Influence of different condylar and incisal guidance ratios to the activity of anterior and posterior temporal muscle

Čelebić, Asjâ; Alajbeg, Iva; Kraljević-Šimunković, Sonja; Valentić-Peruzović, Melita

doi:10.1016/j.archoralbio.2006.08.005

Cited by 8 publications

(10 citation statements)

References 30 publications

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“…Moreover, in the mandible, the insertion of the pterygomandibular fold is actually at the posterior end of the retromolar pad, and the extension of the temporal muscle tendon almost encircles the retromolar pad. Therefore, owing to temporal muscle activity and mouth opening, the lateral region of the mandible is submitted to the tensile forces, which is supposed to prevent extensive bone reduction [40][41][42][43] . However, the results of this study also confirmed that the RRR was more pronounced in those patients who had been edentulous for <10 years than in patients who had been edentulous for more than 10 years, both in frontal and in lateral alveolar ridge regions.…”

Section: Discussionmentioning

confidence: 99%

Residual ridge atrophy in complete denture wearers and relationship with densitometric values of a cervical spine: a hierarchical regression analysis

2011

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Residual ridge atrophy in complete denture wearers and relationship with densitometric values of a cervical spine: a hierarchical regression analysis Background: The rate of residual ridge atrophy (RRR) and its association with mineral density of other bones have not yet been fully explained. Objective: To measure RRR over a 5-year period in complete denture wearers and relate it to the density of a cervical spine (CSBD). Materials and methods: Sixty-two patients (different gender, age, body mass index, duration of edentulousness (DE) and different denture-wearing habits) participated. A copper stepwedge was attached to the cassette, and 50 lateral radiograms met the criteria to be included. Results: A significant decrease in vertical height was observed in all measured sites. The amount of RRR was highest in frontal areas of both jaws and decreased gradually towards lateral regions. Hierarchical regression analysis revealed that the amount of RRR in the maxillary frontal area could be explained up to 48.4% by the variable DE and only up to 6.1% by the CSBD, while gender had almost no influence (1%). Similar results were obtained for the lateral maxillary RRR (33.9%; 7%; 2%), frontal mandibular RRR (40; 8.4; 0.4%) and lateral mandibular RRR (31.5%; 3.4%; 7.7%). Conclusion: Skeletal bone density, reflecting systemic and hereditary factors, is weakly related to RRR (3.4-8.4%).

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Section: Discussionmentioning

confidence: 99%

Residual ridge atrophy in complete denture wearers and relationship with densitometric values of a cervical spine: a hierarchical regression analysis

2011

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“…Many scholars have reported that IG influences condylar guidance, which in turn modifies TMJ morphology [5,8]. Different condylar and incisal guidance ratios have been found to affect the activity of anterior and posterior temporal muscles [9]. Schuyler et al [10] suggested that during growth and development, incisal guidance may influence the contour of the articular fossa and the movement pattern of the condyle.…”

Section: Introductionmentioning

confidence: 99%

The relation between incisal guidance angle and the growth and development of temporomandibular joint: a multi-cross-sectional retrospective study

Zhou

et al. 2021

BMC Oral Health

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Background The incisal guidance angle (IGA) is related to temporomandibular joint (TMJ), and changes to the IGA are often involved in the prosthetic and orthodontic treatment of anterior teeth. However, the influence of incisal guidance on the growth, development and remodelling of the TMJ is not yet clear. The aim of this study was to investigate age-related morphological differences in the TMJ in subjects with different IGAs. Methods Cone-beam computed tomography (CBCT) images of 274 patients were included (group 1, IGA < 45°; group 2, 45° ≤ IGA ≤ 60°; group 3, IGA > 60°). Each group was then divided into 4 age groups (group a, 6–12 years; group b, 13–16 years; group c, 17–25 years; group d, 26–33 years). TMJ morphology was assessed by linear measurements, angular measurements, and subjective evaluations. The IGA and occlusal plane angle were also measured. Results Anterior inclination of condyle (AIC) increased with age in the three IGA groups but decreased from 17 years onward in group 2 (P < 0.05). In the age groups analysis, the AIC in group 1 was smaller than that in group 3 but larger than that in group 2 (P > 0.05). Articular eminence inclination (AEI) decreased with age in group 1 (P = 0.027) but increased with age in group 3 (P = 0.053). The AEI in group 2 was larger than that in group 1 at 17–25 years (P = 0.046), and it was larger in group 3 than in group 1 at 26–33 years (P = 0.047). The IGA had a weak correlation with AEI (P < 0.05). Conclusion The articular fossa of patients with shallower incisal guidance changed to a flatter shape with age, whereas the condylar anterior slope and articular eminence of patients with steeper incisal guidance changed towards a steeper alignment. There was a correlation between IGA and TMJ shape.

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“…Therefore, in this study all subjects had to perform OCC tasks with 60% of their maximal ICP activity. However, maximal myoelectric activity in ICP is significantly higher in DIs than in CDWs (Alajbeg et al, 2005(Alajbeg et al, , 2006Castroflorio et al, 2006;Celebic et al, , 2007, but individual variation cannot be avoided in any EMG measurement. The clenching levels (Alajbeg et al, 2005;Bernstein et al, 1981;Bonte and van Steenberghe, 1991;Celebic et al, 2007;Fung et al, 1982;van Steenberghe, 1979;Karkazis and Kossioni, 1999;Kossioni and Karkazis, 1995bDe Laat et al, 1985;van Steenberghe and Jacobs, 2006) have always been expressed as percentages of the maximum muscle activity in ICP.…”

Section: Right Temporalismentioning

confidence: 96%

“…The clenching levels (Alajbeg et al, 2005;Bernstein et al, 1981;Bonte and van Steenberghe, 1991;Celebic et al, 2007;Fung et al, 1982;van Steenberghe, 1979;Karkazis and Kossioni, 1999;Kossioni and Karkazis, 1995bDe Laat et al, 1985;van Steenberghe and Jacobs, 2006) have always been expressed as percentages of the maximum muscle activity in ICP. Moreover, the amplitudes of EMG signals depend not only on the subject variability, but also on the propagation of the muscle potentials to the electrode (amount of fat and connective tissue and the skin impedance) (Alajbeg et al, 2005;Castroflorio et al, 2006;Celebic et al, , 2007Kemsley et al, 2003).…”

Section: Right Temporalismentioning

confidence: 99%

See 1 more Smart Citation

Jaw elevator silent periods in complete denture wearers and dentate individuals

Čelebić

Valentić-Peruzović

Alajbeg

et al. 2008

Journal of Electromyography and Kinesiology

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Influence of different condylar and incisal guidance ratios to the activity of anterior and posterior temporal muscle

Cited by 8 publications

References 30 publications

Residual ridge atrophy in complete denture wearers and relationship with densitometric values of a cervical spine: a hierarchical regression analysis

Residual ridge atrophy in complete denture wearers and relationship with densitometric values of a cervical spine: a hierarchical regression analysis

The relation between incisal guidance angle and the growth and development of temporomandibular joint: a multi-cross-sectional retrospective study

Jaw elevator silent periods in complete denture wearers and dentate individuals

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