POSTOPERATIVE FIXATION AFTER REPOSITIONING OF PREMAXILLA IN A PATIENT WITH BILATERAL CLEFT LIP AND PALATE - CASE REPORT.

This article presents orthodontic-surgical treatment in an eight-year-old patient with bilateral cleft lip and palate where premaxilla was surgically repositioned in the mixed dentition stage. By cranial and dorsal insertion of the premaxilla were created satisfactory occlusal relationship for ongoing eruption of permanent teeth, together with functional lip closure, improved pronunciation and a positive change in appearance of the centrofacial area. Reposition of premaxilla was associated with bilateral alveolar bone grafting of the cleft defect with cancellous bone from the iliac crest. Based on the model surgery were prepared rigid orthodontic wires, which ensured postoperative fixation of the segments of the upper jaw. The patient was wearing band fixed appliance for another 6 months after surgery. Healing was uncomplicated, the new position of the premaxilla was stable and more physiological. This procedure was friendly for a child patient and did not require fixation of the jaw segments by Sauer splint.

Using three-dimensional digital models to establish alveolar morphotype.

BACKGROUND: The aim of the study was to propose a classification of alveolar morphotype and assess a relationship between extraction/non-extraction orthodontic treatment and changes to the alveolar process. MATERIALS AND METHODS: Seventy-five subjects (mean age = 23.2, SD = 5.1) were selected. Areas of the sections of the alveolar process (ASAP) at three different levels (0, 2, and 4 mm) were measured on pre- and post-treatment three-dimensional digital models. Method reliability was analysed using Dahlberg's formula, intraclass correlation coefficient, and paired t-tests. RESULTS: The mean ASAP was smallest at level 0 and largest at level 4. Pre-treatment ASAP < 773 mm2, < 863.9 mm2, and < 881.1 mm2 at levels 0, 2, and 4 mm, respectively, should be described as a "thin" alveolar morphotype. Regression models showed that pre-treatment ASAP was a predictor of the change of the alveolus during treatment only at level 2. CONCLUSIONS: Patients for whom pre-treatment ASAP is < 773 mm2, < 863.9 mm2, and < 881.1 mm2 at levels 0, 2, and 4 mm, respectively, should be described as having a "thin" alveolar morphotype. In these patients, extraction treatment, associated with a decrease in the alveolus area, should be exercised with caution.

The incidence of cleft lip and palate in the Czech Republic in 1994-2008.

OBJECTIVE: To determine the incidence of nonsyndromic cleft lip and/or palate in the Czech Republic among infants born during 1994-2008 as well as to define the ratio per live births and sex ratios. Another aim was to determine whether there was any trend in the incidence in this time period. DESIGN: Retrospective study. SETTING: Prague Center for the Treatment of Congenital Facial Anomalies. MATERIAL AND METHODS: Data were collected from the National Birth Defects Register (Institute of Health Information and Statistics), the Czech Statistical Office and the Czech Health Statistics Yearbooks. The incidence, ratios per live births and sex differences were calculated. Possible trends in the data series were investigated. RESULTS: Totally 2417 infants with a cleft defect were found among 1 471 789 newborns in time period 1994-2008. The overall incidence was 1.64 per 1000 live births or 1 in 600 live births. The incidence of cleft lip was 0.39/1000, the incidence of cleft palate was 0.68/1000 and the incidence of cleft lip and palate was 0.57/1000. The ratio per live births was 1 in 2648 in cleft lip, 1 in 1801 in cleft lip and palate and 1 in 1505 in cleft palate. The incidence was much higher among male babies in cleft lip patients (male to female ratio 2.07) and in patients with cleft lip and palate (males to females ratio 1.85). The male to female ratio in cleft palate newborns was 0.92. No traceable trend was found in the incidence. CONCLUSIONS: In the Czech Republic, every year approximately 170 infants with cleft lip and/or palate were born, the incidence was 1.64 per 1000 live born infants during considered period. Males were affected more frequently with isolated cleft lip and cleft lip and palate, on the other hand, in cleft palate patients, there was a slight dominance of females. Further long-term studies are necessary in order to elucidate reasons of the oscillations in incidence of cleft anomalies, to identify possible teratogens and to give a starting indication for planning health service resource requirements for this group of affected infants (Tab. 3, Fig. 4, Ref. 51).

The WEB 2.0 induced paradigm shift in the e-learning and the role of crowdsourcing in dental education.

OBJECTIVES: Authors evaluated the effect of the WEB 2.0 environment on dental education and estimated the difference in retention of knowledge by cephalometric analysis in orthodontics between conventional education and off-line e-learning. BACKGROUND: Five years of experience with complex web-based e-learning system allowed the evaluation by retrospective analysis and on-line questionnaire. RESULTS: The results revealed the current trends in on-line behavior of students based on the WEB 2.0 innovative technologies like Ajax. Results confirmed an increasing number of resources with a rising frequency of e-learning materials. CONCLUSION: The study confirmed that e-learning of the same subject is more efficient in immediate examination after the lecture with even better results after 12 and 24 months against the control group (Tab. 3, Fig. 1, Ref. 26).