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Introduction: This in-vitro study investigated limitations of intra-oral scanners (IOS) in capturing palatal defects at decreased mouth openings. The trueness and precision of composite 3D-printed models from Cone-Beam Computed Tomography (CBCT) and IOS were measured.
Methods: A partially dentate palatal defect model was scanned with IOS (3M™TrueDefinition) at various simulated mouth openings. Five silicone impressions were poured in gypsum. Scans were taken using 3M™TrueDefinition; Planmeca Planscan®, n=5 each. Model was scanned on two CBCT (PlanmecaProFace®; Accuitomo170®CBCT, n=5 each). Geomagic®Control2014™ was used to create composite-models merging CBCT with IOS. Thirty composite-models were 3D-printed. Trueness and precision were measured. Pearson Correlation Coefficients measured correlation between mouth opening and data capture. Data analysed using Kruskal-Wallis, Wilcoxon rank-sum, and ANOVA. Statistical significance inferred when p⟨0.05.
Results: Mouth openings ⟨20mm, IOS didn't capture information of soft tissue. Increased mouth opening positively correlated with increased data capture(r=0.93, p=0.001). AccuitomoCBCT and TrueDefinition IOS composite-models had the highest (trueness) and [precision](median (IQR) 0.172 mm(0.062-0.426)); [mean [SD] 0.080 mm [0.008]]. Casts had the lowest results (median (IQR) 0.289 mm(0.119-1.565));[mean [SD] 0.338 mm [0.089]](p⟨0.001).
Conclusion: Mouth opening ⟨20mm resulted in insufficient data capture by IOS for clinical applications. Composite digital models showed promising trueness and precision results.
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http://dx.doi.org/10.1922/EJPRD_2586AbuBaker08 | DOI Listing |
This article presents the clinical case of a 42-year-old woman with chronic pain in her left temporomandibular joint (TMJ) and limited mouth opening. The patient also reported anxiety and difficulty sleeping. Cone beam computed tomography revealed impacted maxillary third molars and hypertrophy of the nasal turbinates.
View Article and Find Full Text PDFHCA Healthc J Med
February 2025
Ross University School of Medicine, Barbados.
Background: Airway management in emergency situations poses significant challenges, particularly in patients with difficult airway anatomy or comorbid conditions. Blind nasal intubation has been explored as a rescue technique when conventional methods fail. Masseter muscle rigidity (MMR), characterized by significant jaw muscle stiffness, is a recognized complication following succinylcholine administration that can complicate traditional approaches to securing an airway.
View Article and Find Full Text PDFIndian J Otolaryngol Head Neck Surg
February 2025
Basaksehir Cam and Sakura City Hospital, Başakşehir, Istanbul, Turkey.
Difficult airway management in oromaxillofacial tumor surgery poses significant challenges for anesthesiologists. We present two case reports of patients with mandibular malignant tumors and maxillary osteosarcoma who underwent surgery under general anesthesia. Preoperative assessment revealed a mass involving the right mandible, completely covering the inside of the mouth and invading the floor of the mouth in the first case, and a mass in the left maxilla extending to the zygomatic arch and orbital floor in the second case.
View Article and Find Full Text PDFIndian J Otolaryngol Head Neck Surg
February 2025
Department of Surgical Oncology, Sri Shanakara Cancer Hospital and Research Centre, Bangalore, India.
Objectives: To evaluate the effectiveness of the chimeric Free Anterolateral Thigh (FALT) and vastus lateralis muscle (VLM) flap for reconstructing extensive defects in advanced oral squamous cell carcinoma (OSCC), particularly those involving the infratemporal fossa (ITF) and masticator space.
Methods: A retrospective study was conducted at Sri Shankara Cancer Hospital, Bangalore, from January 2023 to June 2024. It included 22 patients with T4a and T4b OSCC who underwent curative ablative surgery, ITF clearance, and reconstruction using the chimeric FALT-VLM flap.
Indian J Otolaryngol Head Neck Surg
January 2025
Department of Radiation Oncology, Kasturba Medical College, Manipal, Karnataka India.
Trismus, or restricted mouth opening is a very common and often neglected side effect in oral and oropharyngeal malignancies owing to the disease itself as well as its treatment with surgery and/or chemoradiation. This study aims at assessing the prevalence of trismus occurring after complete treatment in diagnosed cases of oral and oropharyngeal malignancy and to assess various risk factors associated with development of trismus in these patients. A prospective, observational study conducted over a 2 years at a tertiary care hospital.
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