Measurements using orthodontic analysis software on digital models obtained by 3D scans of plaster casts : Intrarater reliability and validity.

Objective: The purpose of this work was to determine the reliability and validity of measurements performed on digital models with a desktop scanner and analysis software in comparison with measurements performed manually on conventional plaster casts.

Materials And Methods: A total of 20 pairs of plaster casts reflecting the intraoral conditions of 20 fully dentate individuals were digitized using a three-dimensional scanner (D700; 3Shape). A series of defined parameters were measured both on the resultant digital models with analysis software (Ortho Analyzer; 3Shape) and on the original plaster casts with a digital caliper (Digimatic CD-15DCX; Mitutoyo).

Structural color changes in permanent enamel of patients with cleft lip and palate: a case-control study.

Objectives: White spots are more common in patients with cleft lip and palate (CLP) than in the normal population. Whether these are due to the cleft itself or concomitant circumstances (e.g.

Orthodontic treatment need in a representative adult cohort.

Background And Objective: There is currently no representative information for central Germany on the prevalence of dental malalignments and jaw discrepancies in permanent dentition. The aim of this study was to describe the extent of tooth and jaw malformations in a representative adult population according to conventional orthodontic indices.

Subjects And Methods: Three dimensionally (3D)-oriented study casts were measured from a representative sample of adults from the Halle and Leipzig urban areas consisting of 102 men and 143 women aged between 18 and 39 years, yielding a total of 245 volunteers.

Assessment of quality of life in patients undergoing orthognathic surgery.

Clinical Question: Analysis to date on the impact of a pronounced skeletal dentofacial deformity on quality of life remains inadequate.

Objective: The objective of this study was to introduce a validated and internationally comparable questionnaire for the assessment of quality of life, and to use this questionnaire in a consecutively-selected patient cohort.

Material And Methods: The Orthognathic Quality of Life Questionnaire (OQLQ) used internationally was translated into German and adapted in accordance with EU guidelines (OQLQ-G).

Effects of different brazing and welding methods on the fracture load of various orthodontic joining configurations.

Purpose: The aim of this study was to compare the fracture load of different joints made by conventional brazing, tungston inert gas (TIG) and laser welding.

Materials And Methods: Six standardized joining configurations of spring hard quality orthodontic wire were investigated: end-to-end, round, cross, 3 mm length, 9 mm length and 6.5 mm to orthodontic band.

Fracture strength of different soldered and welded orthodontic joining configurations with and without filling material.

The aim of this study was to compare the mechanical strength of different joints made by conventional brazing, TIG and laser welding with and without filling material. Five standardized joining configurations of orthodontic wire in spring hard quality were used: round, cross, 3 mm length, 9 mm length and 7 mm to orthodontic band. The joints were made by five different methods: brazing, tungsten inert gas (TIG) and laser welding with and without filling material.

The influence of different disinfectants on primary impression materials.

Objective: To investigate the dimensional changes and the surface quality of dental impression materials after disinfection with 3 chemically different agents.

Method And Materials: Four alginate impression materials and 1 addition silicone material were selected. The impressions were made from a brass model simulating a 3-unit fixed partial denture.

Influence of different brazing and welding methods on tensile strength and microhardness of orthodontic stainless steel wire.

The aim of this study was to compare the mechanical strength and microhardness of joints made by conventional brazing and tungsten inert gas (TIG) and laser welding. A standardized end-to-end joint configuration of the orthodontic wire material in spring hard quality was used. The joints were made using five different methods: brazing (soldering > 450 degrees C) with universal silver solder, two TIG, and two laser welders.

The importance of temporomandibular function for patient satisfaction following orthognathic surgery.

Aim: From the patient's point of view, the main reasons for undertaking orthognathic surgical treatment are esthetic improvements in dentofacial appearance. The aim of this study was to analyze various factors that influence patient satisfaction regarding treatment results.

Patients And Methods: A total of 102 (f = 67, m = 35) patients were examined after an average follow-up of 47 months.

Evaluation of vertical parameters in cephalometry.

Aim: The aim of this study was to determine the validity of different vertical parameters in cephalometry.

Materials And Methods: The cephalograms of 94 patients were used in this study. The inclusion criteria were as follows: skeletal Class I, completion of maximum skeletal growth, and no history of orthodontic therapy.

Clinical application and histological examination of the FAMI screw for skeletal anchorage--a pilot study.

Maximum anchorage often presents a problem that is difficult to solve during orthodontic tooth movement. Stationary, skeletal anchorage can be achieved in a simple, minimally-invasive manner, and unwanted tooth movements in opposite directions can be prevented by using transmucosally-inserted bone screws. Our initial experience using the FAMI screw as an orthodontic micro-implant proved to be clinically and histologically successful.

Complications of orthodontic-orthognathic surgery treatment in mentally handicapped patients.

Aim: The aim of this study was to analyse possible intra- and postoperative complications and long-term results in combined orthodontic-orthognathic treatment of mentally handicapped patients compared with a control group of patients without handicap.

Patients And Methods: A group of 20 mentally handicapped patients (male = 7, female = 13) and of 102 non-handicapped patients (male = 36, female = 66) were evaluated retrospectively. The results of the two point-discrimination sensory test and the cephalometric findings of both groups were assessed.

Classification of anterior open bite using individualized cephalometry.

Objective: The objective of this study was to describe the cephalometric characteristics of the open bite, and to classify the open bite according to individualized norms.

Material And Method: The lateral cephalograms of 134 patients with an anterior open bite (min -0.5 mm) were analyzed.