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Three-dimensional quantitative temporomandibular joint changes in skeletal class I malocclusion treated with extraction and non-extraction protocols: a comparative study of fixed orthodontic appliances and clear aligners.
Prog Orthod
January 2025
Department of Orthodontics, School and Hospital of Stomatology, China Medical University, Shenyang, 110002, P.R. China.
Objective: This study aimed to evaluate the positional and morphological changes in the temporomandibular joint (TMJ) in adult patients with skeletal Class I malocclusion treated with fixed orthodontic appliances (FAs) and clear aligners (CAs), both with and without premolar extractions.
Methods: This retrospective study involved 120 adult patients divided into non-extraction and extraction groups, each further subdivided equally into those treated with FAs and CAs. Cone beam computed tomography (CBCT) was used to assess the TMJ measurements before (T0) and after treatment (T1).
Background: This study aims to automate the measurement process of posterior condylar offset ratio (PCOR) and anterior condylar offset ratio (ACOR) to improve the Total Knee Arthroplasty (TKA) evaluation. Accurate calculation of PCOR and ACOR, performed manually by orthopedic surgeons, is crucial for assessing postoperative range of motion and implant positioning. Manual measurements, however, are time-consuming, prone to human error, and subject to variability.
View Article and Find Full Text PDFInfluences of patient positioning and general anesthesia on condylar position and surgical accuracy in orthognathic surgery.
Clin Oral Investig
January 2025
Department of Oral and Maxillofacial Surgery, Radboud University Medical Center, Geert Grooteplein 10, Nijmegen, 6525, GA, the Netherlands.
Objectives: To assess the effect of patient positioning and general anesthesia on the condylar position in orthognathic surgery.
Materials And Methods: This prospective study included patients undergoing orthognathic surgery between 2019 and 2020. Four weeks prior to surgery (T0) cone-beam computed tomography (CBCT) scans and intra-oral scans (IOS) were acquired in an upright position.
Comparison of Patient-Specific Plates and Pre-Bent Plates for Preserving Condylar Position in Mandible Reconstruction.
J Craniofac Surg
November 2024
Department of Oral and Maxillofacial Surgery, Yonsei University College of Dentistry, Seoul, Korea.
Objectives: To compare the efficacy of patient-specific 3-dimensional (3D)-printed plates (PSP) and pre-bent universal reconstruction plates (PBP) in preserving the 3D position of the mandibular condyle and total operation time during mandibular reconstruction with a fibula-free flap.
Materials And Methods: This retrospective study included 18 patients who underwent mandibular reconstruction using fibular free flaps. Both groups utilized virtual surgical planning (VSP) and 3D-printed surgical guides.
Orthognathic surgery-related condylar resorption in patients with skeletal class III malocclusion versus class III malocclusion: a systematic review and meta-analysis.
BMC Oral Health
January 2025
School of Dentistry, Complutense University of Madrid, Madrid, 28040, Spain.
Background: Orthodontic-orthognathic treatment is the standard of care for moderate and/or severe skeletal class III (SCIII) malocclusion. Following orthognathic surgery, morphological changes in the temporomandibular joint structures (TMJ) may contribute to condylar resorption (CR).
Objectives: This systematic review aimed to identify the morphological signs of condylar resorption (changes in the condylar head, position, neck, disk, and joint space) following orthognathic surgery in patients with SCIII compared with those with skeletal class II (SCII) malocclusion.
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