Cílem článku je podělit se o naše zkušenosti se zhotovováním 3D modelů autotransplantovaných zubů a jejich vlastním použitím při výkonu. Zhotovení 3D repliky zubu pro chirurgické využití má tři fáze: tvorba virtuálního modelu repliky, výroba pomocí 3D tiskárny a sterilizace. Na naše oddělení byla doporučena 37letá zdravá pacientka k návrhu řešení stavu zubů ve II. kvadrantu. Po posouzení klinického stavu, zhodnocení CBCT (cone beam computed tomography) a po domluvě s pacientkou jsme se rozhodli pro extrakce zubů 26, 27 a následně autotransplantaci zubu 28 do místa 26. Na základě dat z CBCT jsme vytvořili dva 3D modely autotransplantovaného zubu a provedli jejich sterilizaci. Po extrakci zubů 26 a 27 jsme extrakční ránu 26 upravili za pomoci vytvořených 3D modelů a provedli autotransplantaci, přičemž extraalveorální čas zubu 28 byl pouze 21 vteřin. Hojení proběhlo bez komplikací a pacientka je s výsledkem spokojená. Autotransplantace je jednou z možností volby při řešení ageneze nebo ztráty zubu. Využití 3D modelu při operačním zákroku vede k výraznému zkrácení extraalveolárního času autotransplantátu a ke snížení nebezpečí poškození buněk periodontálního ligamenta opakovaným vkládáním autotransplantátu do připravované štoly.
The aim of this study is to show the experience with autotransplanted 3D model development and its use during surgery. The development of a 3D model has undergone three phases: building the virtual model, 3D printing and finally sterilisation. A 37-year-old female patient was recommended to our department for treatment of the 2nd quadrant. After planning the extraction of 26, 27 and consequently autotransplantation of tooth 28 was decided. According to CBCT data, two 3D models of the autotransplanted tooth were built and plasma sterilisation was done. After extraction of 26 and 27, a tooth cavity was prepared for the 3D model phantom and the autotransplantation was finished; extra alveolar time of tooth 28 was only 21 seconds. Healing period had no adverse problems and the patient was very satisfied with the result. Autotransplantation is one of the possible choices when treating malformation or tooth loss. The use of a 3D phantom during surgery leads to shortening of surgery time, thus lowering the risk of periodontal tissue damage by repeated testing of the right size of the tooth position and size.
- MeSH
- 3D tisk * MeSH
- autologní štěp klasifikace transplantace MeSH
- autologní transplantace * metody MeSH
- dospělí MeSH
- extrakce zubů metody MeSH
- lidé MeSH
- moláry transplantace MeSH
- počítačová tomografie s kuželovým svazkem metody MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
- práce podpořená grantem MeSH
OBJECTIVE: We propose a method utilizing mixed reality (MR) goggles (HoloLens 2, Microsoft) to facilitate impacted canine alignment, as planning the traction direction and force delivery could benefit from 3D data visualization using mixed reality (MR). METHODS: Cone-beam CT scans featuring isometric resolution and low noise-to-signal ratio were semi-automatically segmented in Inobitec software. The exported 3D mesh (OBJ file) was then optimized for the HoloLens 2. Using the Unreal Engine environment, we developed an application for the HoloLens 2, implementing HoloLens SDK and UX Tools. Adjustable pointers were added for planning attachment placement, traction direction, and point of force application. The visualization was presented to participants of a course on impacted teeth treatment, followed by a 10-question survey addressing potential advantages (5-point scale: 1 = totally agree, 5 = totally disagree). RESULTS: Out of 38 respondents, 44.7% were orthodontists, 34.2% dentists, 15.8% dental students, and 5.3% dental technicians. Most respondents (44.7%) were between 35 and 44 years old, and only 1 (2.6%) respondent was 55-64 years old. Median answers for six questions were 'totally agree' (25th percentile 1, 75th percentile 2) and for four questions 'agree' (25th percentile 1, 75th percentile 2). No correlation was found between age, profession, and responses. CONCLUSION: Our method generated substantial interest among clinicians. The initial responses affirm the potential benefits, supporting the continued exploration of MR-based techniques for the treatment of impacted teeth. However, the recommendation for widespread use awaits validation through clinical trials.
- MeSH
- augmentovaná realita MeSH
- dospělí MeSH
- lidé MeSH
- ověření koncepční studie MeSH
- plánování péče o pacienty * MeSH
- počítačová tomografie s kuželovým svazkem * metody MeSH
- software MeSH
- špičák diagnostické zobrazování MeSH
- zaklíněný zub * diagnostické zobrazování terapie MeSH
- zobrazování trojrozměrné * metody MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
PURPOSE: Anastomosis between posterior superior alveolar artery and infraorbital artery can go through bony canal in the lateral wall of the maxilla. This artery is called alveolar antral artery. It can complicate lateral sinus lift procedure by bleeding and hemosinus formation or bone graft wash out. The artery can also go in soft tissues where is not visible on cone beam computed tomography. In previous studies, the relation of this artery to sinus floor or alveolar process was measured. These structures are highly unstable during lifetime and after tooth loss. The aim of this study is to study presence and relations of bony canal in the lateral maxillary wall, to characterize the group of patients which is more likely to have bone canal in the lateral maxilla. The aim and the novelty of this study is the describing of the relationship of the bony canal to the more stable structure of hard palate and describing the relation of presence of bony canal on width of maxillary sinus, and to facilitate the prediction of presence of the alveolar antral artery. MATERIALS: The cone beam computed tomography scans of the patients (251 in number) of the university hospital were examined for presence of alveolar antral artery (148 was fulfilled inclusion criteria), patient were characterized by gender, age, and sinus type (wide, average, narrow). The diameter of the bony canal and its relation to the level of sinus floor and hard palate were measured. RESULTS: The cone beam computed tomography scans of 148 patients, out of it 55 man (37,2%) and 93 women (62,8%). Bony canal containing alveolar anastomosis was found in 69 cases (57,0%). Presence of the bony canal in the lateral wall of maxillae showed statistical probability depending on age with p = 0, 064 according to Mann-Whitney test. The older patients have more likely the bony canal. The presence of the alveolar antral artery was found more likely in the wide sinuses. The hard palate level can serve as a prediction point of alveolar antral artery only in first molar and second premolar region. In accordance with previous studies the width of bony canal is significantly higher in group of man (p = 0, 015). There was found a correlation between smaller distance of bony canal from sinus floor in the presence of teeth (p = 0, 067). After tooth loss the distance between sinus floor and bony canal increases, but the distance of bony canal to hard palate level stays constant. This can be explained hypothetically so that periodontal ligaments and root surface acts as a barrier for sinus pneumatization. CONCLUSION: Lateral sinus lifting in some cases can be unenviable, the knowledge about alveolar antral artery anatomy can reduce the risk of arterial bleeding. The cone-beam computed tomography is a routine examination prior to augmentation surgery and therefore the data obtained from it has an impact on clinical practice.
- MeSH
- arterie diagnostické zobrazování MeSH
- augmentace dna čelistní dutiny * MeSH
- lidé MeSH
- počítačová tomografie s kuželovým svazkem metody MeSH
- processus alveolaris diagnostické zobrazování MeSH
- ztráta zubů * MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- MeSH
- apikoektomie * metody přístrojové vybavení MeSH
- digitální zubní radiografie metody MeSH
- lidé středního věku MeSH
- lidé MeSH
- mikrochirurgie metody přístrojové vybavení MeSH
- osteotomie metody MeSH
- počítačová tomografie s kuželovým svazkem * metody přístrojové vybavení MeSH
- rentgendiagnostika zubní metody MeSH
- terapie kořenového kanálku metody MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
- MeSH
- diagnostické zobrazování metody MeSH
- lidé MeSH
- nemoci zubů diagnostické zobrazování klasifikace patologie MeSH
- počítačová tomografie s kuželovým svazkem metody MeSH
- radikulární cysta * diagnostické zobrazování diagnóza MeSH
- rentgendiagnostika panoramatická metody MeSH
- Check Tag
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
The goal of study was to explore the role of 3D CBCT (cone beam computer tomography) in detecting impacted canines and their movement to evaluate the influence of orthodontic therapy parameters on treatment options, and to monitor quality of healing process based on shape and size of sinus maxillae volume. It is known that the volume of maxillary sinus plays an important role in patients with impacted teeth. The prospective study consisted of 26 individuals. For each individual, pre-treatment and post-treatment CBCT data were acquired. Changes of size, and position of impacted canine in 3D CBCT image before and after therapy were prepared using 3D reconstruction. Volumetric measurements of the maxillary sinuses were performed before and after orthodontic therapy of impacted canines, using InVivo6 software. The main effects MANOVA performed on linear measurements showed metric differences between pre-op and post-op images. A paired t-test showed no statistically significant differences between pre-op and post-op values of the sinus volume. Changes of size and position of impacted canine in 3D image before and after therapy were precise and reproducible, using 3D reconstruction in three planes - horizontal, midsagittal, and coronal. The linear measurements showed metric differences between pre-op and post-op images.
- MeSH
- lidé MeSH
- počítačová tomografie s kuželovým svazkem metody MeSH
- prospektivní studie MeSH
- sinus maxillaris diagnostické zobrazování MeSH
- špičák diagnostické zobrazování MeSH
- zaklíněný zub * diagnostické zobrazování terapie MeSH
- zobrazování trojrozměrné metody MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
Aim: The presented study aim was to find out whether a cephalogram and a scan generated from 3D CBCT of one and the same patient are different or identical. Material and method: The retrospective study included 41 patients with complete orthodontic documentation with a cephalogram and a CBCT taken prior to treatment. The CBCT can be synthesized into cephalogram in orthogonal and perspective projections with Dolphin Imaging 11.95 Premium (Dolphin Imaging and Management Solutions, Chatsworth, CA, USA). Both scans were taken within one month. The same software was used for cephalometric analysis of cephalograms and CBCT generated scans. 7 angular and 3 linear parameters (including dental and skeletal parameters in sagittal and vertical planes) were selected for the study. Results: Statistically significant differences between scans made with three different techniques were found in the following parameters: angular dimension of SNB, and linear parameters WITS, U1-APo, L1-APo. Conclusion: The individual techniques differ to some extent. However, majority of differences in mean values was < 0.6° and < 0.7 mm which suggests that their significance is not important from clinical viewpoint. The techniques are comparable.
Aim: The aim was to find out the relationship between impacted lower second molars (MM2) and length and height of the mandible. Material and method: The retrospective study included 40 patients with unilateral impaction of MM2 (study group) and 40 patients without the impaction (control group). The patients have been treated at the Orthodontics of the Department of Stomatology, Second Faculty of Medicine, Charles University, and University Hospital in Motol, Prague. In all patients on CBCT scans the mandible length between the points gnation – gonion and the mandible height between the points condylion – gonion was measured on the side of impaction as well as on the opposite side. The software Dolphin Imaging 3D 11.95 Premium was used. Then the symmetry of both sides was assessed in each patient. The same method was used in the control group. Results: The length of the mandible on the side with impacted MM2 was significantly shorter than on the opposite non-impacted side (p < 0.0001); the difference in the mandible height was not significant (p = 0.830). The results are proved also by insignificant difference of lateral parameters of the mandible in the control group. Conclusion: The study proved that the mandible is significantly shorter on the side with impacted MM2, however, there is no clinically significant asymmetry.
- MeSH
- dítě MeSH
- kefalometrie metody přístrojové vybavení statistika a číselné údaje MeSH
- lidé MeSH
- mandibula * diagnostické zobrazování MeSH
- mladiství MeSH
- mladý dospělý MeSH
- moláry * diagnostické zobrazování patologie MeSH
- počítačová tomografie s kuželovým svazkem metody přístrojové vybavení MeSH
- retrospektivní studie MeSH
- zaklíněný zub diagnostické zobrazování epidemiologie MeSH
- Check Tag
- dítě MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
