Differences between centric relation and maximum intercuspation as possible cause for development of temporomandibular disorder analyzed with T-scan III

Lila-Krasniqi, Zana; Shala, Kujtim; Pustina-Krasniqi, Teuta; Bicaj, Teuta; Dula, Linda; Guguvcevski, Ljuben

doi:10.4103/1305-7456.172627

Cited by 17 publications

(18 citation statements)

References 41 publications

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“…Some suggested CO/CR discrepancy could lead to TMJ arthralgia, myalgia, disc displacement, and even TMJ OA [36][37][38][39] . And others have contended that an association between CO/CR discrepancy and TMD could not be established [40][41][42][43][44] . Though CO/CR discrepancy appears to be a statistically significant factor that influences the prognosis of TMJ OA, this does not directly support a cause-and-effect relationship between CO/CR discrepancy and TMJ OA.…”

Section: Discussionmentioning

confidence: 99%

Long-term Changes of Temporomandibular Joint Osteoarthritis on Computed Tomography

Song

Lee²,

Huh

et al. 2020

Sci Rep

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this study aimed to understand long-term changes of the osteoarthritic temporomandibular joint (tMJ) condyle using computed tomography (ct) and to verify its correlation with clinical characteristics of temporomandibular disorders. Eighty-nine patients (152 joints; 76 female, 13 male) who had taken follow-up CTs (mean follow-up period: 644.58 ± 325.71 days) at least once in addition to their initial evaluation were selected. cross-sectional demographic and clinical data and longitudinal ct images were collected. Data were analyzed by analysis of variance and logistic regression. overall destructive change index (number of tMJ condyle sections in which destructive change was observed) decreased from 1.56 to 0.66. Improvement was seen in 93 joints (61.2%) and 27 joints (17.8%) worsened. In the pain positive group, both initial and final destructive change index were significantly higher compared to the pain negative group (p = 0.04). Occlusal stabilization splint therapy and nonsteroidal antiinflammatory drug administration showed a significant effect on improving the prognosis of TMJ osteoarthritis (p = 0.015 and 0.011). In conclusion, TMJ osteoarthritis showed long-term improvement in the majority of cases. tMJ osteoarthritis accompanied by pain showed unfavorable prognosis with additional bone destruction. Occlusal stabilization splint and nonsteroidal anti-inflammatory drug administration were beneficial on the prognosis of TMJ osteoarthritis. Osteoarthritis (OA) is a debilitating degenerative disorder involving inflammatory conditions and osseous changes of the joints 1,2. Tissue damage caused by mechanical irritation may lead to the infiltration of inflammatory mediators originating from the synovium into the cartilage, eventually causing defects in cartilage metabolism. Catabolic processes overpower the anabolic capacity of chondrocytes with continued degeneration, tipping the homeostatic balance resulting in progressive cartilage destruction 1,3,4. Signs and symptoms of temporomandibular joint (TMJ) OA include pain, movement limitations, clicking and crepitus sounds, and most critically joint deformity that can be identified through radiographic imaging. Osseous changes of TMJ OA manifest as flattening, osteophyte formation, sclerosis, erosion, joint mice, and subchondral bone cysts. Destruction of the TMJ condyle can cause malocclusion and skeletal facial deformity, mainly retrognathism accompanied by anterior open bite and facial asymmetry. The TMJ condyle is a small bone that is surrounded by various adjacent structures that make visualizing detailed bony status difficult with plain radiography. Computed tomography (CT) images provide an advantageous view of osseous changes by allowing visualization of the bony structure in multiple dimensions with superior reliability and accuracy compared to panoramic radiographs and conventional tomography 5,6. The disagreement between the severity of clinical symptoms and radiographic evidence is well described in several previous studies of TMJ OA based on CT result...

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Section: Discussionmentioning

confidence: 99%

Long-term Changes of Temporomandibular Joint Osteoarthritis on Computed Tomography

Song

Lee²,

Huh

et al. 2020

Sci Rep

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“…In this study, the same HD sensor was used multiple times but less than 20 closures/subject as reported by Kerstein et al 19 that consistency of the data from the HD sensor was not affected by up to 20 repeated closures. Although several investigators supported the efficacy and reliability of T-Scan III, 7 19 20 21 the thickness of HD sensor (100 microns), which is ~4 to 12 times higher than physiologic vertical tooth movement ( ca. 8–28 microns) in clinically healthy tooth, 22 may interfere the patient biting into the same MIP.…”

Section: Discussionmentioning

confidence: 99%

Correlation of Bite Force Interpretation in Maximal Intercuspal Position among Patient, Clinician, and T-Scan III System

et al. 2019

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Objective The main purpose of this article was to determine the correlation of bite force in maximal intercuspal position (MIP) among patient’s perceptions, clinician subjective interpretation, and T-Scan III system. Materials and Methods Forty-three dental students at Naresuan University (Phitsanulok, Thailand) participated in the study. Subjects were positioned by Frankfurt horizontal plane paralleled to the horizontal plane and asked to bilaterally clenched in MIP. Patient’s perception was evaluated by asking which side of the jaw had heavier bite force (right, left, or equally on both sides). Then, the clinician subjective interpretation was assessed using traditional occlusal indicators. Furthermore, patient’s bite force was analyzed using T-Scan III. Statistical Analysis Cohen’s weighted kappa test was used to evaluate the correlation of bite force. Results The best correlation between patient’s perception and T-Scan III was at the ± 7.5% cutoff range with 15 subject agreements. While the best correlation between clinician subjective interpretation and T-Scan III was at ± 5.0% cutoff range with 23 subject agreements. Cohen’s weighted kappa indicated slight agreement between T-Scan III and patient’s perception and fair agreement between T-Scan III and clinician. Conclusions Clinician subjective interpretation is more clinically reliable than patient’s perception when T-Scan III is used as a gold standard.

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“…11 In addition, a unilaterally overloaded occlusal force was seen in TMD patients wearing fixed dentures with disharmonious interarch relationship. 12 Aside from the occlusal force distribution, dynamic parameters interested by researchers investigating masticatory system function include the occlusion time (OT), defined as the time from the initiation of tooth contact (at selfclosure into the subject's habitual intercuspation) to static intercuspation preceding and registering less force than reached in the MIP, 13 first tooth contact during mastication, and the time to generate total force (from 1 to 100%).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Occlusal Parameters between Open Bite and Nonopen Bite Patients Using the T-Scan III System: A Pilot Study

2022

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Objective To evaluate and compare the first tooth contact region, occlusion time, time to generate total force, and force distribution between open bite (OB) and non-OB (NOB) patients at the maximum intercuspation position using the T-Scan III system. Materials and Methods Sixteen patients were divided into the OB and NOB groups (n = 8 for each group). The T-Scan III system was used to evaluate the first tooth contact region, occlusion time, time to generate total force, and force distribution. Statistical Analysis The mean patient age, overjet, overbite, occlusion time, and time to generate total force were compared between the groups by independent samples t-test. Relative force distributions between groups and among regions were compared by the Mann–Whitney U- and Kruskal–Wallis H-tests, respectively. A probability value of less than 5% (p < 0.05) was considered significant. Results Differences in the first tooth contact region between groups were observed. The molar region was the first tooth contact region in the OB group, while first tooth contact was observed in all regions in the NOB group. Neither the occlusion time nor the time to generate total force was significantly different between the groups (p > 0.05). The highest force distributions were observed in the molar regions in both groups. Significant intragroup differences were found among all regions (p < 0.05), except between the anterior and premolar regions in the NOB group (p = 0.317). Intergroup differences in the force distributions in the anterior (p = 0.000), premolar (p = 0.038), and molar (p = 0.007) regions were significant. Conclusion Unlike in the NOB group, in which first tooth contact occurred in every region, in the OB group, first tooth contact occurred only in the molar region. Compared with those in the NOB group, the force distributions in the OB group were approximately 1.5 times higher in the molar region but were significantly lower in the anterior and premolar regions.

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Differences between centric relation and maximum intercuspation as possible cause for development of temporomandibular disorder analyzed with T-scan III

Cited by 17 publications

References 41 publications

Long-term Changes of Temporomandibular Joint Osteoarthritis on Computed Tomography

Long-term Changes of Temporomandibular Joint Osteoarthritis on Computed Tomography

Correlation of Bite Force Interpretation in Maximal Intercuspal Position among Patient, Clinician, and T-Scan III System

Comparison of Occlusal Parameters between Open Bite and Nonopen Bite Patients Using the T-Scan III System: A Pilot Study

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