Early and long-term changes in the muscles of the mandible following orthognathic surgery

Coclici, Alina; Hedeșiu, Mihaela; Bran, Simion; Băciuţ, Mihaela; Dinu, Cristian; Rotaru, Horaţiu; Roman, Raluca

doi:10.1007/s00784-019-03019-3

Cited by 14 publications

(10 citation statements)

References 29 publications

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“…An ultrasound device with a convex probe (Sonosite M‐Turbo with C60x/5‐2 probe; FUJIFILM Sonosite Inc, Bothell, USA) was utilised in B‐mode for this purpose. (Figure 1) The GH muscle was identified and observed by aligning the transducer to the long axis of the muscle, as previously described 18 . The participants were asked to perform the jaw‐retraction exercise and contract the GH muscle as much as possible while using the ultrasound images as a real‐time visual aid.…”

Section: Methodsmentioning

confidence: 99%

“…(Figure 1) The GH muscle was identified and observed by aligning the transducer to the long axis of the muscle, as previously described. 18 The participants were asked to perform the jawretraction exercise and contract the GH muscle as much as possible while using the ultrasound images as a real-time visual aid. With practice, they were able to perform the task consistently with an observable decrease in GH muscle length through biofeedback.…”

Section: Jaw-retraction Exercisementioning

confidence: 99%

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Jaw‐retraction exercise increases anterior hyoid excursion during swallowing in older adults with mild dysphagia

et al. 2021

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Objectives The present study aimed to evaluate the effectiveness of a newly designed jaw‐retraction exercise for strengthening the geniohyoid muscle and thus improving the anterior movement of the hyoid bone during swallowing. Background Although previous studies suggest a relationship between anterior hyoid excursion and upper esophageal sphincter (UES) opening, there are currently no reports of physical exercises without the use of special equipment that can effectively improve this movement of the hyoid bone during swallowing. Materials and methods This before‐after study included patients presenting to the authors' hospital with mild dysphagia (Level 5 on the Dysphagia Outcome and Severity Scale). The participants were instructed to perform a jaw‐retraction exercise designed to strengthen the geniohyoid muscle. Each participant was instructed to perform two sets of the exercise daily for four weeks, with each set consisting of five repetitions. Before and after the four‐week training period, videofluoroscopic swallowing studies were performed and later analysed. Results Twenty‐five patients with a median age of 77 were included. The median peak anterior hyoid position before and after exercise were 129.82 and 132.74 (%C2‐C4 length), respectively, and this increase was found to be significant (P = .007). The median extent of UES opening before and after exercise were 8.6 and 9.3 (mm), respectively, and this increase was also found to be significant (P = .040). Conclusion Our findings demonstrate that the jaw‐retraction exercise can effectively improve the anterior movement of the hyoid bone. This exercise may be effective in individuals with oral frailty when signs of swallowing disorders are observed.

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Section: Methodsmentioning

confidence: 99%

Section: Jaw-retraction Exercisementioning

confidence: 99%

Jaw‐retraction exercise increases anterior hyoid excursion during swallowing in older adults with mild dysphagia

et al. 2021

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“…Orthodontic preparation for performing dental alignment and incisor decompensation was performed for the purpose to obtain maximum intercuspal interdigitation postoperatively. Radiographic evaluation including orthopantograms fig (2), Lateral cephalometric view (to detect properly the distance of bone set back that was needed) fig (3) and computerized tomograms (Axial, coronal and 3D scan were performed for all patients) fig (4). These radiographs facilitate the treatment plan and to detect properly the accurate cut site and accurate bone set back to obtain proper jaw relations postoperatively .…”

Section: Preoperative Managementmentioning

confidence: 99%

“…The purpose of orthognathic surgery is to improve the occlusal relations, improve the facial aesthetics and to maintain the long-term stability of the newly created jaw relationship (1) . There is variable response of the mandibular muscles to the surgical jaw repositioning procedures that may be related to the muscular insertion and movement task of each masticatory muscle (2) . However, the results of orthognathic surgery are not always stable.…”

Section: Introductionmentioning

confidence: 99%

Changes in Masticatory Muscles following orthognathic surgery (BSSO for correction of skeletal class III deformity )

Naguib

Abdelmabood

Naguib

2021

Egyptian Dental Journal

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Aim: To evaluate the postoperative electromyographic changes of temporalis and masseter muscles activity, in patients with orthognathic surgery BSSO,for correction of mandibular prognathism. Material and Methods:Eight adult patients, their ages ranged from 22-45 years, five females and three males, suffering from mandibular prognathism. underwent BSSO, for performing mandibular setback. EMG examinations(peak to peak amplitude, for detection of the strength of contraction of both temporalis and masseter muscles) were done presurgical and twelve months postoperatively.Results: Significant increase in peak-to-peak amplitude values of both temporalis muscles was founded. Moreover, an increase in peak-to-peak amplitude values of both masseter muscles was found,.No significant differences were found in the mean frequency score (as one of the variables of the EMG measurement) of the masseter muscles before bilateral sagittal split osteotomy and that undertaken 12 months after bilateral sagittal split osteotomy (P = 0.06). An increase in the mean peak to peak amplitude score for the right and left temporalis muscle was found, with significant differences between the measurement found 12 months after bilateral sagittal split osteotomy, and that measured before bilateral sagittal split osteotomy fig ( 6) (P = 0.002,0.0001 respectively) Conclusion:No change in the strength of contraction of both temporalis and masseter muscle had detected after performing BSSO for correction of mandibular prognathism ,as detected by EMG examination.

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“…Even when not specifically targeting the TMJ, orthognathic surgery affects this region through muscle forces. Following orthognathic surgery, the mandibular muscles display a range of adaptive responses [ 9 ]. Individuals having bimaxillary orthognathic surgery may have a relapse and temporomandibular dysfunction as postoperative consequences [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Mandibular Condyle Morphologic Relation before and after Orthognathic Surgery in Class II and III Malocclusion Patients Using Cone Beam Computed Tomography

Roman

Almășan

Hedeșiu

et al. 2022

Biology

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This study aimed at evaluating the mandibular condyle position changes before and after bimaxillary orthognathic surgery in class II and III malocclusion patients. CBCT scans from patients who underwent bimaxillary orthognathic surgery were analyzed: Le Fort I osteotomy and bilateral sagittal split osteotomy (BSSO). Both condyles were independently assessed for their largest anterior and posterior joint spaces, smallest medial joint spaces, and condyle angles concerning the transverse line. In the sagittal plane, the minimum size of the anterior and posterior joint spaces was measured. In the coronal plane, the smallest medial joint space was measured. The position of the condyle within the glenoid fossa was determined before and after surgery. A total of 56 TMJs from 28 patients were studied. Following orthognathic surgery, the anterior and posterior space in class II increased. Postoperatively, the anterior joint space in class III decreased. In 42.85% of malocclusion class II patients and 57.14% of malocclusion class III patients, the pre-and post-surgical position of the condyle changed, the condyle was anteriorly positioned (42.85%) in class II patients and centrically positioned (71.4%) in class III patients. Significant changes in the joint space, condylar position, and condyle angle were found in the class II and class III subjects.

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Early and long-term changes in the muscles of the mandible following orthognathic surgery

Cited by 14 publications

References 29 publications

Jaw‐retraction exercise increases anterior hyoid excursion during swallowing in older adults with mild dysphagia

Jaw‐retraction exercise increases anterior hyoid excursion during swallowing in older adults with mild dysphagia

Changes in Masticatory Muscles following orthognathic surgery (BSSO for correction of skeletal class III deformity )

Evaluation of the Mandibular Condyle Morphologic Relation before and after Orthognathic Surgery in Class II and III Malocclusion Patients Using Cone Beam Computed Tomography

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