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Rubió-Ferrer G, Rovira-Lastra B, Khoury-Ribas L, Flores-Orozco EI, Ayuso-Montero R, Martinez-Gomis J. Reference values and reliability of occlusal force distribution and occlusal time measured by the T-Scan system in adults with healthy dentition. J Prosthodont 2024; 33:558-564. [PMID: 38469973 DOI: 10.1111/jopr.13838] [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: 10/23/2023] [Revised: 01/12/2024] [Accepted: 02/22/2024] [Indexed: 03/13/2024] Open
Abstract
PURPOSE Reference values of occlusal characteristics are needed to interpret the data obtained using the T-Scan System. This study aimed to establish reference values for and to assess the reliability of, occlusal force distribution in the maximal intercuspal position and the occlusion time in young adults with healthy dentition. MATERIALS AND METHODS In total 178 adults with natural dentition participated in this retrospective cross-sectional study, of whom 76 performed a retest session. Several occlusal recordings were obtained from each participant using the T-Scan system while asking them to bite two or three consecutive times (multi-bite) or only once (single-bite) at the maximal intercuspal position. The lateral and anteroposterior occlusal force distribution were determined as percentages in the right and posterior teeth . Occlusion time was measured in seconds. After the occlusal force distribution and occlusion time percentiles were calculated, reliability was assessed by the intraclass correlation coefficient. RESULTS The 5th-95th percentiles for occlusal force distribution were 34%-67% on the right teeth and 55%-94% on the posterior teeth. The 90th percentile for multi-bite occlusion time was 0.17 s and for single-bite occlusion time was 0.27 s. The intraclass correlation coefficients for lateral occlusal force distribution, anteroposterior occlusal force distribution, multi-bite occlusion time, and single-bite occlusion time were 0.70, 0.68, 0.58, and 0.67, respectively. CONCLUSIONS This study generated reference values for key occlusal characteristics (occlusal force distribution and occlusion time) when using the T-Scan system. These values showed moderate reliability.
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Affiliation(s)
- Gemma Rubió-Ferrer
- Department of Odontostomatology, Faculty of Medicine and Health Sciences, University of Barcelona, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
| | - Bernat Rovira-Lastra
- Department of Odontostomatology, Faculty of Medicine and Health Sciences, University of Barcelona, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
- Oral Health and Masticatory System Group (Bellvitge Biomedical Research Institute) IDIBELL, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
| | - Laura Khoury-Ribas
- Department of Odontostomatology, Faculty of Medicine and Health Sciences, University of Barcelona, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
- Oral Health and Masticatory System Group (Bellvitge Biomedical Research Institute) IDIBELL, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
| | - Elan Ignacio Flores-Orozco
- Department of Prosthodontics, Faculty of Dentistry, Autonomous University of Nayarit, Tepic, Mexico
- Edificio de la Unidad Académica de Odontología, Ciudad de la Cultura Amado Nervo, Tepic, Nayarit, Mexico
| | - Raul Ayuso-Montero
- Department of Odontostomatology, Faculty of Medicine and Health Sciences, University of Barcelona, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
- Oral Health and Masticatory System Group (Bellvitge Biomedical Research Institute) IDIBELL, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
| | - Jordi Martinez-Gomis
- Department of Odontostomatology, Faculty of Medicine and Health Sciences, University of Barcelona, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
- Oral Health and Masticatory System Group (Bellvitge Biomedical Research Institute) IDIBELL, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
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Mao Z, Bleiel H, Beuer F, Böse MWH, Soetebeer M. Occlusal changes on implant-supported single crowns with one year follow-up after loading: A systematic review and meta-analysis. J Dent 2024; 146:105000. [PMID: 38734300 DOI: 10.1016/j.jdent.2024.105000] [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: 01/29/2024] [Accepted: 04/17/2024] [Indexed: 05/13/2024] Open
Abstract
OBJECTIVE This systematic review evaluated the occlusal changes after loading with implant-supported single crowns. SOURCES An electronic literature search was conducted in PubMed, Embase and Cochrane library for randomized (RCTs) or non-randomized controlled clinical trials (CCTs), with a minimum of 10 patients. STUDY SELECTION Studies reporting the occlusal force changes on implant-supported single crowns - with natural teeth as antagonist - measured at baseline and after loading periods were included. 4 CCTs including 133 ISCs in posterior sites were included for meta-analysis. All analyzed ISCs had no contact at a light bite and a light contact at a heavy bite in MIP at loading (baseline). DATA The relative occlusal forces (ROFs) of each implant-supported single crown (ISC) or control tooth (CT) were extracted. ROFs were defined as percentage of the total occlusal force of the entire dentition at maximum intercuspal position (MIP). A meta-analysis was conducted to compare the ROF changes at different follow-up periods and the weighted mean differences in ROF between ISCs and CTs were pooled and analyzed. The amount of change in ROF was significantly lower in 6 to 12 months after loading comparing the follow-up period between baseline and 6 month (p < 0.05). At baseline and 3-month follow-up, CTs presented significant higher ROF than ISCs (p < 0.05), while no significant difference was found after half year following. CONCLUSIONS This study showed that the ROF changes significantly over time after loading of ISCs. It might prove that the occlusal concept defined at the time of prosthetic delivery changes or adapts naturally over time. CLINICAL SIGNIFICANCE The function of specific implant occlusal concept (no contact at a light bite and a light contact at a heavy bite in MIP) is limited over time and careful monitoring and occlusal adjustments should be recommendable during the first-year follow-up.
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Affiliation(s)
- Zhen Mao
- Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.
| | - Hannah Bleiel
- Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
| | - Florian Beuer
- Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
| | - Mats Wernfried Heinrich Böse
- Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
| | - Maren Soetebeer
- Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
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Kireilyte M, Ancevicius P, Baltrusaityte A, Maciulskiene V, Zekonis G. Temporary Hydrostatic Splint Therapy and Its Effects on Occlusal Forces. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:1051. [PMID: 39064477 PMCID: PMC11279302 DOI: 10.3390/medicina60071051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Revised: 06/11/2024] [Accepted: 06/21/2024] [Indexed: 07/28/2024]
Abstract
Background and objectives: This study analyzed and compared the distribution patterns of occlusal forces using T-Scan III before and after the hydrostatic temporary oral splint (Aqualizer Ultra) therapy in healthy subjects and subjects with temporomandibular disorders (TMDs). Materials and Methods: Fifty-one subjects were divided into groups based on anamnesis and responses to the Fonseca questionnaire. The first group, non-TMDs group (n = 19), and the second group, TMDs group (n = 32), had mild-to-severe TMDs, as identified by the Fonseca questionnaire. The non-TMDs group had an average age of 25.4 years (SD = 4.8, range 20-38) with 15 females (78.95%) and 4 males (21.05%). The TMDs group had an average age of 27.4 years (SD = 7.0, range 22-53) with 25 females (78.125%) and 7 males (21.875%). T-Scan III device was used for occlusal analysis before and after hydrostatic splint usage. Results: Significant differences were observed in the TMDs group for anterior and posterior right percentages of forces before and after hydrostatic splint usage. The analysis of force distribution per sector before and after hydrostatic splint therapy showed no significant differences in the non-TMDs group. Analysis of force distributions in the entire study population before and after hydrostatic splint therapy showed significant differences in the anterior and posterior right regions. Occlusal force increased by 32-56% in the front region and decreased in the posterior area after hydrostatic splint usage. Conclusions: Hydrostatic splint therapy is recommended as a part of full-mouth rehabilitation treatment for all patients regardless of the severity of TMDs.
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Affiliation(s)
- Mante Kireilyte
- Department of Prosthodontics, Faculty of Dentistry, Academy of Medicine, Lithuanian University of Health Sciences, LT-50106 Kaunas, Lithuania; (M.K.)
| | | | - Ausra Baltrusaityte
- Department of Prosthodontics, Faculty of Dentistry, Academy of Medicine, Lithuanian University of Health Sciences, LT-50106 Kaunas, Lithuania; (M.K.)
| | - Vita Maciulskiene
- Department of Dental and Oral Pathology, Faculty of Dentistry, Academy of Medicine, Lithuanian University of Health Sciences, LT-50009 Kaunas, Lithuania
| | - Gediminas Zekonis
- Department of Prosthodontics, Faculty of Dentistry, Academy of Medicine, Lithuanian University of Health Sciences, LT-50106 Kaunas, Lithuania; (M.K.)
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Singh S, Mohan R, Jain RK, Balasubramaniam A. Occlusal Contact Surface Changes and Occlusal Force Distribution Between Vacuum-Formed Retainers and Other Retainers: A Systematic Review. Cureus 2023; 15:e50751. [PMID: 38239549 PMCID: PMC10794790 DOI: 10.7759/cureus.50751] [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: 10/30/2023] [Accepted: 12/18/2023] [Indexed: 01/22/2024] Open
Abstract
The present systematic review was done to assess the available literatures on changes in the number of occlusal contacts (NOC), occlusal contact surface areas, and occlusal force distribution (OFD) with vacuum-formed retainers (VFRs) or clear overlay retainers during retention and to compare them with other retainers. Six electronic databases (Web of Science, Scopus, PubMed, Cochrane Library, Lilacs, and Google Scholar) were searched. Randomized controlled trials (RCTs) and controlled clinical trials (CCTs) reporting on occlusal contact changes with VFRs were included. A total of nine articles were included in this review: three RCTs, five prospective controlled trials (PCTs), and one CCT. The Cochrane risk of bias tool and ROBINS-I tool were used for risk of bias assessment. The three RCTs showed moderate risk of bias, and out of five CCTs, four showed low risk of bias, and one showed moderate risk of bias. One CCT showed a low risk of bias in the ROBINS-I tool. Two out of four studies reported improved occlusal surface area (OSA) with VFRs when assessed at the end of six months and 12 months; one out of four studies reported improved NOC; and one study reported a decrease in OFD anteriorly and an increase in OFD posteriorly after two months of retention. On comparison between the groups, the other retainer groups showed more NOCs compared to VFRs. The limited available evidence suggests an increase in OSA and no change in NOCs and OFD with VFRs during retention. No significant differences between VFRs and other retainers for OSA and OFD were noted, and more NOCs were noted for other retainer groups.
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Affiliation(s)
- Swati Singh
- Orthodontics and Dentofacial Orthopaedics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences Saveetha University, Chennai, IND
| | - Reshma Mohan
- Orthodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences Saveetha University, Chennai, IND
| | - Ravindra Kumar Jain
- Orthodontics and Dentofacial Orthopaedics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences Saveetha University, Chennai, IND
| | - Arthi Balasubramaniam
- Community Dentistry, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences Saveetha University, Chennai, IND
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Abutayyem H, M Annamma L, Desai VB, Alam MK. Evaluation of occlusal bite force distribution by T-Scan in orthodontic patients with different occlusal characteristics: a cross sectional-observational study. BMC Oral Health 2023; 23:888. [PMID: 37986159 PMCID: PMC10662916 DOI: 10.1186/s12903-023-03544-4] [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: 05/13/2023] [Accepted: 10/15/2023] [Indexed: 11/22/2023] Open
Abstract
BACKGROUND The aim of orthodontic treatment, apart from esthetic and functional corrections, is uniform force distribution. Hence Occlusal analysis using a T scan gives scope for a precisely targeted treatment plan. The T-scan evaluation of occlusal force, time, and location of contacts from initial occlusal contact to maximum intercuspation enables the orthodontist to sequentially balance the occlusal forces on the right and left sides through specific treatment plan options. OBJECTIVE The current study aimed to determine the force distribution in the different individuals by using a T-Scan as well as the net discrepancies of forces generated at a maximum intercuspation position in the first molar region between the left and right sides of the mouth. METHODS This is a descriptive-correlational study that was carried out in Ras Al Khaimah College of Dental Sciences clinics and Ajman University clinics from January 2020 to September 2022 by using the convenience sampling technique. The T-scan III Novus was employed in this investigation to record multi-bite scans for several patients. T-scan was utilised to examine various malocclusions. RESULTS The present study consisted of 158 participants. Analysis of Variance (ANOVA) showed that there is a statistically significant difference in the percentage of force between the three types of malocclusions (I, II, and III) on the right molar side (B-16 and B-46) (p < 0.05). Moreover, the overall discrepancy showed a statistically significant difference in the three types of malocclusion classifications (p < 0.05). On the other hand, there was no statistically significant difference in the percentage of force between B-26 and B-36 (p > 0.05). Post hoc analysis showed a statistically significant difference in the percentage of force between malocclusion classes I and III on the right molar, with a mean difference of 4.11190 (p < 0.05). Similarly, there was a statistically significant difference in B-46 between Malocclusion Classes I and II, 4.01806 (p < 0.05). Additionally, post hoc analysis showed a statistically significant difference between malocclusion classes I and III, with a mean difference of -4.79841 (p < 0.05) on the right molar. CONCLUSION The T-Scan is a useful tool for assessing occlusal discrepancies and can be helpful during treatment planning and follow-up, especially for orthognathic surgery patients. A T-scan could be used in orthodontic therapy in a simple and efficient way. Also, it turned out to be a useful tool for diagnosing problems and gave us new information about how therapies work. In this study, T-Scan showed that it can measure occlusal forces in timing in an objective, accurate, and repeated manner. The current study found that T-Scan was better able to report the difference in the percentage of force on the right molar side than on the left side.
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Affiliation(s)
- Huda Abutayyem
- Department of Clinical Sciences, College of Dentistry, Ajman University and Center of Medical and Bioallied Health Sciences, Ajman University, Ajman, United Arab Emirates.
| | - Lovely M Annamma
- Department of Clinical Sciences, College of Dentistry, Ajman University and Center of Medical and Bioallied Health Sciences, Ajman University, Ajman, United Arab Emirates
| | - Vijay B Desai
- Department of Clinical Sciences, College of Dentistry, Ajman University and Center of Medical and Bioallied Health Sciences, Ajman University, Ajman, United Arab Emirates
| | - Mohammad Khursheed Alam
- Orthodontic Division, Preventive Dentistry Department, Jouf University, Sakaka, Aljouf, Saudi Arabia
- Department of Dental Research Cell, Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College and Hospitals, Chennai, 600077, India
- Department of Public Health, Faculty of Allied Health Sciences, Daffodil International University, Dhaka, 1207, Bangladesh
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Fathalla R, Samih H, Abdel Fattah Ramadan A. An In Vivo Study Using T-scan III Occlusal Analysis System: Does the Extraction Pattern Affect the Final Occlusion in Orthodontics? Cureus 2023; 15:e47965. [PMID: 38034277 PMCID: PMC10685985 DOI: 10.7759/cureus.47965] [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] [Accepted: 10/30/2023] [Indexed: 12/02/2023] Open
Abstract
BACKGROUND The assessment of an orthodontic patient's occlusion throughout the treatment and after debonding permits the orthodontist to improve functional occlusion through interventional tooth movements, thus rendering the overall treatment more efficient in terms of stability and masticatory efficiency. This study aimed to evaluate the effect of four first premolar extractions during orthodontic treatment on the distribution of bite force using the T-scan III system (Tekscan Inc., Boston, MA). OBJECTIVE We aim to evaluate the effect of four first premolar extractions during orthodontic treatment on bite force distribution. METHODS Ten patients (mean age: 16 ± 2.72 years), who would be treated orthodontically with four first premolar extractions to treat their teeth crowding, were selected for this study. The T-scan III system was utilized to measure the occlusal bite force of the patients before and after treatment, and the findings were compared. RESULTS There was a non-statistically significant decrease in the occlusal bite force's mean in the arch's anterior segment from 24.45% (± 8.50%) to 14.25% (± 12.93%) after the orthodontic treatment. A non-statistically significant increase in the occlusal bite force in the posterior right segment of the arch from 37.64% (± 18.13%) to 41.65% (± 11.52%) was found after the treatment. The occlusal bite force in the posterior left segment of the arch increased insignificantly from 30.53% (± 20.00%) to 43.95% (± 13.22%). There was an even distribution of bite force on both sides of the arch by the end of the treatment. CONCLUSIONS Orthodontic treatment helps to achieve a functional occlusal balance by assisting in the uniform distribution of biting force on both sides of the arch. There was no statistically significant change in the distribution of bite force recordings collected before and after orthodontic treatment, indicating that the removal of the four first premolar teeth does not impact the functional aspect of occlusion. The T-scan III system serves as an essential guide during orthodontic treatment to monitor occlusal changes.
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Affiliation(s)
- Rim Fathalla
- Department of Orthodontics, Faculty of Dentistry, Suez Canal University, Ismailia, EGY
| | - Hanady Samih
- Department of Orthodontics, Faculty of Dentistry, Suez Canal University, Ismailia, EGY
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Wiechens B, Quast A, Klenke D, Brockmeyer P, Schliephake H, Meyer-Marcotty P. Evaluation of occlusal function during orthognathic therapy : A prospective clinical trial using a digital registration method. J Orofac Orthop 2023; 84:267-277. [PMID: 35226131 PMCID: PMC10462559 DOI: 10.1007/s00056-022-00382-x] [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: 09/10/2021] [Accepted: 01/17/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Reduced occlusal function is a main characteristic of orthognathic patients. The present study aimed to investigate the extent of therapy-induced functional improvements in occlusal function using a digital diagnostic method. METHODS This prospective clinical study included 41 orthognathic patients (24 women and 17 men, median age 27.26 ± 8.2 years) and 10 control patients (5 women and 5 men, median age 29.8 ± 13.5 years) with neutral skeletal and dental configurations. The patients were divided into classes I, II and III based on their cephalometry. Digital occlusal registrations in habitual occlusion in an upright sitting position were taken before (T1) and after (T2) therapy using the T‑Scan Novus (Tekscan, South Boston, MA, USA) application. RESULTS Class II and III patients showed a significantly less efficient occlusal pattern than the untreated controls regarding total antagonism (p < 0.001), time of occlusion (p = 0.004), occlusal asymmetry (p = 0.001), anterior antagonism (p < 0.001) and posterior antagonism (p < 0.001). After therapy, the occlusal pattern increased in both therapy groups, where class III patients became indistinguishable from the controls, and class II patients differed only in posterior antagonism (p = 0.035). CONCLUSIONS The digital occlusal registration method proved to be a useful diagnostic tool and provided new insights into therapeutic effects in orthognathic patients. By precisely adjusting the occlusal function, masticatory performance improved significantly. CLINICAL RELEVANCE Severe malocclusion leads to a significantly lower masticatory performance for patients, which can be improved by orthognathic therapy and captured by digital occlusal registration.
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Affiliation(s)
- Bernhard Wiechens
- Department of Orthodontics, University Medical Center Goettingen, Robert-Koch-Str. 40, 37075, Goettingen, Germany.
| | - Anja Quast
- Department of Orthodontics, University Medical Center Goettingen, Robert-Koch-Str. 40, 37075, Goettingen, Germany
| | - Daniela Klenke
- Department of Orthodontics, University Medical Center Goettingen, Robert-Koch-Str. 40, 37075, Goettingen, Germany
| | - Phillipp Brockmeyer
- Department of Oral and Maxillofacial Surgery, University Medical Center Goettingen, Robert-Koch-Str. 40, 37075, Goettingen, Germany
| | - Henning Schliephake
- Department of Oral and Maxillofacial Surgery, University Medical Center Goettingen, Robert-Koch-Str. 40, 37075, Goettingen, Germany
| | - Philipp Meyer-Marcotty
- Department of Orthodontics, University Medical Center Goettingen, Robert-Koch-Str. 40, 37075, Goettingen, Germany
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Velásquez B, Rodríguez M, Mosquera V, Álvarez E, Chauca L, Mena A. Occlusal Analysis in Natural Dentition: Systematic Review. Eur J Dent 2023; 17:615-622. [PMID: 36252609 PMCID: PMC10569841 DOI: 10.1055/s-0042-1755626] [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: 10/24/2022] Open
Abstract
This study aimed to evaluate the effectiveness of conventional occlusal analysis in contrast with digital occlusal analysis in natural dentition. Occlusal analysis allows the identification of normal and abnormal occlusal contact points that alter the craniomandibular cervical system. We searched for articles with keywords [[dental occlusion]], [[natural dentition]], [[occlusal adjustment]], [[Immediate Complete Anterior Guidance Development]] [[mastication]], [[bite force]], [[premature contact]], [[occlusal balance]] [[articulating paper]]], [[spray]], [[Occlusal contacts]], and [[bite strength]]. They were considered observational , odds ratio and case control studies. We found 189 items. After evaluating the abstracts and full texts of the articles, 10 papers met the inclusion criteria. It was found that occlusal analysis allows the identification of the relationship between poor occlusion and the sensitivity of the teeth due to occlusal trauma, which is also related to temporomandibular joint pain in dynamic occlusion. The contacts of greater strength were observed in nonfunctional cusps, 48%, without ruling out the functional cusps, 24%. Despite being the universal method of occlusal control to date, the use of joint paper, remains subjective compared to the digital occlusal control device. Posture is considered directly related to occlusal trauma and temporomandibular disorders; without proper occlusal analysis, a clear diagnosis of the patient's joint condition cannot be obtained. Digital occlusal analysis is more objective than traditional occlusal analysis.
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Affiliation(s)
- Byron Velásquez
- Department of Prosthesis, School of Dentistry, Universidad de Las Americas, Quito, Ecuador
| | - María Rodríguez
- Department of Prosthesis, School of Dentistry, Universidad de Las Americas, Quito, Ecuador
| | - Verónica Mosquera
- Department of Prosthesis, School of Dentistry, Universidad de Las Americas, Quito, Ecuador
| | - Eddy Álvarez
- Department of Prosthesis, School of Dentistry, Universidad de Las Americas, Quito, Ecuador
| | - Luis Chauca
- Department of Periodontics and Implantology Oral Research, College of Dentistry, Universidad de Guayaquil, Guayaquil, Ecuador
| | - Alexandra Mena
- Departamento de Investigación de Prótesis Dental, Facultad de Odontología, Universidad de Las Américas, UDLACP, Quito, Ecuador
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Wu ML, Lai PY, Cheong F, Zhou WC, Xu SH, Li H, Shen S. Application in the analysis of the occlusal force of free-end missing tooth implant restoration with T-SCAN III. Front Bioeng Biotechnol 2023; 11:1039518. [PMID: 37091346 PMCID: PMC10116052 DOI: 10.3389/fbioe.2023.1039518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 03/07/2023] [Indexed: 04/09/2023] Open
Abstract
Introduction: The occlusal force of the teeth in the dental arch and the remaining adjacent natural teeth will change after implant restoration with a free-end missing tooth. This study intends to use the T-SCAN III scanner to collect dynamic quantitative data before and after the restoration of free-end implants and to explore the application of the T-SCAN III in redistributing the occlusal force of free-end implants.Methods: In this study, 24 patients with free-end implant restoration were selected, and their occlusion was tested before, immediately after, and 3 months after implant restoration.Results: In all 24 cases, the bite force of the first natural tooth adjacent to the implanted tooth after restoration changed from 19.12% ± 9.48%–12.93% ± 11.47% (p < 0.01). For additional data analysis, all cases were further subdivided by single implant and fixed bridge restorations. In 17 cases, there was a successful follow-up after 3 months. The percentage of the total bite force of dental arch with implant increased from 41.92% ± 10.78%–53.06% ± 10.71% (p < 0.01).Discussion: This study shows that the free-end implant restoration protects the remaining natural teeth, and the patient’s missing dental arch bite force improves within 3 months of implant restoration.
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Affiliation(s)
- Ming-Le Wu
- Department of Stomatology, Affiliated Stomatological Hospital of Jinan University (Daliang Hospital Shunde District Foshan City), Foshan City, Guangdong Province, China
| | - Peng-Yu Lai
- School of Stomatology, Jinan University, Guangzhou City, Guangdong Province, China
| | - Fan Cheong
- School of Stomatology, Jinan University, Guangzhou City, Guangdong Province, China
| | - Wen-Cheng Zhou
- School of Stomatology, Jinan University, Guangzhou City, Guangdong Province, China
| | - Sang-Hui Xu
- School of Stomatology, Jinan University, Guangzhou City, Guangdong Province, China
| | - Hui Li
- Department of Otorhinolaryngology and Head Neck Surgery, The First Affiliated Hospital of Jinan University, Guangzhou, China
- *Correspondence: Shan Shen, ; Hui Li,
| | - Shan Shen
- Department of Stomatology, The First Affiliated Hospital of Jinan University, Guangzhou, China
- *Correspondence: Shan Shen, ; Hui Li,
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Wiechens B, Quast A, Klenke D, Brockmeyer P, Schliephake H, Meyer-Marcotty P. Changes in the occlusal function of orthognathic patients with vertical malformations after combined orthodontic surgical therapy: a prospective clinical study. Int J Oral Maxillofac Surg 2023; 52:371-378. [PMID: 35835683 DOI: 10.1016/j.ijom.2022.06.018] [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: 01/10/2022] [Revised: 06/23/2022] [Accepted: 06/24/2022] [Indexed: 11/26/2022]
Abstract
The aim of this study was to assess the changes in occlusal patterns during combined surgical and orthodontic therapy in patients with vertical jaw malformations. Twenty-six orthognathic patients (18 female, eight male; median age 25 years, interquartile range 11.5 years) and 10 control patients (five female, five male; median age 29.8 years, interquartile range 13.5 years) recruited from neutral configured patients attending the Department of Orthodontics, were investigated. Based on cephalometry, the patients were grouped into vertical skeletal configurations of either open, deep, or natural bite cases. Registrations of the occlusal contacts were taken using a digital occlusal sensor immediately before surgery and at 9 months after the surgical intervention. Before the intervention, open and deep bite patients showed significantly less efficient occlusal patterns than the untreated controls regarding total tooth contact (P < 0.001), time of occlusion (P = 0.002), occlusal asymmetry (P = 0.001), anterior tooth contact (P < 0.001), and posterior tooth contact (P < 0.001). After surgery, the parameters in the deep bite patients were similar to those in the controls; however, in open bite patients, total tooth contact (P = 0.003), occlusal asymmetry (P = 0.011), and posterior tooth contact (P = 0.035) differed significantly. In conclusion, combined orthodontic and surgical correction of vertical malocclusions was found to improve occlusal function in patients with deep bite to the level of controls.
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Affiliation(s)
- B Wiechens
- Department of Orthodontics, University Medical Center Göttingen, Göttingen, Germany.
| | - A Quast
- Department of Orthodontics, University Medical Center Göttingen, Göttingen, Germany
| | - D Klenke
- Department of Orthodontics, University Medical Center Göttingen, Göttingen, Germany
| | - P Brockmeyer
- Department of Oral and Maxillofacial Surgery, University Medical Center Göttingen, Göttingen, Germany
| | - H Schliephake
- Department of Oral and Maxillofacial Surgery, University Medical Center Göttingen, Göttingen, Germany
| | - P Meyer-Marcotty
- Department of Orthodontics, University Medical Center Göttingen, Göttingen, Germany
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Alfallaj HA, Afrashtehfar KI, Asiri AK, Almasoud FS, Alnaqa GH, Al-Angari NS. The Status of Digital Dental Technology Implementation in the Saudi Dental Schools' Curriculum: A National Cross-Sectional Survey for Healthcare Digitization. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 20:321. [PMID: 36612639 PMCID: PMC9819993 DOI: 10.3390/ijerph20010321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/20/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Objective: The primary objective of this cross-sectional national study was to investigate the status of digital dental technology (DDT) adoption in Saudi Arabian undergraduate dental education. A secondary objective was to explore the impact of dental schools' funding sources to incorporate digital technologies. Methods: A self-administered questionnaire was distributed to the chairpersons of prosthetic sciences departments of the 27 dental schools in Saudi Arabia. If any department chairman failed to respond to the survey, a designated full-time faculty member was contacted to fill out the form. The participants were asked about the school's sector, DDT implementation in the curriculum, implemented level, their perceptions of the facilitators and challenges for incorporating DDT. Results: Of the 27 dental schools (18 public and 8 private), 26 responded to the questionnaire (response rate: 96.3%). The geographic distribution of the respondent schools was as follows: 12 schools in the central region, 6 in the western region, and 8 in other regions. Seventeen schools secure and preserve patients' records using electronic software, whereas nine schools use paper charts. Seventeen schools (64,4%) implemented DDT in their curricula. The schools that did not incorporate DDT into their undergraduate curricula were due to not being included in the curriculum (78%), lack of expertise (66%), untrained faculty and staff (44%), and cost (33%). Conclusions: This national study showed that digital components still need to be integrated into Saudi Arabian dental schools' curricula and patient care treatment. Additionally, there was no association between funding sources and the DDT implementation into the current curricula. Consequently, Saudi dental schools must emphasize the implementation and utilization of DDT to align with Saudi Vision 2030 for healthcare digitization and to graduate competent dentists in digital dental care.
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Affiliation(s)
- Hayam A. Alfallaj
- Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh P.O. Box 3660, Saudi Arabia
- King Abdullah International Medical Research Center, Riyadh P.O. Box 3660, Saudi Arabia
| | - Kelvin I. Afrashtehfar
- Evidence-Based Practice Unit, Clinical Sciences Department, College of Dentistry, Ajman University, Ajman P.O. Box 346, United Arab Emirates
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Ali K. Asiri
- King Abdullah International Medical Research Center, Riyadh P.O. Box 3660, Saudi Arabia
- Dental Department, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh P.O. Box 22490, Saudi Arabia
- College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh P.O. Box 3660, Saudi Arabia
| | - Farah S. Almasoud
- King Abdullah International Medical Research Center, Riyadh P.O. Box 3660, Saudi Arabia
- Dental Department, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh P.O. Box 22490, Saudi Arabia
- College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh P.O. Box 3660, Saudi Arabia
| | - Ghaida H. Alnaqa
- King Abdullah International Medical Research Center, Riyadh P.O. Box 3660, Saudi Arabia
- Dental Department, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh P.O. Box 22490, Saudi Arabia
- College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh P.O. Box 3660, Saudi Arabia
| | - Nadia S. Al-Angari
- Department of Restorative and Prosthetic Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh P.O. Box 3660, Saudi Arabia
- King Abdullah International Medical Research Center, Riyadh P.O. Box 3660, Saudi Arabia
- Dental Department, King Abdulaziz Medical City, Ministry of National Guard Health Affairs, Riyadh P.O. Box 22490, Saudi Arabia
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12
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In vivo evaluation of the reliability and validity of three digital occlusion analysis methods. J Dent 2022; 127:104355. [PMID: 36332701 DOI: 10.1016/j.jdent.2022.104355] [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: 09/23/2022] [Revised: 10/24/2022] [Accepted: 10/31/2022] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES The reliability and validity of three digital occlusion analysis methods was evaluated in vivo. METHODS The three method evalueated were:scanning of articulating paper marks (SA), dental prescale occlusal analysis system (DP) and a virtual occlusion constructed method (VO). A conventional silicone transmission method (ST) was used as the standard for comparison. Each of the 20 enroled human subjects was tested with the four methods. Retest of each method was performed at 2-week intervals. Occlusal contact area (OCA) and occlusal contact numbers (OCN) were calculated for analyses. For reliability evaluation, intraclass correlation coefficients (ICC) of the OCA and OCN values obtained from each method were compared. For validity evaluation, Pearson correlations coefficients, paired t-tests, regression analysis and Bland-Altman analysis were examined. RESULTS The ICC values of OCA and OCN were in the order: ST>SA>DP>VO. The highest OCA and OCN values were found ST while the lowest values were obtained from DP. Paired t-test identified a significant difference when OCA values obtained from the three digital methods were compared with ST, and between the OCN values of DP and ST. Pearson correlation showed high coefficients between ST and three digital methods (0.583-0.885 for OCA; 0.779-0.836 for OCN). A significant linear correlation was found between the results from ST and those from SA or VO. Bland-Altman analysis showed good agreement between OCN values of SA and ST, and between those of VO and ST. CONCLUSIONS The three digital occlusal analysis methods showed good reliability and validity for in vivo clinical application. CLINICAL SIGNIFICANCE The three digital occlusion analysis systems examined demonstrate good potential in in vivo quantitative analysis, with good reliability and validity. The use of these analytical methods should facilitate digital workflow in clinical practice.
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Huang YF, Wang CM, Shieh WY, Liao YF, Hong HH, Chang CT. The correlation between two occlusal analyzers for the measurement of bite force. BMC Oral Health 2022; 22:472. [PMID: 36335336 PMCID: PMC9636614 DOI: 10.1186/s12903-022-02484-9] [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: 07/10/2022] [Accepted: 09/30/2022] [Indexed: 11/06/2022] Open
Abstract
Background Occlusal force represents masticatory function. Using quantifiable occlusal indicators provides a more objective occlusal force evaluation. In the recent dental practice, digital methods such as the Dental Prescale II (DP2, GC Corp., Tokyo, Japan) and T-scan (T-Scan III v8; Tekscan Inc.) are commonly used in clinics to evaluate treatment outcomes. The T-scan provides the relative bite force (%) compared to the maximal bite force on individual teeth or the unilateral arch. The DP2 can quantify occlusal force, measured in newtons (N), on the half arch or the overall bite, but it is difficult to identify the bite force on an individual tooth. It is difficult to select a device that fulfils all the requirements to record occlusal force. This study aimed to investigate the association between the bite measured by the DPS2 and T-scan to determine whether the measured bite force is comparable through calculation. Methods A total of 80 healthy adults, including 41 women and 39 men with a mean age of 38.2, were requested to bite pressure sensitive film sheets ten minutes apart. Linear regression analysis was used to estimate the measured bite force by the DP2 and T-scan. Results There was a significant positive correlation between the occlusal force measured by the DP2 and T-scan (P < 0.01) when intercept was equal to zero as confounders were adjused. These results provided the comparability of the measured occlusal forces determined by the DP2 and T-scan. Conclusion The estimated bite force determined by DP2 and T-Scan is convertible using the linear equation from this study to increase the value for clinical applications. The estimated bite force from the two quantifiable occlusal indicators are comparable. The two commercially available quantifiable occlusal indicators can be fully adapted to all clinical requirements according to this result.
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Affiliation(s)
- Yi-Fang Huang
- grid.413801.f0000 0001 0711 0593Department of General Dentistry, Chang Gung Memorial Hospital, 33305 Linkou, Taiwan ,grid.412896.00000 0000 9337 0481School of Dentistry, College of Oral Medicine, Taipei Medical University, 11031 Taipei, Taiwan ,grid.145695.a0000 0004 1798 0922Graduate Institute of Dental and Craniofacial Science, College of Medicine, Chang Gung University, 33302 Taoyuan, Taiwan
| | - Chin-Man Wang
- Department of Physical Medicine and Rehabilitation, College of Medicine, Linkou Chang Gung Memorial Hospital, Chang Gung University, 33305 Taoyuan, Taiwan
| | - Wann-Yun Shieh
- grid.145695.a0000 0004 1798 0922Department of Computer Science and Information Engineering, College of Engineering, Chang Gung University, 33302 Taoyuan, Taiwan ,grid.413801.f0000 0001 0711 0593Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, 33302 Taoyuan, Taiwan
| | - Yu-Fang Liao
- grid.413801.f0000 0001 0711 0593Department of Craniofacial Orthodontics, Chang Gung Memorial Hospital, 10507 Taipei, Taiwan ,grid.413801.f0000 0001 0711 0593Craniofacial Center, Chang Gung Memorial Hospital, 33378 Taoyuan, Taiwan ,grid.413801.f0000 0001 0711 0593Craniofacial Research Center, Chang Gung Memorial Hospital, 33305 Linkou, Taiwan ,grid.145695.a0000 0004 1798 0922College of Medicine, Chang Gung University, 33302 Taoyuan, Taiwan
| | - Hsiang-Hsi Hong
- grid.145695.a0000 0004 1798 0922Graduate Institute of Dental and Craniofacial Science, College of Medicine, Chang Gung University, 33302 Taoyuan, Taiwan ,grid.413801.f0000 0001 0711 0593Department of Periodontology, Chang Gung Memorial Hospital, 33305 Linkou, Taiwan
| | - Chung-Ta Chang
- grid.412896.00000 0000 9337 0481School of Dentistry, College of Oral Medicine, Taipei Medical University, 11031 Taipei, Taiwan ,grid.414746.40000 0004 0604 4784Department of Emergency Medicine, Far Eastern Memorial Hospital, No. 21, Sec. 2, Nanya S. Rd., Banciao Dist, 22056 New Taipei, Taiwan ,grid.413050.30000 0004 1770 3669Graduate Institute of Medicine, Yuan Ze University, 32003 Taoyuan, Taiwan
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14
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Tammataratarn P, Chen MC, Lin CH, Wen-Ching Ko E. Sequential digital occlusal analysis in patients with skeletal Class III malocclusion with orthognathic surgery: Surgery-first vs orthodontic-first approach. Am J Orthod Dentofacial Orthop 2022; 162:927-936. [PMID: 36163310 DOI: 10.1016/j.ajodo.2021.07.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 07/01/2021] [Accepted: 07/01/2021] [Indexed: 11/27/2022]
Abstract
INTRODUCTION This study compared changes in occlusal characteristics in patients with skeletal Class III malocclusion with surgery-first approach (SFA) and those with orthodontic-first approach (OFA) through digital occlusal analysis. METHODS In this prospective study, 90 consecutive subjects were divided into control, OFA, and SFA groups (30 per group). Force discrepancy, occlusal time, tooth contact, center of force, and force-time graph pattern were calculated for all samples using the T-Scan III system. Between-group differences were analyzed using a 1-way analysis of variance and generalized estimating equations. These parameters were calculated at the following time points: preoperatively, 1-month postoperatively (T1), 4-months postoperatively, and 1-year postoperatively (T3). RESULTS No significant differences were observed in the parameters between the experimental groups. The force discrepancy of the OFA and SFA groups decreased, approaching the value of controls at T3. The occlusal time significantly increased at T1 and progressively decreased at T3. The initial contact and maximum force were most frequently observed on molars, and its maximum force significantly decreased by 5.72% and 7.40% in the OFA and SFA groups at T3, respectively. The number of tooth contact was significantly reduced at T1 and gradually increased at T3. Moreover, after surgery, the force-time graph pattern was normalized, and the center of force tended to be more centric; however, the most frequent trajectory revealed premature contact during closing. CONCLUSIONS No significant difference was found in all parameters between the OFA and SFA groups. Occlusion deteriorated at 1 month postoperatively but gradually improved at 1 year postoperatively, approaching the controls.
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Affiliation(s)
- Paweena Tammataratarn
- Graduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan, Taiwan; Department of Craniofacial Orthodontics, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Min-Chi Chen
- Department of Public Health and Biostatistics Consulting Center, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Cheng-Hui Lin
- Department of Plastic Surgery and Reconstructive Surgery, Chang Gung Memorial Hospital, and Graduate Institute of Craniofacial and Oral Science, Chang Gung University, Taoyuan, Taiwan
| | - Ellen Wen-Ching Ko
- Graduate Institute of Dental and Craniofacial Science, Chang Gung University, Taoyuan, Taiwan; Department of Craniofacial Orthodontics, Chang Gung Memorial Hospital, Taipei, Taiwan.
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Mazurkiewicz P, Oblizajek M, Rzeszowska J, Sobolewska E, Ey-Chmielewska H, Szymańska-Kozula R. Determining the occlusal plane: a literature review. Cranio 2022; 40:341-347. [PMID: 31851868 DOI: 10.1080/08869634.2019.1703093] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Objective: The purpose of the present review was to demonstrate the utility of articulator systems and link instrumentation in determining the occlusal plane. The impact of the natural head position and anatomical landmarks on the occlusal plane location has been reported in the literature. Properly chosen instrumentation and management methods eliminate errors in determining the occlusal plane.Methods: The PubMed and the Dentistry & Oral Sciences Source (through EbscoHost) databases were searched for ways to minimize the occurrence of errors when registering and determining the occlusal plane location, with or without the use of face-bows. A hand search and citation mining supplemented the results.Results: Overall, 11 original approaches to occlusal plane determination were identified.Discussion: Identified methods of occlusal plane transfer are based on real or virtual solutions. Owing to the large variety of devices, additional comparative studies are needed.
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Affiliation(s)
- Paweł Mazurkiewicz
- Private Practice, Gdańskie Centrum Stomatologiczne filia w Gdyni, Gdynia, Poland
| | - Monika Oblizajek
- Department of Public Health and Social Medicine, Medical University of Gdańsk, Gdańsk, Poland
| | - Julia Rzeszowska
- University Dental Clinic, Pomeranian Medical University, Szczecin, Poland
| | - Ewa Sobolewska
- Department of Dental Prosthetics, Pomeranian Medical University, Szczecin, Poland
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Garcia-Cahuana LN, Martinez-Aparcana JH, Figueroa Pastrana DJ, Atoche-Socola KJ. [The value of an occlusal adjustment: why?, how?, and when? case report]. REVISTA CIENTÍFICA ODONTOLÓGICA 2022; 10:e122. [PMID: 38389550 PMCID: PMC10880705 DOI: 10.21142/2523-2754-1003-2022-122] [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: 07/27/2022] [Accepted: 09/06/2022] [Indexed: 02/24/2024] Open
Abstract
The aim of optimal dentistry is to stabilise the stomatognathic system (teeth, periodontium, muscles and temporomandibular joint). All of these must work in harmony, as together they provide optimal care from diagnosis through planning to treatment. However, many clinicians currently give little importance to the identification of premature contacts and/or interferences prior to any dental treatment, which should be taken into account to provide improved stability in mandibular closure, correct anterior and canine guidance in mandibular movements.This clinical case describes the treatment of a patient with a diagnosis of functional occlusal disorder due to premature contact, whose treatment consisted of an occlusal adjustment by selective wear, following the technique described by the author Klineberg, with the aim of preserving the dental structure as much as possible while maintaining control during the occlusal adjustment and returning the greatest number of symmetrical and pointed contacts.
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Affiliation(s)
- Leslie Nicole Garcia-Cahuana
- Carrera de Estomatología de la Universidad Científica del Sur. Lima, Perú. , Universidad Científica del Sur Carrera de Estomatología Universidad Científica del Sur Lima Peru
| | - Joselin Harley Martinez-Aparcana
- Carrera de Estomatología de la Universidad Científica del Sur. Lima, Perú. , Universidad Científica del Sur Carrera de Estomatología Universidad Científica del Sur Lima Peru
| | - David Juan Figueroa Pastrana
- División de Rehabilitación Oral de la Universidad Científica del Sur. Lima, Perú. , Universidad Científica del Sur División de Rehabilitación Oral de la Universidad Científica del Sur Lima Peru
| | - Katherine Joselyn Atoche-Socola
- División de Rehabilitación Oral de la Universidad Científica del Sur. Lima, Perú. , Universidad Científica del Sur División de Rehabilitación Oral de la Universidad Científica del Sur Lima Peru
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ACCURACY OF INTRAORAL SCANNERS VERSUS TRADITIONAL IMPRESSIONS: A RAPID UMBRELLA REVIEW. J Evid Based Dent Pract 2022; 22:101719. [DOI: 10.1016/j.jebdp.2022.101719] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 01/29/2022] [Accepted: 03/11/2022] [Indexed: 12/13/2022]
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Ragunanthanan L, Maheshwari U, Vijayalakshmi D. Comparison of settling of occlusion in modified and full coverage thermoplastic retainers using T-scan. APOS TRENDS IN ORTHODONTICS 2022. [DOI: 10.25259/apos_107_2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Objectives:
The main intent of the study was to evaluate and compare the occlusal bite forces after settling between conventional and modified thermoplastic retainer groups using T-Scan.
Material and Methods:
This study comprised a total of 20 patients, who approached the retention phase after completion of fixed orthodontic therapy. After debonding (T0), occlusal analysis using the T-Scan system was done at centric occlusion. Group I (control) – 10 patients received the conventional thermoplastic retainer and Group II (experimental) – 10 patients received the modified thermoplastic retainer. Patients were instructed to wear the retainer continuously for 6 months except while eating and brushing. T-scan analysis after 6 months (T6) was done to evaluate the changes in occlusal bite forces. The obtained data were evaluated using STATA/IC software version 16.1 at a predetermined probability value of 0.05 which was considered significant.
Results:
The result obtained from this study was suggestive of significant improvement in bite force levels at centric occlusion in the modified thermoplastic group compared with the conventional group. Comparing the right (P < 0.17) and left (P < 0.01) posterior region, there was significant increase on the left side. A significant increase at maximum centric occlusion (P < 0.01) was seen in the region of the first molars. The anterior region did not show any improvement (P < 0.62) after 6 months of retention.
Conclusion:
Partial coverage of thermoplastic retainer significantly improves the occlusal contacts and force levels. The maximum change was seen in the posterior region and the minimum change in the anterior region at centric occlusion.
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Affiliation(s)
| | - Uma Maheshwari
- Department of Orthodontics, Meenakshi Ammal Dental College, Chennai, Tamil Nadu, India,
| | - Devaki Vijayalakshmi
- Department of Orthodontics, Meenakshi Ammal Dental College, Chennai, Tamil Nadu, India,
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Occlusal change in posterior implant-supported single crowns and its association with peri-implant bone level: a 5-year prospective study. Clin Oral Investig 2022; 26:4217-4227. [PMID: 35129663 DOI: 10.1007/s00784-022-04394-0] [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: 12/13/2021] [Accepted: 01/17/2022] [Indexed: 11/03/2022]
Abstract
OBJECTIVES This study aims to analyze the 5-year occlusal change in posterior implant-supported single crowns and the association between the relative occlusal force (ROF) and peri-implant bone level. MATERIALS AND METHODS Partially edentulous patients who had received implant-supported single crowns in the posterior region were included. Occlusal examinations with a computerized occlusion analysis system were conducted at 0.5, 3, 6, 12, 24, 36, 48, and 60 months after delivery of the implant-supported single crown. The ROFs of implant-supported single crowns, mesial adjacent teeth, and control natural teeth were recorded. Intraoral periapical radiographs were taken at each follow-up time to evaluate marginal bone level (MBL). Ordinary least square regression was used to analyze the association between ROF and MBL. RESULTS Thirty-seven posterior implant-supported single crowns in 33 participants (23.9 to 70.0 years) were followed up for 0.5 to 60 months [(42.4 ± 26.0) months]. The ROF of implant-supported single crowns increased from 2 weeks to 3 months (P < 0.01) and increased continuously between all two sequential time points from 6 to 36 months, with significant differences (P < 0.05). Then ROFs of implant-supported single crowns were significantly higher than those of control teeth at 48 and 60 months (P < 0.05). Regression analysis showed that ROF was significantly associated with MBL with a coefficient of 0.008 (P < 0.05). CONCLUSION The ROFs of posterior implant-supported single crown have significant change during 5 years' follow-up. The association between ROF and MBL has limited clinical significance. TRIAL REGISTRATION Chinese Clinical Trial Registry: ChiCTR-ROC-17012240. CLINICAL RELEVANCE The occlusion of implant-supported single crowns should be carefully monitored during follow-up examinations, and occlusal adjustment should be considered to prevent overloading.
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Measuring Changes in Jaw Opening Forces to Assess the Degree of Improvement in Patients with Temporomandibular Disorders. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Background: Currently, the degree of improvement in patients with TMDs is measured through subjective questionnaires and clinical examination This study aimed to investigate the properties of an objective quantitative measure of jaw-opening forces to assess clinical improvement in temporomandibular disorder (TMD) patients following treatment. Methods: Baseline jaw-opening forces were recorded for TMD-patients (n = 62) and a comparison group of TMD-free participants (n = 56), using a jaw-opening forces measuring device. TMD patients were divided into three subcategories (myofascial pain, disc-displacement, and myofascial pain and disc-displacement combined) and received a combination of treatment for six months; meanwhile, TMD-free participants did not receive treatment. Jaw-opening forces for each participant in both groups were measured at their six-month review appointment. Results: Jaw-opening forces were reliable at baseline (single measure ICC 0.98, 95% CI 0.97–0.98, ICC ≥ 0.94 for all groups and subcategories). Jaw-opening forces increased in the TMD group following treatment at six-months (18.6 N at baseline and 32.4 N at six-months, p < 0.001) and did not change significantly in the TMD-free group (49 N at baseline and 48.3 N at six-months). There was a small improvement in the disc displacement group (27.8% higher forces, p = 0.002). However, the myofascial-pain and myofascial-pain-and-disc-displacement groups showed significant improvement following treatment (93.5% higher forces, p < 0.001; 91.1% higher forces, p < 0.001; respectively). Conclusion: This study demonstrated that the measurement of jaw-opening forces could potentially be used to assess the clinical improvement in TMD patients following diagnosis and treatment.
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Montaruli G, Virgilio S, Laurenziello M, Tepedino M, Ciavarella D. Maxillary Transverse Deficit: A Retrospective Study of Two Biologically Oriented Devices through a Digital Workflow. Bioengineering (Basel) 2022; 9:bioengineering9010031. [PMID: 35049740 PMCID: PMC8773167 DOI: 10.3390/bioengineering9010031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/21/2021] [Accepted: 01/10/2022] [Indexed: 11/16/2022] Open
Abstract
The aim of this retrospective study was to compare the efficiency of two biologically oriented devices in achieving maxillary expansion: Rapid Palatal Expander (RPE) and Nitanium Palatal Expander-2 (NPE-2). Thirty-six subjects, divided in two equal groups, were included in this study. Maxillary dental arches were scanned using Trios 3 shape®, in order to perform a digital analysis of 3D models. The models were analyzed using Autodesk Fusion 360® and Meshmixer®. All data obtained from analysis of pre-treatment and post-treatment models were processed using Prism® software. The anterior arch width, the posterior arch width, the palate height, and palatal surface were measured to evaluate differences between the devices. A D'Agostino-Pearson normality test was done to check the data. A non-parametric t-test was used to compare the anterior and posterior arch width between the two groups, while a parametric t-test was used to compare the palatal height measurements between the two groups. The p-value was calculated. The limit value fixed was 0.05. Palatal width and surface showed a significant increase in both groups, but no significant changes in palatal height were found. The data processed showed that there were no significant differences between the devices (ΔREP-ΔNPE) in variation of anterior arch width, there were no significant differences in variation of posterior arch width and there were no significant differences in variation of palatal height. The comparison between the two groups showed that both methods were equally effective in correcting transverse defect.
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Affiliation(s)
- Graziano Montaruli
- Department of Clinical and Experimental Dentistry, School of Dentistry, University of Foggia, 71121 Foggia, Italy; (S.V.); (M.L.); (D.C.)
- Correspondence:
| | - Simona Virgilio
- Department of Clinical and Experimental Dentistry, School of Dentistry, University of Foggia, 71121 Foggia, Italy; (S.V.); (M.L.); (D.C.)
| | - Michele Laurenziello
- Department of Clinical and Experimental Dentistry, School of Dentistry, University of Foggia, 71121 Foggia, Italy; (S.V.); (M.L.); (D.C.)
| | - Michele Tepedino
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, 67100 L’Aquila, Italy;
| | - Domenico Ciavarella
- Department of Clinical and Experimental Dentistry, School of Dentistry, University of Foggia, 71121 Foggia, Italy; (S.V.); (M.L.); (D.C.)
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Occlusal Indicators Used in Dental Practice: A Survey Study. BIOMED RESEARCH INTERNATIONAL 2021; 2021:2177385. [PMID: 34778449 PMCID: PMC8580666 DOI: 10.1155/2021/2177385] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 10/12/2021] [Accepted: 10/15/2021] [Indexed: 12/12/2022]
Abstract
Introduction The function of the masticatory apparatus is complete when the dentition is intact with contact between the individual teeth and proper occlusion with the antagonists. For years, occlusal contacts have been studied to determine their exact location and describing various materials and methods for their registration such as paper foil, silk, and Shimstock foil. For years, occlusal contacts have been studied to determine their exact location and describe various materials and methods for their registration such as paper foil, silk, shim stock foil, the T-Scan system, and more recently the OccluSense system. The primary aim of the study was at evaluating which of the occlusal indicators is the most commonly used in practice, and the secondary aim was whether dentists are willing to use digital methods to examine occlusion. Materials and Methods The main primary information of the survey was collected by sending electronically anonymous questionnaires to 2014 dentists, randomly selected from all regions of the country. 228 questionnaires were filled in and returned. To achieve the goal of the study, the self-developed questionnaire was created and tested to survey the opinion about the use of occlusal indicators in dental practice. Each questionnaire contains questions about the sociodemographic and professional status of the people in the group and their opinion about the positives and negatives and the effectiveness of occlusal indicators. Results The obtained results confirm the statement that the most frequently used occlusal indicator in dental practice is the articulation paper. Articulation foil and silk are used less frequently than articulation paper. Of the listed quality indicators, Shimstock foil is rarely used in practice. Of the indicated quantitative indicators, the T-Scan system is more used than the OccluSense system. In the era of rapid technology development, the opinion and desire of dentists to increasingly want to introduce in their clinical practice quantitative methods are the digital diagnosis of occlusion. Conclusion In any dental practice, if technically possible, digital methods would be used, giving more accurate and reliable data on the registered occlusal contacts.
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Comparative Study Qualitative and Quantitative Techniques in the Study of Occlusion. BIOMED RESEARCH INTERNATIONAL 2021; 2021:1163874. [PMID: 34604379 PMCID: PMC8486563 DOI: 10.1155/2021/1163874] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/16/2021] [Accepted: 09/02/2021] [Indexed: 11/27/2022]
Abstract
Introduction The wide variety of methods for recording occlusal contacts and the contradictory data on the interpretation of the obtained markings provoked us to make a comparative laboratory study between different occlusal indicators. Purpose Evaluation of a qualitative and quantitative method for registration of occlusal contacts in static occlusion in laboratory conditions. Materials and Methods In completion of the objective, we designed an apparatus for registration of the occlusal contacts (AROC) in static occlusion which is used, corresponding to the MIP in clinical conditions. The occlusal indicators that were included in the study were articulating paper 100 μ, articulating foil 12 μ, and T-Scan Novus system with a sensor thickness of 100 μ. The collected primary statistical information was entered and processed with the statistical package SPSS Statistics 19.0, and the graphs were prepared using Microsoft Office 2019. We performed descriptive statistical analysis in this study. Comparisons were performed using one-way analysis of variance (ANOVA), Student's t-test, and Pearson coefficient method. For a significance level, p < 0.05 was chosen. Result and Discussion. With quality occlusal indicators, it is possible only to visually determine the size, number, and intensity of the marked contacts. After the statistical processing of the obtained data on the number of registered contacts, a significant difference is found in the number of contacts of certain teeth (18, 24, 25, 28, 38, 35, 34, 33, 44, 45, and 48) registered with articulating paper and articulating foil. The maximum force that is reported during the study with the T-Scan system is 93.72% and the forces in the right half of the dentition are 51.7% and in the left 48.9%. To visualize the location of the registered occlusal contacts with the system, it is intraoral to use a quality indicator and we recommend the use of articulating foil. Conclusion Based on findings from the current in vitro simulation, we can conclude that the type of occlusal indicator influences the registration of contacts, and therefore, we propose as a method of choice to achieve a balanced occlusion in clinical practice to combine the use of one conventional and one quantitative method.
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Zhou T, Wongpairojpanich J, Sareethammanuwat M, Lilakhunakon C, Buranawat B. Digital occlusal analysis of pre and post single posterior implant restoration delivery: A pilot study. PLoS One 2021; 16:e0252191. [PMID: 34214089 PMCID: PMC8253389 DOI: 10.1371/journal.pone.0252191] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 04/09/2021] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES The purposes of this study were to analyze the effects of single posterior implant restorations delivery on the redistribution of bite force and to evaluate the changes in occlusal force distribution of prostheses and potential influencing factors on occlusion variation at different stages. MATERIALS AND METHODS Thirty-two single posterior restorations in 30 participants (18 women and 12 men aged 27 to 75 years) were placed into either a unilateral single-tooth defect (n = 17) or on either side of a bilateral teeth defects (n = 15). The bite force (%) of the prostheses, teeth and segments at the maximum intercuspation position (MIP) was evaluated using a T-scan at 5 stages (pre-placement, immediately following placement, and 2 weeks, 3 months, and 6 months post-placement). RESULTS The occlusal force of implant-supported prostheses was significantly (P = .000) lower than those of the control natural teeth at the baseline, then no significant difference was found with that of the mesial teeth at 3 months, and finally it was significantly (P = .000) lower than that of the distal teeth at 6 months; meanwhile, it significantly (P = .008) increased by a mean of 2.04 times from 2 weeks (3.39 ± 2.61%) to 3 months (6.90 ± 4.77%), whereas no significant difference (P = .900) was found from 3 months (6.90 ± 4.77%) to 6 months (7.31 ± 4.60%). In addition, the bite force of the posterior segment on the restored side of both unilateral and bilateral gaps was significantly (P = .013,.001) improved by 3.31% and 6.83%, respectively, although the discrepancy in bite force significantly (P = .039) increased from an initial 3.52% to 5.02% for subjects with bilateral defects, accompanying increases in the proportion (15.38%) of the level III bilateral bite force deviation (P >.05). CONCLUSIONS Bite force and masticatory ability can be improved with the immediate delivery of a single posterior implant restoration. The bite force distributed on the implant prosthesis inevitably increases after placement of implant prostheses, a routine follow-up and occlusal evaluation are strongly needed.
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Affiliation(s)
- Ting Zhou
- Department of Periodontics & Implant Dentistry, Faculty of Dentistry, Thammasat University, Phatum Thani, Thailand
- Department of Orthodontics, School of Stomatology, Kunming Medical University, Yunnan, China
| | - Jirapa Wongpairojpanich
- Department of Periodontics & Implant Dentistry, Faculty of Dentistry, Thammasat University, Phatum Thani, Thailand
| | - Maytha Sareethammanuwat
- Department of Periodontics & Implant Dentistry, Faculty of Dentistry, Thammasat University, Phatum Thani, Thailand
| | - Charukrit Lilakhunakon
- Department of Periodontics & Implant Dentistry, Faculty of Dentistry, Thammasat University, Phatum Thani, Thailand
| | - Borvornwut Buranawat
- Department of Periodontics & Implant Dentistry, Faculty of Dentistry, Thammasat University, Phatum Thani, Thailand
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Digital Quantification of Occlusal Contacts: A Methodological Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18105297. [PMID: 34065755 PMCID: PMC8156897 DOI: 10.3390/ijerph18105297] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/06/2021] [Accepted: 05/08/2021] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To compare the reliability of digital occlusal contacts quantification and the validity of digital occlusal contacts quantification with traditional methods used for occlusal contact determination. SUBJECTS AND METHODS Thirty participants, all of whom were students at the Sahlgrenska Academy, University of Gothenburg in Gothenburg, Sweden, were included in the study. Three different methods were used to evaluate occlusal contacts: (I) a digital examination of the patients' casts, using the Ortho 3D Models (O3DM) software and measuring the total occlusal contact area in square millimeters (DE); (II) an examination involving the measurement of the total number of occlusal contacts on stone casts mounted in an articulator (AE); and (III) a clinical examination with the measurement of the total number of occlusal contacts with 8 μm-thick articulating foil (CE). RESULTS The repeated digital measurements (same casts scanned multiple times) showed a significant correlation of 0.85 (p < 0.01), which shows a diagnostic consistency. Furthermore, there was a significant correlation between the results obtained with the DE method and the AE of 0.41 (p < 0.05), and between those acquired with the AE method and the CE of 0.37 (p < 0.05). However, no significant correlation was found between the DE method and the CE method with a correlation coefficient of 0.10 (p > 0.05). CONCLUSIONS Digital casts can be used for quantification of the total occlusal contact area (in mm2) owing to the high reliability of repeated measurements and the strong validity of the method compared to traditionally employed stone cast measurements.
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Aesthetic Parameters and Patient-Perspective Assessment Tools for Maxillary Anterior Single Implants. Int J Dent 2021; 2021:6684028. [PMID: 33708255 PMCID: PMC7932805 DOI: 10.1155/2021/6684028] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/04/2020] [Accepted: 12/17/2020] [Indexed: 12/17/2022] Open
Abstract
Background This review aimed to concisely describe the current aesthetic objective indices for a single-implant maxillary anterior crown. The secondary aim was to propose introducing a unified, standardized questionnaire for adequately collecting patient-reported outcome measures (PROMs) in implant dentistry. Materials and Methods A literature review was conducted using both EMBASE/Ovid and MEDLINE/PubMed databases by combining keywords and Emtree/Mesh terms related to “Esthetics,” “Self-Assessment or Surveys and Questionnaires,” and “Single-Tooth Dental Implants.” Results The most meaningful aesthetic objective indices for single implants in the literature are the Pink Esthetic Score (PES), the Papilla Presence Index (PPI), Peri‐Implant and Crown Index (PICI), PES/White Esthetic Score (PES/WES), the Implant Crown Aesthetic Index (ICAI), and a modified version of the ICAI (mod-ICAI) index. Clearly, PES/WES is still the most widely accepted tool. It is encouraging to observe that there is an increasing tendency in recent years to report PROMs more frequently in the implant dentistry literature. We proposed the implementation of a unified, standardized questionnaire using a self-administered visual analogue scale (VAS) scoring system, which evaluates overall satisfaction, comfort, tooth appearance, gingival appearance, function, and hygiene complexity. This tool should be validated in the oral implantology research context for its regular implementation or further development. Conclusions Conducting qualitative studies among dental implant patients who received few implants or single-tooth implant reconstructions in the aesthetic zone may help dental researchers understand better how to efficiently develop and validate a quantitative instrument. This standard tool would reduce heterogeneity bias by providing comparable data between studies.
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Idris RI, Shoji Y, Lim TW. Occlusal force and occlusal contact reestablishment with resin-bonded fixed partial dental prostheses using the Dahl concept: A clinical study. J Prosthet Dent 2021; 127:737-743. [PMID: 33455729 DOI: 10.1016/j.prosdent.2020.11.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/20/2020] [Accepted: 11/20/2020] [Indexed: 11/30/2022]
Abstract
STATEMENT OF PROBLEM Space creation for a metal retainer of the resin-bonded fixed partial dental prostheses (RBFPDPs) with the Dahl concept remains controversial because of the lack of clinical studies. PURPOSE The purpose of this clinical study was to investigate the occlusal force and occlusal contact reestablishment of RBFPDPs cemented at an increased occlusal vertical dimension (the Dahl concept) and to evaluate the factors affecting them. MATERIAL AND METHODS A prospective clinical study was carried out on 28 participants receiving cantilevered RBFPDPs at an increased occlusal vertical dimension at the Faculty of Dentistry, University Teknologi MARA. Maximum occlusal forces were recorded at precementation, postcementation, and 12-week review visit by using pressure indicating film, while occlusal contact reestablishment was assessed at the precementation stage and 12-week review visit by using shim stock foils. The Wilcoxon signed-rank and chi-squared tests were used for statistical analysis (α=.05). RESULTS Significant differences were found for maximum occlusal force between the precementation and the postcementation and between the postcementation and the 12-week review of RBFPDPs (P<.05 for both) in all 28 participants. However, no significant difference was found between the precementation and the 12-week review (P=.085). The occlusal force reestablishment concerning sex, age, location, and arch of the prosthesis was found to be similar. Most of the participants (89.3%) achieved complete occlusal contact reestablishment and 10.7% partial occlusal reestablishment. The demographic and prosthesis factors were not significantly related to the occlusal reestablishment (P>.05). CONCLUSIONS Overall, occlusal force was reestablished after 12 weeks, and occlusal contact was completely reestablished in most participants after placement of RBFPDPs at an increased occlusal vertical dimension.
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Affiliation(s)
- Rostam Iffendi Idris
- Prosthodontic Resident, Faculty of Dentistry, Centre of Restorative Dentistry Studies, Jalan Hospital, University Teknologi MARA, Sungai Buloh Campus, Sungai Buloh, Selangor, Malaysia
| | - Yoshinobu Shoji
- Associate Professor, Faculty of Dentistry, Center of Oral & Maxillofacial Diagnostic and Medicine, Jalan Hospital, University Teknologi MARA, Sungai Buloh Campus, Sungai Buloh, Selangor, Malaysia
| | - Tong Wah Lim
- Associate Professor, Faculty of Dentistry, Centre of Restorative Dentistry Studies, Jalan Hospital, University Teknologi MARA, Sungai Buloh Campus, Sungai Buloh, Selangor, Malaysia.
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Kim KY, Choi JY, Oh SH, Moon HW, Kim SH, Ahn HW, Kim KA, Nelson G. Computerized Assessment of Occlusion and Muscle Activity during Use of a Multilayer Clear Retainer: A Preliminary Study. SENSORS (BASEL, SWITZERLAND) 2021; 21:E541. [PMID: 33451097 PMCID: PMC7828563 DOI: 10.3390/s21020541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/12/2021] [Accepted: 01/12/2021] [Indexed: 11/17/2022]
Abstract
The aim of this preliminary study was to evaluate the short-term changes of occlusal contacts and muscle activity after orthodontic treatment during the use of a multi-layer clear retainer. Evaluation was done with the T-scan and BioEMG systems. A total of 18 subjects were included, who were evaluated at three time intervals-T0 at debonding, T1 at one month after retainer delivery, and T2 at four months after retainer delivery. The T-scan and electromyography (EMG) data were recorded simultaneously. The T-scan system recorded the occlusion time, disclusion time and force distribution. The EMG waves were quantified by calculating the asymmetry index and activity index. The time variables changed but not significantly. Occlusal force decreased in the anterior dentition and increased in the posterior dentition during T0-T2. There was no clear evidence of a relationship between unbalanced occlusal forces and muscle activity. In most subjects, the temporalis anterior muscle was more dominant than the masseter muscle. From this preliminary computerized study, there were no significant changes in the state of the occlusion or muscle activity during the short-term retention period.
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Affiliation(s)
- Kyoung Yeon Kim
- Department of Orthodontics, Graduate School, Kyung Hee University, Seoul 02447, Korea; (K.Y.K.); (J.-Y.C.); (H.-W.M.); (H.-W.A.); (K.A.K.)
| | - Jin-Young Choi
- Department of Orthodontics, Graduate School, Kyung Hee University, Seoul 02447, Korea; (K.Y.K.); (J.-Y.C.); (H.-W.M.); (H.-W.A.); (K.A.K.)
| | - Song Hee Oh
- Department of Oral and Maxillofacial Radiology, Graduate School, Kyung Hee University, Seoul 02447, Korea;
| | - Hyung-Wook Moon
- Department of Orthodontics, Graduate School, Kyung Hee University, Seoul 02447, Korea; (K.Y.K.); (J.-Y.C.); (H.-W.M.); (H.-W.A.); (K.A.K.)
| | - Seong-Hun Kim
- Department of Orthodontics, Graduate School, Kyung Hee University, Seoul 02447, Korea; (K.Y.K.); (J.-Y.C.); (H.-W.M.); (H.-W.A.); (K.A.K.)
| | - Hyo-Won Ahn
- Department of Orthodontics, Graduate School, Kyung Hee University, Seoul 02447, Korea; (K.Y.K.); (J.-Y.C.); (H.-W.M.); (H.-W.A.); (K.A.K.)
| | - Kyung A Kim
- Department of Orthodontics, Graduate School, Kyung Hee University, Seoul 02447, Korea; (K.Y.K.); (J.-Y.C.); (H.-W.M.); (H.-W.A.); (K.A.K.)
| | - Gerald Nelson
- Division of Orthodontics, Department of Orofacial Science, University of California San Francisco, San Francisco, CA 94143, USA;
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Karakis D, Demirdag ED. Adjustment of Occlusal Splint with Synchronized T-Scan III Digital Occlusal Analysis System and Bio-EMG III in a Patient with Sleep Bruxism. JOURNAL OF ADVANCED ORAL RESEARCH 2020. [DOI: 10.1177/2320206820977696] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The occlusal splint has been frequently used as an effective treatment in sleep bruxism patients. In the adjustment procedure of occlusal splint with an optimal occlusion, clinicians usually use conventional methods; however, they cannot measure the surface area of contacts, amount of force, and contacting time sequence. Recently, two separate technologies have been synchronized together: T-Scan III and BioEMG III. In the present case report, an occlusal splint in a patient with sleep bruxism was adjusted with synchronized T-Scan computerized digital occlusal analysis system and BioEMG III. Optimal occlusal parameters were generated, and quantitative analyses of occlusal scheme and muscle activity level were performed before and after the adjustment of the occlusal splint. In the present case report, occlusion of the occlusal splint in a bruxism patient was adjusted with T-Scan III to fulfill the requirement of the optimal occlusion criteria. Before adjustment of occlusal splint, digital evaluation revealed unbalanced force distribution, lengthy occlusion (1.51 s), and disocclusion time (0.09 s) in centric relation. EMG activity of muscles was lower than expected values in centric relation. After adjustment of occlusal splint, canine protected occlusion with appropriate occlusion (0.2 s) and disocclusion (0.4 s) time were performed. Increased electromyography activity of the right anterior temporalis muscle showed a decrease in all excursive movements. Modern occlusal adjustment procedures provide a new standard of verification for the validation of occlusal splint fabrication with optimal occlusion.
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Affiliation(s)
- Duygu Karakis
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
| | - Elif Didem Demirdag
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
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Lee W, Kwon HB, Kim MJ, Lim YJ. Determination of the reliability and repeatability of a quantitative occlusal analyzer by using a piezoelectric film sensor: An in vitro study. J Prosthet Dent 2020; 127:331-337. [PMID: 33250197 DOI: 10.1016/j.prosdent.2020.07.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 07/01/2020] [Accepted: 07/01/2020] [Indexed: 10/22/2022]
Abstract
STATEMENT OF PROBLEM A digital quantitative occlusal analyzer with claimed lower cost and easier maneuverability has been introduced to replace conventional methods. However, information regarding its performance is scarce. PURPOSE The purpose of this in vitro study was to evaluate the reliability and repeatability of a newly introduced digital occlusal analysis device (Accura) and to compare it with an established occlusal analyzer (T-scan Novus). MATERIAL AND METHODS The sensor films of both devices were positioned between titanium maxillary and mandibular models that were equilibrated and arbitrarily mounted on a semiadjustable articulator. Compressive force was applied to the upper arm of the articulator with a universal testing machine, increased gradually to 50 N, and then released automatically. The time and force measurements from the universal testing machine and the tested devices were recorded by operating software programs. Five articulating film sensors of each device were tested 3 times each by 2 examiners and were repeated on consecutive days, totaling 60 trials per device. Reliability was defined as an agreement between the loaded force and measured force. Repeatability was defined as an agreement between repeated measurements of the Accura and T-scan Novus. Intraclass correlation coefficient was calculated for the statistical analysis (α=.05). RESULTS The calculated intraclass correlation coefficient of the Accura and the universal testing machine was 0.952. The intraclass correlation coefficient of the T-scan Novus and the universal testing machine was 0.963. Intraclass correlation coefficients that were calculated to compare the data acquired from different days were 0.938 for the Accura and 0.911 for the T-scan Novus. CONCLUSIONS The experimental results indicated that the reliability of both the Accura and T-scan Novus was excellent for measuring occlusal forces. In addition, both the Accura and T-scan Novus exhibited excellent repeatability.
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Affiliation(s)
- Wonsup Lee
- Graduate student, Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea; Clinical Assistant Professor, Department of Prosthodontics, Dental Hospital, St. Mary's Hospital of Catholic University of Korea, Seoul, Republic of Korea
| | - Ho-Beom Kwon
- Professor, Dental Research Institute and Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea.
| | - Myung-Joo Kim
- Professor, Dental Research Institute and Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Young-Jun Lim
- Professor, Dental Research Institute and Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Republic of Korea
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Turkistani KA, Alkayyal MA, Abbassy MA, Al-Dharrab AA, Zahran MH, Melis M, Zawawi KH. Comparison of occlusal bite force distribution in subjects with different occlusal characteristics. Cranio 2020; 41:204-211. [PMID: 33074797 DOI: 10.1080/08869634.2020.1830662] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVE To analyze bite force distribution in subjects with different occlusal characteristics. METHODS This prospective study included 132 candidates (50 males, 82 females) seeking orthodontic treatment, who were divided into four groups based on Angle's classification of malocclusion. T-Scan® III Version 7.0 was used to record their relative distribution of bite forces, which were compared using gender, Angle's occlusal classification, overjet, overbite, space analysis, sagittal, and transverse skeletal relations variables. RESULTS ANOVA revealed significant differences in posterior/anterior bite force ratios between sagittal dental and skeletal relationships, overjet, and overbite groups (p < 0.05). No significant difference was found between different space analysis and transverse relationship groups (p > 0.05) or between genders (p > 0.05). CONCLUSION Subjects with Class III, decreased overjet and decreased overbite displayed higher bite force in posterior teeth compared to other groups. This feature must be considered when evaluating patients with dental and periodontal pathologies that might be affected by excessive tooth stress, especially in subjects with oral parafunctions and bruxism.
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Affiliation(s)
- Khadijah A Turkistani
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | | | - Mona A Abbassy
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ayman A Al-Dharrab
- Department of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammed H Zahran
- Department of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Marcello Melis
- Private Practice, Cagliari, Italy.,Department of Orthodontics, School of Dentistry, University of Cagliari, Cagliari, Italy
| | - Khalid H Zawawi
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
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Alkayyal MA, Turkistani KA, Al-Dharrab AA, Abbassy MA, Melis M, Zawawi KH. Occlusion time, occlusal balance and lateral occlusal scheme in subjects with various dental and skeletal characteristics: A prospective clinical study. J Oral Rehabil 2020; 47:1503-1510. [PMID: 32966657 DOI: 10.1111/joor.13095] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 09/02/2020] [Accepted: 09/10/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To analyse occlusion time, occlusal balance and lateral occlusal scheme in subjects with various dental and skeletal characteristics. METHODS A total of 132 subjects (50 males and 82 females) seeking orthodontic treatment were included in this prospective study. Using the T-Scan III version 7.0 (Tekscan Inc, South Boston, MA, USA), the occlusion time, occlusal balance and lateral occlusal schemes were recorded and compared with gender, Angle's occlusal classification, overjet, overbite, space analysis, skeletal and transverse relations. ANOVA, t test and contingency tables analyses were performed. Statistical significance was set at P < .05. RESULTS Occlusion time was significantly shorter in subjects with balanced occlusion (0.18 seconds, P < .001), Class I normal occlusion (0.35 seconds, P = .028) and Class I skeletal profile (0.37 seconds, P = .002). Occlusion time was significantly longer in subjects with decreased overjet (0.60 seconds, P = .003). There were significant associations between the distribution of occlusal balance and Angles' classes of occlusion, skeletal relationship, overjet, overbite and space analysis (P < .05). Lateral occlusal schemes were only associated with Angle's classes of occlusion and skeletal relationship (P < .05). CONCLUSIONS Patients with Class I occlusion showed the least occlusion time, the most balanced occlusion and a higher frequency of canine guidance. Nonetheless, potentially balanced occlusion and group function were highly prevalent in all groups; therefore, ideal occlusion must be considered an ideal to inspire and aim for, but cannot be considered an essential requirement of every dental treatment.
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Affiliation(s)
| | - Khadijah A Turkistani
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ayman A Al-Dharrab
- Department of Oral & Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mona A Abbassy
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia and Alexandria University, Alexandria, Egypt
| | - Marcello Melis
- Private practice, Cagliari, Italy.,Department of Orthodontics, School of Dentistry, University of Cagliari, Cagliari, Italy
| | - Khalid H Zawawi
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
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Kostiuk TM, Kaniura AA, Shinchukovskiy IA, Tsyzh AV, Medvinska NI. EMG Activity of Chewing Muscles in Dysfunctional Disorders of Temporomandibular Joints. NEUROPHYSIOLOGY+ 2020. [DOI: 10.1007/s11062-020-09849-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Alkan Ö, Kaya Y, Keskin S. Computerized occlusal analysis of Essix and Hawley retainers used during the retention phase: a controlled clinical trial. J Orofac Orthop 2020; 81:371-381. [DOI: 10.1007/s00056-020-00236-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 04/25/2020] [Indexed: 11/28/2022]
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Kabbua P, Aunmeungtong W, Khongkhunthian P. Computerised occlusal analysis of mini-dental implant-retained mandibular overdentures: A 1-year prospective clinical study. J Oral Rehabil 2020; 47:757-765. [PMID: 32242956 DOI: 10.1111/joor.12969] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/18/2020] [Accepted: 03/22/2020] [Indexed: 11/30/2022]
Abstract
Occlusal analysis is a substantial tool for the functional improvement evaluation after using implant-retained overdenture comparing to complete denture without dental implant retaining. To evaluate occlusal pattern, chewing force distribution in mini-dental implant-retained mandibular overdentures by computerised occlusal analysis system and to compare patient satisfaction after 1-year function. Thirty-one patients wearing complete dentures were included in the study. Prior to mini-dental implant-retained treatment, all patients were assessed for occlusion and force distribution using computerised occlusal analysis system (T-Scan® ), and then, all patients received two mini-dental implant-retained mandibular overdentures. Mini-dental implants were immediately loaded using low vertical profile attachments (Equator® ). T-Scan® was used to evaluate chewing force and force distribution at 1 day, 3 months, 6 months and 12 months. The patient satisfactions before implant placement and after 1 year were evaluated using questionnaires which included satisfaction of denture quality, psychosocial behaviour and chewing efficiency modified from the validated questionnaires. Clinical evaluation of two mini-dental implant-retained mandibular overdentures showed 100% success rate after 1 year. T-Scan® demonstrated that maximum occlusal contact force increased continuously. The force distribution; the tooth contact number increased over the period. At 1-year follow-up, overall patient satisfaction was significantly greater than before receiving mini-dental implant treatment (P < .001). Using computerised occlusal analysis, mini-dental implants improve complete denture function significantly in terms of maximum occlusal contact force, tooth contact number without the impairment of force distribution. The oral function of the patients has been enhanced.
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Affiliation(s)
- Phongkamon Kabbua
- Center of Excellence for Dental Implantology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Weerapan Aunmeungtong
- Center of Excellence for Dental Implantology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Pathawee Khongkhunthian
- Center of Excellence for Dental Implantology, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
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Buduru S, Mesaros A, Talmaceanu D, Baru O, Ghiurca R, Cosgarea R. Occlusion in the digital era: a report on 3 cases. Med Pharm Rep 2020; 92:S78-S84. [PMID: 31989114 PMCID: PMC6978925 DOI: 10.15386/mpr-1524] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/06/2019] [Accepted: 11/04/2019] [Indexed: 11/23/2022] Open
Abstract
In the following case studies we wish to discuss the necessity of making use of digital technology in the occlusion-oriented dental practice. In the three presented cases, patients underwent complex orthodontic, implant and prosthetic treatment, the aim being to re-establish the functionality of the dento-maxillary apparatus. The patients were evaluated clinically at the completion of the treatment. Subsequently, during the follow-ups (which varied between 2 and 4 years), clinical analysis using articulating paper was carried out and possible signs of relapse were specifically searched for. Occlusal clinical analysis was later on compared with the occlusion recorded using the TRIOS® 3 intraoral scanner (3Shape) and the T-Scan™ Novus™ device (TekScan). Clinical and digitally obtained scanner results were similar. The results yielded by the T-Scan™ Novus™ device were different and they were also relevant for elucidating the cause of the symptomatology.
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Affiliation(s)
- Smaranda Buduru
- Department of Prosthodontics, Iuliu Hatieganu university of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Anca Mesaros
- Department of Propaedeutics and Dental Aesthetics, Iuliu Hatieganu university of Medicine and Pharmacy, Cluj-Napoca, Romania
| | | | - Oana Baru
- Stomestet Dental Clinic, Cluj-Napoca, Romania
| | | | - Raluca Cosgarea
- Department of Prosthodontics, Iuliu Hatieganu university of Medicine and Pharmacy, Cluj-Napoca, Romania
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Dias RAB, Rodrigues MJP, Messias AL, Guerra FADA, Manfredini D. Comparison between conventional and computerised methods in the assessment of an occlusal scheme. J Oral Rehabil 2019; 47:221-228. [PMID: 31705804 DOI: 10.1111/joor.12905] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 10/14/2019] [Accepted: 10/29/2019] [Indexed: 02/03/2023]
Abstract
PURPOSE In the definition of an occlusal scheme, clinicians should choose between conventional and computerised methods based on a careful appraise of the advantages and limitations. This study aims to assess the correlation between the two approaches in a clinical setting. METHODS Twenty-four patients were included to compare different methods of occlusal contacts assessment on the posterior surfaces of flat mandibular appliances. In supine position, they were asked to clench with maximum strength, in the maximum intercuspation position with a 24 μm articulating paper positioned between the teeth and the appliance surface. An extra-oral photograph of the marks was taken (total N = 2082). They were visually classified based on a pre-defined scale (ie, conventional assessment) and with ImageJ analysis software (ie, photographic software assessment). Additionally, a computerised occlusal analysis was performed (ie, computerised assessment). Correlation analysis of the data achieved with conventional, photographic and computerised assessments was performed. RESULTS Correlation between conventional and computerised assessments was weak (r = .265), whilst it was moderate between conventional and photographic assessments (r = .633), as well as between photographic and computerised assessments (r = .476). CONCLUSIONS This investigation showed a weak-to-moderate correlation between different methods (ie, conventional, photographic and computerised) to assess occlusal marks. None of the three can actually be considered the standard of reference, but based on their specific features, it can bet suggested that the conventional method may be enough for most clinical purposes, unless otherwise proven.
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Affiliation(s)
- Ricardo António Bernardo Dias
- Dentistry Department, Faculty of Medicine, Institute of Oral Implantology and Prosthodontics, University of Coimbra, Coimbra, Portugal
| | - Maria João Pascoal Rodrigues
- Dentistry Department, Faculty of Medicine, Institute of Occlusion and Orofacial Pain, University of Coimbra, Coimbra, Portugal
| | - Ana Lúcia Messias
- Dentistry Department, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Reddy S, Kumar PS, Grandhi VV. Relationship Between the Applied Occlusal Load and the Size of Markings Produced Due to Occlusal Contact Using Dental Articulating Paper and T-Scan: Comparative Study. JMIR BIOMEDICAL ENGINEERING 2018. [DOI: 10.2196/11347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Lee H, Cha J, Chun YS, Kim M. Comparison of the occlusal contact area of virtual models and actual models: a comparative in vitro study on Class I and Class II malocclusion models. BMC Oral Health 2018; 18:109. [PMID: 29921259 PMCID: PMC6009969 DOI: 10.1186/s12903-018-0566-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 05/30/2018] [Indexed: 05/29/2023] Open
Abstract
Backgrounds The occlusal registration of virtual models taken by intraoral scanners sometimes shows patterns which seem much different from the patients’ occlusion. Therefore, this study aims to evaluate the accuracy of virtual occlusion by comparing virtual occlusal contact area with actual occlusal contact area using a plaster model in vitro. Methods Plaster dental models, 24 sets of Class I models and 20 sets of Class II models, were divided into a Molar, Premolar, and Anterior group. The occlusal contact areas calculated by the Prescale method and the virtual occlusion by scanning method were compared, and the ratio of the molar and incisor area were compared in order to find any particular tendencies. Results There was no significant difference between the Prescale results and the scanner results in both the molar and premolar groups (p = 0.083 and 0.053, respectively). On the other hand, there was a significant difference between the Prescale and the scanner results in the anterior group with the scanner results presenting overestimation of the occlusal contact points (p < 0.05). In Molars group, the regression analysis shows that the two variables express linear correlation and has a linear equation with a slope of 0.917. R2 is 0.930. Groups of Premolars and Anteriors had a week linear relationship and greater dispersion. Conclusions Difference between the actual and virtual occlusion revealed in the anterior portion, where overestimation was observed in the virtual model obtained from the scanning method. Nevertheless, molar and premolar areas showed relatively accurate occlusal contact area in the virtual model.
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Affiliation(s)
- Hyemin Lee
- Graduate School of Clinical Dentistry, Ewha Womans University, Seoul, South Korea
| | - Jooly Cha
- Graduate School of Clinical Dentistry, Ewha Womans University, Seoul, South Korea
| | - Youn-Sic Chun
- Department of Orthodontics, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Minji Kim
- Department of Orthodontics, College of Medicine, Ewha Womans University, Seoul, South Korea.
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Afrashtehfar KI, Brägger U, Igarashi K, Belser UC. A modified technique for the intraoral assessment of static occlusal contacts. J Prosthet Dent 2018; 119:909-911. [DOI: 10.1016/j.prosdent.2017.10.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/03/2017] [Accepted: 10/03/2017] [Indexed: 11/28/2022]
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Ferrato G, Falisi G, Ierardo G, Polimeni A, Di Paolo C. Digital evaluation of occlusal forces: comparison between healthy subjects and TMD patients. ANNALI DI STOMATOLOGIA 2017; 8:79-88. [PMID: 29276576 DOI: 10.11138/ads/2017.8.2.089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Aim Continuous technological innovation has provided the clinicians to access to a computerized device that can analyse the different characteristics of occlusal contacts. The purpose of this research was to use this device to study the occlusal forces comparing healthy subjects and TMD patients. Materials and methods The study was conducted by following specific criteria to select participants; the sample was divided into two homogeneous groups: control group (CG) comprising healthy subjects, and dysfunctional group (DG) comprising TMD patients. The occlusal force analysis was performed using the computerized system T-Scan III V 5.20 T. The data were analysed with statistical methods. Results The most significant differences emerged between the groups in the average occlusal load distribution and in the location of the centre of occlusal forces (COF). In particular, compared with the CG and the functional standard, reductions in the molar field forces on the second and first molars of 27% and 6.9%, respectively, were observed in the DG. The COF was located in the most forward position in TMD patients compared with healthy subjects. Conclusions Although the differences in the distribution of the occlusal forces and the location of the occlusal centre of gravity were significant, the relationship between occlusal contacts and TMD remains to be fully clarified. Further research is needed to investigate whether studying occlusal force distributions in both healthy subjects and TMD patients.
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Affiliation(s)
- Giacomo Ferrato
- Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Italy
| | - Giovanni Falisi
- Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Italy
| | - Gaetano Ierardo
- Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Italy
| | - Antonella Polimeni
- Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Italy
| | - Carlo Di Paolo
- Department of Oral and Maxillofacial Sciences, "Sapienza" University of Rome, Italy
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Afrashtehfar KI, Eimar H, Yassine R, Abi-Nader S, Tamimi F. Evidence-based dentistry for planning restorative treatments: barriers and potential solutions. EUROPEAN JOURNAL OF DENTAL EDUCATION : OFFICIAL JOURNAL OF THE ASSOCIATION FOR DENTAL EDUCATION IN EUROPE 2017; 21:e7-e18. [PMID: 27146788 DOI: 10.1111/eje.12208] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/08/2016] [Indexed: 06/05/2023]
Abstract
INTRODUCTION Evidence-based dentistry (EBD) can help provide the best treatment option for every patient, however, its implementation in restorative dentistry is very limited. OBJECTIVE This study aimed at assessing the barriers preventing the implementation of EBD among dental undergraduate and graduate students in Montreal, and explore possible solutions to overcome these barriers. MATERIALS AND METHODS A cross-sectional survey was conducted by means of a paper format self-administrated questionnaire distributed among dental students. The survey assessed the barriers and potential solutions for implementation of an evidence-based practice. RESULTS Sixty-one students completed the questionnaire. Forty-one percent of respondents found evidence-based literature to be the most reliable source of information for restorative treatment planning, however, only 16% used it. They considered that finding reliable information was difficult and they sometimes encountered conflicting information when consulting different sources. Dental students had positive attitudes towards the need for better access to evidence-based literature to assist learning and decision making in restorative treatment planning and to improve treatment outcomes. Even for dentists trained in EBD, online searching takes too much time, and even though it can provide information of better quality than personal intuition, it might not be enough to identify the best available evidence. CONCLUSIONS Even though dental students are aware of the importance of EBD in restorative dentistry they rarely apply the concept, mainly due to time constraints. For this reason, implementation of EBD would probably require faster access to evidence-based knowledge.
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Affiliation(s)
- K I Afrashtehfar
- Division of Prosthodontics and Restorative Dentistry, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | - H Eimar
- Department of Orthodontics, School of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - R Yassine
- Undergraduate Dental Clinics, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | - S Abi-Nader
- Division of Prosthodontics and Restorative Dentistry, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
- Undergraduate Dental Clinics, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
| | - F Tamimi
- Division of Prosthodontics and Restorative Dentistry, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
- Undergraduate Dental Clinics, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada
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Madani AS, Nakhaei M, Alami M, Haghi HR, Moazzami SM. Post-insertion Posterior Single-implant Occlusion Changes at Different Intervals: A T-Scan Computerized Occlusal Analysis. J Contemp Dent Pract 2017; 18:927-932. [PMID: 28989132 DOI: 10.5005/jp-journals-10024-2151] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIM The aim of this prospective cohort study was to evaluate the postinsertion posterior single-implant occlusion changes at 3- and 6-month intervals using T-Scan computerized occlusal analysis. MATERIALS AND METHODS A total of 21 patients received single implant, opposed by natural dentition, in posterior regions of the maxilla or mandible (13 premolar, 8 molar) and were finally restored with cemented-retained metal-ceramic crowns. The occlusal contacts were equilibrated according to the implant-protective occlusion concept to develop light contact with heavy occlusion and no contact with light occlusion in maximum inter-cuspation. The percentage of force applied to the implant crowns (POFI) and contralateral teeth (POFT) was evaluated using T-Scan computerized occlusal analysis at prosthesis insertion, 3- and 6-month follow-up appointments. The data were statistically analyzed using Friedman test and Wilcoxon post hoc test (α = 0.05). RESULTS The POFI values at the 6- and 3-month follow-up appointments were significantly higher than those at prostheses insertion (p = 0.001 and p = 0.005 respectively). In addition, there were significant differences between the POFI at 3- and 6-month follow-up (p = 0.020). However, the POFT values at 3- and 6-month follow-up appointments were significantly lower than those at baseline (p < 0.001). CONCLUSION The intensity of occlusal contacts of implant-supported prostheses opposed by natural dentition gradually increased after prosthesis insertion. Placement of single posterior implant-supported restoration decreased the percentage of occlusal force applied to contralateral arch. CLINICAL SIGNIFICANCE A periodic occlusal adjustment of implant-supported prostheses is necessary to prevent potential overloading from the movement of opposing natural dentition.
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Affiliation(s)
- Azam S Madani
- Department of Prosthodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Islamic Republic of Iran
| | - Mohammadreza Nakhaei
- Department of Prosthodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Islamic Republic of Iran, Phone: +985138829501, e-mail: /
| | - Malihe Alami
- Department of Prosthodontics, Faculty of Dentistry, Golestan University of Medical Sciences, Gorgan, Islamic Republic of Iran
| | - Hamidreza Rajati Haghi
- Department of Prosthodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Islamic Republic of Iran
| | - Saied Mostafa Moazzami
- Department of Restorative Dentistry, Faculty of Dentistry Mashhad University of Medical Sciences, Mashhad, Islamic Republic of Iran
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Assessment of occlusion with the T-Scan system in patients undergoing orthognathic surgery. Sci Rep 2017; 7:5356. [PMID: 28706294 PMCID: PMC5509719 DOI: 10.1038/s41598-017-05788-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 06/05/2017] [Indexed: 11/13/2022] Open
Abstract
Dental occlusion varies among individuals, and achieving correct physiological occlusion after osteotomy is essential for the complex functioning of the stomatognathic system. The T-Scan system records the centre of force, first contact, maximum bite force, and maximum intercuspation. The aim of the present study was to investigate the usefulness and consistency of T-Scan in assessing occlusion before and after orthognathic surgery. Occlusal information was evaluated for 30 healthy adults with normal occlusion and 40 patients undergoing orthognathic surgery. T-Scan had a high degree of reliability for consecutive measurements (Pearson correlation, r = 0.98). For most parameters, occlusal distribution was better after surgery than before surgery. More teeth contributed to occlusion at maximum intercuspation after surgery than before surgery (14 vs. 10). In addition, the difference in the posterior force distribution was reduced after surgery (17.6 ± 13.8 vs. 22.7 ± 21.4 before surgery), indicating better occlusal force distribution after surgery. The maximum percentage force on teeth (p = 0.004) and the number of teeth contributing to occlusion (p < 0.001) also differed significantly. Thus, T-Scan is good for assessing occlusal discrepancies and can be used to portray the pre- and post-operative occlusal contact distribution during treatment planning and follow-up.
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Qadeer S, Abbas AA, Sarinnaphakorn L, Kerstein RB. Comparison of excursive occlusal force parameters in post-orthodontic and non-orthodontic subjects using T-Scan® III. Cranio 2016; 36:11-18. [DOI: 10.1080/08869634.2016.1259785] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Sarah Qadeer
- Faculty of Dentistry, Department of Prosthodontics and Occlusion, Thammasat University, Pathum Thani, Thailand
| | - Ahmed A. Abbas
- Faculty of Dentistry, Department of Prosthodontics and Occlusion, Thammasat University, Pathum Thani, Thailand
| | - Lertrit Sarinnaphakorn
- Faculty of Dentistry, Department of Prosthodontics and Occlusion, Thammasat University, Pathum Thani, Thailand
| | - Robert B. Kerstein
- Department of Restorative Dentistry, Tufts University School of Dental Medicine, Boston, MA, USA
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Afrashtehfar KI, Afrashtehfar CD. Lack of association between overload and peri-implant tissue loss in healthy conditions. Evid Based Dent 2016; 17:92-93. [PMID: 27767107 DOI: 10.1038/sj.ebd.6401193] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Data sourcesPubMed, Ovid, EMBASE and LILACS were searched up to December 2011. In addition, the reference lists of the selected review papers were further hand searched. Language was limited to studies published only in English.Study selectionHuman and animal randomised clinical trials (RCT), systematic reviews of RCTs, non-randomised trials, case series that reported on the clinical, radiographic, and/or histological outcomes of dental/oral implants exposed to excessive load were considered eligible for inclusion.Data extraction and synthesisIdentified studies were evaluated by one non-blinded reviewer according to the selection criteria. When doubt arose co-authors assisted until consensus was reached. The data extracted from the clinical studies included study design, patients/implants/prostheses/loading time/follow-up time, type of intervention/methods, outcome, and, specific to animal studies, the animal model, intention to overload (ie yes or no), load mode, type of loading (ie dynamic or static), and microbial control if any. The heterogeneity among studies did not allow data to be combined.ResultsThe search strategy in addition to hand searching retrieved 726 potentially eligible studies after de-duplication. After screening the 41 full-text relevant studies and applying the selection criteria assessment, only three non-randomised split-mouth animal studies and one systematic review of animal experimental data were considered for inclusion. The non-randomised studies could not reveal any relationship between increased leverage on dental implants and marginal loss. The systematic review suggested that supra-occlusal contacts on uninflamed peri-implant bone tissue did not cause catabolism, whereas supra-occlusal contacts combined with inflammation significantly increased the plaque-induced catabolism.ConclusionsThe effect of implant overload on bone/implant loss in clinically well-integrated implants is poorly reported and provides little unbiased evidence to support a cause-and-effect relationship.
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Uzuner FD, Odabasi H, Acar S, Tortop T, Darendeliler N. Evaluation of the effects of modified bonded rapid maxillary expansion on occlusal force distribution: A pilot study. Eur J Dent 2016; 10:103-108. [PMID: 27011748 PMCID: PMC4784139 DOI: 10.4103/1305-7456.175695] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Objective: To evaluate the effects of modified bonded rapid maxillary expansion (RME) on occlusal force distribution. Materials and Methods: The sample included 12 patients (7 girls and 5 boys; mean age: 13.1 years) at the permanent dentition stage with bilateral posterior cross-bite. The patients were treated with a modified bonded RME appliance, activated twice a day. The study was terminated when the palatal cusps of the maxillary posterior teeth were occluding with the buccal cusps of the mandibular posterior teeth. The postretention period was 3 months. The T-Scan III device was used to analyze the percentages of occlusal force distribution, and records were taken at the pretreatment (T1), the postreatment (T2), and the postretention (T3) periods. Wilcoxon signed rank test was used for statistical analyses. Results: Incisors were most frequently without contact, followed by canines. The highest forces were seen in the second and first molar regions. A significant decrease was seen in total occlusal force during treatment (T1–T2); however, during retention, the force returned to its initial value, and no significant differences were found (T1–T3). No differences were found between right and left sides and in occlusal forces of the teeth in all time periods. Conclusion: The use of modified bonded RME decreases the total occlusal forces during the treatment period, but it does returns to its initial value after the postretention period.
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Affiliation(s)
- Fatma Deniz Uzuner
- Department of Orthodontics, Gazi University Faculty of Dentistry, Ankara, Turkiye
| | - Hande Odabasi
- Department of Orthodontics, Gazi University Faculty of Dentistry, Ankara, Turkiye
| | - Secil Acar
- Department of Orthodontics, Gazi University Faculty of Dentistry, Ankara, Turkiye
| | - Tuba Tortop
- Department of Orthodontics, Gazi University Faculty of Dentistry, Ankara, Turkiye
| | - Nilufer Darendeliler
- Department of Orthodontics, Gazi University Faculty of Dentistry, Ankara, Turkiye
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Canullo L, Tallarico M, Radovanovic S, Delibasic B, Covani U, Rakic M. Distinguishing predictive profiles for patient-based risk assessment and diagnostics of plaque induced, surgically and prosthetically triggered peri-implantitis. Clin Oral Implants Res 2015; 27:1243-1250. [DOI: 10.1111/clr.12738] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2015] [Indexed: 11/28/2022]
Affiliation(s)
- Luigi Canullo
- Rome Italy
- Istituto Stomatologico Toscano; Camaiore Viareggio Italy
| | | | - Sandro Radovanovic
- Faculty of Organizational Sciences; University of Belgrade; Belgrade Serbia
| | - Boris Delibasic
- Faculty of Organizational Sciences; University of Belgrade; Belgrade Serbia
| | - Ugo Covani
- Istituto Stomatologico Toscano; Camaiore Viareggio Italy
| | - Mia Rakic
- Institute for Biological Research “Sinisa Stankovic”; University of Belgrade; Belgrade Serbia
- Faculty of Dental Surgery; Centre for Osteoarticular and Dental Tissue Engineering; INSERM U791; University of Nantes; Nantes France
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