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Hamdi A, Kallala R, Harzallah B. Chewing efficiency and contact area discrepancies in Angle's class I and II malocclusion: A comparative study. Saudi Dent J 2024; 36:633-637. [PMID: 38690385 PMCID: PMC11056408 DOI: 10.1016/j.sdentj.2023.12.016] [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: 10/05/2023] [Revised: 12/22/2023] [Accepted: 12/25/2023] [Indexed: 05/02/2024] Open
Abstract
Objective The study aimed to assess and compare both the chewing efficiency and the contact area between class I and class II of Angle's malocclusions. Material and methods A total of 120 individuals aged between 19 and 30 years were examined and were divided into two groups according to Angle's class (Class I and class II). The chewing efficiency was quantified using the ViewGum software and two-colored chewing gum. The contact area was quantified using modeling wax and MATLAB software. All data were collected, then, analyzed using SPSS software 21. Data normality was checked through kurtosis test. Descriptive results were calculated. Matched sample t-tests were used to compare chewing efficiency measurements between right and left sides. Independent t-tests were used to compare chewing efficiency and the contact area between class I and class II of Angle's malocclusions. Linear regression and Pearson correlation were used to assess the correlation between chewing efficiency and the contact area. The significance level was fixed at p = 0.05. Results For group 1, the mean hue value on both sides was 0.086 ± 0.058. For group 2, it was 0.095 ± 0.055. The difference between both groups was statistically significant (p = 0.03). For group 1, the mean contact area was 49.91 ± 21.47 mm2. For group 2, it was 51.42 ± 19.76 mm2. The difference was statistically not significant (p = 0.4). The correlation between the contact area and the chewing efficiency in both groups was statistically significant and it was negative (in class I p = 0 and R = -0.616; in class II p = 0.01 and R = -0.408). Conclusion The Chewing is better for patients with Angle's Class I malocclusion. The contact area is higher. Larger occlusal contact area leads to higher masticatory efficiency. Further studies should be conducted.
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Affiliation(s)
- Ahmed Hamdi
- Faculty of Dental Medicine Monastir Tunisia; University of Monastir
| | - Rim Kallala
- Faculty of Dental Medicine Monastir Tunisia, University of Monastir, Department of Fixed Prosthodontics, Laboratory of Dental Anatomy, Research Laboratory of Occlusodontics and Ceramic Prostheses LR16ES15, 5000 Monastir, Tunisia
| | - Belhassen Harzallah
- Faculty of dental Medicine Monastir Tunisia, University of Monastir, Department of fixed prosthodontics, Research laboratory of Occlusodontics and Ceramic Prostheses LR16ES15, 5000, Monastir, Tunisia
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Lim HK, Song IS, Park JE, Choi WC, Hwang J, Choi YJ, Kim DK, Lee UL. Relation Between Masticatory Performance and Skeletal Properties in Patients With Skeletal Class III Malocclusion. J Craniofac Surg 2024:00001665-990000000-01372. [PMID: 38393303 DOI: 10.1097/scs.0000000000010056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 01/10/2024] [Indexed: 02/25/2024] Open
Abstract
This study aimed to measure masticatory performance (MP) using β-carotene gummy jelly to investigate its relationship with skeletal properties in decompensated patients diagnosed with skeletal class III malocclusion. The study included 78 patients (38 men and 40 women) diagnosed with skeletal class III malocclusion without temporomandibular joint disorder and periodontal disease. MP was measured using a new masticatory measuring device and β-carotene in the gummy jelly. Lateral and posteroanterior cephalograms were obtained, and skeletal properties (Me deviation, ANB, SNB, APDI, Wits, ODI, facial axis, body length, ramus length, SN-GoGn, anterior facial height, posterior facial height, saddle angle, articular angle, and gonial angle) were evaluated. MP differences according to age and sex and the effect of skeletal properties on MP were analyzed using multiple linear regression analysis. The MP of all patients was 3690.55±1428.77 mm², MP of the male group was 4043.05±1498.09 mm², and MP of the female group was 3355.68±1272.19 mm². Among the items investigated, the variable that affected MP was posterior facial height. Posterior facial height showed a positive correlation (P=0.022). There was no significant difference between MP and other skeletal properties (P>0.05). The severity of the hypodivergency in skeletal class III could affect MP. The relationship between facial asymmetry or skeletal relation and MP could not be explained in this study.
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Affiliation(s)
- Ho-Kyung Lim
- Department of Oral and Maxillofacial Surgery, Korea University Guro Hospital, Seoul, Korea
| | - In-Seok Song
- Department of Oral and Maxillofacial Surgery, Korea University Anam Hospital, Seoul, Korea
| | - Jung-Eun Park
- Department of Orthodontics, Dental Center, Chung-Ang University Hospital, Seoul, Korea
| | - Won-Cheul Choi
- Department of Orthodontics, Dental Center, Chung-Ang University Hospital, Seoul, Korea
| | - Jiyoung Hwang
- Department of Oral and Maxillofacial Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Young-Jun Choi
- Department of Oral and Maxillofacial Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Don-Kyu Kim
- Department of Physical Medicine and Rehabilitation, Chung-Ang University College of Medicine, Seoul, Korea
| | - Ui-Lyong Lee
- Department of Oral and Maxillofacial Surgery, Chung-Ang University College of Medicine, Seoul, Korea
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Au Yeung KSR, Shan Z, Sum FHKMH, Wong KWF, Lee HMG, Yang Y. Association between occlusal features and masticatory function in Hong Kong preschool children: a survey with one-year longitudinal follow-up. BMC Oral Health 2024; 24:187. [PMID: 38317203 PMCID: PMC10845510 DOI: 10.1186/s12903-024-03895-6] [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: 09/12/2023] [Accepted: 01/15/2024] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND Mastication is important for breaking down food, aiding swallowing and nutrients absorption, and is therefore fundamental to a child's development. Studies have shown poor masticatory function to be associated with younger age and presence of caries. However, studies of the association between masticatory function and malocclusion yielded contradictory results. The aim of this study is therefore to investigate the association between three-dimensional occlusal features with masticatory function, among preschool children in Hong Kong. METHODS Self-administered questionnaires on masticatory function in three domains, namely general chewing difficulty, requiring help when eating different food types and increased preference for soft food were completed by parents. Information on non-nutritive sucking habits and basic demographics were also collected in the questionnaire. Clinical examinations were conducted to record three-dimensional occlusal features and presence of caries. Baseline investigations and one-year follow-ups were undertaken for 1,566 and 996 preschool children. Association of poor masticatory function with occlusal features, sucking habits and caries was investigated using chi-squared tests. Binomial logistic regressions were then carried out incorporating any significant factors identified. Longitudinal analysis of the one-year follow-up data was carried out to investigate whether improved occlusal features, sucking habits and caries resulted in better masticatory function. RESULTS In the cross-sectional study, the first domain of general chewing difficulty was associated with caries and thumb/digit sucking. The second domain of requiring help when eating different food types was associated with the male sex, younger age, caries and pacifier use. The last domain of increased preference for soft foods was associated with caries and thumb/digit sucking. Occlusal features, including abnormal overjet and unilateral permanent molars not in contact, were significantly associated with poor masticatory function in the bivariate analyses, but were not significant in the logistic regressions. In the longitudinal analysis, general chewing difficulty was found to improve in those of older age and those with resolved anterior crossbite. Less help was required to eat meat in those with fewer caries. Similarly, less help was required to eat food containing bones in those with reduced pacifier use. Preferences for eating soft foods was reduced in those who developed a normal overjet. CONCLUSIONS The study identified significant relationships between masticatory difficulties and factors associated with age, gender, active caries, and non-nutritive oral habits such as thumb/digit sucking and pacifier use. Younger children and males required more assistance with certain food types. Active caries and thumb/digit sucking habits contributed to general masticatory difficulties and preference for soft foods. The one-year follow-up indicated that improvement in masticatory function varies across age cohorts and were associated with improved occlusal features, such as resolution of anterior crossbite and normalized overjet, reduced pacifier use, and a decrease in the number of decayed teeth.
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Affiliation(s)
- King Sang Rita Au Yeung
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Hong Kong, Hong Kong, China
| | - Zhiyi Shan
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Hong Kong, Hong Kong, China
| | | | - Ka Wai Frank Wong
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Hong Kong, Hong Kong, China
| | - Hui Man Gillian Lee
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Hong Kong, Hong Kong, China
| | - Yanqi Yang
- Division of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, University of Hong Kong, Hong Kong, China.
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Hama Y, Hosoda A, Kubota C, Guo R, Soeda H, Yamaguchi K, Okada M, Minakuchi S. Factors related to masticatory performance in junior and senior high school students and young adults: A cross-sectional study. J Prosthodont Res 2023; 67:424-429. [PMID: 36351617 DOI: 10.2186/jpr.jpr_d_22_00137] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
PURPOSE Maintaining good masticatory function from a young age promotes lifelong health, yet limited studies have explored masticatory performance in young individuals. We investigated the relationship of sex, age, and individual oral functions with masticatory performance among junior and senior high school students and young adults. METHODS This cross-sectional study included students aged 12-13, 14-15, and 16-17 years (groups S1, S2, and S3, respectively) and young adults aged 20-40 years (group YA). We assessed oral functions, the number of functional teeth, and anthropometric measurements. Masticatory performance was evaluated using color-changeable chewing gum. We analyzed sex-related differences in each group and age-related differences in each sex. Multiple linear regression analysis was performed using masticatory performance as the dependent variable to investigate related factors. RESULTS Among the 522 children and 100 young adults, males exhibited significantly higher masticatory performance than females in groups S1, S3, and YA. Among males, groups S2, S3, and YA exhibited significantly higher masticatory performance than group S1. Among females, group S2 exhibited higher masticatory performance than groups S1 and S3. Male sex, the maximum occlusal force and tongue pressure, and the number of functional teeth were significantly correlated with masticatory performance. CONCLUSIONS Masticatory function development differed by sex, with males exhibiting higher masticatory performance than females. We identified that male sex, the maximum occlusal force and tongue pressure, and the number of functional teeth were significantly associated with masticatory performance. Our findings provide a basis for masticatory performance assessment in different age groups.
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Affiliation(s)
- Yohei Hama
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akemi Hosoda
- Division of Medical Nutrition, Faculty of Healthcare, Tokyo Healthcare University, Tokyo, Japan
| | - Chieko Kubota
- Major of Oral Health Sciences, Department of Health Sciences, Saitama Prefectural University, Japan
| | - Ruoyan Guo
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hitomi Soeda
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Kohei Yamaguchi
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mitsuzumi Okada
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shunsuke Minakuchi
- Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Hardin AM, Knigge RP, Duren DL, Williams-Blangero S, Subedi J, Mahaney MC, Sherwood RJ. Genetic influences on dentognathic morphology in the Jirel population of Nepal. Anat Rec (Hoboken) 2022; 305:2137-2157. [PMID: 34981668 PMCID: PMC9250551 DOI: 10.1002/ar.24857] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 12/12/2022]
Abstract
Patterns of genetic variation and covariation impact the evolution of the craniofacial complex and contribute to clinically significant malocclusions in modern human populations. Previous quantitative genetic studies have estimated the heritabilities and genetic correlations of skeletal and dental traits in humans and nonhuman primates, but none have estimated these quantitative genetic parameters across the dentognathic complex. A large and powerful pedigree from the Jirel population of Nepal was leveraged to estimate heritabilities and genetic correlations in 62 maxillary and mandibular arch dimensions, incisor and canine lengths, and post-canine tooth crown areas (N ≥ 739). Quantitative genetic parameter estimation was performed using maximum likelihood-based variance decomposition. Residual heritability estimates were significant for all traits, ranging from 0.269 to 0.898. Genetic correlations were positive for all trait pairs. Principal components analyses of the phenotypic and genetic correlation matrices indicate an overall size effect across all measurements on the first principal component. Additional principal components demonstrate positive relationships between post-canine tooth crown areas and arch lengths and negative relationships between post-canine tooth crown areas and arch widths, and between arch lengths and arch widths. Based on these findings, morphological variation in the human dentognathic complex may be constrained by genetic relationships between dental dimensions and arch lengths, with weaker genetic correlations between these traits and arch widths allowing for variation in arch shape. The patterns identified are expected to have impacted the evolution of the dentognathic complex and its genetic architecture as well as the prevalence of dental crowding in modern human populations.
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Affiliation(s)
- Anna M. Hardin
- Biology Department, Western Oregon University
- Craniofacial Research Center, Department of Pathology and Anatomical Sciences, University of Missouri School of Medicine
- Department of Orthopaedic Surgery, University of Missouri School of Medicine
| | - Ryan P. Knigge
- Craniofacial Research Center, Department of Pathology and Anatomical Sciences, University of Missouri School of Medicine
- Department of Orthopaedic Surgery, University of Missouri School of Medicine
- Department of Integrative Biology and Physiology, University of Minnesota Medical School
| | - Dana L. Duren
- Craniofacial Research Center, Department of Pathology and Anatomical Sciences, University of Missouri School of Medicine
- Department of Orthopaedic Surgery, University of Missouri School of Medicine
| | - Sarah Williams-Blangero
- South Texas Diabetes and Obesity Institute, School of Medicine, University of Texas Rio Grande Valley
| | | | - Michael C. Mahaney
- South Texas Diabetes and Obesity Institute, School of Medicine, University of Texas Rio Grande Valley
- Department of Human Genetics, School of Medicine, University of Texas Rio Grande Valley
| | - Richard J. Sherwood
- Craniofacial Research Center, Department of Pathology and Anatomical Sciences, University of Missouri School of Medicine
- Department of Orthopaedic Surgery, University of Missouri School of Medicine
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Kaur H, Singh N, Gupta H, Chakarvarty A, Sadana P, Gupta N, Kochhar A, Bhasin R. Effect of various malocclusion on maximal bite force- a systematic review. J Oral Biol Craniofac Res 2022; 12:687-693. [PMID: 36092457 PMCID: PMC9449769 DOI: 10.1016/j.jobcr.2022.08.009] [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: 03/25/2022] [Revised: 05/13/2022] [Accepted: 08/10/2022] [Indexed: 11/18/2022] Open
Abstract
Objective This systematic review evaluates the variation in molar bite force (MBF) with the type and severity of dental malocclusion in young adults with permanent dentition. Methods We searched seven electronic databases until December 31, 2021, and identified 1898 articles, of which 22 full-texts were reviewed. Eight clinical studies with subjects having permanent dentition with various dental malocclusions and quantifying maximal bite force were included for the review. Newcastle Ottawa scale was used to assess the risk of bias and GRADE to study the certainty of evidence. Articles were evaluated for the primary outcome (variation of MBF in different malocclusion groups) and confounding factors affecting MBF. Results All studies measured MBF in individuals with normal and malocclusion, with 2329 subjects having permanent dentition. A positive correlation of Class I normal occlusion with the bite force was seen compared to Class II and III malocclusion. Unilateral crossbite patients had lesser bite force. Six studies with 1023 males and 1175 females showed MBF more in males than females. In 3 studies (332 subjects), no significant difference for MBF between the right and left sides of the jaws was measured. Conclusion MBF decreases significantly with vertical and transverse craniofacial and dental discrepancy. Normal sagittal occlusion has more molar bite force than patients with different malocclusions. Also, MBF is more in males than females, and it increases with age. Registration PROSPERO CRD42021249328.
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Affiliation(s)
- Harneet Kaur
- Orthodontics and Dentofacial Orthopaedics, Jamia Millia Islamia, New Delhi, India
| | - Neelam Singh
- Department of Conservative Dentistry and Endodontics, Jamia Millia Islamia, New Delhi, India
| | - Harshita Gupta
- Postgraduate Student, Sudha Rastogi College of Dental Sciences and Research, Faridabad, Haryana, India
| | | | - Pushpjot Sadana
- Former Post Graduate Student of Shri Guru Ram Das Institute of Dental Sciences and Research, Amritsar, India
| | - Natasha Gupta
- Department of Conservative Dentistry and Endodontics, Jamia Millia Islamia, New Delhi, India
| | - Anuraj Kochhar
- Department of Orthodontics, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Ritasha Bhasin
- Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
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Wintergerst A, Gómez-Zúñiga RS. The effect of bolus size on masticatory parameters at swallowing threshold in children using a hard, solid, artificial test food. J Texture Stud 2022; 53:374-382. [PMID: 35243636 PMCID: PMC9313547 DOI: 10.1111/jtxs.12671] [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: 08/30/2021] [Revised: 02/23/2022] [Accepted: 02/25/2022] [Indexed: 11/28/2022]
Abstract
The effect of different bolus sizes on food breakdown has been studied in adults, but not in children. The objective of this study was to study median particle size (MPS) and other parameters of masticatory function at swallowing threshold (ST) in 8–10‐year‐old‐children with two different bolus sizes. A randomized crossover trial was undertaken in 89 eight to ten‐year‐old children. The study was performed with informed consent and ethical approval. The artificial test food used was made of a condensation silicone (Optosil Comfort) following a standardized protocol. Two bolus sizes (three or four quarters of a 20‐mm diameter, 5‐mm thick tablet) were randomized to avoid an order effect and tested in different sessions. Variables were: MPS (X50) at ST, number of cycles until ST, sequence and cycle duration as well as cycles/g. Comparisons were performed with paired t and Wilcoxon tests, regressions and correlations were run. Cutoff for statistical significance was .05. Statistically significant differences were found for all variables; X50 (2.5 ± 0.8 vs. 2.8 ± 0.7 mm, p < .001), cycles until ST (38 vs. 40, p = .022), sequence (25 vs. 27 s, p = .003), and cycle duration (650 vs. 683 ms, p = .015) and cycles/g (27 vs. 21 cycles/g, p < .001), three or four quarters, respectively. In conclusion, in children, as in adults, chewing on a bigger bolus size leads to a larger MPS (X50) at ST. When chewing on a larger bolus the number of cycles increases, but not enough to swallow the same particle size since the number of cycles/g is less with a bigger bolus size.
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Affiliation(s)
- Ana Wintergerst
- Graduate School of Dentistry, Universidad Nacional Autónoma de México, México City, México.,Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, México City, México
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Effect of malocclusion on jaw motor function and chewing in children: a systematic review. Clin Oral Investig 2022; 26:2335-2351. [PMID: 34985577 PMCID: PMC8898242 DOI: 10.1007/s00784-021-04356-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 12/29/2021] [Indexed: 12/04/2022]
Abstract
Objective To investigate the effects of dental/skeletal malocclusion and orthodontic treatment on four main objective parameters of chewing and jaw function (maximum occlusal bite force [MOBF], masticatory muscle electromyography [EMG], jaw kinematics, and chewing efficiency/performance) in healthy children. Materials and methods Systematic searches were conducted in MEDLINE (OVID), Embase, and the Web of Science Core Collection. Studies that examined the four parameters in healthy children with malocclusions were included. The quality of studies and overall evidence were assessed using the Joanna Briggs Institute and GRADE tools, respectively. Results The searches identified 8192 studies; 57 were finally included. The quality of included studies was high in nine studies, moderate in twenty-three studies, and low in twenty-five studies. During the primary dentition, children with malocclusions showed similar MOBF and lower chewing efficiency compared to control subjects. During mixed/permanent dentition, children with malocclusion showed lower MOBF and EMG activity and chewing efficiency compared to control subjects. The jaw kinematics of children with unilateral posterior crossbite showed a larger jaw opening angle and a higher frequency of reverse chewing cycles compared to crossbite-free children. There was a low to moderate level of evidence on the effects of orthodontic treatment in restoring normal jaw function. Conclusions Based on the limitations of the studies included, it is not entirely possible to either support or deny the influence of dental/skeletal malocclusion traits on MOBF, EMG, jaw kinematics, and masticatory performance in healthy children. Furthermore, well-designed longitudinal studies may be needed to determine whether orthodontic treatments can improve chewing function in general. Clinical relevance Comprehensive orthodontic treatment, which includes evaluation and restoration of function, may or may not mitigate the effects of malocclusion and restore normal chewing function. Supplementary Information The online version contains supplementary material available at 10.1007/s00784-021-04356-y.
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Schmidt A, Schlenz MA, Gäbler CS, Schlee S, Wöstmann B. Development of a New Application-Based Chewing Efficiency Test (Mini Dental Assessment) and Its Evaluation by Nursing Staff in Geriatric Care: A Pilot Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182211889. [PMID: 34831643 PMCID: PMC8625330 DOI: 10.3390/ijerph182211889] [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: 10/05/2021] [Revised: 11/01/2021] [Accepted: 11/09/2021] [Indexed: 11/28/2022]
Abstract
The increasing average life expectancy worldwide results in an elderly population with significant health care needs. However, dental care is often not a focus of care. It is well known that oral and overall health are directly related. Therefore, the Mini Dental Assessment (MDA) was developed to provide a simple analysis of oral health status, although it is currently only available in paper form, with all associated drawbacks, from illegible writing to the inability to quickly search the collected forms. This study aimed to develop a digital application (app) for mobile devices that can overcome the problems associated with paper forms. After the digital MDA was developed, its usability was evaluated by nurses, a questionnaire was answered, and it was compared to the analog MDA with patients in a pilot study. The usability of the app (System Usability Scale) was 95.18 ± 4.26, representing a very high usability. Furthermore, this app showed good clinical applicability. The results also showed that the digital MDA was accepted by nurses in their daily routine and was preferred to the analog MDA. A follow-up study with a higher number of subjects is highly recommended.
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Affiliation(s)
- Alexander Schmidt
- Dental Clinic, Department of Prosthodontics, Justus Liebig University Giessen, 35392 Giessen, Germany; (A.S.); (C.S.G.); (B.W.)
| | - Maximiliane Amelie Schlenz
- Dental Clinic, Department of Prosthodontics, Justus Liebig University Giessen, 35392 Giessen, Germany; (A.S.); (C.S.G.); (B.W.)
- Correspondence:
| | - Clara Sophie Gäbler
- Dental Clinic, Department of Prosthodontics, Justus Liebig University Giessen, 35392 Giessen, Germany; (A.S.); (C.S.G.); (B.W.)
| | - Steffen Schlee
- Department of Geriatrics, County Hospital Frankenberg, 35066 Frankenberg, Germany;
| | - Bernd Wöstmann
- Dental Clinic, Department of Prosthodontics, Justus Liebig University Giessen, 35392 Giessen, Germany; (A.S.); (C.S.G.); (B.W.)
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Fujita Y, Ohno Y, Ohno K, Takeshima T, Maki K. Differences in the factors associated with tongue pressure between children with class I and Class II malocclusions. BMC Pediatr 2021; 21:476. [PMID: 34711201 PMCID: PMC8555142 DOI: 10.1186/s12887-021-02956-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Accepted: 10/19/2021] [Indexed: 11/25/2022] Open
Abstract
Background The relationship between tongue pressure and masticatory performance during the mixed dentition period in cases of Class II malocclusion has not been clarified. The aim of this study was to determine differences in tongue pressure-related factors, including maxillofacial morphology and masticatory performance, between Class I and Class II malocclusions during the mixed dentition period. Methods A total of 56 children with Class I malocclusion (12 boys, 16 girls) or Class II malocclusion (16 boys, 12 girls) with mixed dentition were included in the present study. Height, body weight, hand grip strength, maximum occlusal force, maximum tongue pressure, masticatory performance, and the number of decayed, missing, and filled teeth were measured in all participants. Their lateral cephalograms were also evaluated. The means of all measurements were compared between Class I and Class II malocclusions. Pearson’s correlation coefficients were used to determine associations between maximum tongue pressure and other variables for each type of malocclusion. Results The maximum tongue pressure, hand grip strength, and maximum occlusal force in the Class II malocclusion group were significantly lower than those in the Class I malocclusion group (all, p < 0.05). The maximum tongue pressure was significantly positively correlated with hand grip strength, maximum occlusal force, masticatory performance, and SNB (sella, nasion, B point) angle in the Class I group (all, p < 0.05), and with height, body weight, and labial inclination of the central incisors in the Class II group (all, p < 0.05). Conclusions The maxillofacial morphometric factors associated with tongue pressure were clearly different between cases of Class I and Class II malocclusion with mixed dentition. Masticatory performance and tongue pressure were significantly positively correlated in cases of Class I malocclusion, but not in cases of Class II malocclusion.
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Affiliation(s)
- Yuko Fujita
- Division of Developmental Stomatognathic Function Science, Department of Health Promotion, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, 803-8580, Kitakyushu, Japan.
| | - Yoma Ohno
- Division of Developmental Stomatognathic Function Science, Department of Health Promotion, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, 803-8580, Kitakyushu, Japan
| | - Keitaro Ohno
- Division of Developmental Stomatognathic Function Science, Department of Health Promotion, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, 803-8580, Kitakyushu, Japan
| | - Tomohiro Takeshima
- Division of Developmental Stomatognathic Function Science, Department of Health Promotion, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, 803-8580, Kitakyushu, Japan
| | - Kenshi Maki
- Division of Developmental Stomatognathic Function Science, Department of Health Promotion, Kyushu Dental University, 2-6-1 Manazuru, Kokurakita-ku, 803-8580, Kitakyushu, Japan
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Zenthöfer A, Ehret J, Zajac M, Kilian S, Kostunov J, Rammelsberg P, Klotz AL. How Do Changes in Oral Health and Chewing Efficiency Affect the Changes of Oral-Health-Related Quality of Life of Nursing-Home Residents in the Short Term? Clin Interv Aging 2021; 16:789-798. [PMID: 34007164 PMCID: PMC8123974 DOI: 10.2147/cia.s303197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 03/26/2021] [Indexed: 12/02/2022] Open
Abstract
Objective To evaluate how changes in oral health and chewing efficiency affect the changes in oral-health-related quality of life (OHRQoL) of nursing-home residents over six months. Methods The study was conducted in nine nursing homes. Sociodemographic and general data were collected for all eligible individuals (n = 150). Of these, 114 participants (mean age 82.0 [± 9.5] years, 77.2% women) were available for the following tests at baseline and six months later: a comprehensive examination of dental and general health, a two-colour mixing-ability test (to assess chewing efficiency), the Geriatric Oral Health Assessment Index (GOHAI; to evaluate the OHRQoL), and the Mini Mental State Examination (MMSE; to diagnose the presence and severity of dementia). Univariate and multivariate linear regression models were compiled to analyse possible factors affecting OHRQoL. Results For the final analysis, 108 participants were available. For the study cohort as a whole, a decrease in the number of functional occluding pairs (C: 0.195; p = 0.034) and an increase in dental-treatment needs (C: −1.968; p = 0.056) had the greatest negative effects on OHRQoL as expressed by the GOHAI score. For denture wearers, a deterioration of denture condition (C: −2.946; p = 0.003) was the most important predictor for a decline in OHRQoL. Conclusion A short-term decline in oral health and function affects the OHRQoL of nursing-home residents. The most important dental variables in this regard are the number of functional occluding pairs and dental and denture-related treatment needs.
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Affiliation(s)
- Andreas Zenthöfer
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg, 69120, Germany
| | - Judith Ehret
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg, 69120, Germany
| | - Melania Zajac
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg, 69120, Germany
| | - Samuel Kilian
- University of Heidelberg, Institute of Medical Biometry and Informatics, Heidelberg, 69120, Germany
| | - Jana Kostunov
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg, 69120, Germany
| | - Peter Rammelsberg
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg, 69120, Germany
| | - Anna-Luisa Klotz
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg, 69120, Germany
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12
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Nalamliang N, Sumonsiri P, Thongudomporn U. Masticatory performance is influenced by masticatory muscle activity balance and the cumulative occlusal contact area. Arch Oral Biol 2021; 126:105113. [PMID: 33826961 DOI: 10.1016/j.archoralbio.2021.105113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 03/16/2021] [Accepted: 03/25/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To investigate the influence of masticatory muscle activity balance, occlusal contact area balance and the area of occlusal contact on masticatory performance in healthy dentate adults. DESIGN This cross-sectional study included ninety-three healthy subjects with complete dentition. Surface electromyography (sEMG) was used to record bilateral anterior temporalis activity and masseter muscle activity during maximum voluntary clenching and while chewing a test food. Seven levels of area of occlusal contact and near contact (ACNC) were registered and calculated cumulatively. The percentage overlapping coefficients were calculated for both muscle groups at maximum voluntary clenching and chewing and all levels of ACNC. Masticatory performance was measured by determining the median particle size of frankfurter sausage after 15 chewing cycles. Pearson's correlation and stepwise multiple linear regression analyses were used to assess the correlations between variables and the influence of the variables on masticatory performance, respectively, at the 0.05 level of significance. RESULTS Muscle balance during clenching and chewing, all near contact levels of cumulative ACNC and ACNC balance correlated negatively with median particle size (P < 0.05). The model based on stepwise multiple linear regression analysis showed muscle balance during clenching and cumulative ACNC at < 250 μm influenced median particle size. CONCLUSION Masticatory muscle activity balance during maximum voluntary clenching and the cumulative amount of near contact area were associated with masticatory performance, suggesting the amount of occlusal contact area-as well the balance of masticatory muscle activity-play a role in masticatory performance.
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Affiliation(s)
- Napat Nalamliang
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | | | - Udom Thongudomporn
- Orthodontic Section, Department of Preventive Dentistry, Faculty of Dentistry, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
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Moltoni G, D'Arco F, Rossi-Espagnet MC, James G, Hayward R. Observations on the growth of temporalis muscle: A 3D CT imaging study. J Anat 2020; 238:1218-1224. [PMID: 33280101 PMCID: PMC8053578 DOI: 10.1111/joa.13370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 10/26/2020] [Accepted: 11/09/2020] [Indexed: 11/29/2022] Open
Abstract
This study investigates the hypothesis that there is, during childhood, a disproportionate age-related expansion of the origin of temporalis muscle compared to the growth of the underlying skull. Lateral projections of 50 randomly selected 3D reformatted computerized tomographic (CT) scans (yielding 100 temporalis muscles) of children aged >0.6 to 15 years scanned for conditions that did not affect the shape of their head or face were windowed to provide the optimum delineation of temporalis muscle against the underlying bone. Vertical and anterior-posterior measurements of the muscle made independently by two observers were compared with those of the skull along the same planes. The development of the anterior temporal crest was also assessed. The intraclass correlation coefficient for differences in the measurements made by each observer ranged from good to excellent. The muscle and skull measurements were used to produce a ratio of muscle-to-skull lengths in both vertical and horizontal planes. Analysis of these ratios showed a statistically significant increase in the vertical reach of temporalis with age (Pearson correlation coefficient (R) =0.7826; p < 0.05) compared to the growth of the skull along the planes chosen for the study-but less so for its horizontal reach (R = 0.5073. p < .001). There were no significant differences between right/left or male/female measurements. There was also a substantial level of agreement between both observers in their assessment of the development of the temporal crest. The mean age of children in whom a fully formed temporal crest could be identified (10.6 years) was significantly greater (p < 0.001) than that of the 38 remaining subjects (6.0 years). These results confirm that there is, in response to increased masticatory/dietary demands during childhood, a disproportionate increase in the vertical and (to a lesser extent) horizontal reach of temporalis muscle over its origin from the temporal, frontal, sphenoid, and parietal bones compared the growth of the skull. It is proposed that surgical interference with this normal process is responsible for the soft tissue component of late-developing deformity that can occur following early (at 6-18 months of age) operations for the correction of trigonocephalic head shape associated with metopic synostosis.
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Affiliation(s)
- Giulia Moltoni
- Neuroradiology Unit, Department of Neuroscienze, Salute Mentale e Organi di Senso (NESMOS), Sapienza University, Rome, Italy
| | - Felice D'Arco
- Department of Neuroradiology, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| | - Maria Camilla Rossi-Espagnet
- Neuroradiology Unit, Department of Neuroscienze, Salute Mentale e Organi di Senso (NESMOS), Sapienza University, Rome, Italy.,Neuroradiology Unit, Imaging Department, Bambino Gesù Children's Hospital, Rome, Italy
| | - Greg James
- Departments of Craniofacial Surgery and Paediatric Neurosurgery, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| | - Richard Hayward
- Departments of Craniofacial Surgery and Paediatric Neurosurgery, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
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Shim J, Ho KCJ, Shim BC, Metaxas A, Somogyi-Ganss E, Di Sipio R, Cioffi I. Impact of post-orthodontic dental occlusion on masticatory performance and chewing efficiency. Eur J Orthod 2020; 42:587-595. [PMID: 31768524 DOI: 10.1093/ejo/cjz095] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND Whether precise orthodontic detailing of occlusion impacts masticatory function is unknown. In this study, we aimed to assess the impact of post-orthodontic dental occlusion on masticatory performance and chewing efficiency. MATERIALS AND METHODS Fifty-four adults who completed orthodontic treatment were categorized into two groups using the American Board of Orthodontics (ABO) model grading system: one meeting ABO standards (ABO, N = 29), the other failing to meet them (non-ABO, N = 25). The electromyographic (EMG) signals of the anterior temporalis (AT) and superficial masseter muscles were recorded bilaterally during static (clenching) and dynamic (gum chewing) tests. Chewing efficiency was measured by calculating the median particle size (MPS) and broadness of particle distribution (BPD) after five chewing trials of experimental silicone food at a standardized chewing rate. RESULTS Participants of the ABO group had a slightly more symmetric activation of the AT muscles during clenching (P = 0.016) and chewed a gum at a slower rate (P = 0.030). During the standardized chewing test with silicone food, ABO subjects had slightly greater EMG potentials at all muscle locations than non-ABO individuals (all P < 0.05). MPS and BDP did not differ significantly between groups (all P > 0.05). LIMITATIONS The severity of the initial malocclusion of the study participants was not in the statistical model as a potential confounder on the outcome measures. CONCLUSIONS Meeting ABO standards contributes to a slightly more balanced activation of the temporalis muscles during clenching and more efficient muscle recruitment during chewing but does not improve chewing efficiency.
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Affiliation(s)
- Jocelyne Shim
- Faculty of Dentistry, University of Toronto, ON, Canada
- Centre for Multimodal Sensorimotor and Pain Research, Faculty of Dentistry, University of Toronto, ON, Canada
| | - Ka Chun Jeremy Ho
- Faculty of Dentistry, University of Toronto, ON, Canada
- Centre for Multimodal Sensorimotor and Pain Research, Faculty of Dentistry, University of Toronto, ON, Canada
| | - Brian C Shim
- Faculty of Dentistry, University of British Columbia, Vancouver, BC, Canada
| | | | | | | | - Iacopo Cioffi
- Faculty of Dentistry, University of Toronto, ON, Canada
- Centre for Multimodal Sensorimotor and Pain Research, Faculty of Dentistry, University of Toronto, ON, Canada
- University of Toronto Centre for the Study of Pain, Toronto, ON, Canada
- Department of Dentistry, Mount Sinai Hospital, Toronto, ON, Canada
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Zenthöfer A, Ehret J, Zajac M, Kilian S, Rammelsberg P, Klotz AL. The Effects of Dental Status and Chewing Efficiency on the Oral-Health-Related Quality of Life of Nursing-Home Residents. Clin Interv Aging 2020; 15:2155-2164. [PMID: 33204080 PMCID: PMC7666994 DOI: 10.2147/cia.s273671] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/23/2020] [Indexed: 01/03/2023] Open
Abstract
Objective The aim of this study was to evaluate the effects of dental status and chewing efficiency on the oral-health-related quality of life (OHRQoL) of nursing-home residents. Materials and Methods The study was conducted in nine nursing homes. All eligible participants were included, and general and medical data, information about nutritional status and their dental and prosthetic status were collected. Chewing efficiency was assessed by means of a two-colour mixing-ability test. The simple count version of the Geriatric Oral Health Assessment Index (SC-GOHAI) was used to evaluate participants’ OHRQoL, and the Mini-Mental State Examination to classify the presence of cognitive impairment. Univariate and multivariate regression models were used to analyse data. Results The mean age of the participants was 82.1 (± 9.8) years and most participants suffered from at least very mild cognitive impairment. OHRQoL for all participants (n = 143) and denture wearers only (n = 105) was substantially associated with the type of prosthesis, the presence of natural teeth, the number of functional occluding pairs and dental and denture-related (if applicable) treatment needs. Furthermore, in both model’s univariate analysis showed that chewing efficiency also affected OHRQoL. In contrast, multivariate analysis of all participants revealed that only a higher number of functional occluding pairs (C: 0.250; p < 0.001), fewer dental treatment needs (C: −1.733; p = 0.019) and a better nutritional status (C: −1.298; p = 0.048) were relevant for better OHRQoL. For denture wearers, a higher number of functional occluding pairs (C: 0.192; p = 0.011), a better denture condition (C: −2.194; p= 0.003) and a higher body mass index (BMI) (C: 0.145; p = 0.006) were the main variables associated with better OHRQoL among participants. Conclusion Good oral health and oral function, including chewing efficiency, are associated with a high OHRQoL of nursing-home residents. However, few dental treatment needs, well-fitting dentures without treatment needs and a high number of functional occluding pairs seem to be the principal variables for an acceptable OHRQoL of nursing-home residents.
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Affiliation(s)
- Andreas Zenthöfer
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg 69120, Germany
| | - Judith Ehret
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg 69120, Germany
| | - Melania Zajac
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg 69120, Germany
| | - Samuel Kilian
- University of Heidelberg, Institute of Medical Biometry and Informatics, Heidelberg 69120, Germany
| | - Peter Rammelsberg
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg 69120, Germany
| | - Anna-Luisa Klotz
- University of Heidelberg, Dental School, Department of Prosthodontics, Heidelberg 69120, Germany
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16
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Souto-Souza D, Soares MEC, Primo-Miranda EF, Pereira LJ, Ramos-Jorge ML, Ramos-Jorge J. The influence of malocclusion, sucking habits and dental caries in the masticatory function of preschool children. Braz Oral Res 2020; 34:e059. [PMID: 32578802 DOI: 10.1590/1807-3107bor-2020.vol34.0059] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 04/13/2020] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to evaluate the association of malocclusion, nutritive and non-nutritive sucking habits and dental caries in the masticatory function of preschool children. A cross-sectional study was conducted with a sample of 384 children aged 3-5 years. A single examiner calibrated for oral clinical examinations performed all the evaluations (kappa > 0.82). Presence of malocclusion was recorded using Foster and Hamilton criteria. The number of masticatory units and of posterior teeth cavitated by dental caries was also recorded. The parents answered a questionnaire in the form of an interview, addressing questions about the child's nutritive and non-nutritive sucking habits. The masticatory function was evaluated using Optocal test material, and was based on the median particle size in the masticatory performance, on the swallowing threshold, and on the number of masticatory cycles during the swallowing threshold. Data analysis involved simple and multiple linear regression analyses, and the confidence level adopted was 95%. The sample consisted of 206 children in the malocclusion group and 178 in the non-malocclusion group. In the multiple regression analysis, the masticatory performance was associated with age (p = 0.025), bottle feeding (p = 0.004), presence of malocclusion (p = 0.048) and number of cavitated posterior teeth (p = 0.030). The swallowing threshold was associated with age (p = 0.025), bottle feeding (p = 0.001) and posterior malocclusion (p = 0.017). The number of masticatory cycles during the swallowing threshold was associated with the number of cavitated posterior teeth (p = 0.001). In conclusion, posterior malocclusion, bottle feeding and dental caries may interfere in the masticatory function of preschool children.
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Affiliation(s)
- Débora Souto-Souza
- Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, School of Basic Sciences and Health, Department of Dentistry, Diamantina, MG, Brazil
| | - Maria Eliza Consolação Soares
- Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, School of Basic Sciences and Health, Department of Dentistry, Diamantina, MG, Brazil
| | - Ednele Fabyene Primo-Miranda
- Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, School of Basic Sciences and Health, Department of Dentistry, Diamantina, MG, Brazil
| | - Luciano José Pereira
- Universidade Federal de Lavras, School of Medicine, Department of Physiology and Pharmacology, Lavras, Minas Gerais, Brazil
| | - Maria Letícia Ramos-Jorge
- Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, School of Basic Sciences and Health, Department of Dentistry, Diamantina, MG, Brazil
| | - Joana Ramos-Jorge
- Universidade Federal de Minas Gerais - UFMG, School of Dentistry, Department of Pediatric Dentistry, Belo Horizonte, MG, Brazil
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17
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Hwang S, Choi YJ, Jung S, Kim S, Chung CJ, Kim KH. Posterior dental compensation and occlusal function in adults with different sagittal skeletal malocclusions. Korean J Orthod 2020; 50:98-107. [PMID: 32257935 PMCID: PMC7093660 DOI: 10.4041/kjod.2020.50.2.98] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 07/30/2019] [Accepted: 09/09/2019] [Indexed: 11/11/2022] Open
Abstract
Objective The aim of this study was to compare posterior tooth inclinations, occlusal force, and contact area of adults with different sagittal malocclusions. Methods Transverse skeletal parameters and posterior tooth inclinations were evaluated using cone beam computed tomography images, and occlusal force as well as contact area were assessed using pressure-sensitive films in 124 normodivergent adults. A linear mixed model was used to cluster posterior teeth into maxillary premolar, maxillary molar, mandibular premolar, and mandibular molar groups. Differences among Class I, II, and III groups were compared using an analysis of variance test and least significant difference post-hoc test. Correlations of posterior dental inclinations to occlusal function were analyzed using Pearson's correlation analysis. Results In male subjects, maxillary premolars and molars had the smallest inclinations in the Class II group while maxillary molars had the greatest inclinations in the Class III group. In female subjects, maxillary molars had the smallest inclinations in the Class II group, while maxillary premolars and molars had the greatest inclinations in the Class III group. Occlusal force and contact area were not significantly different among Class I, II, and III groups. Conclusions Premolar and molar inclinations showed compensatory inclinations to overcome anteroposterior skeletal discrepancy in the Class II and III groups; however, their occlusal force and contact area were similar to those of Class I group. In subjects with normodivergent facial patterns, although posterior tooth inclinations may vary, difference in occlusal function may be clinically insignificant in adults with Class I, II, and III malocclusions.
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Affiliation(s)
- Soonshin Hwang
- Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul, Korea
- Department of Orthodontics and Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | - Yoon Jeong Choi
- Department of Orthodontics and Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | - Sooin Jung
- Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul, Korea
- Department of Orthodontics and Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | - Sujin Kim
- Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul, Korea
- Department of Orthodontics and Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | - Chooryung J. Chung
- Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul, Korea
- Department of Orthodontics and Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
| | - Kyung-Ho Kim
- Department of Orthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul, Korea
- Department of Orthodontics and Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea
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Klotz A, Ehret J, Zajac M, Schwindling FS, Hassel AJ, Rammelsberg P, Zenthöfer A. The effects of prosthetic status and dementia on the chewing efficiency of seniors in nursing homes. J Oral Rehabil 2019; 47:377-385. [DOI: 10.1111/joor.12912] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 09/29/2019] [Accepted: 11/14/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Anna‐Luisa Klotz
- Department of Prosthodontics Dental School University of Heidelberg Heidelberg Germany
| | - Judith Ehret
- Department of Prosthodontics Dental School University of Heidelberg Heidelberg Germany
| | - Melania Zajac
- Department of Prosthodontics Dental School University of Heidelberg Heidelberg Germany
| | | | | | - Peter Rammelsberg
- Department of Prosthodontics Dental School University of Heidelberg Heidelberg Germany
| | - Andreas Zenthöfer
- Department of Prosthodontics Dental School University of Heidelberg Heidelberg Germany
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Negishi S, Richards LC, Kasai K. Relation of dietary preference to masticatory movement and masticatory exercises in Japanese children. Arch Oral Biol 2019; 108:104540. [PMID: 31513984 DOI: 10.1016/j.archoralbio.2019.104540] [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: 06/03/2019] [Revised: 08/20/2019] [Accepted: 08/25/2019] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Modern Japanese children have decreased masticatory function, which can be explained by the dietary change to soft foods. In earlier studies involving children with mixed dentition, masticatory exercises were shown to improve masticatory function and modify dental arch growth. Grinding type of mastication with a wide path reportedly increases lateral growth of the dental arch. This study aimed to assess the relationship between masticatory movements and dietary preference, and how masticatory exercises affected masticatory movement during Hellman's dental stages IIA to IIC (period of first molar eruption). DESIGN In 64 Japanese pre-school children, we measured masticatory movements with foods of five different levels of hardness and investigated the dietary preference for hard foods through a questionnaire. Participants were also required to perform masticatory exercises. Masticatory movements and dietary preference for hard foods were assessed at the start (T1), conclusion (T2), and after six months of exercises (T3). Participants were allocated to Wide and Narrow groups at T1 based on their masticatory path width. RESULTS Baguettes and bananas resulted in the widest and narrowest masticatory paths, respectively, at T1. Results of questionnaire indicated that those eating hard foods had a broad grinding type of masticatory path. Masticatory exercises significantly widened the masticatory path in the Narrow group demonstrating that masticatory exercises help children learn to chew with grinding strokes. Moreover, the masticatory path remained stable on assessment at T3 (six-month follow-up). CONCLUSIONS Masticatory exercises are effective in children who are unable to grind hard foods, affecting their dietary preferences.
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Affiliation(s)
- Shinichi Negishi
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Japan; The University of Adelaide Dental School, Australia.
| | | | - Kazutaka Kasai
- Department of Orthodontics, Nihon University School of Dentistry at Matsudo, Japan
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20
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Costa ES, Cazal MS, Mestriner Junior W, Pithon MM, Guimarães AS. Masticatory performance between individuals with good overbite and patients with anterior open bite. J World Fed Orthod 2019. [DOI: 10.1016/j.ejwf.2018.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Association of feeding behavior with jaw bone metabolism and tongue pressure. JAPANESE DENTAL SCIENCE REVIEW 2018; 54:174-182. [PMID: 30302136 PMCID: PMC6175966 DOI: 10.1016/j.jdsr.2018.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 04/12/2018] [Accepted: 05/23/2018] [Indexed: 12/26/2022] Open
Abstract
In recent decades, the eating habits of children and adolescents have undergone many changes due to the diversification of lifestyles worldwide. Reduced masticatory function in growing animals results in changes in the mandible, including a decrease in bone mass. However, the influence of different eating behaviors on jaw bone metabolism (e.g., the palatal palate) during the growth period is not fully understood. In addition, recent clinical studies reported that masticatory performance is positively related to tongue pressure in adults, but no consensus has been reached regarding whether tongue pressure is related to masticatory performance in children. This review summarizes current findings related to these issues, focusing on the influence of different feeding behaviors on jaw bone metabolism, including the development of tongue pressure. Consumption of a soft diet had a negative impact on jaw bone metabolism in the maxilla and mandible of rats; however, mastication of a hard diet recovered the collapsed equilibrium of bone turnover caused by a soft diet during growth. Tongue pressure is closely associated with an increase in masticatory performance in children. Peak maximum tongue pressure is reached earlier in women than in men. Before reaching adulthood, women require intervention to increase their peak tongue pressure.
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22
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Tewksbury CD, Callaghan KX, Fulks BA, Gerstner GE. Individuality of masticatory performance and of masticatory muscle temporal parameters. Arch Oral Biol 2018; 90:113-124. [PMID: 29597061 DOI: 10.1016/j.archoralbio.2018.03.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/25/2018] [Accepted: 03/18/2018] [Indexed: 10/17/2022]
Abstract
OBJECTIVE Mammalian mastication serves to improve intra-oral food reduction. Insufficient food reduction creates potential swallowing problems, whereas over-reduction may accelerate tooth wear and increase feeding time. Either extreme has consequences. The study's objectives were: (1) to study the relationship between food reduction, number of chews in a sequence, and chewing rate, (2) to study how controlling the number of chews and chewing rate variability affects food reduction, and (3) to assess how dentoskeletal morphological and electromyographical (EMG) characteristics impact food reduction. DESIGN Twenty-three healthy, fully-dentate adults chewed a standardized test food under three conditions: (1) no control, (2) number of chews controlled, and (3) number of chews and chewing rate controlled. EMG activity was sampled from masseter and temporalis muscles bilaterally. Demographic, occlusal contact area in maximum intercuspation, and cephalometric data were obtained. RESULTS In uncontrolled conditions, food reduction and bout duration varied more than expected across subjects. Subjects with poor reduction under controlled conditions were those with poor reduction under uncontrolled conditions. Only occlusal contact area correlated with chewing performance under uncontrolled conditions. Chewing cycle duration, EMG burst duration, and EMG peak onset latency increased when the number of chews was restricted. EMG amplitude, a surrogate for bite force, increased in tasks controlling the number of chews and chewing rate. Chewing rate variability was difficult to diminish below individual-specific levels. CONCLUSIONS Results: provided evidence that bite force, chewing rate, chewing performance and chewing bout duration reflected individual preferences. Future work will determine whether similar findings occur among other mammals.
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Affiliation(s)
- Claire D Tewksbury
- Department of Biologic and Materials Sciences, 1011 N. University Ave., School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA
| | - Kathryn X Callaghan
- Department of Biologic and Materials Sciences, 1011 N. University Ave., School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA
| | - Brent A Fulks
- Department of Orthodontics and Pediatric Dentistry, 1011 N. University Ave., School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA
| | - Geoffrey E Gerstner
- Department of Biologic and Materials Sciences, 1011 N. University Ave., School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA.
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Fujita Y, Ichikawa M, Hamaguchi A, Maki K. Comparison of masticatory performance and tongue pressure between children and young adults. Clin Exp Dent Res 2018; 4:52-58. [PMID: 29744216 PMCID: PMC5893476 DOI: 10.1002/cre2.104] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 01/24/2018] [Accepted: 01/29/2018] [Indexed: 12/20/2022] Open
Abstract
The aims of the present study were to evaluate whether there are significant differences in masticatory performance by gender and dental stage. We also determined the factors directly associated with the masticatory performance in children, and those directly associated with masticatory performance in young adults. The study included 180 subjects, ranging in age from 6 to 12 years or 20 to 33 years. The subjects were divided into three groups according to the Hellman developmental stage (III A, III B, or VA); the groups were the subdivided according to gender. The body mass index (BMI), maximum tongue pressure, and sum of decayed, missing, and filled teeth (DMFT) were determined in all subjects. To investigate masticatory performance, the total number and maximum projected area of chewed particles of the jelly materials were measured. Masticatory performance had the highest values at Stage VA in both males and females. Regarding the maximum tongue pressure in females, Stage III B had the highest value of all stages. Multiple regression analysis showed that masticatory performance was associated with DMFT index, maximum tongue pressure, and BMI in children. Among young adults, masticatory performance was associated with DMFT index and maximum tongue pressure. Better masticatory performance is directly associated with better dental status, a higher BMI, and tongue pressure in schoolchildren. Additionally, masticatory performance was well-correlated with tongue pressure in young adults, although maximum tongue pressure reached its peak before Stage VA in females. We suggest that females need training with respect to tongue pressure, by the mixed dentition stage.
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Affiliation(s)
- Yuko Fujita
- Division of Developmental Stomatognathic Function Science, Department of Health Promotion Kyushu Dental University Japan
| | - Maika Ichikawa
- Division of Developmental Stomatognathic Function Science, Department of Health Promotion Kyushu Dental University Japan
| | - Ayako Hamaguchi
- Division of Developmental Stomatognathic Function Science, Department of Health Promotion Kyushu Dental University Japan
| | - Kenshi Maki
- Division of Developmental Stomatognathic Function Science, Department of Health Promotion Kyushu Dental University Japan
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Hama Y, Hosoda A, Komagamine Y, Gotoh S, Kubota C, Kanazawa M, Minakuchi S. Masticatory performance-related factors in preschool children: establishing a method to assess masticatory performance in preschool children using colour-changeable chewing gum. J Oral Rehabil 2017; 44:948-956. [DOI: 10.1111/joor.12553] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/23/2017] [Indexed: 11/29/2022]
Affiliation(s)
- Y. Hama
- Gerodontology and Oral rehabilitation; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
| | - A. Hosoda
- Division of Medical Nutrition; Faculty of Healthcare; Tokyo Healthcare University; Tokyo Japan
| | - Y. Komagamine
- Gerodontology and Oral rehabilitation; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
| | - S. Gotoh
- Pediatric Dentistry; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
| | - C. Kubota
- National Institute of Public Health; Tokyo Japan
| | - M. Kanazawa
- Gerodontology and Oral rehabilitation; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
| | - S. Minakuchi
- Gerodontology and Oral rehabilitation; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
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Kaya MS, Güçlü B, Schimmel M, Akyüz S. Two-colour chewing gum mixing ability test for evaluating masticatory performance in children with mixed dentition: validity and reliability study. J Oral Rehabil 2017; 44:827-834. [DOI: 10.1111/joor.12548] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/19/2017] [Indexed: 11/29/2022]
Affiliation(s)
- M. S. Kaya
- Department of Pediatric Dentistry; Bezmialem Vakif University; Istanbul Turkey
| | - B. Güçlü
- Institute of Biomedical Engineering; Boğaziçi University; Istanbul Turkey
| | - M. Schimmel
- Division of Gerodontology; School of Dental Medicine; University of Bern; Bern Switzerland
- Division of Gerodontology and Removable Prosthodontics; Dental University Clinic; University of Geneva; Geneva Switzerland
| | - S. Akyüz
- Department of Pediatric Dentistry; Marmara University; Istanbul Turkey
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Fontaine-Sylvestre C, Roy A, Rizkallah J, Dabbagh B, Ferraz dos Santos B. Prevalence of malocclusion in Canadian children with autism spectrum disorder. Am J Orthod Dentofacial Orthop 2017; 152:38-41. [DOI: 10.1016/j.ajodo.2017.02.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 02/01/2017] [Accepted: 02/01/2017] [Indexed: 11/16/2022]
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Bae J, Son WS, Kim SS, Park SB, Kim YI. Comparison of masticatory efficiency according to Angle's classification of malocclusion. Korean J Orthod 2017; 47:151-157. [PMID: 28523241 PMCID: PMC5432436 DOI: 10.4041/kjod.2017.47.3.151] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 10/27/2016] [Accepted: 11/01/2016] [Indexed: 12/05/2022] Open
Abstract
Objective The objective of this study was to investigate the differences in masticatory efficiency among patients with different Angle's classes of malocclusion and to assess the correlation between masticatory efficiency and the occlusal contact area. Methods The mixing ability index (MAI) was calculated for measuring masticatory efficiency of 61 adult patients according to Angle's classifications of malocclusion. The study included 25, 15, and 21 patients with Angle's Class I, II, and III malocclusions, respectively. Silicone interocclusal recording material was used to measure the occlusal contact area. Results Both the MAI and occlusal contact area showed the highest average values in the Class I malocclusion group, followed by the Class II and Class III malocclusion groups. No significant difference was observed in the MAI values between the Class I and Class II malocclusion groups (p > 0.05), whereas a significant difference was observed between the Class I and Class III malocclusion groups (p < 0.01) and between the Class II and Class III malocclusion groups (p < 0.05). A weak positive correlation was also observed between the MAI and occlusal contact area (p < 0.01, r2 = 0.13). Conclusions The results of this study indicated that masticatory efficiency was the highest in patients with Angle's Class I malocclusion, followed by those with Angle's Class II and Angle's Class III malocclusions. Moreover, a weak positive correlation was observed between masticatory efficiency and the occlusal contact area.
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Affiliation(s)
- Jungin Bae
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, Korea
| | - Woo-Sung Son
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, Korea
| | - Seong-Sik Kim
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, Korea
| | - Soo-Byung Park
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, Korea
| | - Yong-Il Kim
- Department of Orthodontics, Pusan National University Dental Hospital, Yangsan, Korea.,Dental Research Institute, Pusan National University Dental Hospital, Yangsan, Korea.,Institute of Translational Dental Sciences, Pusan National University, Busan, Korea
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Bourdiol P, Soulier-Peigue D, Lachaze P, Nicolas E, Woda A, Hennequin M. Only severe malocclusion correlates with mastication deficiency. Arch Oral Biol 2017; 75:14-20. [DOI: 10.1016/j.archoralbio.2016.12.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 12/01/2016] [Accepted: 12/03/2016] [Indexed: 10/20/2022]
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29
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Garcia MA, Rios D, Honório HM, Trindade-Suedam IK. Bite force of children with repaired unilateral and bilateral cleft lip and palate. Arch Oral Biol 2016; 68:83-7. [DOI: 10.1016/j.archoralbio.2016.03.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 03/03/2016] [Accepted: 03/29/2016] [Indexed: 12/01/2022]
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30
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Ichikawa M, Fujita Y, Hamaguchi A, Chaweewannakorn W, Maki K. Association of tongue pressure with masticatory performance and dental conditions in Japanese children. PEDIATRIC DENTAL JOURNAL 2016. [DOI: 10.1016/j.pdj.2015.12.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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31
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Marquezin MCS, Pedroni-Pereira A, Araujo DS, Rosar JV, Barbosa TS, Castelo PM. Descriptive analysis of the masticatory and salivary functions and gustatory sensitivity in healthy children. Acta Odontol Scand 2016; 74:443-8. [PMID: 27248615 DOI: 10.1080/00016357.2016.1191085] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVE The objective of this study is to better understand salivary and masticatory characteristics, this study evaluated the relationship among salivary parameters, bite force (BF), masticatory performance (MP) and gustatory sensitivity in healthy children. The secondary outcome was to evaluate possible gender differences. MATERIALS AND METHODS One hundred and sixteen eutrophic subjects aged 7-11 years old were evaluated, caries-free and with no definite need of orthodontic treatment. Salivary flow rate and pH, total protein (TP), alpha-amylase (AMY), calcium (CA) and phosphate (PHO) concentrations were determined in stimulated (SS) and unstimulated saliva (US). BF and MP were evaluated using digital gnathodynamometer and fractional sieving method, respectively. Gustatory sensitivity was determined by detecting the four primary tastes (sweet, salty, sour and bitter) in three different concentrations. Data were evaluated using descriptive statistics, Mann-Whitney/t-test, Spearman correlation and multiple regression analysis, considering α = 0.05. RESULTS Significant positive correlation between taste and age was observed. CA and PHO concentrations correlated negatively with salivary flow and pH; sweet taste scores correlated with AMY concentrations and bitter taste sensitivity correlated with US flow rate (p < 0.05). No significant difference between genders in salivary, masticatory characteristics and gustatory sensitivity was observed. The regression analysis showed a weak relationship between the distribution of chewed particles among the different sieves and BF. CONCLUSIONS The concentration of some analytes was influenced by salivary flow and pH. Age, saliva flow and AMY concentrations influenced gustatory sensitivity. In addition, salivary, masticatory and taste characteristics did not differ between genders, and only a weak relation between MP and BF was observed.
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Maria Wintergerst A, Lucila Garza-Ballesteros A, Carlos Garnica-Palazuelos J. Bolus size for the evaluation of masticatory performance in 8–10-year-old children: a pilot study. Cranio 2016; 34:257-63. [DOI: 10.1179/2151090315y.0000000024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Abstract
OBJECTIVES Studies involving electrognathographic (EGN) recordings of chewing improvements obtained following occlusal adjustment therapy are rare, as most studies lack 'chewing' within the research. The objectives of this study were to determine if reducing long Disclusion Time to short Disclusion Time with the immediate complete anterior guidance development (ICAGD) coronoplasty in symptomatic subjects altered their average chewing pattern (ACP) and their muscle function. METHODS Twenty-nine muscularly symptomatic subjects underwent simultaneous EMG and EGN recordings of right and left gum chewing, before and after the ICAGD coronoplasty. Statistical differences in the mean Disclusion Time, the mean muscle contraction cycle, and the mean ACP resultant from ICAGD underwent the Student's paired t-test (α = 0.05). RESULTS Disclusion Time reductions from ICAGD were significant (2.11-0.45 s. p = 0.0000). Post-ICAGD muscle changes were significant in the mean area (p = 0.000001), the peak amplitude (p = 0.00005), the time to peak contraction (p < 0.000004), the time to 50% peak contraction (p < 0.00001), and in the decreased number of silent periods per side (right p < 0.0000002; left p < 0.0000006). Post-ICAGD ACP changes were also significant; the terminal chewing position became closer to centric occlusion (p < 0.002), the maximum and average chewing velocities increased (p < 0.002; p < 0.00005), the opening and closing times, the cycle time, and the occlusal contact time all decreased (p < 0.004-0.0001). CONCLUSION The average chewing pattern (ACP) shape, speed, consistency, muscular coordination, and vertical opening improvements can be significantly improved in muscularly dysfunctional TMD patients within one week's time of undergoing the ICAGD enameloplasty. Computer-measured and guided occlusal adjustments quickly and physiologically improved chewing, without requiring the patients to wear pre- or post-treatment appliances.
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Affiliation(s)
- Robert B Kerstein
- a Former faculty, Tufts University School of Dental Medicine , Department of Restorative Dentistry , Boston , MA , USA
| | - John Radke
- b BioResearch Associates Inc. , Milwaukee , WI , USA
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Miller SF, Vela KC, Levy SM, Southard TE, Gratton DG, Moreno Uribe LM. Patterns of morphological integration in the dental arches of individuals with malocclusion. Am J Hum Biol 2016; 28:879-889. [PMID: 27292446 DOI: 10.1002/ajhb.22880] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 02/04/2016] [Accepted: 05/10/2016] [Indexed: 11/11/2022] Open
Abstract
OBJECTIVES In humans, there is a large range of variation in the form of the maxillary and mandibular dental arches. This variation can manifest as either prognathism or retrognathism in either or both arches, which can cause malocclusion and lead to abnormal masticatory function. This study aims to identify aspects of variation and morphological integration existing in the dental arches of individuals with different types of malocclusion. METHODS Coordinate landmark data were collected along the gingival margins of 397 scanned dental casts and then analyzed using geometric morphometric techniques to explore arch form variation and patterns of morphological integration within each malocclusion type. RESULTS Significant differences were identified between Class II forms (increased projection of upper arch relative to the lower arch) and Class III forms (lower arch projection beyond the upper arch) in symmetrical shape variation, including anteroposterior arch discrepancies and abnormal anterior arch divergence or convergence. Partial least squares analysis demonstrated that Class III dental arches have higher levels of covariance between upper and lower arches (RV = 0.91) compared to the dental arches of Class II (RV = 0.78) and Class I (RV = 0.73). These high levels of covariance, however, are on the lower end of the overall range of possible masticatory blocks, indicating weaker than expected levels of integration. CONCLUSIONS This study provides evidence for patterns of variation in dental arch shape found in individuals with Class II and Class III malocclusions. Moreover, differences in integration found between malocclusion types have ramifications for how such conditions should be studied and treated. Am. J. Hum. Biol. 28:879-889, 2016. © 2016Wiley Periodicals, Inc.
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Affiliation(s)
- Steven F Miller
- Dows Institute for Dental Research, College of Dentistry, University of Iowa, Iowa City, Iowa, 52242
| | - Kaci C Vela
- Orthodontics Private Practice, Iowa City, Iowa, 52242
| | - Steven M Levy
- Department of Preventive and Community Dentistry, College of Dentistry, University of Iowa, Iowa City, Iowa, 52242.,Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, Iowa, 52242
| | - Thomas E Southard
- Department of Orthodontics, College of Dentistry, University of Iowa, Iowa City, Iowa, 52242
| | - David G Gratton
- Department of Prosthodontics, College of Dentistry, University of Iowa, Iowa City, Iowa, 52242
| | - Lina M Moreno Uribe
- Dows Institute for Dental Research, College of Dentistry, University of Iowa, Iowa City, Iowa, 52242.,Department of Orthodontics, College of Dentistry, University of Iowa, Iowa City, Iowa, 52242
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Factors associated with masticatory performance among preschool children. Clin Oral Investig 2016; 21:159-166. [DOI: 10.1007/s00784-016-1768-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Accepted: 02/22/2016] [Indexed: 10/22/2022]
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36
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Flores-Orozco EI, Rovira-Lastra B, Willaert E, Peraire M, Martinez-Gomis J. Relationship between jaw movement and masticatory performance in adults with natural dentition. Acta Odontol Scand 2015; 74:103-7. [PMID: 26027883 DOI: 10.3109/00016357.2015.1048996] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE This study determines the relationship between several characteristics of jaw movement and masticatory performance determined by multiple regression analysis and adjusted for occlusal contact area and bite force. MATERIALS AND METHODS Forty-two young adults with natural dentition participated in this cross-sectional study. Occlusal contact area was determined at the maximum intercuspal position by scanning interocclusal records. Maximum unilateral force was measured by means of a gnathodynamometer. The height and amplitude of mastication, occlusal glide length, lateral guidance angle, anterior-posterior distance and cycle duration were recorded using the ARCUSdigma II system. Masticatory performance was determined by sieving the Optosil particles resulting from 20 chewing cycles. RESULTS Median particle size was negatively associated with height of mastication, maximum bite force, occlusal contact area and amplitude of mastication. Stepwise multiple linear regression analysis revealed that the height of mastication and dental guidance angle are the characteristics of jaw movement most closely related to masticatory performance. CONCLUSIONS In adults with natural dentition, a large vertical height of mastication and a small dental guidance angle are the characteristics of jaw movement most closely associated with good masticatory performance, determined by multiple regression analysis and adjusted for occlusal contact area and bite force.
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Affiliation(s)
- Elan Ignacio Flores-Orozco
- a 1 Department of Prosthodontics, Faculty of Dentistry, University of Barcelona , Barcelona, Spain
- b 2 Department of Prosthodontics, Faculty of Dentistry , Autonomous University of Nayarit , Tepic, Nayarit, México
| | - Bernat Rovira-Lastra
- a 1 Department of Prosthodontics, Faculty of Dentistry, University of Barcelona , Barcelona, Spain
- c 3 Oral Health and Masticatory System Group (Bellvitge Biomedical Research Institute) IDIBELL, L'Hospitalet de Llobregat , Barcelona, Spain
| | - Eva Willaert
- a 1 Department of Prosthodontics, Faculty of Dentistry, University of Barcelona , Barcelona, Spain
- c 3 Oral Health and Masticatory System Group (Bellvitge Biomedical Research Institute) IDIBELL, L'Hospitalet de Llobregat , Barcelona, Spain
| | - Maria Peraire
- a 1 Department of Prosthodontics, Faculty of Dentistry, University of Barcelona , Barcelona, Spain
- c 3 Oral Health and Masticatory System Group (Bellvitge Biomedical Research Institute) IDIBELL, L'Hospitalet de Llobregat , Barcelona, Spain
| | - Jordi Martinez-Gomis
- a 1 Department of Prosthodontics, Faculty of Dentistry, University of Barcelona , Barcelona, Spain
- c 3 Oral Health and Masticatory System Group (Bellvitge Biomedical Research Institute) IDIBELL, L'Hospitalet de Llobregat , Barcelona, Spain
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Araújo SCCSD, Vieira MM, Gasparotto CA, Bommarito S. Análise da força de mordida nos diferentes tipos de maloclusões dentárias, segundo Angle. REVISTA CEFAC 2014. [DOI: 10.1590/1982-021620145113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
OBJETIVO:analisar a máxima força de mordida na oclusão normal e maloclusões de Angle; observar a frequência de ocorrência dos tipos de oclusões; analisar a existência de diferença entre as medidas desta força e relacionar a força de mordida com índice de massa corpórea (IMC) de cada indivíduo.MÉTODOS: a amostra foi composta por 100 estudantes do curso de Fonoaudiologia, com faixas etárias entre 17 e 25 anos. Cada indivíduo realizou: 1) Anamnese: composta por dados de identificação pessoal, informações sobre alimentação diária; preferência mastigatória; peso e altura. 2) Classificação da oclusão dentária em: normal ou Classe I, II subdivisão 1ª e 2ª ou Classe III. 3) Avaliação da força de mordida por meio de um dinamômetro digital. Os resultados foram submetidos aos testes estatísticos: Kolmogorov-Smirnov, T-Student Pareado, Teste de Igualdade de Duas Proporções, Teste ANOVA, Comparação Múltipla de Tukey e Teste de Spearman.RESULTADOS:as maiores forças de mordida foram obtidas nos indivíduos com oclusão normal, seguida das maloclusões Classes I, II subdivisão 1ª e 2ª e III, respectivamente; houve maior frequência de ocorrência da maloclusão Classe I, seguida da oclusão normal, maloclusão Classes II subdivisão 1ª e 2ª e III; houve aumento da força média entre a primeira e terceira medida em ambos os lados; não houve correlação entre força de mordida e o índice de massa corpórea (IMC).CONCLUSÃO: o tipo de oclusão influenciou na força de mordida, sendo a maior força obtida após a terceira mensuração e não houve relação entre IMC e força de mordida.
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Takaki P, Vieira M, Bommarito S. Maximum bite force analysis in different age groups. Int Arch Otorhinolaryngol 2014; 18:272-6. [PMID: 25992105 PMCID: PMC4297017 DOI: 10.1055/s-0034-1374647] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 03/07/2014] [Indexed: 11/02/2022] Open
Abstract
Introduction Maximum bite force (MBF) is the maximum force performed by the subject on the fragmentation of food, directly related with the mastication and determined by many factors. Objective Analyze the MBF of subjects according to age groups. Methods One hundred individuals from the city of São Paulo were equally divided according to age groups and gender. Each individual submitted to a myotherapy evaluation composed of anthropometric measurements of height and weight to obtain body mass index (BMI), using a tape and a digital scale (Magna, G-life, São Paulo), and a dental condition and maximum bite force evaluation, using a digital dynamometer model DDK/M (Kratos, São Paulo, Brazil), on Newton scale. The dental and bite force evaluations were monitored by a professional from the area. Analysis of variance was used with MBF as a dependent variable, age group and gender as random factors, and BMI as a control variable. Results Till the end of adolescence, it was possible to observe a decrease in MBF in both sexes, with the male force greater than the female force. In young adults, the female force became greater the males, then decreased in adulthood. There was no correlation between MBF and BMI. Conclusion There are MBF variations that characterizes the human development stages, according to age groups.
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Affiliation(s)
- Patricia Takaki
- Speech Therapy Department, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Marilena Vieira
- Speech Therapy Department, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Silvana Bommarito
- Speech Therapy Department, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
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Kobayashi FY, Gavião MBD, Montes ABM, Marquezin MCS, Castelo PM. Evaluation of oro-facial function in young subjects with temporomandibular disorders. J Oral Rehabil 2014; 41:496-506. [DOI: 10.1111/joor.12163] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2014] [Indexed: 12/30/2022]
Affiliation(s)
- F. Y. Kobayashi
- Department of Pediatric Dentistry; Piracicaba Dental School; University of Campinas-UNICAMP; Piracicaba Brazil
| | - M. B. D. Gavião
- Department of Pediatric Dentistry; Piracicaba Dental School; University of Campinas-UNICAMP; Piracicaba Brazil
| | - A. B. M. Montes
- Department of Pediatric Dentistry; Piracicaba Dental School; University of Campinas-UNICAMP; Piracicaba Brazil
| | - M. C. S. Marquezin
- Department of Pediatric Dentistry; Piracicaba Dental School; University of Campinas-UNICAMP; Piracicaba Brazil
| | - P. M. Castelo
- Department of Biological Sciences; Federal University of São Paulo; Diadema Brazil
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Marquezin MCS, Gavião MBD, Alonso MBCC, Ramirez-Sotelo LR, Haiter-Neto F, Castelo PM. Relationship between orofacial function, dentofacial morphology, and bite force in young subjects. Oral Dis 2013; 20:567-73. [DOI: 10.1111/odi.12174] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 07/02/2013] [Accepted: 08/04/2013] [Indexed: 11/30/2022]
Affiliation(s)
- MCS Marquezin
- Department of Pediatric Dentistry; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba Brazil
| | - MBD Gavião
- Department of Pediatric Dentistry; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba Brazil
| | - MBCC Alonso
- Department of Radiology Dentistry; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba Brazil
| | - LR Ramirez-Sotelo
- Department of Radiology Dentistry; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba Brazil
| | - F Haiter-Neto
- Department of Radiology Dentistry; Piracicaba Dental School; University of Campinas (UNICAMP); Piracicaba Brazil
| | - PM Castelo
- Department of Biological Sciences; Federal University of São Paulo (UNIFESP); Diadema Brazil
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Polychronis G, Christou P, Mavragani M, Halazonetis DJ. Geometric morphometric 3D shape analysis and covariation of human mandibular and maxillary first molars. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 152:186-96. [PMID: 24009105 DOI: 10.1002/ajpa.22340] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 06/20/2013] [Accepted: 06/20/2013] [Indexed: 12/31/2022]
Abstract
Dental casts of 160 Greek subjects (80 males, 80 females) were scanned by a structured-light scanner. The upper and lower right first molar occlusal surface 3D meshes were processed using geometric morphometric methods. A total of 265 and 274 curve and surface sliding semilandmarks were placed on the upper and lower molar surfaces, respectively. Principal component analysis and partial least square analysis were performed to assess shape parameters. Molars tended to vary between an elongated and a more square form. The first two principal components (PCs), comprising almost 1/3 of molar shape variation, were related to mesiodistal-buccolingual ratios and relative cusp position. Distal cusps displayed the greatest shape variability. Molars of males were larger than those of females (2.8 and 3.2% for upper and lower molars respectively), but no shape dimorphism was observed. Upper and lower molar sizes were significantly correlated (r(2) = 0.689). Allometry was observed for both teeth. Larger lower molars were associated with shorter cusps, expansion of the distal cusp, and constriction of the mesial cusps (predicted variance 3.25%). Upper molars displayed weaker allometry (predicted variance 1.59%). Upper and lower molar shape covariation proved significant (RV = 17.26%, P < 0.0001). The main parameter of molar covariation in partial least square axis 1, contributing to 30% of total covariation, was cusp height, in contrast to the primary variability traits exhibited by PC1 and PC2. The aim of this study was to evaluate shape variation and covariation, including allometry and sexual dimorphism, of maxillary and mandibular first permanent molar occlusal surfaces.
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Affiliation(s)
- Georgios Polychronis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, Athens, 11527, Greece
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Kataoka M, Venn BJ, Williams SM, Te Morenga LA, Heemels IM, Mann JI. Glycaemic responses to glucose and rice in people of Chinese and European ethnicity. Diabet Med 2013. [PMID: 23181689 DOI: 10.1111/dme.12080] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS Diabetes rates are especially high in China. Risk of Type 2 diabetes increases with high intakes of white rice, a staple food of Chinese people. Ethnic differences in postprandial glycaemia have been reported. We compared glycaemic responses to glucose and five rice varieties in people of European and Chinese ethnicity and examined possible determinants of ethnic differences in postprandial glycaemia. METHODS Self-identified Chinese (n = 32) and European (n = 31) healthy volunteers attended on eight occasions for studies following ingestion of glucose and jasmine, basmati, brown, Doongara(®) and parboiled rice. In addition to measuring glycaemic response, we investigated physical activity levels, extent of chewing of rice and salivary α-amylase activity to determine whether these measures explained any differences in postprandial glycaemia. RESULTS Glycaemic response, measured by incremental area under the glucose curve, was over 60% greater for the five rice varieties (P < 0.001) and 39% greater for glucose (P < 0.004) amongst Chinese compared with Europeans. The calculated glycaemic index was approximately 20% greater for rice varieties other than basmati (P = 0.01 to 0.05). Ethnicity [adjusted risk ratio 1.4 (1.2-1.8) P < 0.001] and rice variety were the only important determinants of incremental area under the glucose curve. CONCLUSIONS Glycaemic responses following ingestion of glucose and several rice varieties are appreciably greater in Chinese compared with Europeans, suggesting the need to review recommendations regarding dietary carbohydrate amongst rice-eating populations at high risk of diabetes.
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Affiliation(s)
- M Kataoka
- Department of Human Nutrition, University of Otago, Dunedin, New Zealand
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Barbosa TDS, Tureli MCDM, Nobre-dos-Santos M, Puppin-Rontani RM, Gavião MBD. The relationship between oral conditions, masticatory performance and oral health-related quality of life in children. Arch Oral Biol 2013; 58:1070-7. [PMID: 23453082 DOI: 10.1016/j.archoralbio.2013.01.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2012] [Revised: 01/08/2013] [Accepted: 01/13/2013] [Indexed: 10/27/2022]
Abstract
OBJECTIVE To evaluate the association between oral conditions, masticatory performance (MP) and oral health-related quality of life (OHRQoL) in 8-12 year-old children. DESIGN 150 Brazilian scholars were examined for caries and malocclusions. MP was evaluated based on the ability to comminute an artificial test food followed by the determination of the median particle size (X50) and particle distribution in different-sized sieves ("b"). OHRQoL was measured using the Brazilian versions 8-10 and 11-14 of the child perceptions questionnaire (CPQ), considering the following domains: oral symptoms (OS), functional limitations (FL), emotional well-being (EW) and social well-being (SW). Higher scores indicated worse OHRQoL. Data were submitted to Spearman's correlation test and multiple linear regression analysis. RESULTS There were significant positive correlations between the psychosocial and OS domains scores of the CPQ8-10 and the number of decayed and missing teeth, respectively. The number of decayed teeth positively correlated with the number of missing teeth and the CPQ11-14 scores. The number of decayed and missing teeth was significantly associated with higher CPQ8-10 scores. Higher CPQ11-14 overall scores were associated with female gender, higher FL domain scores were associated with the number of missing teeth, and higher X50 values and EW domain scores were associated with female gender and the number of decayed teeth. CONCLUSIONS A higher number of missing teeth correlated with an inferior MP in older children. Children with a higher number of caries rated their oral health less favourably. Older females and those who broke the test material into smaller sizes were also more likely to report a worse OHRQoL, suggesting that the time allowed to reduce food appears to be a more influential factor on children' perception of oral health than their ability to break down the test material into smaller sizes. Moreover, the subjectivity of functional domain and artificial nature of chewable test material could have influenced the test sensitivity.
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Affiliation(s)
- Taís de Souza Barbosa
- Department of Dentistry for Children, Pediatric Dentistry Area, Piracicaba Dental School, University of Campinas, Piracicaba/SP, Brazil
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Endo T, Komatsuzaki A, Kurokawa H, Tanaka S, Kobayashi Y, Kojima K. A two-colored chewing gum test for assessing masticatory performance: a preliminary study. Odontology 2012; 102:68-75. [PMID: 23076496 DOI: 10.1007/s10266-012-0089-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 10/01/2012] [Indexed: 11/27/2022]
Abstract
This study was conducted to compare subjective and objective assessment methods of a two-colored chewing gum test and to find out whether these methods are capable of discriminating masticatory performances between sexes. 31 adults, 16 males and 15 females participated in this study. Each subject chewed five samples of two-colored chewing gum sticks for 5, 10, 20, 30 and 50 chewing strokes, respectively. The subjective color-mixing and shape indices for the gum bolus (SCMI-B, SSI-B) and the subjective color-mixing index and objective color-mixing ratio for the gum wafer (SCMI-W, OCMR-W) were evaluated by two independent examiners and, on a different day, re-evaluated by one of the examiners. The SCMI-B and SCMI-W assessments had inter- and intra-examiner reliable agreement at 20 or more chewing strokes. The OCMR-W measurement demonstrated high accuracy and low reproducibility between and within the examiners. There were significant gender differences in the distribution of SCMI-W scores (P = 0.044) and in the mean OCMI-W (P = 0.007). The SCMI-B and SCMI-W assessments and the OCMR-W measurement were reliable and valid at the 20 and 30 chewing strokes in this two-colored chewing gum test. The subjective color-mixing index (SCMI-W) and objective color-mixing ratio (OCMR-W) for the chewing gum wafer are capable of discriminating masticatory performance between sexes in this two-colored chewing gum test and that the OCMR-W measurement is discriminating better than the SCMI-W assessment.
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Affiliation(s)
- Toshiya Endo
- Orthodontic Dentistry, The Nippon Dental University Niigata Hospital, 1-8 Hamaura-cho, Chuo-ku, Niigata, 951-8580, Japan,
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Marquezin MCS, Kobayashi FY, Montes ABM, Gavião MBD, Castelo PM. Assessment of masticatory performance, bite force, orthodontic treatment need and orofacial dysfunction in children and adolescents. Arch Oral Biol 2012; 58:286-92. [PMID: 22939374 DOI: 10.1016/j.archoralbio.2012.06.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 06/28/2012] [Indexed: 12/01/2022]
Abstract
OBJECTIVES Few studies have evaluated the relationship between morphological and functional characteristics of the masticatory apparatus in young subjects. Thus, the aim of this study was to evaluate masticatory performance (MP), maximal bite force (BF), orthodontic treatment need and orofacial dysfunction in children and adolescents. DESIGN The sample consisted of 316 subjects of both genders, with an age range 6-16years divided into 4 groups: early mixed, intermediate mixed, late mixed and permanent dentition. MP was evaluated by the individual's ability to comminute a chewable test material in order to determine median particle size (X(50)) and distribution of particles in different sieves ("b"). BF was determined using a digital gnatodynamometer with fork strength of 10mm. Orofacial function and orthodontic treatment need were screened using the Nordic Orofacial Test-Screening (NOT-S) protocol and Index of Orthodontic Treatment Need (IOTN), respectively. The results were submitted to descriptive statistics, normality test, analysis of variance and stepwise multiple linear regression to test relationship between MP and studied independent variables. RESULTS Variance of X(50) and b between groups was statistically significant. But evaluation of variables that significantly contributed to MP variation showed that age, body mass index (BMI), BF and the presence of sleep bruxism were negatively related to X(50) and the NOT-S clinical exam scores showed a positive relationship with X(50). CONCLUSION In the studied sample, age, BMI, BF and the presence of sleep bruxism were related to better MP; but the increase in NOT-S scores was significantly related to poorer MP.
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KOBAYASHI FY, FURLAN NF, BARBOSA TS, CASTELO PM, GAVIÃO MBD. Evaluation of masticatory performance and bite force in children with sleep bruxism. J Oral Rehabil 2012; 39:776-84. [DOI: 10.1111/j.1365-2842.2012.02331.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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A review of the oral health-related evidence that supports the orthodontic treatment need indices. Prog Orthod 2012; 13:314-25. [PMID: 23260543 DOI: 10.1016/j.pio.2012.03.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2011] [Revised: 03/02/2012] [Accepted: 03/06/2012] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND AND OBJECTIVES To date, there is no evidence-based method of quantification for malocclusion. Consequently, how deviant occlusal traits should be scored and weighted relative to one another is a matter of serious debate. Orthodontic Treatment Need Indices (OTNI) use the subjective opinion of the experts, as their foundation, to define the pathological boundaries (cut-offs) of occlusal traits. This paper reviews the evidence relating malocclusions or deviated occlusal traits to oral health problems, and investigates if this evidence supports the cut-off points and the rationale used for OTNI. MATERIALS AND METHODS The relevant cited studies and reviews from the MEDLINE, Web of Science, Scopus, Cochrane databases, and scientific textbooks were used. The citation rate was confirmed by using the Google Scholar. RESULTS So far, the evidence for harmful effects of deviated occlusal traits on oral health is either lacking or exists as cross-sectional (mostly) and longitudinal (a few and primarily short-term) studies. When an association was reported between a deviated occlusal trait and an oral health problem, either the strength of that association was weak, or due to methodological issues, findings were not conclusive. Consequently, establishing a cause and effect relationship is difficult. Further, commonly used OTNI do not record a full spectrum of occlusal traits, and relating their ranking or scoring systems to the available evidence is difficult. Therefore, there is little evidence to suggest that individuals with a high need (high score), as measured by OTNI, will necessarily put at risk their oral health if they turn down orthodontic therapy. CONCLUSION OTNI have a role in the epidemiology and can be used for resource planning, but their predictive value to detect the future objective functional deficits or oral health problems is questionable. OTNI will need revalidation over time with emerging research findings.
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Oliveira RLBD, Noronha WP, Bonjardim LR. Avaliação da performance mastigatória em indivíduos respiradores nasais e orais. REVISTA CEFAC 2011. [DOI: 10.1590/s1516-18462011005000112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJETIVO: avaliar, por meio da mastigação sequencial de uma "pastilha" artificial de Optosil, o desempenho mastigatório de indivíduos respiradores nasais e orais. MÉTODO: participaram sessenta sujeitos dentados na faixa etária de 14 a 22 anos. Uma "pastilha" de Optosil foi fornecida a cada participante, que executou 20 ciclos mastigatórios, os fragmentos foram colocados numa coluna de sete peneiras, sendo, posteriormente pesados numa balança de precisão. Os dados obtidos foram submetidos à análise descritiva e inferencial (Teste T e ANOVA). RESULTADOS: os grupos respiradores nasais e respiradores orais foram constituídos de 30 jovens cada, com idade média de 17,87 e 17,83 anos respectivamente. Com relação ao gênero houve predominância do gênero feminino no grupo respirador oral e do gênero masculino no grupo respirador nasal Os cinco diagnósticos mais prevalentes no grupo respirador oral foram hipertrofia de adenóide, rinite alérgica, sinusite, asma e hipertrofia de amígdala. Por fim, ao ser realizado o Teste T, não foi encontrada diferença estatística na performance mastigatória nos respiradores orais e nasais (p>0,05). CONCLUSÃO: o padrão respiratório não foi um fator determinante na performance mastigatória.
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Yashiro K, Takagi M, Takada K. Smoothness of chewing jaw movements in adults with mandibular prognathism. J Oral Rehabil 2011; 39:100-10. [PMID: 21923891 DOI: 10.1111/j.1365-2842.2011.02256.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K Yashiro
- Department of Orthodontics and Dentofacial Orthopedics, Graduate School of Dentistry and Center for Advanced Medical Engineering and Informatics, Osaka University, Osaka, Japan
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Mixed longitudinal evaluation of masticatory performance in children 6 to 17 years of age. Am J Orthod Dentofacial Orthop 2011; 139:e427-34. [DOI: 10.1016/j.ajodo.2009.08.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2008] [Revised: 07/01/2009] [Accepted: 08/01/2009] [Indexed: 11/18/2022]
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