[Surgery first. Principles, advantages and disadvantages]
Ortodonticko-chirurgícká léčba skeletálních vad je jednou z nejsložitějších, ale zároveň nejzajímavějších částí ortodoncie. Koncept „Surgery First" je nový postuo, kterv se svou podstatou liší od tradiční standardní kombinovaně terapie. Pacient hned na začátku léčby podstupuje ortognátní operaci, která harmonizuje skeletální vztahy. Původní malokluze je při operaci nahrazena malokluzí novou, která je následné řešena ortodonticky. Absence fáze dekompenzace, okamžitá změna profilu a výrazně kratší doba léčby jsou hlavní přednosti Surgery First ve srovnání se standardní kombinovanou terapií. Cílem sdělení je představit nový terapeutický postup a uvést jeho výhody, nevýhody, indikace a kontraindikace.
Orthodontic-surgical management of skeletal anomalies is one of the most complex and interesting parts of orthodontics. „Surgery First" concept is a new orthognathic approach, the core of which is different from the traditional standard combined therapy. At the very beginning of their treatment the patients undergo orthognathic surgery to harmonize skeletal relationships. The original malocclusion is substituted with the new one thai is subsequently solved orthodontically. The absence of decompensation phase, immediate modification of a patient's profile, and significantly shorter treatment time represent the main advantages of the „Surgery First" approch compared to the standard combined therapy. I he aim of the report is to introduce this new therapeutic method, and discuss its advantages, disadvantages, indications and contraindications.
OBJECTIVE: This study aimed (1) to determine whether scanner arm rotation causes significant movement of the head restraint and (2) to measure patient movement and its variation during the scan. STUDY DESIGN: The iCAT scanner and a high-speed camera were used. The 40 patients were divided into 2 groups: the open-eyed group and the blindfolded group. RESULTS: The mean level of head restraint movement was 0.130 mm, with a significantly higher level at the beginning, probably owing to the accelerating arm. Mean movement of patients was 1.135 mm and 1.119 mm in the open-eyed and blindfolded groups, respectively. Patient movement was also significantly higher at the beginning of the scan, when noise and vibrations are likely to surprise the patient. CONCLUSIONS: Patient instruction and a dry-run scan should be done by clinicians. Manufacturers should consider separating the seat and head restraint from the rest of the scanner to avoid vibration transfer.
- MeSH
- artefakty MeSH
- audiovizuální záznam MeSH
- fyzické omezení metody MeSH
- hluk MeSH
- lidé MeSH
- počítačová tomografie s kuželovým svazkem * MeSH
- pohyb * MeSH
- prospektivní studie MeSH
- vibrace MeSH
- zrak MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- randomizované kontrolované studie MeSH
Role cone-beam CT (CBCT) v zobrazovacích metodách ústní a maxilofaciální oblasti je dobře známá. Jedním z hlavních problémů, které zbývá vyřešit, je nechtěný pohyb pacienta během skenování. V první části sdělení je nastíněna problematika vlivu pohybu pacienta na kvalitu obrazu. V druhé části předkládáme původní řešení, jak pohyb pacienta sledovat a jak následně eliminovat jeho negativní vliv na rozlišení CBCT skenu.
The role of cone-beam computed tomography (CBCT) in imaging of the oral and maxillofacial region is well known. One of the biggest problems remaining to be solved is the unwanted movement of the patient during the scanning procedure. In the first part we discuss its influence on image quality. In the second part we present original method how to monitor patient movement and how to eliminate its negative influence on resolution of CBCT scan.
- MeSH
- artefakty MeSH
- lidé MeSH
- nemoci úst diagnóza radiografie MeSH
- počítačová tomografie s kuželovým svazkem normy MeSH
- pohyb účinky záření MeSH
- rentgenový obraz - interpretace počítačová * metody přístrojové vybavení MeSH
- zobrazování trojrozměrné * metody trendy využití MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- práce podpořená grantem MeSH
- MeSH
- kurzy a stáže v nemocnici * MeSH
- lidé MeSH
- ortodoncie korekční metody MeSH
- ortognátní chirurgické výkony * metody MeSH
- Check Tag
- lidé MeSH
- Geografické názvy
- Japonsko MeSH
- O autorovi
- Sugawara, Junji Autorita
Bilateral sagittal split osteotomy (BSSO) aims to correct congenital or acquired mandibular abnormities. Temporary or permanent neurosensory disturbance is the most frequent complication of BSSO. To evaluate the influence of IAN handling during osteotomy, the authors undertook a prospective study in 290 patients who underwent BSSO. The occurrence and duration of paresthesia was evaluated 4 weeks, 3 months, 6 months, and 1 year after surgery. Paresthesia developed immediately after surgery in almost half of the patients. Most cases of paresthesia resolved within 1 year after surgery. A significantly higher prevalence of paresthesia was observed on the left side. The authors found a correlation between the type of IAN position between the left and right side. The type of split (and IAN exposure) did not have a significant effect on the occurrence or duration of neurosensory disturbance of the IAN. The authors did not find a correlation between the occurrence and duration of paresthesia and the direction of BSSO. Mandibular hypoplasia or mandibular progenia did not represent a predisposition for the development of paresthesia. In the development of IAN paresthesia, the type of IAN exposure and the split is less important than the side on which the split is carried out.
- MeSH
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- malokluze chirurgie MeSH
- mandibula anatomie a histologie chirurgie MeSH
- mladiství MeSH
- mladý dospělý MeSH
- následné studie MeSH
- neparametrická statistika MeSH
- nervus mandibularis anatomie a histologie MeSH
- parestezie etiologie prevence a kontrola MeSH
- pooperační komplikace prevence a kontrola MeSH
- poranění trojklaného nervu prevence a kontrola MeSH
- prospektivní studie MeSH
- sagitální osteotomie větve dolní čelisti škodlivé účinky metody MeSH
- techniky fixace čelistí škodlivé účinky MeSH
- výsledek terapie MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- klinické zkoušky MeSH
- práce podpořená grantem MeSH
The role of cone beam computed tomography (CBCT) in imaging of the oral and maxillofacial region is well known and its indications and possibilities are still increasing. More sophisticated technologies are being developed each year, mainly providing higher resolution, bigger field of view, faster scanning and better scatter reduction. One of the major problems remaining to be solved is the unwanted movement of the patient during the scanning procedure. All hardware solutions that have been developed to fix the patient's head in a steady position have their limits. For example, they cannot eliminate small movements caused by breathing, heartbeat, and swallowing. We have developed a simple method to improve these CBCT images. The movement of the scanned object is monitored with marks attached to it. These marks are identified on every 2D image captured during the scanning procedure and used to unify the position of these 2D images. The final 3D reconstruction produces a sharper 3D data set with higher resolution and reduced blur. In conclusion, this simple method has the potential to improve the quality of CBCT scans.
