Accuracy of full-guided vs. pilot-guided implant insertion - A prospective laboratory study in fifth-year dental students.

Background: Education of undergraduates in implant dentistry has been extended. In order to assess the correct implant position, the accuracy of implant insertion using templates for pilot-drill guided and full-guided implant insertion was examined in a laboratory set-up in a cohort of undergraduates.

Methods: After three-dimensional planning of the implant position in partially edentulous mandibular models, individual templates for the pilot-drill guided or full-guided implant insertion in the region of the first premolar were produced.

Harmonisation of Dental Education in Europe - a survey about 15 years after visitation of dental schools participating in the DentEd project.

Introduction: The DentEd Thematic Networks (TNP) were funded from the EU to converge and harmonise the dental curricula. Forty-four dental schools participated in this visitation process between 1998 and 2002. The aim of the survey was to evaluate the implementation of the Dented outcomes in the curricula and if the concept of core competences are integrated in the curriculum.

Combining wrist age and third molars in forensic age estimation: how to calculate the joint age estimate and its error rate in age diagnostics.

Background: Forensic age estimation in living adolescents is based on several methods, e.g. the assessment of skeletal and dental maturation.

Bone density of the midpalatal suture 7 months after surgically assisted rapid palatal expansion in adults.

Introduction: The aims of this study were to analyze changes in bone density of the midpalatal suture after surgically assisted rapid palatal expansion (SARPE) with the bone-borne Dresden Distractor (DD; ITU, Dresden, Germany) via computed tomography (CT) and to compare of preoperative surgical findings with a control group.

Methods: Sixteen adult patients (mean age 24.5 years) underwent axial CT scans before and 7 months after SARPE.

Shear bond strength after multiple bracket bonding with or without repeated etching.

The purpose of the study was to measure the in vitro shear bond strength (SBS) of metal brackets after multiple bonding and debonding with and without repeated etching. One hundred and twenty extracted premolars were divided into three equal groups. In group 1, the brackets were bonded and debonded three times with repeated enamel etching and in groups 2 and 3 without repeated etching.

Changes in nasal volume after surgically assisted bone-borne rapid maxillary expansion.

Introduction: The purposes of this study were to detect, locate, and examine the changes in transverse nasal width, area, and volume from bone-borne, surgically assisted rapid maxillary expansion (SARME) with the Dresden distractor by using computer tomography (CT).

Methods: Sixteen patients (average age, 28.7 years) underwent axial CT scanning before and 6 months after SARME.

Developmental myosin heavy chain mRNA in masseter after orthognathic surgery: a preliminary study.

Introduction: A microarray study showed an increase of developmental myosin heavy chain (MyHC) mRNA in the masseter muscle after surgery. The aim of the study was to determine the expression of the embryonic MYH3 and perinatal MYH8 for use as potential marker for muscle adaptation after orthognathic surgery.

Material And Methods: 24 adult patients with a prognathic (11) or retrognathic (13) mandible were involved in the study.

Minimally invasive rapid palatal expansion with an implant-supported hyrax screw.

Rapid palatal expansion is indicated in the orthopedic treatment of transverse maxillary deficiency for correction of severe crossbite. The fixation of the appliance at the tooth crowns leads to more tipping connected with resorptions at the buccal cortical bone, fenestrations and gingival retraction. The aim of the present study was focused on the improvement of bodily movement and optimization of the surgical osteotomy (Glassman's technique) in adult patients with application of the Dresden Distractor (DD).

CT analysis of nasal volume changes after surgically-assisted rapid maxillary expansion.

Objective: Aim of this study was to detect the changes in nasal volume due to bone-borne, surgically-assisted rapid palatal expansion (RPE) with the Dresden Distractor using computed tomography (CT).

Materials And Methods: 17 patients (mean age 28.8) underwent axial CT scanning before and 6 months after RPE.

Incisor inclination--risk factor for palatally-impacted canines.

Objective: The purpose of this study was to evaluate the torque of upper incisors and the maxillary size in sagittal direction in patients with impacted canines.

Material And Methods: Panoramic radiographs, cephalograms and pretreatment study models were evaluated in 199 patients (12.7 +/- 3.

Autotransplantation of first premolar to replace a maxillary incisor - 3D-volume tomography for evaluation of the periodontal space.

Unlabelled: The anterior maxilla is the most traumatized region during childhood and tooth loss is frequently involved. Space closure with implants is contraindicated in growing patients and maintenance of space is necessary over a long period. Transplantation of premolars from the mandible with two-third to three-quarter root formation wide open foramen provides the best prognosis for permanent survival.

MGF- and myostatin-mRNA regulation in masseter muscle after orthognathic surgery.

Patients with prognathism and retrognathism show extensive morphologic changes after orthognathic surgery. The inability of muscles to adapt adequately might be one reason for observed relapses. The aim of this prospective study was to analyze the regulation of functional genes after surgery and changes in myosin heavy chain (MyHC) isoform expression, a potential molecular marker profile for inadequate muscle adaptation.

[Bone-supported rapid maxillary expansion with an implant-borne Hyrax screw: the Dresden Distractor].

Rapid palatal expansion is indicated in the orthopedic treatment of transverse maxillary deficiency for correction of severe crossbite. The fixation of the appliance at the teeth crowns leads to more tipping at the two halves of the maxilla than bodily transverse movement. Additional resorptions at the buccal cortical bone with fenestrations and gingival retraction were observed.

Treatment of a patient with Class II malocclusion, impacted maxillary canine with a dilacerated root, and peg-shaped lateral incisors.

The maxillary canines are important teeth in terms of esthetics and function. This case report describes the orthodontic treatment of a 12-year-old girl whose Class II malocclusion was complicated by an impacted maxillary canine and peg-shaped lateral incisors. Despite dilaceration of the root, the impacted canine was brought into alignment.

Spontaneous tooth eruption after alveolar cleft osteoplasty using tissue-engineered bone: a case report.

To bridge the cleft in the alveolar bone and to allow for physiologic eruption of the canine teeth, alveolar bone grafting is often necessary in patients with cleft lips and palates. Instead of autogenous bone, biomaterial seeded with autogenous osteogenic cells has found some clinical application. However, so far no real functional proof has been available to demonstrate that this technique also allows further physiologic features such as tooth eruption to occur.

Orthodontic space opening in patients with congenitally missing lateral incisors.

Objective: To determine the best time to begin orthodontic treatment for patients scheduled for implants to replace congenitally missing upper lateral incisors. The aim of timing is to maximize the amount of bone available for implant insertion and to improve incisors inclination.

Materials And Methods: Seventy-three plaster casts of 14 patients with 26 missing lateral incisors were cross sectioned in the center of the planned insertion of the implant, and the implant profile was projected into the area at three different times: T1--beginning of orthodontic treatment, T2-- end of orthodontic treatment, and T3--implant insertion.

Three-dimensional evaluation of surgically assisted implant bone-borne rapid maxillary expansion: a pilot study.

Introduction: The purpose of this study was to evaluate 3-dimensional changes in dental, alveolar, and skeletal structures caused by a bone-borne implant-supported rapid maxillary expansion device (Dresden distractor).

Methods: Axial computed tomography scans of 10 patients (mean age, 25.3 years) treated with the Dresden distractor were examined.

Skeletally-anchored rapid maxillary expansion using the Dresden Distractor.

Introduction: It was the aim of this study to carry out a 3-D analysis of the teeth, alveolar and skeletal structures during bone-borne, surgically-assisted rapid maxillary expansion (RME) with the Dresden Distractor (DD). We aimed to determine whether a translatory and skeletal movement of the segments would be possible while reducing the dento-alveolar side effects associated with tooth-borne RME.

Materials And Methods: Standardized axial computed tomography (CT) was performed on twelve patients averaging 25.

Prevalence of malocclusions in the early mixed dentition and orthodontic treatment need.

Early interceptive treatment for the elimination of factors inhibiting dental arch development and mandibular and maxillary growth is applied varyingly by orthodontists, possibly because there is little scientific evidence that such interventions are of actual benefit. The aim of this study was to determine specific factors for treatment need in the early mixed dentition period in order to obtain basic data to support early intervention. The study was part of a larger survey of 8768 children aged between 6 and 17 years.

A 2-center comparison of orthodontist's perceptions of orthodontic treatment difficulty.

The aim of this study was to determine which factors correlate with easy and difficult treatments and to assess the use of the Index of Complexity, Outcome & Need (ICON) as an indicator for treatment difficulty. The study was conducted at 2 centers using a retrospective cross-sectional questionnaire-based design. The participants were specialist orthodontic practitioners in Dresden, Germany and Cardiff, UK.