INTRODUCTION: The primary aim of this study was to assess the amount and long-term stability of orthodontically created bone in patients with agenesis of maxillary lateral incisors after canine distalization. The secondary aim was to explore the impact of patient age on the process of alveolar bone resorption. METHODS: A group of patients with agenesis of the maxillary permanent lateral incisor was examined at 4 time points: the beginning of orthodontic treatment (T1, n = 80), the end of treatment (T2, n = 80), 2-5 years after treatment (T3, n = 79), and 12-15 years after treatment (T4, n = 32). The width of the edentulous alveolar bone was measured from study casts at the level of the bone ridge (point A) and 5 mm apically from the alveolar ridge (point B). Alveolar ridge height was also recorded using panoramic radiographs at all time points. Paired t tests, 2-sample t tests, Friedman test with Bonferroni correction, Spearman`s correlation, and linear regression tests were used to analyze the data. RESULTS: The alveolar ridge width was reduced by an average of 0.44 mm at point A and 0.47 mm at point B during the 12-15 years after treatment (T2-T4) and by 0.21 mm and 0.19 mm during the last 10 years (T3-T4). The alveolar ridge height was reduced by 0.59 mm between T2 and T4 and by 0.05 mm between T3 and T4. All reductions in ridge width and height were statistically significant (P <0.05). However, no significant correlation was observed between patient age and changes in alveolar bone parameters (P >0.05). CONCLUSIONS: Although the reductions in alveolar ridge dimensions were statistically significant, the orthodontically created bone after canine distalization remained stable 12-15 years after treatment in both the horizontal and vertical dimensions. Patient age did not significantly influence alveolar bone changes.
- MeSH
- anodoncie * terapie diagnostické zobrazování MeSH
- čelist bezzubá MeSH
- dítě MeSH
- dospělí MeSH
- lidé MeSH
- maxila * MeSH
- mladiství MeSH
- mladý dospělý MeSH
- následné studie MeSH
- osteogeneze fyziologie MeSH
- posun zubů * metody MeSH
- processus alveolaris * diagnostické zobrazování patologie abnormality MeSH
- rentgendiagnostika panoramatická MeSH
- resorpce alveolární kosti diagnostické zobrazování MeSH
- řezáky * abnormality diagnostické zobrazování MeSH
- věkové faktory MeSH
- Check Tag
- dítě MeSH
- dospělí MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Klíčová slova
- jednokřídlé adhezivní můstky,
- MeSH
- anodoncie terapie MeSH
- dítě MeSH
- index potřeby ortodontické léčby MeSH
- lidé MeSH
- mladiství MeSH
- ortodontické uzavření mezery * metody MeSH
- processus alveolaris růst a vývoj MeSH
- řezáky * patofyziologie zranění MeSH
- ztráta zubů psychologie terapie MeSH
- zubní náhrady částečné MeSH
- Check Tag
- dítě MeSH
- lidé MeSH
- mladiství 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
BACKGROUND: The rate of reparative osteogenesis controls when an implant is sufficiently stable as to allow functional loading. Using a mini pig model, the rate of reparative osteogenesis in two types of implant sites for example, an osteotomy versus a fresh extraction socket were compared. METHODS: Eight adult mini pigs were used for the study. In phase I, three premolars were extracted on one side of the oral cavity; 12 weeks later, in phase II, osteotomies were produced in healed extraction sites, and contralateral premolars were extracted. Animals were sacrificed 1, 5, and 12 weeks after phase II. Bone repair and remodeling were evaluated using quantitative micro-computed tomographic imaging, histology, and histochemical assays coupled with quantitative dynamic histomorphometry. RESULTS: One week after surgery, extraction sockets and osteotomy sites exhibited similar patterns of new bone deposition. Five weeks after surgery, mineral apposition rates (MARs) were elevated at the injury sites relative to intact bone. Twelve weeks after surgery, the density of new bone in both injury sites was equivalent to intact bone but quantitative dynamic histomorphometry and cellular activity assays demonstrated bone remodeling was still underway. CONCLUSIONS: The mechanisms and rates of reparative osteogenesis were equivalent between fresh extraction sockets and osteotomies. The volume of new bone required to fill a socket, however, was significantly greater than the volume required to fill an osteotomy. These data provide a framework for estimating the rate of reparative osteogenesis and the time to loading of implants placed in healed sites versus fresh extraction sockets.
- MeSH
- endoseální implantace zubů metody MeSH
- extrakce zubů metody MeSH
- miniaturní prasata MeSH
- prasata MeSH
- premolár chirurgie MeSH
- remodelace kosti MeSH
- zubní implantáty * MeSH
- zubní lůžko * diagnostické zobrazování chirurgie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Klíčová slova
- skořápková technika,
- MeSH
- augmentace alveolárního výběžku * metody přístrojové vybavení MeSH
- biokompatibilní materiály MeSH
- dospělí MeSH
- fraktury zubů chirurgie terapie MeSH
- implantace zubů metody přístrojové vybavení MeSH
- lidé středního věku MeSH
- lidé MeSH
- processus alveolaris chirurgie patologie MeSH
- rentgendiagnostika zubní MeSH
- resorpce alveolární kosti chirurgie MeSH
- stomatochirurgické předprotetické výkony metody přístrojové vybavení MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- Publikační typ
- kazuistiky MeSH
- MeSH
- adherence a compliance při léčbě MeSH
- avulze zubu chirurgie diagnostické zobrazování etiologie terapie MeSH
- dospělí MeSH
- lidé MeSH
- neúspěšná terapie MeSH
- počítačová tomografie s kuželovým svazkem MeSH
- processus alveolaris chirurgie zranění MeSH
- rentgendiagnostika zubní MeSH
- replantace zubu * metody přístrojové vybavení škodlivé účinky MeSH
- resorpce zubního kořene * diagnostické zobrazování etiologie MeSH
- stomatochirurgické výkony metody přístrojové vybavení škodlivé účinky MeSH
- terapie kořenového kanálku metody přístrojové vybavení MeSH
- úrazy zubů chirurgie diagnostické zobrazování etiologie terapie MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
- Klíčová slova
- systém CEREC,
- MeSH
- augmentace alveolárního výběžku metody MeSH
- dentin MeSH
- design pilíře zubního implantátu metody přístrojové vybavení MeSH
- lidé MeSH
- zubní implantáty jednotlivých zubů MeSH
- zubní implantáty MeSH
- zubní lůžko transplantace MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
FASL (CD178) is known for its role in triggering apoptosis, mostly in relation with immune cells but additional functions have been reported more recently, including those in bone development. Examination of postnatal FasL-deficient mice (gld) showed an increased bone deposition in adult mice when compared with wild types. However, a different phenotype was observed prenatally, when the gld bone was underdeveloped. The aim of the following investigation was to evaluate this indication for an growth-dependent bone phenotype of gld mice and to search for the 'switch point'. This study focused on the mandibular/alveolar bone as an important structure for tooth anchorage. In vivo micro-computed tomography (CT) analysis was performed at different stages during the first month (6, 12 and 24 days) of postnatal bone development. In 6-day-old gld mice, a decrease in bone volume/tissue volume (BV/TV), trabecular thickness and trabecular number was revealed. In contrast, the 12-day-old gld mice showed an increased BV/TV and trabecular thickness in the alveolar bone. The same observation applied for bone status in 24-day-old gld mice. Therefore, changes in the bone phenotype occurred between day 6 and 12 of the postnatal development. The switch point is likely related to the changing proportion of bone cells at these stages of development, when the number of osteocytes increases. Indeed, the immunohistochemical analysis of FASL localized this protein in osteoblasts, whereas osteocytes were mostly negative at examined stages. The impact of FASL particularly on osteoblasts would agree with an earlier in vivo observed effect of FASL deficiency on expression of Mmp2, typical for osteoblasts, in the gld mandibular/alveolar bone. Notably, an age-dependent bone phenotype was reported in Mmp2-deficient mice.
- MeSH
- ligand Fas fyziologie MeSH
- mandibula anatomie a histologie diagnostické zobrazování růst a vývoj MeSH
- matrixová metaloproteinasa 2 metabolismus MeSH
- myši inbrední ICR MeSH
- processus alveolaris anatomie a histologie diagnostické zobrazování růst a vývoj MeSH
- rentgenová mikrotomografie MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
V tomto článku popisujeme inovační bolusovou techniku, která umožnila úspěšné přihojení kožního štěpu ke spodině dutiny ústní v případě, kdy nebyly k dispozici zuby a alveolus pro ukotvení.
In this report, we describe an innovative bolstering technique that resulted in successful skin graft take to the floor of the mouth when the teeth and alveolus were unavailable for anchorage.
- MeSH
- lidé středního věku MeSH
- lidé MeSH
- processus alveolaris chirurgie MeSH
- šicí techniky MeSH
- transplantace kůže * metody MeSH
- ústa * chirurgie MeSH
- ústní sliznice chirurgie MeSH
- výsledek terapie MeSH
- zuby chirurgie MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
