The Dutch version of the Oral Health Impact Profile (OHIP-NL): Translation, reliability and construct validity

Background The purpose of this study was to make a cross-culturally adapted, Dutch version of the Oral Health Impact Profile (OHIP), a 49-item questionnaire measuring oral health-related quality of life, and to examine its psychometric properties. Methods The original English version of the OHIP was translated into the Dutch language, following the guidelines for cross-cultural adaptation of health-related quality of life measures. The resulting OHIP-NL's psychometric properties were examined in a sample of 119 patients (68.9 % women; mean age = 57.1 ± 12.2 yrs). They were referred to the clinic of Prosthodontics and Implantology with complaints concerning their partial or full dentures or other problems with missing teeth. To establish the reliability of the OHIP-NL, internal consistency and test-retest reliability (N = 41; 1 - 2 weeks interval) were examined, using Cronbach's alpha and intraclass correlation coefficients (ICC), respectively. Further, construct validity was established by calculating ANOVA. Results Internal consistency and test-retest reliability were excellent (Cronbach's alpha = 0.82 - 0.97; ICC = 0.78 - 0.90). In addition, all associations were significant and in the expected direction. Conclusion In conclusion: the OHIP-NL can be considered a reliable and valid instrument to measure oral health-related quality of life

The response of chelonian muscle spindles to mechanical stimulation

Single unit recordings have been made from the muscle spindles of the extensor digitorum brevis I muscle of the chelonian emys orbicularis. The responses to ramp-type mechanical stretches (up to 5 mm s−1 velocity and up to 1.6 mm extension) were compared to those of spindles from other groups. It is found that the spindles have lower rates of firing than those from the other groups with the exception of the snake spindles. Generally the spindles behaved like the secondary ending of mammalian spindles or the tonic type of snake spindle in terms of their response to the velocity of stretch. The results are consistent with the view that the tonic response arises from intrafusal muscle fibres in which the sensory region has a structure which is fairly uniform and similar to that of the polar regions and not interrupted by accumulations of nuclei

The Dutch version of the Oral Health Impact Profile (OHIP-NL): Translation, reliability and construct validity

Abstract Background The purpose of this study was to make a cross-culturally adapted, Dutch version of the Oral Health Impact Profile (OHIP), a 49-item questionnaire measuring oral health-related quality of life, and to examine its psychometric properties. Methods The original English version of the OHIP was translated into the Dutch language, following the guidelines for cross-cultural adaptation of health-related quality of life measures. The resulting OHIP-NL's psychometric properties were examined in a sample of 119 patients (68.9 % women; mean age = 57.1 ± 12.2 yrs). They were referred to the clinic of Prosthodontics and Implantology with complaints concerning their partial or full dentures or other problems with missing teeth. To establish the reliability of the OHIP-NL, internal consistency and test-retest reliability (N = 41; 1 – 2 weeks interval) were examined, using Cronbach's alpha and intraclass correlation coefficients (ICC), respectively. Further, construct validity was established by calculating ANOVA. Results Internal consistency and test-retest reliability were excellent (Cronbach's alpha = 0.82 – 0.97; ICC = 0.78 – 0.90). In addition, all associations were significant and in the expected direction. Conclusion In conclusion: the OHIP-NL can be considered a reliable and valid instrument to measure oral health-related quality of life.</p

Is Myofascial Pain in Temporomandibular Disorder Patients a Manifestation of Delayed-onset Muscle Soreness?

WOS: 000330536800008PubMed ID: 23343773Objective: In a study to the possible role of overuse of the jaw muscles in the pathogenesis of jaw muscle pain, we used a protocol involving concentric and eccentric muscle contractions to provoke a state of delayed-onset muscle soreness (DOMS) in the jaw muscles of healthy individuals. We tested whether the accompanying signs and symptoms would yield the temporary diagnosis of myofascial pain according to the research diagnostic criteria for temporomandibular disorders (RDC/TMD) in these individuals. Methods: Forty persons (mean age +/- SD = 27.7 +/- 7.5 y) performed six, 5-minute bouts of eccentric and concentric jaw muscle contractions. Before and immediately after the exercise, and 24 hours, 48 hours, and 1 week later, self-reported muscle fatigue and pain, pain-free maximum mouth opening, pressure-pain thresholds, and the number of painful jaw muscle palpation sites were recorded. Results: Significant signs and symptoms of DOMS in the jaw muscles were found, which all had resolved after 1 week. In 31 (77.5%) of the participants, these signs and symptoms also gave rise to a temporary diagnosis of myofascial pain according to the RDC/TMD. Conclusions: The results of this study demonstrate that an experimental protocol involving concentric and eccentric muscle contractions can provoke DOMS in the jaw muscles and the temporary diagnosis of myofascial pain according to the RDC/TMD. The results observed strengthen the supposition that the myofascial pain in TMD patients may be a manifestation of DOMS in the jaw muscles.European Union Marie Curie Chair Project (GenderReflex) [MEX-CT-2006-040317]; Turkish Scientific and Technical Research Organization, Ankara, Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [107S029-SBAG-3556]Supported by the European Union Marie Curie Chair Project (GenderReflex; MEX-CT-2006-040317) and Turkish Scientific and Technical Research Organization, Ankara, Turkey (TUBITAK; 107S029-SBAG-3556). The authors declare no conflict of interest

Reproducible effects of subjectively assessed muscle fatigue on an inhibitory jaw reflex in humans

Objective To evaluate the effects of exercise-induced, subjectively assessed muscle fatigue on an inhibitory jaw reflex, evoked by electrical stimulation of the upper lip. In addition, the reproducibility of these effects was assessed. Design Eight subjects participated in two experimental sessions that were two weeks apart. During each session, a baseline recording, a post-conditioning recording, and two recovery recordings were obtained. The post-conditioning recording was obtained immediately after provocation of jaw muscle fatigue by intense chewing. The endpoint of provocation was reached 30 s after a subject had crossed the value ‘6’ on a 10 cm long visual analogue scale. Results Subjectively assessed jaw muscle fatigue caused a decrease of about 50% in the size of the late inhibition in the post-conditioning recording (ANOVA: p = 0.001; Bonferroni contrasts: p < 0.05). Full recovery to baseline values was already achieved at the first recovery recording. No significant differences were found between both sessions (ANOVA, p = 0.677)

Accuracy of RDC/TMD examination and dynamic/static tests

Objectives: To study the diagnostic accuracy of the clinical examination of the Research Diagnostic Criteria (RDC) and of the dynamic and static pain tests for the recognition of temporomandibular disorder (TMD) pain and to improve the RDC accuracy by 1) changing the myofascial pain cutoff of 3 painful muscle palpation sites, or 2)omitting unreliable palpation sites. Methods: In 4 European dental faculties, a blind examination was performed in 125 chronic TMD pain patients, 88 chronic dental pain patients, and 121 pain-free subjects. Allocation was based upon the results of an oral history and a dental examination. Results: Sensitivity and specificity of the RDC were .88 and 45-.71, respectively. Increasing the myofascial pain cutoff better met the recommended levels for specificity and sensitivity of .70 and .90, respectively. When unreliable muscle palpation sites (i.e., the intraoral and submandibular sites) were omitted, the accuracy of the RDC/TMD examination did not change. For the dynamic and static pain tests, sensitivity (.65) and specificity (.84-.91) did not differ significantly from the recommended levels. Conclusion: A suspected TMD origin of orofacial pain is best confirmed by pain on the dynamic or static tests, while it is better denied by a negative outcome of the RDC examination. The intraoral and submandibular palpation sites of the RDC examination do not contribute to its diagnostic accuracy and can better be omitted, while the cutoff for a myofascial pain diagnosis should be increased