AI Article Synopsis
- The study aimed to assess changes in bone structure at the anterior site of the proximal segment post-surgery using a bent plate fixation in patients who underwent sagittal split ramus osteotomy (SSRO).
- 66 patients were analyzed, focusing on a specific area of overlapped cortical bone that was preserved during surgery to maintain stability between bone segments, with measurements taken both immediately after surgery and one year later using CT scans.
- Results showed that after one year, the ramus width and lateral cortex width had increased compared to pre-surgery levels, while the thickness of the overlapped cortical bone decreased, indicating successful bone remodeling despite the bone preservation.
Article Abstract
Purpose: The purpose of this study was to evaluate bony change in an overlapped cortical bone area at the anterior site of the proximal segment after modified plate fixation with a bent plate in sagittal split ramus osteotomy (SSRO).
Subjects And Methods: The subjects were 66 patients (132 sides) who underwent bilateral SSRO setback surgery. After the surgery in SSRO, an overlapped area of cortical bone at the anterior site of the proximal segment was not removed to keep the contact area between the proximal and distal segments intact, and was fixed with a bent plate and 4 screws in each side of the mandible. At the posterior site, a 3-7 mm gap was maintained between the proximal and distal segments to prevent inward-rotation of the condylar long axis. Ramus width, lateral cortex width and lateral cortex step angle were assessed in a coronal image immediately after the surgery, and 1-year postoperative by computed tomography (CT).
Results: Ramus width after 1-year was significantly larger than that before surgery and smaller than that immediately after surgery in both sides (P < 0.0001). Lateral cortex width after 1-year was significantly larger than the preoperative value and smaller than that immediately after surgery in both sides (P < 0.0001). Lateral cortex angle after 1-year was significantly larger than the preoperative value in both sides (P < 0.0001).
Conclusion: The above findings suggested that the overlapped cortical bone decreased thickness and the cortical bone step disappeared following favourable bone remodelling after 1-year, even though the cortical bone was not removed at the anterior site of the proximal segment.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jcms.2013.08.009 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The biomechanical implications of lacunar and perilacunar microarchitecture on microdamage accumulation in cortical bone.
Acta Bioeng Biomech
June 2024
3School of Mechanical Engineering, Yanshan University, Hebei, China.
: This study aimed to explore how the microarchitectural features of lacunae and perilacunar zones impact the biomechanics of microdamage accumulation in cortical bone, crucial for understanding bone disorders' pathogenesis and developing preventive measures. : Utilizing the phase field finite element method, the study analyzed three bone unit models with varying microarchitecture: one without lacunae, one with lacunae and one including perilacunar zones, to assess their effects on cortical bone's biomechanical properties. : The presence of lacunae was found to increase microcrack initiation risk, acting as nucleation points and accelerating microcrack propagation.
View Article and Find Full Text PDFExploration of the dynamics of otic capsule and intracochlear pressure: Numerical insights with experimental validation.
J Acoust Soc Am
January 2025
Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
The otic capsule and surrounding temporal bone exhibit complex 3D motion influenced by frequency and location of the bone conduction stimulus. The resultant correlation with the intracochlear pressure is not sufficiently understood, thus is the focus of this study, both experimentally and numerically. Experiments were conducted on six temporal bones from three cadaver heads, with BC hearing aid stimulation applied at the mastoid and classical BAHA locations across 0.
View Article and Find Full Text PDFImplant stability quotient and osteogenic process in dental implant sites prepared using piezoelectric technique: A study in minipigs.
J Prosthodont
January 2025
Department of Clinical and Biological Sciences, University of Turin, Turin, Italy.
Purpose: Few studies have explored the bone response in dental implant sites prepared using a piezoelectric device, indicating moderate effectiveness in enhancing secondary stability and osteogenesis. This study seeks to expand our understanding of the changes in biological, clinical, and radiographic parameters, during the initial phases of osseointegration in sites prepared with piezoelectric surgery.
Materials And Methods: Two implant sites were prepared in the tibia of four minipigs.
Diagnostic approach for the rare anterior variant of mandibular bone depression often misdiagnosed as tumorous lesions.
J Dent Sci
January 2025
Department of Oral and Maxillofacial Radiology, Yonsei University College of Dentistry, Seoul, Republic of Korea.
Background/purpose: This study analyzed the clinical and imaging features of lingual mandibular bone depression (LMBD) in the anterior mandible, aiming to prevent misdiagnosis and unnecessary surgical procedures.
Materials And Methods: The patients who visited a university dental hospital for painless radiolucency in the anterior mandible from January 2010 to December 2022 were retrospectively reviewed. Twelve cases of LMBD in the anterior mandible that are confirmed by biopsy or long-term follow-up were identified.
Using optimization approach to design dental implant in three types of bone quality - A finite element analysis.
J Dent Sci
January 2025
Department of Physical Therapy and Assistive Technology, National Yang Ming Chiao Tung University, Taipei, Taiwan.
Background/purpose: The use of finite element (FE) analysis in implant biomechanics offers many advantages over other approaches in simulating the complexity of clinical situations. The aim of this study was to perform an optimization analysis of dental implants with different thread designs in three types of bone quality.
Materials And Methods: The three-dimensional FE model of a mandibular bone block with a screw-shaped dental implant and superstructure was simulated.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!