scholarly journals Relationship between Frontal Gap and Postoperative Stability in the Treatment of Mandibular Prognathism

2016 ◽  
Vol 2016 ◽  
pp. 1-5
Author(s):  
Yu-Chuan Tseng ◽  
Kun-Jung Hsu ◽  
Ker-Kong Chen ◽  
Ju-Hui Wu ◽  
Chun-Ming Chen
Keyword(s):  
Multiple Regression Model ◽  
Linear Measurements ◽  
Mandibular Prognathism ◽  
Mandibular Setback ◽  
Intraoral Vertical Ramus Osteotomy ◽  
The Mean ◽  
The Right ◽  
Skeletal Stability ◽  
Primary Risk Factor

Objectives. To investigate the correlation between frontal gaps and skeletal stability after intraoral vertical ramus osteotomy (IVRO) for correction of mandibular prognathism.Materials and Methods. Thirty-three patients with frontal gaps after IVRO-based mandibular prognathism correction were included. Three lateral and frontal cephalometric radiographs were obtained: preoperatively (T1), immediately postoperatively (T2), and 2 years postoperatively (T3). Two linear measurements (menton [Me] and frontal gap) were compared from T1 to T3 (T21: immediate surgical changes; T32: postoperative stability; T31: 2-year surgical change). Data were analyzed using Pearson’s correlation coefficient and multiple linear regression.Results. The T21 mean surgical horizontal change in the Me position was12.4±4.23 mm. Vertically, the mean downward Me movement was0.6±1.73 mm. The mean frontal gaps were4.7±2.68 mm and4±2.48 mm in the right and left gonial regions, respectively. Postoperative stability (T32) significantly correlated with the amount of setback. Frontal gaps did not have a significant effect on postoperative stability. However, multiple regression model (R2=0.341,P=0.017) showed value predictability, especially in the amount of setback.Conclusion. Frontal gaps occur after IVRO but have no significant effect on long-term postoperative skeletal stability. The primary risk factor for postoperative relapse remains the amount of mandibular setback.

scholarly journals Intraoperative Hemorrhage and Postoperative Sequelae after Intraoral Vertical Ramus Osteotomy to Treat Mandibular Prognathism

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Chun-Ming Chen ◽  
Steven Lai ◽  
Ker-Kong Chen ◽  
Huey-Er Lee
Keyword(s):  
Blood Loss ◽  
Operating Time ◽  
Rank Correlation ◽  
Men And Women ◽  
Mandibular Prognathism ◽  
Mandibular Setback ◽  
Intraoral Vertical Ramus Osteotomy ◽  
The Mean ◽  
Blood Loss Volume ◽  
Vertical Ramus Osteotomy

Objective.To investigate the factors affecting intraoperative hemorrhage and postoperative sequelae after orthognathic surgery.Materials and Methods.Eighty patients with mandibular prognathism underwent surgical mandibular setback with intraoral vertical ramus osteotomy (IVRO). The correlation between the blood loss volume and postoperative VAS with the gender, age, and operating time was assessed using thet-test and Spearman rank correlation coefficient. The correlation between the magnitude of mandibular setback with the presence of TMJ clicking symptoms and lip sensation was also assessed.Results.The mean operating time and blood loss volume for men and women were 249.52 min and 229.39 min, and 104.03 mL and 86.12 mL, respectively. The mean VAS in men and women was 3.21 and 2.93, and 1.79 and 1.32 on the first and second postoperative days. There is no gender difference in the operating time, blood loss, VAS, TMJ symptoms, and lip numbness. The magnitude of mandibular setback was not correlated with immediate and long-term postoperative lip numbness.Conclusion.There are no gender differences in the intraoperative hemorrhage and postoperative sequelae (pain, lip numbness, and TMJ symptoms). In addition, neither symptom was significantly correlated with the amount of mandibular setback.

scholarly journals A Diffusion Tensor Imaging Study on the Phonology-related Pathways in Cantonese-mandarin Bilinguals.

2021 ◽  
Author(s):  
Xiaoyu Xu ◽  
Yuying Jin ◽  
Ning Pan ◽  
Muqing Cao ◽  
Jin Jing ◽  
...  
Keyword(s):  
White Matter ◽  
Phonological Processing ◽  
Diffusion Tensor ◽  
Mean Diffusivity ◽  
Imaging Study ◽  
Brain White Matter ◽  
The Mean ◽  
The Right ◽  
Long Term Experience

Abstract Cantonese and Mandarin are logographic languages, and the phonology is the main difference between the two languages. It is unclear whether long-term experience of Cantonese-Mandarin bilingualism will shape different brain white matter structures of pathways related to phonological processing. 30 Cantonese-Mandarin bilinguals and 30 Mandarin monolinguals completed diffusion-weighted imaging (DWI) scans and phonological processing tasks. The tractography and TBSS were used to investigate the structural differences in the bilateral superior longitudinal fasciculus (SLF), inferior longitudinal fasciculus (ILF) and inferior fronto-occipital fasciculus (IFOF) between Cantonese-Mandarin bilinguals and Mandarin monolinguals. Post-hoc correlation analysis was conducted to investigate the relationship between the different structures with phonological processing skills. Compared to the Mandarin monolinguals, the Cantonese-Mandarin bilinguals had higher fractional anisotropy (FA) along the left ILF, higher mean diffusivity (MD) in the clusters along the temporoparietal segment of SLF (tSLF), as well as higher axial diffusivity (AD) in the right tSLF, IFOF, bilateral ILF. The mean AD of the different voxels in the right IFOF and the mean FA of the different voxels in the left ILF were positively correlated with the inverse efficiency score (IES) of the Cantonese auditory and Mandarin visual rhyming judgment tasks respectively within the bilingual group. Long-term experience of Cantonese-Mandarin bilinguals shape different brain white matter structures including right tSLF, IFOF, bilateral ILF. The bilinguals’ white matter showed higher diffusivity, especially in the axonal direction, than the monolinguals. These changes were related to bilinguals’ phonological processing.

scholarly journals Are Hyoid Bone and Tongue the Risk Factors Contributing to Postoperative Relapse for Mandibular Prognathism?

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Yu-Chuan Tseng ◽  
Steven Lai ◽  
Huey-Er Lee ◽  
Ker-Kong Chen ◽  
Chun-Ming Chen
Keyword(s):  
Linear Regression ◽  
Multiple Linear Regression ◽  
Hyoid Bone ◽  
Pearson Correlation ◽  
Multiple Linear Regression Model ◽  
Mandibular Prognathism ◽  
Mandibular Setback ◽  
Lateral Cephalograms ◽  
Intraoral Vertical Ramus Osteotomy ◽  
One Year

Objective. The purpose of this study was to investigate postoperative stability and the correlation between hyoid, tongue, and mandible position following surgery for mandibular prognathism.Materials and Methods. Thirty-seven patients, treated for mandibular prognathism using intraoral vertical ramus osteotomy (IVRO), were evaluated cephalometrically. A set of four standardized lateral cephalograms were obtained from each subject preoperatively (T1), immediately postoperatively (T2), six weeks to three months postoperatively (T3), and more than one year postoperatively (T4). The Studentt-tests, the Pearson correlation coefficient, and the multiple linear regression were used for statistical analysis.Results. Immediately after surgery, menton (Me) setback was 12.8 mm, hyoid (H) setback was 4.9 mm, and vallecula epiglottica (V) setback was 5.8 mm. The postoperative stability significantly correlated (r=-0.512,p<0.01) with the amount of setback. The hyoid bone and tongue did not have significant effects on postoperative stability. Multiple linear regression model (R2=0.2658,p<0.05) showed predictability: Horizontal Relapse Me (T4-T2) = −6.406 − 0.488Me (T2-T1) + 0.069H (T2-T1) − 0.0619V (T2-T1).Conclusion. Mandibular setback surgery may push the hyoid and tongue significantly backward, but this did not correlate with mandibular relapse. Postoperative stability significantly correlated with the amount of mandibular setback.

Surgery for Aortic Insufficiency Associated with Ventricular Septal Defect

2005 ◽  
Vol 13 (1) ◽  
pp. 61-64 ◽  
Author(s):  
Chareonkiat Rergkliang ◽  
Vorawit Chittithavorn ◽  
Apirak Chetpaophan ◽  
Prasert Vasinanukorn
Keyword(s):  
Ventricular Septal Defect ◽  
Septal Defect ◽  
Aortic Insufficiency ◽  
Aortic Cusp ◽  
The Mean ◽  
Coronary Cusp ◽  
The Right ◽  
Right Coronary Cusp

Aortic valve repair in children is a challenge. We have adopted a technique of single aortic cusp extension with an autologous pericardial strip in patients diagnosed with severe aortic insufficiency (AI) associated with a ventricular septal defect (VSD). The purpose of this study was to report the short-term outcomes. Seven patients were operated on between January 2002 and December 2003. The mean age was 11.28 ± 2.1 years (range 8–14 years). The VSD was closed with a synthetic patch. Aortic cusp extension was performed at the right coronary cusp in 6 patients and the remainder had a non-coronary cusp extension. The mean diastolic arterial pressure increased from 35.71 ± 6.09 to 74.28 ± 7.31 mm Hg after the operation ( p < 0.001). The postoperative grade of AI was trivial in 4 patients, mild in 1 patient and non-existent in 2 patients. The mean follow-up period was 12.85 ± 6.12 months (range 2–20 months). This technique is very effective in patients with severe AI associated with a VSD. However, long-term durability will need to be carefully followed.

Eye Movements While Driving Cars around Curves

1977 ◽  
Vol 44 (3) ◽  
pp. 683-689 ◽  
Author(s):  
Amos S. Cohen ◽  
Herbert Studach
Keyword(s):  
Eye Movements ◽  
Eye Movement ◽  
Vehicle Control ◽  
Eye Fixation ◽  
Eye Fixations ◽  
The Future ◽  
The Mean ◽  
The Right

The eye fixations of 5 experienced and 4 inexperienced car drivers were analyzed while driving curves to the left and to the right. For experienced drivers in a curve to the left the mean duration of eye fixations was longer and the amplitude of the eye movements greater than in a curve to the right. No such difference was observed in inexperienced drivers who manifested neither uniformity within the same curves nor differentiation between the two types of curves. Mean duration of eye fixations of experienced subjects was shorter while driving in a curve to right, but their amplitude of eye movement was greater in a curve to left than those of inexperienced drivers. In Exp. 2, it was pointed out that there is already a change in the pattern of eye movements prior to entering a curve. Upon approaching the curve the mean duration of eye fixation decreased, and the fixations were mainly shifted toward the future driving path. Results are interpreted in terms of the adequacy of the eye fixations (supposedly influenced by prior long-term learning) for information at near distance for vehicle control and at longer distances for setting up proprioceptive forward programs for possible future sensomotoric activity.

scholarly journals Long Term Follow-up Results of Ablation Treatment for Patients with Small Renal Mass

2020 ◽  
Author(s):  
Bilal Gumus ◽  
Ali Albaz ◽  
Fatih Düzgün ◽  
Oktay Ucer ◽  
Gokhan Temeltas ◽  
...  
Keyword(s):  
Renal Mass ◽  
Demographic Data ◽  
Left Kidney ◽  
Treatment Success ◽  
Minor Bleeding ◽  
Small Renal Mass ◽  
The Mean ◽  
The Right

Objective: The aim of this study is to evaluate the outcome of ablation therapy in our clinic for the treatment of patients with small renal mass Materials and Methods: We retrospectively evaluated the technic and follow-up data of 30 patients with 36 tumors who underwent Radiofrequency Ablation (RFA) and Microwave Ablation (MWA) in our clinic. Demographic data, ablation type, tumor characteristics, peroperative and postoperative complications and treatment success of the patients were evaluated. Results: A total of 36 tumors who underwent ablation treatments, 23 were treated with RFA, 13 with MWA. The mean tumor size was 28.9 ± 6.92 mm in RFA and 29.3 ± 7.70 mm in MWA. 12 (52.1%) of the RFA procedures were applied to the right kidney while 11 (47.8%) were applied to the left kidney. 6 (46.1%) of the MWA procedures were performed on the right kidney and 7 (53.8%) on the left kidney. Of the 36 tumors, 4 (11.1%) were located central and 32 (88.8%) were peripheral. Complications occurred in 2 patients. In one of these patients, acute renal failure and urea creatinine were found to be elevated. In the other patient, local pain was found in the ablation side and minor bleeding was detected at the ablation site in USG. The mean follow-up period was 49.6 ± 24.7 months in patients with RFA and mean follow-up was 16 ± 8,05 months in MWA treatments. The overall success in MWA administration was calculated as 76.9%, while the overall success in RFA was 80%. Conclusion: Long-term oncologic efficacy of RFA appears to be successful in the treatment of T1a renal carcinomas. Further studies can be conducted to elucidate the influence of MWA on long-term oncological outcomes.

The GraftConnector Experience

Swiss Surgery ◽  
2001 ◽  
Vol 7 (5) ◽  
pp. 209-210 ◽  
Author(s):  
Piergiorgio Tozzi ◽  
Jan Otto Solem ◽  
Boumzebra ◽  
Antonio Mucciolo ◽  
Xavier Mueller ◽  
...  
Keyword(s):  
Internal Mammary Artery ◽  
Long Term Results ◽  
Sheep Model ◽  
Adult Sheep ◽  
Internal Mammary ◽  
The Mean ◽  
The Right

Background: A device to perform sutureless end-to-side coronary artery anastomosis has been developed by means of stent technology (GraftConnector). The present study assesses the long-term quality of the GraftConnector anastomosis in a sheep model. Methods: In 8 adult sheep, 40-55kg in weight, through left anterior thoracotomy, the right internal mammary artery (RIMA) was prepared and connected to the left anterior descending artery (LAD) by means of GraftConnector, on beating heart, without using any stabiliser. Ticlopidine 250mg/day for anticoagulation for 4 weeks and Aspirin 100mg/day for 6 months were given. The animals were sacrificed after 6 months and histological examination of anastomoses was carried out after slicing with the connector in situ for morphological analysis. Results: All animals survived at 6 months. All anastomoses were patent and mean luminal width at histology was 1.8 0.2mm; mean myointima hyperplasia thickness was 0.21 0.1mm. Conclusions: Long-term results demonstrate that OPCABGs performed with GraftConnector had 100% patency rate. The mean anastomotic luminal width corresponds to mean LAD's adult sheep diameter. We may speculate that myointima hyperplasia occurred as a result of local device oversizing.

Distraction Osteogenesis: Treatment of a Case with Maxillary Hypoplasia and Mandibular Prognatism

2011 ◽  
Vol 1 (3) ◽  
pp. 92
Author(s):  
Ayşegül Apaydın ◽  
Serdar Yenigün ◽  
Taylan Can
Keyword(s):  
Distraction Osteogenesis ◽  
Native Speakers ◽  
Exercise Program ◽  
Maxillary Hypoplasia ◽  
Mandibular Prognathism ◽  
Mandibular Setback ◽  
Alternative Approach ◽  
Functional Exercise ◽  
Native Speakers Of English

method for treating mandibular prognathism, distraction osteogenesis (DO) of the maxillary complex is an alternative approach. Methodology: The clinical and radiological examinations of a 29-year-old male revealed maxillary retrognathism and mandibular prognathism without a vertical abnormality. The patient was treated with maxillary advancement by DO and mandibular setback surgery. Results: Long-term functional muscle exercises were scheduled. No relapse has occurred. Conclusions: We believe that the patient’s cooperation and commitment to the functional exercise program played the most important role in the long-term success.  How to cite this article: Apaydın A, Yenigün S, Can T. Distraction Osteogenesis: Treatment of a Case with Maxillary Hypoplasia and Mandibular Prognatism. Int Dent Res 2011;3:92-94. Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

scholarly journals Postoperative Skeletal Stability and Pharyngeal Airway: Counterclockwise versus Clockwise Rotation during Mandibular Setback Surgery

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Yu-Chuan Tseng ◽  
Szu-Yu Hsiao ◽  
Jung-Hsuan Cheng ◽  
Kun-Jung Hsu ◽  
Chun-Ming Chen
Keyword(s):  
Soft Palate ◽  
Clockwise Rotation ◽  
Time Intervals ◽  
Physiological Regulation ◽  
Pharyngeal Airway ◽  
Mandibular Setback ◽  
The Mean ◽  
Mandibular Setback Surgery ◽  
Craniovertebral Angle ◽  
Skeletal Stability

Purpose. To compare the effects of counterclockwise rotation (CCR) and clockwise rotation (CR) of the mandible on the pharyngeal airway during mandibular setback surgery. Materials and Methods. Serial cephalograms of 40 patients with mandibular prognathism, including 20 who underwent CCR and 20 who underwent CR, were taken at the following time intervals: preoperatively (T1), immediately postoperatively (T2), >1 year after surgery (T3), final surgical changes (T31), postoperative stability (T32), and immediate surgical change (T21). Changes in menton (Me) and hyoid (H) positions, soft palate width, soft palate length, soft palate angle and craniovertebral angle (C2C4-SN), and pharyngeal airway spaces (nasal pharyngeal airway (NOP), uvula pharyngeal airway (UOP), tongue pharyngeal airway (TOP), and epiglottis pharyngeal airway (EOP)) were evaluated. Results. The mean Me (T31) setback for CCR and CR was 12.56 and 13.06 mm, respectively, with 2.41 mm upward and 3.29 mm downward, respectively. The vertical Me position of CR exhibited significant downward movement compared with that of CCR. The mean H setback results for CCR and CR were 4.42 and 5.75 mm, respectively, with 1.47 mm downward and 2.97 mm downward, respectively. The C4C2-SN angles for CCR and CR increased by 2.68° and 3.65°, respectively, whereas their palatal angles increased by 2.35° and 5.25°, respectively. Pearson’s correlation analysis (T31) revealed that for CCR, no pharyngeal airway spaces were significantly correlated with any measured variables. In CR, NOP was significantly correlated (r = 0.58) with the vertical Me position. Significant relapse (T32) was observed after CR in the horizontal (r = −0.72) and vertical (r = −0.82) Me positions. Conclusion. Pharyngeal airway space narrowed postoperatively, and its patency was appropriately maintained through natural physiological regulation of the craniovertebral angle (C2C4-SN). Significant postoperative relapse was correlated with CR.

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