Results of a comparison of the outcomes of treatment of cleft lip and palate can be affected by growth characteristics of populations from which subjects with the clefts are derived. Moreover, conventional cephalometric techniques used in cleft studies for analysis of facial morphology provide only a partial description of shape and are confounded by biases regarding the reference structures. In this retrospective comparison, craniofacial morphology of preadolescent patients with unilateral cleft lip and palate treated in Warsaw (n = 35, age = 10.6 years, SD = 1.2), Prague (n = 38, age = 11.6 years, SD = 1.4), and Bratislava (n = 26, age = 10.5 years, SD = 1.6) were evaluated on cephalograms with the cephalometric method used in the Eurocleft study and geometric morphometrics. We found that patients treated in Warsaw showed slightly more favorable outcomes than in Prague and Bratislava. The differences were related primarily to the position of maxillary alveolar process, cranial base, mandibular angle, and soft tissues. Although no association between a component of treatment protocol and the outcome was found, it is possible that organizational factors such as participation of high-volume, experienced surgeons contributed to these results.

• Klíčová slova
• Cephalometrics, Cleft lip, Cleft palate, Geometric morphometrics, Morphology, Slavs,
• MeSH
• dítě MeSH
• etnicita statistika a číselné údaje   MeSH
• kefalometrie statistika a číselné údaje   MeSH
• lidé MeSH
• mandibula patologie   MeSH
• maxila patologie   MeSH
• obličej anatomie a histologie   patologie   MeSH
• processus alveolaris patologie   MeSH
• retrospektivní studie MeSH
• rozštěp patra patologie   chirurgie   MeSH
• rozštěp rtu patologie   chirurgie   MeSH
• výsledek terapie MeSH
• Check Tag
• dítě MeSH
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• multicentrická studie MeSH
• Geografické názvy
• Česká republika MeSH
• Polsko MeSH
• Slovenská republika MeSH

INTRODUCTION: The aim of this study was to determine the reproducibility and accuracy of linear measurements on 2 types of dental models derived from cone-beam computed tomography (CBCT) scans: CBCT images, and Anatomodels (InVivoDental, San Jose, Calif); these were compared with digital models generated from dental impressions (Digimodels; Orthoproof, Nieuwegein, The Netherlands). The Digimodels were used as the reference standard. METHODS: The 3 types of digital models were made from 10 subjects. Four examiners repeated 37 linear tooth and arch measurements 10 times. Paired t tests and the intraclass correlation coefficient were performed to determine the reproducibility and accuracy of the measurements. RESULTS: The CBCT images showed significantly smaller intraclass correlation coefficient values and larger duplicate measurement errors compared with the corresponding values for Digimodels and Anatomodels. The average difference between measurements on CBCT images and Digimodels ranged from -0.4 to 1.65 mm, with limits of agreement values up to 1.3 mm for crown-width measurements. The average difference between Anatomodels and Digimodels ranged from -0.42 to 0.84 mm with limits of agreement values up to 1.65 mm. CONCLUSIONS: Statistically significant differences between measurements on Digimodels and Anatomodels, and between Digimodels and CBCT images, were found. Although the mean differences might be clinically acceptable, the random errors were relatively large compared with corresponding measurements reported in the literature for both Anatomodels and CBCT images, and might be clinically important. Therefore, with the CBCT settings used in this study, measurements made directly on CBCT images and Anatomodels are not as accurate as measurements on Digimodels.

• MeSH
• kefalometrie statistika a číselné údaje   MeSH
• lidé MeSH
• počítačová tomografie s kuželovým svazkem statistika a číselné údaje   MeSH
• počítačové zpracování obrazu statistika a číselné údaje   MeSH
• povrchové vlastnosti MeSH
• reprodukovatelnost výsledků MeSH
• software MeSH
• zobrazování trojrozměrné statistika a číselné údaje   MeSH
• zubní korunka (anatomie) anatomie a histologie   MeSH
• zubní modely * MeSH
• zubní oblouk anatomie a histologie   MeSH
• zubní technika otisková statistika a číselné údaje   MeSH
• zuby anatomie a histologie   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• srovnávací studie MeSH

INTRODUCTION: The process of fabricating physical medical skull models requires many steps, each of which is a potential source of geometric error. The aim of this study was to demonstrate inaccuracies and differences caused by DICOM to STL conversion in additively manufactured medical skull models. MATERIAL AND METHODS: Three different institutes were requested to perform an automatic reconstruction from an identical DICOM data set of a patients undergoing tumour surgery into an STL file format using their software of preference. The acquired digitized STL data sets were assessed and compared and subsequently used to fabricate physical medical skull models. The three fabricated skull models were then scanned, and differences in the model geometries were assessed using established CAD inspection software methods. RESULTS: A large variation was noted in size and anatomical geometries of the three physical skull models fabricated from an identical (or "a single") DICOM data set. CONCLUSIONS: A medical skull model of the same individual can vary markedly depending on the DICOM to STL conversion software and the technical parameters used. Clinicians should be aware of this inaccuracy in certain applications.

• Klíčová slova
• Additive-manufacturing, Bio-modelling, CBCT, DICOM, STL,
• MeSH
• algoritmy MeSH
• anatomické modely * MeSH
• design s pomocí počítače statistika a číselné údaje   MeSH
• kefalometrie statistika a číselné údaje   MeSH
• lebka anatomie a histologie   MeSH
• lidé MeSH
• mandibula anatomie a histologie   MeSH
• nosní dutina anatomie a histologie   MeSH
• orbita anatomie a histologie   MeSH
• počítačová tomografie s kuželovým svazkem statistika a číselné údaje   MeSH
• počítačové zpracování obrazu statistika a číselné údaje   MeSH
• povrchové vlastnosti MeSH
• radiologické informační systémy statistika a číselné údaje   MeSH
• sinus maxillaris anatomie a histologie   MeSH
• software MeSH
• zobrazování trojrozměrné statistika a číselné údaje   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• srovnávací studie MeSH

OBJECTIVE: The objective of this study is to evaluate whether manipulation of the nasal septum, its release, and changing of its abnormal position in infancy has an impact on maxillary growth and facial development in patients with unilateral cleft lip and palate. DESIGN: Roentgencephalometric investigation. SETTING: Cleft Centre at the Clinic of Plastic Surgery, Prague. PATIENTS: Two consecutive groups of male patients (n = 32 and 30) with complete unilateral cleft lip and palate without associated malformations at 15 years of age. INTERVENTIONS: The patients were operated on by the same team of surgeons and by the same method (lip: Tennison and primary periosteoplasty; palate: pushback with pharyngeal flap surgery), with the exception of complete primary repositioning of the nasal septum performed only in one group. MAIN OUTCOME MEASURES: Roentgencephalometric data of both series of patients were compared with a t-test. All measurements were performed by one investigator. RESULTS: Patients with primary repositioning of the nasal septum had a more favorable nasal prominence and better vertical growth of the upper and whole face in posterior height. Better growth in anterior height was only suggested; maxillary retrusion was equal in both groups. CONCLUSIONS: Primary repositioning of the nasal septum has a favorable effect on nasal development, and it neither deteriorates nor markedly improves maxillary growth in patients with unilateral cleft lip and palate.

• MeSH
• kefalometrie statistika a číselné údaje   MeSH
• lidé MeSH
• maxilofaciální vývoj * MeSH
• mladiství MeSH
• nosní přepážka chirurgie   MeSH
• radiografie MeSH
• rozštěp patra diagnostické zobrazování   patofyziologie   chirurgie   MeSH
• rozštěp rtu diagnostické zobrazování   patofyziologie   chirurgie   MeSH
• Check Tag
• lidé MeSH
• mladiství MeSH
• mužské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• srovnávací studie MeSH

In 92 patients with unilateral cleft lip and palate investigated on a long-term basis correlation-regression analysis of the development of overjet according to the development of interalveolar relations assessed in a defined method from X-ray films at the ages of 5, 10, 15 years and in adult age was implemented. The limits comprising 95% of the assembled data were also defined. Based on this analysis a formerly elaborated nomogram for age 10-15 years was extended for the whole postnatal period. Nomogram makes it possible to estimate from a single X-ray cephalometric parameter the risk of failure of the restoration of a positive overjet according to the age of the patient. The system defines critical boundaries which must be achieved for safe restoration of a positive overjet and makes it possible to check the course of treatment. The simple work with the nomogram and readily obtainable baseline data (age and X-ray cephalometric parameter on the interalveolar relations) make its application in clinical practice possible. It can serve as part of the documentation of the patient's therapy.

• MeSH
• dítě MeSH
• dospělí MeSH
• interval spolehlivosti MeSH
• kefalometrie statistika a číselné údaje   MeSH
• lidé MeSH
• malokluze patologie   terapie   MeSH
• mandibula patologie   MeSH
• maxila patologie   MeSH
• mladiství MeSH
• neúspěšná terapie MeSH
• patro patologie   MeSH
• předškolní dítě MeSH
• processus alveolaris patologie   MeSH
• regresní analýza MeSH
• řezáky patologie   MeSH
• rizikové faktory MeSH
• rozštěp patra patologie   chirurgie   MeSH
• rozštěp rtu patologie   chirurgie   MeSH
• věkové faktory MeSH
• zubní okluze * MeSH
• Check Tag
• dítě MeSH
• dospělí MeSH
• lidé MeSH
• mladiství MeSH
• mužské pohlaví MeSH
• předškolní dítě MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH