UK
| | - Samer Srouji
- Department of Oral and Maxillofacial Surgery, Galilee College of Dental Sciences, Naharia, Israel
| | - Mehmet Fatih Şentürk
- Department of Oral and Maxillofacial Surgery, Dentistry Faculty, Ankara Yıldırım Beyazıt University, Ankara, Turkey
| | - P. Elavenil
- Department of Oral & Maxillofacial Surgery, SRM Dental College, Ramapuram, Chennai, India
| | - Kishore Moturi
- Joint International Consortium on Oral Orthotic Occlusal Appliance Therapy for Temporomandibular Joint Disorders, TMJ Foundation, TMJ Consultancy Services, Bhopal, Madhya Pradesh India
- Department of Oral and Maxillofacial Surgery, Vishnu Dental College, Bhimavaram, India
| | - P. Anantanarayanan
- Department of Oral and Maxillofacial Surgery, Meenakshi Ammal Dental College and Hospital, Chennai, Tamil Nadu India
| | - Preeti G. Bhargava
- Joint International Consortium on Oral Orthotic Occlusal Appliance Therapy for Temporomandibular Joint Disorders, TMJ Foundation, TMJ Consultancy Services, Bhopal, Madhya Pradesh India
- Department of Oral & Maxillofacial Surgery, TMJ Consultancy Services, Bhopal, Madhya Pradesh India
| | - Vankudoth Dal Singh
- Joint International Consortium on Oral Orthotic Occlusal Appliance Therapy for Temporomandibular Joint Disorders, TMJ Foundation, TMJ Consultancy Services, Bhopal, Madhya Pradesh India
- Department of Oral and Maxillofacial Surgery, Lenora Institute of Dental Sciences, Rajahmundry, India
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10
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Stone R. Treatment planning for patients with tooth wear. Br Dent J 2023; 235:190-196. [PMID: 37563386 DOI: 10.1038/s41415-023-6116-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Providing restorative dental care for patients with tooth wear can, at times, seem complex and demanding. The key to this process lies in a systematic approach that breaks down the component parts. In this chapter, the importance of a comprehensive assessment at the outset will be highlighted. This should include identification of the patient's chief complaint, taking a thorough history, completing the clinical examination, undertaking any special tests and arriving at clinical diagnoses. Together, this information will influence the treatment planning process, identify appropriate treatment concepts and options available and the individual stages that may be involved. The process should be both holistic and thorough to enable the patient and clinician to build a clear pathway and vision. In parallel, and with patient input throughout, it is essential to manage patient expectations as best as possible whilst remaining pragmatic and honest about treatment outcomes, longevity of restorations and the risks of failure.
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Affiliation(s)
- Robert Stone
- UCL Eastman Dental Institute and Private Practice, London, UK.
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11
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Cerda C, Lezcano MF, Marinelli F, Alarcón J, Fuentes R. Determination of Mandibular Position and Mouth Opening in Healthy Patients and Patients with Articular and/or Muscular Pathology: A Pilot Study with 3D Electromagnetic Articulography and Surface Electromyography. J Clin Med 2023; 12:4822. [PMID: 37510936 PMCID: PMC10381668 DOI: 10.3390/jcm12144822] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/26/2023] [Accepted: 05/28/2023] [Indexed: 07/30/2023] Open
Abstract
Temporomandibular disorders (TMDs) are a group of pathologies that affect the temporomandibular joint and its related structures, producing intracapsular and muscular pathologies. The aim of this study is to describe, by electromagnetic articulography (EMA) and simultaneous electromyography (sEMG), the mandibular postural position and mouth opening in healthy patients and with articular and/or muscular pathology. MATERIALS AND METHODS A pilot study was conducted with a sample of sixteen participants aged 18 years or older who attended the TMDs and Orofacial Pain Polyclinic of the University of La Frontera due to TMDs. The physiological inoculation space was evaluated from the mandibular postural position (MPP) with swallowing command and without command, in both healthy patients and patients with articular, muscular, and mixed TMDs, measured simultaneously with EMA and sEMG. An angular measurement of the oral opening was also performed with the data obtained. RESULTS The physiological inoculation space was obtained from the determination of the MPP through the procedures with swallowing command and without command, and different mouth opening degrees were evaluated. CONCLUSIONS Simultaneous position and sEMG records can be produced from EMA, and different characterization variables such as the vertical distance, Euclidean distance, and angle can be obtained.
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Affiliation(s)
- Camila Cerda
- Master Program in Dental Science, Dental School, Universidad de La Frontera, Temuco 4780000, Chile
| | - María Florencia Lezcano
- Cybernetics Laboratory, Department of Bioengineering, Facultad de Ingeniería, Universidad Nacional de Entre Ríos, Oro Verde 3100, Argentina
| | - Franco Marinelli
- Research Centre in Dental Sciences (CICO-UFRO), Dental School, Facultad de Odontología, Universidad de La Frontera, Temuco 4780000, Chile
| | - Josefa Alarcón
- Research Centre in Dental Sciences (CICO-UFRO), Dental School, Facultad de Odontología, Universidad de La Frontera, Temuco 4780000, Chile
- Doctoral Program in Morphological Sciences, Faculty of Medicine, Universidad de La Frontera, Temuco 4780000, Chile
| | - Ramón Fuentes
- Research Centre in Dental Sciences (CICO-UFRO), Dental School, Facultad de Odontología, Universidad de La Frontera, Temuco 4780000, Chile
- Department of Integral Adults Dentistry, Dental School, Facultad de Odontología, Universidad de La Frontera, Temuco 4780000, Chile
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12
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Manfredini D, Thomas DC, Lobbezoo F. Temporomandibular Disorders Within the Context of Sleep Disorders. Dent Clin North Am 2023; 67:323-334. [PMID: 36965934 DOI: 10.1016/j.cden.2022.10.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
This paper provided an overview of the knowledge on the relationship between temporomandibular disorders (TMDs) and the main sleep conditions and disorders of dental interest, namely, sleep bruxism (SB), sleep apnea, and gastroesophageal reflux disease (GERD). It emerged that although the topic of SB as a possible detrimental factor for the stomatognathic structures has been the most studied, evidence is growing that SB, obstructive sleep apnea, and GERD, all belong to a circle of mutually interacting sleep disorders and conditions that, in turn, may be associated with TMDs. The pathophysiology of the cause-and-effect relationships, if existing, has to be elucidated yet.
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Affiliation(s)
- Daniele Manfredini
- Facial Pain Unit, Department of Biomedical Technologies, School of Dentistry, University of Siena, Viale Bracci c/o Policlinico Le Scotte, Siena 53100, Italy.
| | - Davis C Thomas
- Rutgers School of Dental Medicine, 110 Bergen St, Newark, NJ 07103, USA; Eastman Institute of Oral Health, Rochester, NY, USA
| | - Frank Lobbezoo
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Gustav Mahlerlaan 3004, 1081 LA Amsterdam, the Netherlands
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13
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Thomas DC, Briss D, Rossouw PE, Iyer S. Temporomandibular Disorders: Implications in Restorative Dentistry and Orthodontics. Dent Clin North Am 2023; 67:309-321. [PMID: 36965933 DOI: 10.1016/j.cden.2022.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2023]
Abstract
Over the past several decades, the science of restorative/reconstructive dentistry and orthodontics has evolved tremendously, following sound principles passed down from robust literature and scientific rationale. These principles have been solid and instrumental in enhancing dentistry, from a single tooth restoration to complex full-mouth rehabilitations. However, it must be noted that some of the principles and philosophies followed over these decades have been questioned based on the advances in science, technology, and evidence-based medicine. The scenario became complex when clinicians were faced with the question of guidance for optimum joint and muscle health as related to restorative dentistry and orthodontics.
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Affiliation(s)
- Davis C Thomas
- Department of Diagnostic Sciences, Rutgers School of Dental Medicine, 110 Bergen Street, Newark, NJ 07103, USA; Eastman Institute of Oral Health, Rochester, NY, USA.
| | - David Briss
- Department of Orthodontics, Rutgers School of Dental Medicine, 110 Bergen Street, Newark, NJ 07103, USA
| | - Paul Emile Rossouw
- Department of Orthodontics and Dentofacial Orthopedics, Eastman Institute for Oral Health, University of Rochester, 625 Elmwood Avenue, Box 683, Rochester, NY 14620, USA
| | - Shankar Iyer
- Private Practice limited to Prosthodontics, Elizabeth, NJ, USA; Department of Prosthodontics, Rutgers University, 110 Bergen Street, Newark, NJ 07103, USA; Department of Periodontics, Rutgers University, 110 Bergen Street, Newark, NJ 07103, USA
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Wong J, Ong D, Khan A. Interdisciplinary management of an adult patient with significant tooth wear. Aust Dent J 2023; 68:58-69. [PMID: 36214064 DOI: 10.1111/adj.12941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2022] [Indexed: 11/29/2022]
Abstract
Adult patients may present with compromised dentitions which require extensive oral rehabilitation. This case report shows the fulfilment of both functional and aesthetic treatment objectives for a patient with significant tooth wear through carefully planned interdisciplinary management. © 2022 Australian Dental Association.
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Affiliation(s)
- J Wong
- Private Practice, Sunshine Coast, Queensland, Australia
| | - Dcv Ong
- Discipline of Orthodontics, School of Dentistry, University of Queensland, Brisbane, Australia.,Private Practice, Townsville, Australia
| | - A Khan
- Discipline of Prosthodontics, School of Dentistry, University of Queensland, Brisbane, Australia
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Yamamoto Y, Ryu M, Ueda T, Sasaki Y, Sakurai K. Effect of elastic oral appliance chewing on frontal lobe activity. Clin Exp Dent Res 2023; 9:204-211. [PMID: 36625848 PMCID: PMC9932255 DOI: 10.1002/cre2.710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 12/30/2022] [Accepted: 01/02/2023] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVES Chewing increases frontal lobe activity, resulting in improved memory, learning ability, and response reaction time. This study aimed to assess the effects of elastic oral appliance chewing on the activities and functions of the frontal lobe. METHODS The study participants were 15 healthy men with full dentulous (mean age, 27.4 ± 4.1 years). A prospective crossover design was used to assess frontal lobe activities and functions. Changes in frontal lobe activities were measured with near-infrared spectroscopy (NIRS). At baseline, the participants were assessed in the resting state. Changes in channels #7, representing right frontal lobe activities by NIRS, and #10, representing left frontal lobe activities, during the first and second chewing periods in a total of two periods were evaluated. Frontal lobe functions were measured using the Trail Making Test Part A (TMT-A) in the resting state and after elastic oral appliance or gum chewing. These values were compared with each period. RESULTS Elastic oral appliance chewing caused significant differences between the baseline and first chewing periods for channel #7 (p = .032) and significant differences between the baseline and second chewing periods for channels #7 and #10 (p < .001 and p < .001, respectively) using NIRS. Moreover, significant differences were found in the TMT-A results between the resting state and elastic oral appliance chewing (p = .04). CONCLUSIONS Elastic oral appliance chewing improves frontal lobe activities to a level similar to that obtained with gum chewing.
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Affiliation(s)
- Yuu Yamamoto
- Department of Removable Prosthodontics and GerodontologyTokyo Dental CollegeTokyoJapan
| | - Masahiro Ryu
- Department of Removable Prosthodontics and GerodontologyTokyo Dental CollegeTokyoJapan
| | - Takayuki Ueda
- Department of Removable Prosthodontics and GerodontologyTokyo Dental CollegeTokyoJapan
| | - Yoshinori Sasaki
- Department of Removable Prosthodontics and GerodontologyTokyo Dental CollegeTokyoJapan
| | - Kaoru Sakurai
- Department of Removable Prosthodontics and GerodontologyTokyo Dental CollegeTokyoJapan
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Safe and Ultraconservative Rehabilitation of Worn Teeth Patients: How Sectional Clear Aligners May Enhance the Prosthetic Treatment Plan. Case Rep Dent 2022; 2022:8305893. [PMCID: PMC9637473 DOI: 10.1155/2022/8305893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 10/14/2022] [Indexed: 11/07/2022] Open
Abstract
This study describes the clinical workflow for occlusal vertical dimension (OVD) increase in patients showing extensive tooth wear and mild teeth misalignment/crowding. A patient affected by dental erosion and occlusal abnormalities was treated to improve her situation. After ascertaining sound condyle and temporomandibular joint (TMJ) conditions, an OVD increase was sought to provide enough inter-occlusal space for the restorations. The use of TMJ three-dimensional imaging throughout the clinical procedures allowed to objectively track the condyle and disk position and confirm a steady condyle–glenoid cavity relationship before definitive restorations placement. Sectional clear aligner therapy prior to totally additive prosthetic rehabilitation allowed obtaining slight derotation and movements of anterior teeth, thus maximizing sound tissue preservation. Adhesively luted restorations were finally delivered on both anterior and posterior sectors. At the end of the treatment, the pre-operative TMJ balance appeared successfully preserved, and the patient was satisfied with the aesthetic and function achieved.
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Prosthodontic Treatment in Patients with Temporomandibular Disorders and Orofacial Pain and/or Bruxism: A Review of the Literature. PROSTHESIS 2022. [DOI: 10.3390/prosthesis4020025] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Temporomandibular disorders are a group of conditions affecting the temporomandibular joints, the jaw muscles, and related structures. Patients with temporomandibular signs and/or symptoms frequently present with indications for prosthetic treatment. The management of these patients aims to achieve patient comfort, occlusal stability, and the complex restoration of the teeth. The goal of this review is to provide an overview of the relationship between prosthodontics and temporomandibular disorders and/or bruxism with a focus on the cause-and-effect implications and the strategies for planning prosthetic treatments in patients with temporomandibular disorders and/or bruxism.
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18
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Choi DS, Lee DH, Jang I, Cha BK. Camouflage treatment by backward rotation of the mandible for a severe skeletal Class III malocclusion with aplastic anemia: A case report. Korean J Orthod 2022; 52:362-371. [PMID: 36148643 PMCID: PMC9512624 DOI: 10.4041/kjod22.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/31/2022] [Accepted: 05/04/2022] [Indexed: 11/10/2022] Open
Abstract
Orthognathic surgery is the primary treatment option for severe skeletal discrepancy. However, orthodontic camouflage should be considered as an alternative treatment option, considering the risks of surgery. A 19.5-year-old man presented with a severe prognathic mandible with a Class III molar relationship and an anterior crossbite. Orthognathic surgery could be considered because of his severe skeletal discrepancy and mandibular prognathism. However, the anesthetist for orthognathic surgery did not recommend surgery under general anesthesia because of risk factors associated with the patient's aplastic anemia, including bleeding and infections. Thus, a camouflage treatment to promote backward rotation of the mandible via orthodontic extrusion of the posterior teeth was planned. An anterior bite plate, intermaxillary elastics, and fixed orthodontic appliances were used to extrude the posterior teeth and to align the dentition. After 17 months of nonsurgical orthodontic treatment, normal occlusion was achieved, and the facial profile was dramatically improved. This case report describes the dentoskeletal and soft-tissue effects of mandibular rotation and its long-term stability.
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Affiliation(s)
- Dong-Soon Choi
- Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, Korea
| | - Dong-Hyun Lee
- Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, Korea
| | - Insan Jang
- Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, Korea
| | - Bong-Kuen Cha
- Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, Korea
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19
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Response to letter to Editor on "Occlusal re-establishment and clinical complications of resin-bonded fixed partial dental prostheses (RBFPDP) cemented at an increased occlusal vertical dimension (OVD)". J Prosthet Dent 2021; 127:671-672. [PMID: 34924188 DOI: 10.1016/j.prosdent.2021.11.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/18/2021] [Accepted: 11/18/2021] [Indexed: 11/24/2022]
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20
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D’Arcangelo C, Vadini M, Buonvivere M, De Angelis F. Safe clinical technique for increasing the occlusal vertical dimension in case of erosive wear and missing teeth. Clin Case Rep 2021; 9:e04747. [PMID: 34917357 PMCID: PMC8643126 DOI: 10.1002/ccr3.4747] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/29/2021] [Accepted: 08/09/2021] [Indexed: 11/07/2022] Open
Abstract
A safe method to increase the occlusal vertical dimension (OVD) in patients with mild temporomandibular symptoms (such as tenderness upon palpation) is described. After a temporomandibular joint magnetic resonance (MR), an OVD increase was sought, pursuing pure rotational movement without condyle displacement. Prior to definitive rehabilitation, an additional MR confirmed steady and healthy condyle-disc-fossa relationships.
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Affiliation(s)
- Camillo D’Arcangelo
- Department of MedicalOral and Biotechnological ScienceUnit of Restorative Dentistry and EndodonticsSchool of Dentistry“G. D’Annunzio” University of ChietiChietiItaly
| | - Mirco Vadini
- Department of MedicalOral and Biotechnological ScienceUnit of Restorative Dentistry and EndodonticsSchool of Dentistry“G. D’Annunzio” University of ChietiChietiItaly
| | - Matteo Buonvivere
- Department of MedicalOral and Biotechnological ScienceUnit of Restorative Dentistry and EndodonticsSchool of Dentistry“G. D’Annunzio” University of ChietiChietiItaly
| | - Francesco De Angelis
- Department of MedicalOral and Biotechnological ScienceUnit of Restorative Dentistry and EndodonticsSchool of Dentistry“G. D’Annunzio” University of ChietiChietiItaly
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21
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Chadwick JW, Brooks PJ, Singh JM, Lam DK. Prevention of oral and maxillofacial trauma secondary to orofacial dyskinesias associated with anti-N-methyl-D-aspartate receptor encephalitis: a case series. BMC Oral Health 2021; 21:511. [PMID: 34629072 PMCID: PMC8502506 DOI: 10.1186/s12903-021-01783-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 08/19/2021] [Indexed: 11/10/2022] Open
Abstract
Background Anti-N-methyl-d-aspartate receptor encephalitis (anti-NMDARE) is a multi-stage autoimmune-mediated disease associated with a multitude of neuropsychiatric and dysautonomic features. Orofacial dyskinesias are frequently associated with this condition and manifest as abnormal movements of the orofacial musculature. These involuntary movements may result in significant trauma to the oral and maxillofacial complex including the avulsion of the dentition and orofacial lacerations.
Case presentation We describe the course of two female patients with anti-NMDARE in whom significant involuntary self-inflicted maxillofacial trauma was suffered despite the use of complex parenteral sedation regimens. The application of traditional maxillomandibular wiring techniques and pharmacologic strategies, including botulinum toxin, to immobilize the mandible were initially unsuccessful. These difficulties led to the fabrication and wire-based fixation of a patient-specific acrylic oral appliance that maintained the mandible in a depressed position and mitigated all lateral and protrusive movements. Discussion and conclusions These cases illustrate the first known successful use of an appliance-based therapy for managing orofacial dyskinesias in the anti-NMDARE patient population through an adaptation of traditional maxillomandibular fixation techniques. This approach eliminated further orofacial trauma and afforded physicians with safer means to manage and assess patients afflicted with this condition during their protracted intensive care unit admissions.
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Affiliation(s)
- Jeffrey W Chadwick
- Department of Dental Oncology and Maxillofacial Prosthetics, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Room 2-933, Toronto, ON, M5G 2M9, Canada. .,Division of Oral and Maxillofacial Surgery, Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, ON, M5G 1G6, Canada.
| | - Patricia J Brooks
- Department of Dental Oncology and Maxillofacial Prosthetics, Princess Margaret Cancer Centre, University Health Network, 610 University Avenue, Room 2-933, Toronto, ON, M5G 2M9, Canada
| | - Jeffrey M Singh
- Medical-Surgical and Neuro-Intensive Care Unit, Toronto Western Hospital, University Health Network, 399 Bathurst St, Toronto, ON, M5T 2S8, Canada
| | - David K Lam
- Department of Oral and Maxillofacial Surgery, University of the Pacific, Arthur A. Dugoni School of Dentistry, 155 Fifth Street, San Francisco, CA, 94103, USA
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Al-Zahrani MS, Alhassani AA, Zawawi KH. Tooth loss as a potential risk factor for deficient sleep: an analysis of a nationally representative sample of adults in the USA. Sleep Breath 2021; 25:1101-1107. [PMID: 32583273 DOI: 10.1007/s11325-020-02131-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/28/2020] [Accepted: 06/13/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE Sleep deficiency is implicated as a risk factor for several systemic conditions. Loss of teeth has a profound effect on the individual's physiologic and psychologic health and quality of life. This study aimed to assess the association between tooth loss and sleep duration and determine if anterior and/or posterior tooth loss is a significant predictor. METHODS A total of 22,483 individuals ≥ 18 years who participated in the United States National Health and Nutrition Examination Survey (NHANES) 2005-2016 cycles were included. Multinomial logistic regression adjusted for age, gender, race/ethnicity, smoking, diabetes, body mass index, socioeconomic level, education, alcohol, and depression was performed to examine the association between sleep duration and tooth loss. RESULTS Compared to individuals with > 20 remaining teeth, those who were completely edentulous, had 1-10 or 11-20 teeth remaining were more likely to be in the deficient sleep category (OR [95% CI] = 1.59 [1.35-1.87], 1.29 [1.07-1.54], and 1.26 [1.11-1.43], respectively). When the numbers of both missing anterior and posterior teeth were entered in the model, only posterior teeth were significant. There was a 4% increase in the odds of being in the deficient sleep category for each missing posterior tooth (OR [95% CI] = 1.04 [1.02-1.05]). CONCLUSIONS Tooth loss was significantly associated with deficient sleep and posterior tooth loss appeared to be the main contributor. Although further research is needed to clarify the nature of this association, our results suggest that improving oral health might have an impact on overall health and quality of life.
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Affiliation(s)
- Mohammad S Al-Zahrani
- Department of Periodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ahmed A Alhassani
- Department of Periodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Khalid H Zawawi
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.
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Goldstein G, Goodacre C, MacGregor K. Occlusal Vertical Dimension: Best Evidence Consensus Statement. J Prosthodont 2021; 30:12-19. [PMID: 33783090 DOI: 10.1111/jopr.13315] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/27/2020] [Indexed: 01/31/2023] Open
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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Ribeiro AB, Pita MS, Ribeiro AB, Garcia AR, Junqueira Zuim PR. Effect of short-term increase in occlusal vertical dimension on masticatory muscle electrical activities and pressure-to-pain threshold: A crossover clinical study. J Prosthet Dent 2021; 128:970-976. [PMID: 33678437 DOI: 10.1016/j.prosdent.2021.01.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 01/29/2021] [Accepted: 01/30/2021] [Indexed: 11/17/2022]
Abstract
STATEMENT OF PROBLEM Increasing the occlusal vertical dimension (OVD) is a common procedure in clinical practice. However, few studies have assessed the short-term influence of an increased OVD on the masticatory muscles. PURPOSE The purpose of this crossover clinical study was to investigate the effect of increased OVD on the electrical activity of masticatory muscles and the pressure-to-pain threshold (PPT) in asymptomatic participants. MATERIAL AND METHODS Twenty asymptomatic participants (22.7 ±2.39 years of age; 10 men, 10 women) were submitted to an increase in OVD by using interocclusal devices of different thicknesses (3- and 6-mm) for 24 hours. Masticatory muscle activity was assessed with electromyography (EMG), expressed in microvolts (μV), while the participants masticated 2 pieces of latex of different consistency (latex S and H) with and without the device. The PPT was measured with a digital algometer before and after the mastication. The results were assessed by using analysis of variance (ANOVA) and the Tukey honestly significant difference (HSD) test (α=.05). RESULTS The change of OVD did not significantly affect the electrical activity of the muscles. The latex of hard consistency (latex H) showed higher electrical activity values than the soft texture (latex S). For the working side anterior temporal muscle, a change in the PPT was detected on the day the 6-mm-device was inserted, but for the other muscles, device thickness and latex mastication did not change the PPT. CONCLUSIONS For a short time, an increase in occlusal vertical dimension did not affect the electrical activity in the masticatory muscles or pressure-to-pain threshold in asymptomatic participants.
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Affiliation(s)
- Adriana Barbosa Ribeiro
- Collaborator Professor, Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil.
| | - Murillo Sucena Pita
- Post-doctoral Research Fellow, Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Aline Barbosa Ribeiro
- Post-doctoral Research Fellow, Department of Physiology, Ribeirão Preto Medical School, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Alício Rosalino Garcia
- Associate Professor, Department of Dental Materials and Prosthodontics, School of Dentistry of Araçatuba, São Paulo State University - UNESP, Araçatuba, SP, Brazil
| | - Paulo Renato Junqueira Zuim
- Associate Professor, Department of Dental Materials and Prosthodontics, School of Dentistry of Araçatuba, São Paulo State University - UNESP, Araçatuba, SP, Brazil
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Lim TW, Ab Ghani SM, Mahmud M. Occlusal re-establishment and clinical complications of resin-bonded fixed partial dental prostheses cemented at an increased occlusal vertical dimension: A retrospective study. J Prosthet Dent 2020; 127:258-265. [PMID: 33279159 DOI: 10.1016/j.prosdent.2020.06.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 06/29/2020] [Accepted: 06/29/2020] [Indexed: 11/19/2022]
Abstract
STATEMENT OF PROBLEM Resin-bonded fixed partial dental prostheses (RBFPDPs) cemented at an increased occlusal vertical dimension (OVD) (the Dahl concept) to create space for a metal retainer remain controversial because of the lack of reported clinical studies. This study evaluated RBFPDPs by applying the Dahl concept. PURPOSE The purpose of this retrospective study was to investigate the clinical factors affecting the occlusal re-establishment and short-term complications of RBFPDPs cemented at an increased OVD. MATERIAL AND METHODS Occlusal re-establishment and clinical complications were reviewed in 109 participants (155 RBFPDPs) treated at the Faculty of Dentistry, Universiti Teknologi MARA from January 2013 to May 2018. Types of complications and risk factors were assessed from clinical data. Demographic factors, clinical factors, and prosthesis factors were distinguished and their association with occlusal re-establishment analyzed by using multiple regression analysis. RESULTS A total of 155 RBFPDPs (42 anterior, 113 posterior) were placed in 109 participants. All achieved occlusal re-establishment, 89.9% complete occlusal re-establishment and 10.1% partial occlusal re-establishment, a minimum of 4 months after the RBFPDPs had been placed at an increased OVD. The design of the metal retainer coverage was found to be a significant factor affecting occlusal re-establishment and decementation (P<.05). Widening of the periodontal ligament space was the most common complication (29.2%). CONCLUSIONS RBFPDPs cemented at an increased OVD can be clinically recommended. The design of the retainer coverage was a significant factor influencing occlusal re-establishment and clinical complications.
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Affiliation(s)
- Tong Wah Lim
- Associate Professor, Centre of Restorative Dentistry Studies, Faculty of Dentistry, Universiti Teknologi MARA, Shah Alam, Malaysia
| | - Siti Mariam Ab Ghani
- Associate Professor, Centre of Restorative Dentistry Studies, Faculty of Dentistry, Universiti Teknologi MARA, Shah Alam, Malaysia
| | - Melati Mahmud
- Lecturer, Centre of Restorative Dentistry Studies, Faculty of Dentistry, Universiti Teknologi MARA, Shah Alam, Malaysia.
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Effect of increasing occlusal vertical dimension on lower facial form and perceived facial esthetics: A digital evaluation. J Prosthet Dent 2020; 126:546-552. [PMID: 32981714 DOI: 10.1016/j.prosdent.2020.07.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/15/2020] [Accepted: 07/16/2020] [Indexed: 11/20/2022]
Abstract
STATEMENT OF PROBLEM Increasing occlusal vertical dimension (OVD) is often indicated in complex prosthodontic rehabilitations to gain restorative space and improve the occlusal relationship and esthetics. The effect of increasing occlusal vertical dimension on lower facial height (distance from subnasale to soft-tissue menton) and perceived facial esthetics is not well understood. PURPOSE The purpose of this clinical study was to investigate the effect of incremental increases in the occlusal vertical dimension on lower facial height and perceived facial esthetics by using a digital approach. MATERIAL AND METHODS Twenty-five participants with Class I jaw relationship and no loss of OVD participated in the study. Custom mandibular devices were digitally designed and 3-dimensionally printed to increase the OVD by 3, 6, and 9 mm in each participant. Three-dimensional facial scans and frontal photographs were made with the participants wearing a specific device to achieve the desired OVD increase. The lower facial height, total facial height (distance between nasion to soft-tissue menton), nasolabial angle, lip width, and lip height were digitally measured on facial scans. All measurements were recorded in a computer-aided design (CAD) software program and were repeated 3 times. Subsequently, frontal photographs of 10 participants were randomly selected for survey. Three groups each of 10 prosthodontists, general dentists, or laypersons participated in the survey and were asked to detect OVD difference in 2 photographs of the same participant and to rank facial esthetics at varying OVDs. One-way repeated measures ANOVA (α=.05) for the facial measurements and descriptive statistics for the survey results were used. RESULTS Lower facial height, the ratio of lower facial height to total facial height, lip height, and nasolabial angle increased with an OVD increase, whereas lip width decreased (P<.001). Bonferroni corrected paired t tests revealed all groups of OVD increase to be significantly different from each other (P<.001) except for an OVD increase to 6 mm versus 9 mm in lip height (P=.540) and lip width (P=.019), respectively. Prosthodontists, general dentists, and laypersons could detect a +3 mm OVD increase 63.9%, 62.5%, and 56.5% of the time, respectively. The participants' original OVD was considered the most esthetic (60.0%, 45.0%, and 68.0%) by prosthodontists, general dentists, and laypersons, respectively. CONCLUSIONS Increased OVD increases lower facial height, the ratio of lower facial height to total facial height, lip height, and nasolabial angle but decreases lip width. Prosthodontists are more sensitive to a smaller increase in OVD, closely followed by general dentists and then laypersons. In case of no loss of OVD, a vertical increase as small as 3 mm can be detected by both dentists and the general public and perceived as less esthetic. The larger the increase in OVD, the more detectable the difference and the less the faces are perceived as esthetic.
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Kaya MS, Kınay Taran P, Bakkal M. Temporomandibular dysfunction assessment in children treated with the Hall Technique: A pilot study. Int J Paediatr Dent 2020; 30:429-435. [PMID: 31991506 DOI: 10.1111/ipd.12620] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 01/08/2020] [Accepted: 01/22/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND The Hall technique (HT) involves the placement of stainless steel crowns for treating asymptomatic carious primary teeth without tooth preparation or caries excavation. AIM To investigate whether temporomandibular dysfunction (TM-D) manifests in children after HT. DESIGN Healthy children (age: 5-9 years) with dentin caries were treated with HT in a university clinic, and TM-D signs and symptoms were monitored in this cohort clinical trial. The primary outcome was TM-D signs recorded using the clinical dysfunction index (Di) at pre-treatment: 0-, 1-, 3-, 6-, and 12-month follow-up visits. The secondary outcome was TM-D symptoms recorded using a questionnaire. The Di and symptoms were compared over time using McNemar's tests. RESULTS Thirty-nine children were followed for 12 months after HT treatment. Four children were detected as having dysfunction signs throughout the study: muscle pain on palpation and clicking. The symptoms 'hearing a sound within the jaw joint' or 'bite felt uncomfortable or unusual' were reported by another four children. The Di and TM-D symptoms were not significantly different between pre-treatment and follow-up visits (P > .05). CONCLUSIONS The HT does not seem to be connected to TM-D. Alternative TM-D assessment tools for studying non-persistent symptoms more comprehensively might be useful for future studies.
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Affiliation(s)
- Mustafa Sarp Kaya
- Faculty of Dentistry, Department of Pediatric Dentistry, Bezmialem Vakif University, İstanbul, Turkey
| | - Pınar Kınay Taran
- Faculty of Dentistry, Department of Pediatric Dentistry, Bezmialem Vakif University, İstanbul, Turkey
| | - Meltem Bakkal
- Faculty of Dentistry, Department of Pediatric Dentistry, Bezmialem Vakif University, İstanbul, Turkey
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Güth JF, Erdelt K, Keul C, Burian G, Schweiger J, Edelhoff D. In vivo wear of CAD-CAM composite versus lithium disilicate full coverage first-molar restorations: a pilot study over 2 years. Clin Oral Investig 2020; 24:4301-4311. [PMID: 32399736 PMCID: PMC7666668 DOI: 10.1007/s00784-020-03294-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 04/17/2020] [Indexed: 12/02/2022]
Abstract
Objectives To present a digital approach to measure and compare material wear behavior of antagonistic first molar restorations made of an experimental CAD/CAM composite (COMP) and lithium disilicate ceramic (LS2) in patients with reconstructed vertical dimension of occlusion (VDO) after generalized hard tissue loss. Methods A total of 12 patients underwent complete full jaw rehabilitation with full occlusal coverage restorations made either of COMP or LS2. The first molar restorations (n = 48) were chosen for wear examination. At annual recall appointments, polyether impressions were taken, and resulting plaster casts were digitalized using a laboratory scanner. Mean observation period was 371 days for first and 769 days for second year. The resulting 96 datasets were analyzed by superimposition of 3-D datasets using an iterative best-fit method. Based on the superimposition data, the wear rates of the occlusal contact areas (OCAs) were calculated. Results For antagonistic restorations made of COMP, the average wear rate was 24.8 ± 13.3 μm/month, while for LS2, it was 9.5 ± 4.3 μm/month in first year, with significant differences (p < 0.0001) between the materials. In second year, monthly wear rates decreased significantly for both materials: COMP (16.2 ± 10.7 μm/month) and LS2 (5.5 ± 3.3 μm/month). Statistical comparison between wear time showed significant differences for both materials: COMP p < 0.037 and LS2 p < 0.001. A logarithmic fit (COMP R2 = 0.081; LS2 R2 = 0.038) of the data was calculated to estimate the wear progression. Significance In patients with reconstructed VDO, restorations made of LS2 show a more stable wear behavior than ones out of experimental CAD/CAM composite. In cases of complete rehabilitation, load bearing CAD/CAM-composite restorations should be critically considered for application due to their occlusal wear behavior. However, when choosing a restorative material, not only the functional occlusal stability should be taken into account but also the prospect of minimally invasive treatment with maximum preservation of natural tooth structures.
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Affiliation(s)
- Jan-Frederik Güth
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Kurt Erdelt
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Christine Keul
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Gintare Burian
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Josef Schweiger
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
| | - Daniel Edelhoff
- Department of Prosthetic Dentistry, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany
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Viana MM, do Amaral SF, Nakao E, Rodrigues MC. Conservative approach to the restoration of vital teeth affected by severe tissue wear. J Prosthet Dent 2020; 123:191-195. [DOI: 10.1016/j.prosdent.2018.10.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 10/15/2018] [Accepted: 10/15/2018] [Indexed: 11/28/2022]
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Wang Y, Cen W, Huang JQ, Wei HW. Unconventional implant strategy for patients with a limited interocclusal space in the posterior region: a case report. BMC Oral Health 2019; 19:214. [PMID: 31533720 PMCID: PMC6751649 DOI: 10.1186/s12903-019-0907-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 09/05/2019] [Indexed: 11/24/2022] Open
Abstract
Background Implant prostheses require sufficient interocclusal space. In cases of limited interocclusal space, reducing or extracting over-erupted opposing teeth, orthodontic intrusion, or surgical reconstruction of the edentulous space are commonly used to restore the interocclusal space. However, there are disadvantages to these approaches. Case presentation The present case report describes a patient with a limited interocclusal space managed using an unconventional implant strategy. Conclusions The patient presented satisfactory outcomes without any signs of implant failure, suggesting that the unconventional implant treatment strategy is a useful option for patients with a limited interocclusal space in the posterior region. This unconventional implant surgery provides a minimally invasive treatment alternative.
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Affiliation(s)
- Yi Wang
- Department of Oral Implantology, The Fourth Affiliated Hospital of Nanchang University, School of Medicine, Nanchang University, No. 133 Guang-Chang-Nan Road, Nanchang, China
| | - Wen Cen
- Department of Oral Implantology, The Fourth Affiliated Hospital of Nanchang University, School of Medicine, Nanchang University, No. 133 Guang-Chang-Nan Road, Nanchang, China
| | - Jiang-Qin Huang
- Department of Oral Implantology, The Fourth Affiliated Hospital of Nanchang University, School of Medicine, Nanchang University, No. 133 Guang-Chang-Nan Road, Nanchang, China
| | - Hong-Wu Wei
- Department of Oral Implantology, The Fourth Affiliated Hospital of Nanchang University, School of Medicine, Nanchang University, No. 133 Guang-Chang-Nan Road, Nanchang, China.
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Morata C, Pizarro A, Gonzalez H, Frugone-Zambra R. A craniometry-based predictive model to determine occlusal vertical dimension. J Prosthet Dent 2019; 123:611-617. [PMID: 31383526 DOI: 10.1016/j.prosdent.2019.05.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 04/25/2019] [Accepted: 05/14/2019] [Indexed: 10/26/2022]
Abstract
STATEMENT OF PROBLEM Craniometry is a method of determining the occlusal vertical dimension (OVD); the current prediction models do not consider factors such as facial type and sex or normalizing the OVD by using 1 main variable. PURPOSE The purpose of this clinical study was to determine whether sex, facial type, and age can influence the creation of a predictive model by using the right or left eye-to-ear distance to determine the OVD in dentate and edentate individuals. MATERIAL AND METHODS Healthy individuals (N=385) (238 women, 147 men) aged between 18 and 50 years were classified according to sex, age, and facial type. A single operator recorded all distances in millimeters between the anatomic landmarks proposed by Knebleman (nose-to-chin and right and left eye-to-ear distances) by using a computer numerical control (CNC) machined aluminum anatomic gauge. Measurements were converted into z-scores to determine abnormal values (±3 standard deviations criteria). The Pearson correlation coefficient was calculated for each facial type and for the entire sample between nose-to-chin and the right and left eye-to-ear distances. Multiple regression analysis was performed to establish the dependence of the measured variables on the OVD and the development of a further predictive model (α=.05). RESULTS According to the z-scores of the measured distances, 4 participants were discarded, leaving a final sample of 381 participants (237 women, 144 men; 115 leptoprosopic, 164 mesoprosopic, 102 euryprosopic). The left eye-to-ear distance showed a better correlation with the nose-to-chin distance (leptoprosopic r=0.54, mesoprosopic r=0.60, euryprosopic r=0.55, total sample=0.56) than the right eye-to-ear distance (leptoprosopic r=0.48, mesoprosopic r=0.56, euryprosopic r=0.54, total sample=0.51). Multiple regression analysis revealed that age was not a predictive variable (P=.57), that OVD depended on sex (P<.001) and facial type (P<.01), and that women had shorter OVD than men, as well as more euryprosopic faces than leptoprosopic faces. Using these relationships, the following equation to determine OVD was constructed as a model: OVD=42.17+(0.46×left eye-to-ear distance)+sex (women=-3.38, men=0)+facial type (leptoprosopic=0, mesoprosopic=-1.19, euryprosopic=-2.19). CONCLUSIONS OVD depends on facial type and sex, both of which are craniometric variables. This study proposed a baseline method of determining OVD by using the left eye-to-ear distance as an initial reference that involves a straightforward mathematical calculation.
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Affiliation(s)
- Claudio Morata
- Professor, Faculty of Dentistry, Pedro de Valdivia Univerisity, Santiago, Chile.
| | - Andrea Pizarro
- Professor, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Hector Gonzalez
- Professor, Faculty of Dentistry, San Sebastián University, Santiago, Chile
| | - Raúl Frugone-Zambra
- Professor, Dental School, Institute of Multidisciplinary Research in Science and Technology, University of La Serena, La Serena, Chile
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Racich MJ. Occlusion, temporomandibular disorders, and orofacial pain: An evidence-based overview and update with recommendations. J Prosthet Dent 2018; 120:678-685. [DOI: 10.1016/j.prosdent.2018.01.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 01/25/2018] [Accepted: 01/25/2018] [Indexed: 12/13/2022]
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Comparison of clinical and electromyographic rest vertical dimensions in dolichofacial and brachyfacial young adults: A cross-sectional study. J Prosthet Dent 2018; 120:513-519. [DOI: 10.1016/j.prosdent.2017.11.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Revised: 11/22/2017] [Accepted: 11/22/2017] [Indexed: 11/23/2022]
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Mitteilungen DGKFO. J Orofac Orthop 2018. [DOI: 10.1007/s00056-018-0152-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Nguyen MS, Saag M, Voog-Oras Ü, Nguyen T, Jagomägi T. Temporomandibular Disorder Signs, Occlusal Support, and Craniofacial Structure Changes Among the Elderly Vietnamese. J Maxillofac Oral Surg 2018; 17:362-371. [PMID: 30034156 DOI: 10.1007/s12663-017-1057-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 11/20/2017] [Indexed: 11/25/2022] Open
Abstract
Objective The aim of study was to determine the association between signs of temporomandibular disorders (TMD), occlusal support, and alterations in the craniofacial structure of elderly Vietnamese by using cephalometric analysis. Methods The cross-sectional study consisted of 244 participants aged 65-74 years. Participants were examined for signs of TMD, including limited mouth opening, temporomandibular joint (TMJ) crepitus, TMJ tenderness, and muscle tenderness. Dentition was divided into four occlusal support zones based on occluding pairs of posterior teeth by using Eichner's classification: Class A = 4 support zones; Class B = 1-3 support zones or only contact in anterior teeth; Class C = 0 support zones. Fifteen angular and seven linear parameters were used for sagittal craniofacial skeleton analysis. Results 10.3% of participants had limited mouth opening, 49.6% TMJ crepitus, 16.3% TMJ tenderness, and 24.2% muscle tenderness; 45.5% had Class A occlusal support, 38.5% Class B, and 16.0% Class C. Those with Class C had significantly smaller ramus inclination, articular angle, and angles formed by the mandibular plane and shorter facial height compared to Class A and Class B (P < .001). TMD signs were significantly associated with: angles formed by mandibular plane, gonial angle, cranial base angle, effective mandibular length, and anterior facial height (P < .05). Conclusions The alteration of craniofacial structures was significantly associated with TMD signs among elderly Vietnamese. The higher number of lost occlusal support zones, the more significant the changes to craniofacial structures.
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Affiliation(s)
- Minh Son Nguyen
- 1Institute of Dentistry, University of Tartu, 6 Raekoja Plats, 51003 Tartu, Estonia
- 2Department of Prosthodontics, Danang University of Medical Technology and Pharmacy, 99 Hung Vuong, Danang, 550000 Vietnam
| | - Mare Saag
- 1Institute of Dentistry, University of Tartu, 6 Raekoja Plats, 51003 Tartu, Estonia
| | - Ülle Voog-Oras
- 1Institute of Dentistry, University of Tartu, 6 Raekoja Plats, 51003 Tartu, Estonia
| | - Toai Nguyen
- 3Hue University of Medicine and Pharmacy, 06 Ngo Quyen, Hue, 530000 Vietnam
| | - Triin Jagomägi
- 1Institute of Dentistry, University of Tartu, 6 Raekoja Plats, 51003 Tartu, Estonia
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Ergun G, Ataol AS. An Interdisciplinary Approach for Hypoplastic Amelogenesis Imperfecta: A Case Report. Open Dent J 2018; 12:466-475. [PMID: 29988328 PMCID: PMC6018135 DOI: 10.2174/1874210601812010466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 05/20/2018] [Accepted: 05/24/2018] [Indexed: 11/22/2022] Open
Abstract
Introduction:
Generally, the appropriate rehabilitation concepts of patients with Amelogenesis Imperfecta (AI) should include a multidisciplinary treatment approach.
Case Report:
This case report describes full mouth rehabilitation of a patient with AI. A 20 years old woman was referred to our clinic with a chief complaint of tooth discoloration, diastema, unsatisfactory esthetics and slight tooth sensitivity. Clinical, histological and radiographic examination revealed hypoplastic AI. Short crowns, diastema, occlusal wear with exposed dentin in the posterior areas, the lack of contact points, dental caries and discoloration were the other clinical findings.
Results:
As a result of the periodontal and prosthetic evaluation, gingivectomy and ostectomy were planned, and they followed a full mouth fixed prosthetic restoration.
Conclusion:
There was no complication or complaint in a 3-year follow-up. At the end of this follow-up period, the patient was satisfied with esthetics, function and phonation properties of her prostheses.
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Integrating hinge axis approximation and the virtual facial simulation of prosthetic outcomes for treatment with CAD-CAM immediate dentures: A clinical report of a patient with microstomia. J Prosthet Dent 2018; 119:879-886. [DOI: 10.1016/j.prosdent.2017.06.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 06/01/2017] [Accepted: 06/01/2017] [Indexed: 11/22/2022]
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Temporomandibular Disorders: "Occlusion" Matters! Pain Res Manag 2018; 2018:8746858. [PMID: 29861806 PMCID: PMC5976904 DOI: 10.1155/2018/8746858] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 03/17/2018] [Accepted: 04/11/2018] [Indexed: 01/30/2023]
Abstract
By analogy with the journal's title Pain Research and Management, this review describes TMD Research and Management. More specific are the (1) research aspects of “occlusion,” still one of the most controversial topics in TMD, and (2) as much as possible evidence-based management aspects of “TMD” for the dental practitioner. Research. The disorders temporomandibular dysfunction and the synonymous craniomandibular dysfunction are still being discussed intensely in the literature. Traditionally, attention is mostly devoted to occlusion and its relationship with these disorders. The conclusions reached are often contradictory. Considering the definitions of temporomandibular and craniomandibular dysfunctions/disorders and “occlusion,” a possible explanation for this controversy can be found in the subsequent methodological problems of the studies. Based on a Medline search of these terms over the past 40 years related to contemporary terms such as “Evidence Based Dentistry” and “Pyramid of Evidence,” these methodological aspects are examined, resulting in recommendations for future research and TMD-occlusal therapy. Management. To assist the dental practitioner in his/her daily routine to meet the modern standards of best practice, 7 guidelines are formulated that are explained and accompanied with clinical examples for an evidence-based treatment of patients with this disorder in general dental practices.
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Lima APB, Vitti RP, Amaral M, Neves ACC, da Silva Concilio LR. Effect of polymerization method and fabrication method on occlusal vertical dimension and occlusal contacts of complete-arch prosthesis. J Adv Prosthodont 2018; 10:122-127. [PMID: 29713432 PMCID: PMC5917103 DOI: 10.4047/jap.2018.10.2.122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 10/30/2017] [Accepted: 12/05/2017] [Indexed: 11/08/2022] Open
Abstract
PURPOSE This study evaluated the dimensional stability of a complete-arch prosthesis processed by conventional method in water bath or microwave energy and polymerized by two different curing cycles. MATERIALS AND METHODS Forty maxillary complete-arch prostheses were randomly divided into four groups (n = 10): MW1 - acrylic resin cured by one microwave cycle; MW2 - acrylic resin cured by two microwave cycles: WB1 - conventional acrylic resin polymerized using one curing cycle in a water bath; WB2 - conventional acrylic resin polymerized using two curing cycles in a water bath. For evaluation of dimensional stability, occlusal vertical dimension (OVD) and area of contact points were measured in two different measurement times: before and after the polymerization method. A digital caliper was used for OVD measurement. Occlusal contact registration strips were used between maxillary and mandibular dentures to measure the contact points. The images were measured using the software IpWin32, and the differences before and after the polymerization methods were calculated. The data were statistically analyzed using the one-way ANOVA and Tukey test (α = .05). RESULTS he results demonstrated significant statistical differences for OVD between different measurement times for all groups. MW1 presented the highest OVD values, while WB2 had the lowest OVD values (P<.05). No statistical differences were found for area of contact points among the groups (P=.7150). CONCLUSION The conventional acrylic resin polymerized using two curing cycles in a water bath led to less difference in OVD of complete-arch prosthesis.
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Affiliation(s)
- Ana Paula Barbosa Lima
- Department of Prosthodontics, Dentistry School, University of Taubaté, Taubaté, SP, Brazil
| | - Rafael Pino Vitti
- Department of Prosthodontics, Dentistry School, University of Taubaté, Taubaté, SP, Brazil
| | - Marina Amaral
- Department of Prosthodontics, Dentistry School, University of Taubaté, Taubaté, SP, Brazil
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Jeon HM, Ahn YW, Jeong SH, Ok SM, Choi J, Lee JY, Joo JY, Kwon EY. Pattern analysis of patients with temporomandibular disorders resulting from unilateral mastication due to chronic periodontitis. J Periodontal Implant Sci 2017; 47:211-218. [PMID: 28861285 PMCID: PMC5577439 DOI: 10.5051/jpis.2017.47.4.211] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 07/12/2017] [Indexed: 11/22/2022] Open
Abstract
Purpose The purpose of the present study was to perform a pattern analysis in patients with temporomandibular disorder (TMD) resulting from unilateral mastication due to chronic periodontitis. Methods Thirty participants with signs or symptoms of TMD who engaged in unilateral mastication due to periodontitis-related discomfort (test group) were selected. Another 30 subjects exhibiting signs or symptoms of TMD resulting from unilateral mastication not due to chronic periodontitis (control group) were also recruited. An interview-based questionnaire was administered, and an examination of the temporomandibular joint (TMJ) with determination of periodontal status was performed. Results The duration of unilateral mastication was significantly longer in the control group than in the test group. There was a significant negative correlation between the duration of unilateral mastication and the Community Periodontal Index score. Using the Research Diagnostic Criteria for TMD (RDC/TMD) axis I algorithms, all the subjects were assigned to 3 main groups. The test group exhibited significantly a higher diagnostic distribution of group III (arthralgia, osteoarthritis, or osteoarthrosis), and in both the test and control groups, the number of diagnoses was larger for the non-chewing side. The control group showed a significantly higher diagnostic distribution of group I (myofacial pain), and in both the test and control groups, the number of diagnoses was larger for the chewing side. Conclusions The results of the present study indicate that unilateral mastication due to chronic periodontitis could induce not only pain but also structural TMJ changes if adequate treatment is not administered and supported within a short time from the onset of the condition. Therefore, immediate treatment of chronic periodontitis is recommended to prevent not only the primary progress of periodontal disease, but also secondary TMJ-related problems. Furthermore, subjects who have suffered chronic long-term periodontitis without treatment should be urged to undergo a TMJ examination.
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Affiliation(s)
- Hye-Mi Jeon
- Dental Clinic Center, Pusan National University Hospital, Busan, Korea
| | - Yong-Woo Ahn
- Department of Oral Medicine, Pusan National University School of Dentistry, Yangsan, Korea
| | - Sung-Hee Jeong
- Department of Oral Medicine, Pusan National University School of Dentistry, Yangsan, Korea
| | - Soo-Min Ok
- Department of Oral Medicine, Pusan National University School of Dentistry, Yangsan, Korea
| | - Jeomil Choi
- Department of Periodontology, Pusan National University School of Dentistry, Yangsan, Korea
| | - Ju-Youn Lee
- Department of Periodontology, Pusan National University School of Dentistry, Yangsan, Korea
| | - Ji-Young Joo
- Department of Periodontology, Pusan National University School of Dentistry, Yangsan, Korea
| | - Eun-Young Kwon
- Dental Clinic Center, Pusan National University Hospital, Busan, Korea.,Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
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Hahnel S, Scherl C, Rosentritt M. Interim rehabilitation of occlusal vertical dimension using a double-crown-retained removable dental prosthesis with polyetheretherketone framework. J Prosthet Dent 2017. [PMID: 28641822 DOI: 10.1016/j.prosdent.2017.02.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Polyetheretherketone (PEEK) is a polymeric material that has recently been introduced in dentistry and can be used as framework material for fixed and removable dental prostheses. This clinical report describes the fabrication of a double-crown-retained prosthesis with a PEEK framework in a patient with a substantially diminished occlusal vertical dimension. The insertion of the removable dental prosthesis with a PEEK framework resulted in the functional and esthetic rehabilitation of the patient; however, removable dental prostheses fabricated from PEEK should currently be regarded as interim restorations because of the limited available scientific evidence.
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Affiliation(s)
- Sebastian Hahnel
- Associate Clinical Professor, Department of Prosthetic Dentistry, University Hospital Regensburg, Regensburg, Germany.
| | - Christian Scherl
- Master Dental Technician, Dental laboratory, Poljakow and Mueller, Regensburg, Germany
| | - Martin Rosentritt
- Associate Professor and Engineer, Department of Prosthetic Dentistry, University Hospital Regensburg, Regensburg, Germany
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42
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Donovan TE, Marzola R, Murphy KR, Cagna DR, Eichmiller F, McKee JR, Metz JE, Albouy JP. Annual review of selected scientific literature: Report of the committee on scientific investigation of the American Academy of Restorative Dentistry. J Prosthet Dent 2016; 116:663-740. [PMID: 28236412 DOI: 10.1016/j.prosdent.2016.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 09/08/2016] [Accepted: 09/08/2016] [Indexed: 02/07/2023]
Abstract
STATEMENT OF PROBLEM It is clear the contemporary dentist is confronted with a blizzard of information regarding materials and techniques from journal articles, advertisements, newsletters, the internet, and continuing education events. While some of that information is sound and helpful, much of it is misleading at best. PURPOSE This review identifies and discusses the most important scientific findings regarding outcomes of dental treatment to assist the practitioner in making evidence-based choices. This review was conducted to assist the busy dentist in keeping abreast of the latest scientific information regarding the clinical practice of dentistry. MATERIAL AND METHODS Each of the authors, who are considered experts in their disciplines, was asked to peruse the scientific literature published in 2015 in their discipline and review the articles for important information that may have an impact on treatment decisions. Comments on experimental methodology, statistical evaluation, and overall validity of the conclusions are included in many of the reviews. RESULTS The reviews are not meant to stand alone but are intended to inform the interested reader about what has been discovered in the past year. The readers are then invited to go to the source if they wish more detail. CONCLUSIONS Analysis of the scientific literature published in 2015 is divided into 7 sections, dental materials, periodontics, prosthodontics, occlusion and temporomandibular disorders, sleep-disordered breathing, cariology, and implant dentistry.
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Affiliation(s)
- Terence E Donovan
- Professor, Biomaterials, University of North Carolina School of Dentistry, Chapel Hill, N.C.
| | | | | | - David R Cagna
- Professor, Advanced Prosthodontics University of Tennessee Health Sciences Center, Memphis, Tenn
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