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  • 2000-2004  (13)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Psychological distress in chronic craniomandibular and cervical spinal pain patients (2002)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 29 (2002), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In chronic craniomandibular disorders, a relationship with psychological distress has often been investigated, with contradictory results. Recent studies on chronic pain patients have shown that the level of psychological distress is related to the number of painful body areas. Therefore, the aim of this study was to analyse differences in psychological distress between craniomandibular pain patients with or without cervical spinal pain, taking the number of painful body areas below the cervical spine also into account. Based on an oral history and, independently performed, dynamic/static tests, the presence or absence of a painful CMD or CSD was recognized. To assess the level of psychological distress, the Dutch version of the Symptom Checklist 90 (SCL-90) was used. The number of painful body areas was indicated on the body drawing of the McGill Pain Questionnaire (MPQ-DLV).From the initial 250 participants, 103 persons could unequivocally be classified as having or not having a painful CMD and/or CSD and fully completed both questionnaires. Patients with both craniomandibular and cervical spinal pain showed higher levels of psychological distress than patients with only local craniomandibular pain and persons without pain (ancova and t-tests, P=0·026–0·000). Further, persons with more painful body areas below the cervical spine showed higher SCL-90 scores (ancova and t-tests, P=0·045–0·000). In conclusion, chronic craniomandibular pain patients with a coexistent cervical spinal pain show more psychological distress than patients with only local craniomandibular pain and asymptomatic persons. (Supported by the IOT)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2002.01026_9.x
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  • 2
    Electronic Resource
    Electronic Resource
    Measurement of condylar motion: a plea for the use of the condylar kinematic centre (2003)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 30 (2003), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: summary  In this study, a plea is given for the use of the kinematic centre in studies of the kinematics of the human temporomandibular condyle. The concept of the kinematic centre is based upon the assumption that the movements of the condyle–disc complex within the temporomandibular joint can reasonably well be described by those of a ball-shaped condyle–disc complex. The kinematic centre is then the centre of the sphere. Its movement traces have the advantage that they are smooth and have a good reproducibility between consecutive movements. Moreover, the open and close traces are just a few tenths of a millimetre apart and show no crossings. This makes the kinematic centre a suitable choice in order to avoid false-positive diagnoses in the study of internal derangements by means of condylar movement recordings. However, the kinematic centre has the disadvantage that the mandibular movements have to be recorded by rather complicated six degrees of freedom recording equipment and that the exploration algorithm for its location may sometimes have difficulties in finding the right location.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2003.01066.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Is self-reported jaw pain on mouth opening associated with a reduced bruxism time index? (2002)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 29 (2002), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Sleep-related bruxism (SB) is a frequently encountered problem in the dental office, for which evidence-based causal therapy possibilities are not yet available. We are currently performing a large-scale double-blind placebo-controlled randomized clinical trial to evaluate several management strategies for SB. So far, we have measured 35 participants, all of them clinically diagnosed bruxers (11 men; 24 women; mean age=39·2 ± 11·4 years). A first (baseline) night in the sleep laboratory confirmed their clinical diagnosis, i.e. all had more than four bruxism episodes per hour of sleep; (〉 4 EpiH). The baseline recordings were preliminarily analysed to establish a cut-off criterion for a polysomnographical SB diagnosis that, in addition to the previously established criterion (i.e. 〉 4 EpiH), also respects the time spent bruxing. We therefore calculated an index that expresses this aspect as a percentage of the total sleep time: the bruxism time index (BTI). The BTI was highly correlated with the number of EpiH (Pearson's correlation coefficient=0·92; P=0·000). Linear regression analysis revealed that a BTI of 〉 0·4% corresponds with the 〉 4 EpiH criterion (F-value for the significance of the overall model=146·2; P=0·000). Future analyses may yield an additional intensity (power) cut-off criterion as well. As the relationship between SB and jaw pain is still unclear, we also determined, in 28 of the 35 participants, the influence of self-reported (VAS) jaw pain during mouth opening before and after the first night on the BTI. BTIs in bruxers whose evening and/or morning VASs ≥ 10 mm (n=10) tended to be lower than those in bruxers whose VASs were less than 10 mm (n=18) (1·4 ± 1·0 and 2·7 ± 2·5%, respectively; Two sample t-test; T=1·98; P=0·059). This finding confirms previous suggestions in the literature that jaw pain might be associated with a reduced bruxism activity. This can be understood as a protective mechanism that prevents (further) overloading of the masticatory system. (Supported by the IOT.)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2002.01026_4.x
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  • 4
    Electronic Resource
    Electronic Resource
    Oral kinesiology. A new postgraduate programme in the Netherlands (2004)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 31 (2004), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary  As one of the dental differentiations in The Netherlands, temporomandibular disorders (TMD) focuses on the diagnosis and treatment of pain and dysfunction of the masticatory system. Bruxism (i.e. tooth clenching and/or grinding) is thought to play an important aetiological role in TMD. Among others, bruxism may result in TMD pain and dental attrition. The close relationship between TMD, bruxism, and attrition necessitates an integrated approach to these clinical problems. This could be achieved through the multidisciplinary differentiation ‘oral kinesiology’, that covers not only the diagnosis and treatment of TMD and bruxism but also the restoration of worn dentitions. This article focuses on the background of oral kinesiology, as well as on the rationale to develop a curriculum for the postgraduate training of dentist–kinesiologists in the Netherlands. Further, the oral kinesiology curriculum of the Academic Centre for Dentistry Amsterdam will be introduced. This curriculum will ensure that specialized professionals, who are able to approach the different aspects of oral kinesiology in an integrated manner, are available not only for general dental practice but also for centres for special dental care and university departments. This will lead to improved care for patients, whose management is until now dispersed between various dental specialists.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.0305-182X.2003.01244.x
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  • 5
    Electronic Resource
    Electronic Resource
    Bruxism is mainly regulated centrally, not peripherally (2001)
    Oxford UK : Blackwell Science Ltd
    Journal of oral rehabilitation 28 (2001), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Bruxism is a controversial phenomenon. Both its definition and the diagnostic procedure contribute to the fact that the literature about the aetiology of this disorder is difficult to interpret. There is, however, consensus about the multifactorial nature of the aetiology. Besides peripheral (morphological) factors, central (pathophysiological and psychological) factors can be distinguished. In the past, morphological factors, like occlusal discrepancies and the anatomy of the bony structures of the orofacial region, have been considered the main causative factors for bruxism. Nowadays, these factors play only a small role, if any. Recent focus is more on the pathophysiological factors. For example, bruxism has been suggested to be part of a sleep arousal response. In addition, bruxism appears to be modulated by various neurotransmitters in the central nervous system. More specifically, disturbances in the central dopaminergic system have been linked to bruxism. Further, factors like smoking, alcohol, drugs, diseases and trauma may be involved in the bruxism aetiology. Psychological factors like stress and personality are frequently mentioned in relation to bruxism as well. However, research to these factors comes to equivocal results and needs further attention. Taken all evidence together, bruxism appears to be mainly regulated centrally, not peripherally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2001.00839.x
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  • 6
    Electronic Resource
    Electronic Resource
    Recognition of internal derangements (2004)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 31 (2004), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: summary  One of the most common symptoms of temporomandibular disorders is an internal derangement (ID). The aim of this study was to test the inter-observer reliability of the recognition of IDs by means of auscultation, palpation or both. To that end, 120 women and 100 men were screened by two trained examiners for the presence of IDs. Anterior disc displacement was diagnosed in 14% of the cases and hypermobility in 12%. In 4% of the cases, the ID was classified as ‘other’. The inter-rater reliability (Cohen's kappa) was moderate for the presence of an ID for all techniques, while for the classification into type, an almost perfect reliability was found for the combined technique. It was concluded that the type of ID can best be established with the combination of auscultation and palpation; for the establishment of an ID as such, any of the three techniques would suffice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.2004.01317.x
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  • 7
    Electronic Resource
    Electronic Resource
    A reliability study of clinical occlusal tooth wear measurements (2002)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 29 (2002), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Tooth wear represents a clinical problem that is becoming increasingly important in ageing populations. Attrition caused by bruxism is its most visible sign. To determine the optimal moment to start the restoration of the worn dentition, one should first be able to measure the amount of tooth wear reliably in the clinical setting. So far, most studies of tooth wear severity have been performed on dental study casts. However, such an indirect approach is less applicable to the everyday dental practice, the more so because by grading of casts, the identification of dentine exposure is hard or even impossible to achieve. In this study, occlusal tooth wear was assessed clinically in 45 volunteers (17 men; 28 women; mean age 33·7 ± 10·7 years), TMD patients and symptom-free persons alike, on four occasions: two calibrated examiners graded the occlusal wear at two different points in time, using a 5-point scale (0=no wear; 1=visible wear within the enamel; 2=visible wear with dentine exposure and loss of clinical crown height 〈1/3; 3=loss of crown height between 1/3 and 2/3; 4=loss of crown height 〉2/3). The overall values of the intra-rater and interrater reliability, expressed as Cohen's κ, were substantial (κ=0·632–0·678) and did not differ significantly from one another (repeated measures anova: F3,19=1·428, P=0·266). The clinical variable ‘quadrant’ (e.g. right maxillary dental arch) did not influence the values of κ whereas the interrater reliability during the first session was better for the element types ‘incisors’ and ‘cuspids’ than for the element type ‘premolars’ (one-way anova: F3,23=4·577, P=0·012; post hoc Bonferroni tests: P=0·030 and 0·036). Qualitative assessment of the clinical variable ‘severity of wear’ indicated that the more advanced the tooth wear is, the more reliably it can be graded. The presence of restorations did not influence the reliability. It was concluded that occlusal tooth wear can be assessed reliably in the clinical setting, especially in the anterior parts of a dentition that demonstrates considerable wear. (Supported by the lOT)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2002.01026_26.x
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  • 8
    Electronic Resource
    Electronic Resource
    Local kinematic and anthropometric factors related to the maximum mouth opening in healthy individuals (2002)
    Oxford UK : Blackwell Science Ltd
    Journal of oral rehabilitation 29 (2002), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The aim of the present study was to investigate the influence of local anthropometric (mandibular length and width) and kinematic (forward and downward condylar translation and angle of rotation) variables upon the maximum mouth opening (MMO). Thirty-five healthy individuals, 17 men and 18 women, mean age 23 years with a range from 18 to 31 years, performed six to eight maximal, symmetrical and pain-free open-close movements during a 20-s recording. Mandibular movements were recorded by means of the OKAS-3D jaw movement recording system. A stepwise regression analysis showed that differences in MMO are mainly explained by differences in the angle of rotation and in mandibular length (R2adj=91·5%). Including the downward and forward component of condylar translation into the regression model increased the explained variance with only 4·7%. A second stepwise analysis showed that the angle of rotation is positively related to the forward component of the condylar translation and negatively related to its downward component (R2adj=52·7%). In conclusion, differences in MMO between healthy individuals are, to a large extent, explained by differences in the angle of rotation and in mandibular length. In its turn, differences in the angle of rotation are related to differences in condylar translation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2002.00895.x
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  • 9
    Electronic Resource
    Electronic Resource
    Is there a relationship between head posture and craniomandibular pain? (2002)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 29 (2002), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: SUMMARY  An often-suggested factor in the aetiology of craniomandibular disorders (CMD) is an anteroposition of the head. However, the results of clinical studies to the relationship between CMD and head posture are contradictory. Therefore, the first aim of this study was to determine differences in head posture between well-defined CMD pain patients with or without a painful cervical spine disorder and healthy controls. The second aim was to determine differences in head posture between myogenous and arthrogenous CMD pain patients and controls. Two hundred and fifty persons entered the study. From each person, a standardized oral history was taken and blind physical examinations of the masticatory system and of the neck were performed. The participants were only included into one of the subgroups when the presence or absence of their symptoms was confirmed by the results of the physical examination. Head posture was quantified using lateral photographs and a lateral radiograph of the head and the cervical spine. After correction for age and gender effects, no difference in head posture was found between any of the patient and non-patient groups (P 〉 0·27). Therefore, this study does not support the suggestion that painful craniomandibular disorders, with or without a painful cervical spine disorder, are related to head posture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2842.2002.00998.x
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  • 10
    Electronic Resource
    Electronic Resource
    Functional subdivision of the human masseter and temporalis muscles as shown by the condylar movement response to electrical muscle stimulation (2000)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 27 (2000), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In previous studies from our laboratory, a functional subdivision of the human temporalis and masseter muscles was demonstrated by means of opto-electronic recordings of the lower incisal point movement responses to electrical muscle stimulation. In the present study, it was examined whether this subdivision was also reflected in different movement responses of the mandibular condyle. To that end, the condylar movement responses to unilateral stimulation of four masseter muscle parts and three temporalis muscle parts were studied in four different jaw positions. The kinematic centre was used for condylar reference point. For both the amplitude and the direction of the movement responses, the effects of stimulation location and jaw position were studied using multivariate anova and contrast analyses. It was found that for both outcome variables, the functional subdivision of the masseter and temporalis muscles was also reflected in some, but not all, of the movement responses of the mandibular condyles. The deep masseter muscle part and the (anterior) temporalis muscle part responded similarly to electrical stimulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.2000.00615.x
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