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Biomolecules Oct 2021This study aimed to analyze the effects of fibrin constructs enhanced with laminin-nidogen, implanted in the wounded rat soft palate. Fibrin constructs with and without...
This study aimed to analyze the effects of fibrin constructs enhanced with laminin-nidogen, implanted in the wounded rat soft palate. Fibrin constructs with and without laminin-nidogen were implanted in 1 mm excisional wounds in the soft palate of 9-week-old rats and compared with the wounded soft palate without implantation. Collagen deposition and myofiber formation were analyzed at days 3, 7, 28 and 56 after wounding by histochemistry. In addition, immune staining was performed for a-smooth muscle actin (a-SMA), myosin heavy chain (MyHC) and paired homeobox protein 7 (Pax7). At day 56, collagen areas were smaller in both implant groups (31.25 ± 7.73% fibrin only and 21.11 ± 6.06% fibrin with laminin-nidogen)) compared to the empty wounds (38.25 ± 8.89%, < 0.05). Moreover, the collagen area in the fibrin with laminin-nidogen group was smaller than in the fibrin only group ( ˂ 0.05). The areas of myofiber formation in the fibrin only group (31.77 ± 10.81%) and fibrin with laminin-nidogen group (43.13 ± 10.39%) were larger than in the empty wounds (28.10 ± 11.68%, ˂ 0.05). Fibrin-based constructs with laminin-nidogen reduce fibrosis and improve muscle regeneration in the wounded soft palate. This is a promising strategy to enhance cleft soft palate repair and other severe muscle injuries.
Topics: Actins; Animals; Collagen; Fibrin; Fibrosis; Humans; Laminin; Membrane Glycoproteins; Muscle, Skeletal; Myofibrils; Myosin Heavy Chains; Paired Box Transcription Factors; Palate, Soft; Rats; Regeneration; Wound Healing
PubMed: 34680180
DOI: 10.3390/biom11101547 -
Journal of Speech, Language, and... May 2020Purpose The purpose of this study is to examine the differences in velopharyngeal dimensions as well as levator veli palatini (levator) muscle morphology, positioning,...
Purpose The purpose of this study is to examine the differences in velopharyngeal dimensions as well as levator veli palatini (levator) muscle morphology, positioning, and symmetry of children with repaired cleft palate with velopharyngeal insufficiency (VPI), children with repaired cleft palate with complete velopharyngeal closure, and children with noncleft anatomy. Method Fifteen children ranging in age from 4 to 8 years were recruited for this study. Ten of the participants had a history of repaired cleft palate, half with documented VPI and the other half with velopharyngeal closure. Five participants with noncleft anatomy were matched for age from a normative database. The magnetic resonance imaging protocol, processing methods, and analysis are consistent with that used in previous literature. Results Regarding velopharyngeal dimensions, median values were statistically significantly different between groups for sagittal angle ( = .031) and effective velopharyngeal ratio ( = .013). With respect to the levator muscle, median values were statistically significant for average extravelar length ( = .018), thickness at midline ( = .021), and thickness between the left and right muscle bundles at the point of insertion into the velum ( = .037). Remaining measures were not statistically significant. Conclusions The levator muscle is significantly different among these three groups with respect to thickness at midline, extravelar length, and symmetry at the point of insertion into the velum. Sagittal angle and effective velopharyngeal ratio are also significantly different. Participants with repaired cleft palate and VPI displayed the greatest degree of asymmetry. Future research should control for surgical procedure type to determine the impact of surgery on the levator muscle and surrounding velopharyngeal anatomy.
Topics: Child; Child, Preschool; Cleft Palate; Humans; Magnetic Resonance Imaging; Palatal Muscles; Palate, Soft; Velopharyngeal Insufficiency
PubMed: 32402223
DOI: 10.1044/2020_JSLHR-19-00240 -
The Journal of Craniofacial Surgery Sep 2023To explore the speech outcomes of adult patients with repaired cleft palate through subjective perception evaluation and objective acoustic analysis, and to compare the...
OBJECTIVE
To explore the speech outcomes of adult patients with repaired cleft palate through subjective perception evaluation and objective acoustic analysis, and to compare the differences in pronunciation characteristics between speakers with complete velopharyngeal closure (VPC) and velopharyngeal insufficiency (VPI) patients.
PARTICIPANTS AND INTERVENTION
Subjective evaluation indicators included speech intelligibility, nasality and consonant missing rate, for objective acoustic analysis, we used speech sample normalization and objective acoustic parameters included normalized vowel formants, voice onset time and the analysis of 3-dimensional spectrogram and spectrum, were carried out on speech samples produced by 3 groups of speakers: (a) speakers with velopharyngeal competence after palatorrhaphy (n=38); (b) speakers with velopharyngeal incompetence after palatorrhaphy (n=70), (c) adult patients with cleft palate (n=65) and (d) typical speakers (n=30).
RESULTS
There was a highly negative correlation between VPC grade and speech intelligibility (ρ=-0.933), and a highly positive correlation between VPC and nasality (ρ=0.813). In subjective evaluation, the speech level of VPI patients was significantly lower than that of VPC patients and normal adults. Although the nasality and consonant loss rate of VPC patients were significantly higher than that of normal adults, the speech intelligibility of VPC patients was not significantly different from that of normal adults. In acoustic analysis, patients with VPI still performed poorly compared with patients with VPC.
CONCLUSIONS
The speech function of adult cleft palate patients is affected by abnormal palatal structure and bad pronunciation habits. In subjective evaluation, there was no significant difference in speech level between VPC patients and normal adults, whereas there was significant difference between VPI patients and normal adults. The acoustic parameters were different between the 2 groups after cleft palate repair. The condition of palatopharyngeal closure after cleft palate can affect the patient's speech.
Topics: Adult; Humans; Cleft Palate; Speech; Pharynx; Velopharyngeal Insufficiency; Pharyngeal Muscles
PubMed: 36949035
DOI: 10.1097/SCS.0000000000009301 -
American Journal of Otolaryngology 2022Palatal surgery remains a major option for patients with obstructive sleep apnea (OSA). We sought to evaluate the therapeutic outcomes of the palatopharyngeal muscle...
PURPOSE
Palatal surgery remains a major option for patients with obstructive sleep apnea (OSA). We sought to evaluate the therapeutic outcomes of the palatopharyngeal muscle suspension suture technique (PSST) as a novel palatal surgery for patients with OSA.
MATERIALS AND METHODS
Of the 816 patients who underwent polysomnography (PSG) from February 1, 2017, to June 30, 2020, 30 patients with OSA who underwent PSST were retrospectively reviewed. The medical records of the patients were also recorded. Among the 30 patients with OSA, nine who underwent preoperative and postoperative PSG were analyzed.
RESULTS
Of the 30 patients with OSA, 28 (93.3 %) were male. The mean (SD, standard deviation) age was 43.3 (12.7) years, and the mean (SD) body mass index was 27.3 (3.2). As objective parameters, the mean (SD) apnea-hypopnea index was significantly decreased from 45.9 (21.20) to 29.03 (21.62) (p < 0.05) and the mean (SD) lowest oxygen saturation improved significantly from 77.6 % (7.14 %) to 84.6 (5.17 %) (p < 0.05). As a subjective parameter, the mean (SD) Epworth Sleepiness Scale score decreased significantly from 10 (4.95) to 6.9 (4.57) (p < 0.05), and the mean (SD) visual analog scale score for snoring decreased significantly from 6.3 (1.8) to 3.1 (1.9) (p < 0.001). No complications, such as upper airway obstruction, intractable postoperative bleeding, or velopharyngeal insufficiency, were observed in any of the patients postoperatively.
CONCLUSIONS
A novel palatal surgery, PSST, has numerous advantages as a useful surgical option for patients with OSA. It is minimally invasive, easy, time-saving, and relatively reversible.
Topics: Humans; Male; Adult; Female; Retrospective Studies; Treatment Outcome; Sleep Apnea, Obstructive; Suture Techniques; Pharyngeal Muscles
PubMed: 36029620
DOI: 10.1016/j.amjoto.2022.103560 -
Journal of Speech, Language, and... Nov 2022There is currently little evidence reporting the typical morphology of the palatoglossus (PG) muscle. The primary purpose of this exploratory study is to determine...
PURPOSE
There is currently little evidence reporting the typical morphology of the palatoglossus (PG) muscle. The primary purpose of this exploratory study is to determine whether magnetic resonance imaging (MRI) methods used to quantify the morphology of the levator veli palatini (LVP) muscle can be applied to the PG. The secondary purpose is to provide preliminary data regarding the relationship between the LVP and PG muscles in children.
METHOD
Ten children between ages of 4 and 7 years participated in this study. Each participant was scanned using a nonsedated, child-friendly protocol with a T2-weighted, three-dimensional anatomical scan to obtain images of the oropharyngeal anatomy. Custom, oblique-coronal image planes were created to visualize and measure the LVP and PG muscles in their entirety from origin to insertion. Thermo Scientific Amira Software was used to obtain 2D measurements of PG muscle length, width, velar insertion distance, lingual insertion distance, and several angle measurements.
RESULTS
The PG ranged from 17.95 to 26.96 mm in length across participants. Velar insertion distance ranged from 17.22 to 30.95 mm. Lingual insertion distance ranged from 26.91 to 36.02 mm. Width ranged from 2.32 to 3.08 mm. The angle formed by the PG and LVP muscle planes ranged from 7.3° to 52.7°. The LVP insertion angle ranged from 42.5° to 75.9°. The PG insertion angle ranged from 16.9° to 52.3°.
CONCLUSIONS
MRI was successful in visualizing the PG muscle. The PG was consistent in size and shape within an individual participant but varied across the participant cohort.
Topics: Humans; Child, Preschool; Child; Palatal Muscles; Magnetic Resonance Imaging; Tongue; Software; Palate, Soft
PubMed: 36283682
DOI: 10.1044/2022_JSLHR-22-00303 -
International Orthodontics Mar 2021This systematic review assessed the effects of tooth-borne (TB), tooth-bone-borne (TBB) and bone-borne (BB) micro-implant assisted rapid maxillary expansion (RPE) on... (Meta-Analysis)
Meta-Analysis
OBJECTIVE
This systematic review assessed the effects of tooth-borne (TB), tooth-bone-borne (TBB) and bone-borne (BB) micro-implant assisted rapid maxillary expansion (RPE) on airway dimensions and function in young children and adolescents (10- to 17-years-old).
MATERIALS AND METHODS
Unrestricted search in 5 electronic databases until June 6th, 2020 was undertaken. This was supplemented with search in 6 additional resources for published, unpublished and ongoing trials up. Randomized (RCT) and non-randomized (Non-RCT) prospective studies that assessed the influence of the mini-screw-assisted rapid palatal expansion (MARPE) approach on airway and breathing in young children and adolescents were included. Two reviewers performed the study selection and data extraction blindly and in duplicate by two authors while disagreements. A random-effects model with a 95% confidence interval (CI), I2 and Chi tests were done. ROBINS-I, Cochrane Risk of Bias and GRADE tools were used. Reporting of this review was based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines.
RESULTS
Overall, 518 articles were retrieved; only 3 studies (2 RCT and one non-RCT) met the inclusion criteria. Both TB RPE and BB RPE improved on a short-term basis the dimensions of the airway, though the difference was not significant (P>0.05). TBB RPE significantly improved nasal airflow [(Mean difference (MD) 52.7 cm/s, 95% confidence interval (95% CI) 9.0-96.4), P=0.020)], reduced nasal resistance (MD -0.20Pa/cm, 95% (-0.38)-(-0.02), P=0.028), and changed respiratory muscle strength variables (P>0.05). No correlation was found between the anatomical dimensions of the airway and the functional airway parameters (P>0.05).
CONCLUSIONS
The short-term airway volumetric changes secondary to MARPE were not significant. The influence of MARPE appliances on breathing is still not clear. Registration PROSPERO database (CRD42020183340).
Topics: Adolescent; Bone Screws; Child; Databases, Factual; Humans; Maxilla; Middle Aged; Palatal Expansion Technique; Palate; Respiration
PubMed: 33516650
DOI: 10.1016/j.ortho.2021.01.004 -
ELife Dec 2022The communication between myogenic cells and their surrounding connective tissues is indispensable for muscle morphogenesis. During late embryonic development in mice,...
The communication between myogenic cells and their surrounding connective tissues is indispensable for muscle morphogenesis. During late embryonic development in mice, myogenic progenitors migrate to discrete sites to form individual muscles. The detailed mechanism of this process remains unclear. Using mouse levator veli palatini (LVP) development as a model, we systematically investigated how a distinct connective tissue subpopulation, perimysial fibroblasts, communicates with myogenic cells to regulate mouse pharyngeal myogenesis. Using single-cell RNAseq data analysis, we identified that TGF-β signaling is a key regulator for the perimysial fibroblasts. Loss of TGF-β signaling in the neural crest-derived palatal mesenchyme leads to defects in perimysial fibroblasts and muscle malformation in the soft palate in mice. In particular, Creb5, a transcription factor expressed in the perimysial fibroblasts, cooperates with TGF-β signaling to activate expression of . Moreover, Fgf18 supports pharyngeal muscle development and exogenous Fgf18 can partially rescue myogenic cell numbers in samples, illustrating that TGF-β-regulated Fgf18 signaling is required for LVP development. Collectively, our findings reveal the mechanism by which TGF-β signaling achieves its functional specificity in defining the perimysial-to-myogenic signals for pharyngeal myogenesis.
Topics: Mice; Animals; Receptor, Transforming Growth Factor-beta Type I; Palate, Soft; Muscles; Transforming Growth Factor beta; Muscle Development
PubMed: 36542062
DOI: 10.7554/eLife.80405 -
The Cleft Palate-craniofacial Journal :... Jul 2022Palatoplasty would involve the structures around the pterygoid hamulus. However, clinicians hold different opinions on the optimal approach for the muscles and palatine...
OBJECTIVE
Palatoplasty would involve the structures around the pterygoid hamulus. However, clinicians hold different opinions on the optimal approach for the muscles and palatine aponeurosis around the pterygoid hamulus. The absence of a consensus regarding this point can be attributed to the lack of investigations on the exact anatomy of this region. Therefore, we used micro-computed tomography to examine the anatomical structure of the region surrounding the pterygoid hamulus.
DESIGN
Cadaveric specimens were stained with iodine-potassium iodide and scanned by micro-computed tomography to study the structures of the tissues, particularly the muscle fibers. We imported Digital Imaging and Communications in Medicine images to Mimics to reconstruct a 3-dimensional model and simplified the model.
RESULTS
Three muscles were present around the pterygoid hamulus, namely the palatopharyngeus (PP), superior constrictor (SC), and tensor veli palatini (TVP). The hamulus connects these muscles as a key pivot. The TVP extended to the palatine aponeurosis, which bypassed the pterygoid hamulus, and linked the PP and SC. Some muscle fibers of the SC originated from the hamulus, the aponeurosis of which was wrapped around the hamulus. There was a distinct gap between the pterygoid hamulus and the palatine aponeurosis. This formed a pulley-like structure around the pterygoid hamulus.
CONCLUSIONS
Transection or fracture of the palatine aponeurosis or pterygoid hamulus, respectively, may have detrimental effects on the muscles around the pterygoid hamulus, which play essential roles in the velopharyngeal function and middle ear ventilation. Currently, cleft palate repair has limited treatment options with proven successful outcomes.
Topics: Cleft Palate; Humans; Palatal Muscles; Palate, Soft; Pharyngeal Muscles; Sphenoid Bone; X-Ray Microtomography
PubMed: 34402314
DOI: 10.1177/10556656211036302 -
Medicina (Kaunas, Lithuania) Apr 2020Subepithelial connective tissue graft (SCTG) from the palate has been considered as the "gold standard" for the treatment of deep gingival recessions. A single-incision...
BACKGROUND AND OBJECTIVES
Subepithelial connective tissue graft (SCTG) from the palate has been considered as the "gold standard" for the treatment of deep gingival recessions. A single-incision technique was reported to allow primary wound healing. A palatal single incision was performed in a rat model. The present study assessed the histology and histomorphometry of palatal wound healing following surgical closure with primary intention.
MATERIALS AND METHODS
Twenty-six 6-month-old male Wistar rats weighing 427-650 g. An incision was made on the maxillary palate. A full thickness flap was raised palatally, and then repositioned and sutured. Two experimental groups: S-Study group, I-Intact control group. Half of the animals were sacrificed 7 days and the remaining 14 days postoperatively. Outcome parameters included-epithelial gap; inflammatory infiltration; vascular fraction, expression of myofibroblasts and stem cell markers within the oral epithelium and stromal cells and physical properties of stromal collagen fibers. Investigations were performed at two time-points (7 and 14 days) during the wound healing process.
RESULTS
The epithelial gap closed completely after 14 days. The inflammatory reaction and vascular fraction were relatively low. Surgical trauma downregulated the expression of cytokeratin (CK) 14 and CK 15, which returned to normal after 14 days. Epithelial differentiation was mediated through upregulation of connective tissue sex- determining-region-Y-box2 (SOX2). Epithelial SOX2, CD34, alpha smooth muscle actin (αSMA) and physical properties of stromal collagen fibers were not influenced by the surgical trauma.
CONCLUSIONS
Surgical trauma followed by palatal wound healing with primary intention in a rat model heals within 14 days. It induces minimal inflammatory infiltration and vascular proliferation. Epithelization is exerted through promotion of epithelial differentiation from stem cells by connective tissue SOX2.
Topics: Animals; Gingival Recession; Humans; Male; Palate; Random Allocation; Rats; Rats, Wistar; Surgical Flaps; Wound Healing
PubMed: 32344587
DOI: 10.3390/medicina56040200 -
Archives of Oral Biology Feb 2021The aim of this study was to analyze the function of the palatal muscles in vivo by real-time wireless electromyography in rats. The effects of palatal wounding were...
OBJECTIVE
The aim of this study was to analyze the function of the palatal muscles in vivo by real-time wireless electromyography in rats. The effects of palatal wounding were also analyzed.
METHODS
Microelectrodes were implanted six rats; in the masseter muscle (two-rats) for comparison, in the unwounded soft palate (two-rats) and the soft palate that received a surgical wound (two-rats). Two weeks after implantation, a wound was made in the soft palate using a 1 mm biopsy-punch. Electromyographic measurements and video-recordings were taken weekly to monitor train-duration and peak-amplitude during eating, grooming and drinking.
RESULTS
The train-duration of the masseter muscle during eating was 0.49 ± 0.11 s (rat-1) and 0.56 ± 0.09 s (rat-2), which was higher than during grooming. In the unwounded soft palate the train-duration during eating was 0.63 ± 0.12 s (rat-1) and 0.69 ± 0.069 s (rat-2), which was higher than during grooming and drinking. The peak-amplitude for eating in the normal soft palate before surgery was 0.31 ± 0.001 mV (rat-1) and 0.33 ± 0.02 mV (rat-2). This decreased to 0.23 ± 0.03 mV and 0.25 ± 0.11 mV respectively, after surgery. For drinking the peak-amplitude was 0.30 ± 0.01 mV (rat-1) and 0.39 ± 0.01 mV (rat-2) before surgery, which decreased to 0.23 ± 0.09 mV and 0.20 ± 0.14 mV respectively, after surgery.
CONCLUSION
The reduced peak-amplitude suggests impaired soft palate function after wounding. This is the first study into the in vivo function of the soft palate after surgical wounding. This model will contribute to develop strategies to improve soft palate function in patients.
Topics: Animals; Electromyography; Masseter Muscle; Palatal Muscles; Palate, Soft; Rats; Wounds and Injuries
PubMed: 33348206
DOI: 10.1016/j.archoralbio.2020.105021