Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 52 for “"Premolar"”.
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First Premolar Extraction Decisions and Effects
… is to treat patients with the extraction of premolars. Not all of the extraction space, however, is needed to eliminate the patient's TSALD. Also, it is typical that some of the extraction space will be lost because the molars are used as anchorage units to retract the anterior teeth. …
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Oropharyngeal Airway Volume Following Orthodontic Treatment: Premolar Extraction Versus Non-Extraction
… dimensions following the extraction of four premolars and subsequent orthodontic therapy. Methods: Pretreatment and posttreatment CBCT images were taken on 88 healthy, adolescent orthodontic patients (27 with 4 premolar extraction, 61 non-extraction). Cephalometric measurements, as well as …
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Oropharyngeal Airway Volume Following Orthodontic Treatment: Premolar Extraction Versus Non-Extraction
… dimensions following the extraction of four premolars and subsequent orthodontic therapy. Methods: Pretreatment and posttreatment CBCT images were taken on 88 healthy, adolescent orthodontic patients (27 with 4 premolar extraction, 61 non-extraction). Cephalometric measurements, as well as …
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Prediction of Root Form Using Crown Data: Mandibular Left First Premolar
… shape model (SSM) of the lower left first premolar, consisting of both crown and root data, could adequately describe the root form from a surface scan consisting of only crown data. Secondly, it tested if there were any angles or measurements on the tooth crown that correlate with any …
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Quantitative Analysis of First- versus Second-Premolar Extraction Effects in Orthodontic Treatment
… discrepancies that have to be resolved by premolar extractions. Treatment planning in such cases usually involves removing first (P1) or second premolars (P2). Choosing an extraction pattern is a learned skill that incorporates many diagnostic factors. This study compared the amounts of …
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Premolar Extraction Cases Treated with Aligners: Are Contemporary Results Comparable to Fixed Appliances?
… Historically, it has been challenging to treat premolar extraction cases with aligners to the same occlusal standards as fixed appliances. The purpose of this study was to assess whether premolar extraction cases treated with Invisalign in the past 5 years have more comparable results to cases …
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Cuspal Deflection in Premolar Teeth Restored with Bulk-Fill Resin-Based Composite Materials
… slot mesio-occlusal-distal cavities (MOD) in premolar teeth. Methodology: Thirty-two sound maxillary premolar teeth with large slot MOD cavities were distributed to four groups (n=8). Three groups were restored with bulk-fill resin composite materials (Tetric EvoCeram, x-tra fil, and Sonic …
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HUMAN PREMOLAR CROWN SIZES ARE VARIABLE EVEN IN THE SAME MOUTH, WITH LOW TO HIGH POSITIVE CROWN SIZE CORRELATIONS AMONG PREMOLARS AND ALL MOLARS.
… on the ICM, other work in primates reported a Premolar Molar Module (PMM) where sizes of the fourth premolar (P4) and all three molars were highly positively correlated. Counter to the ICM, our lab previously found in contemporary humans that instead of M1 size, only M2 size estimates M3 size. …
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Relación dento-sinusal en el movimiento distal del canino.
… de ortodoncia con exodoncia de primeros premolares superiores es necesario desplazar hacia distal el canino y la presencia de las corticales del seno maxilar o del suelo de fosas nasales pueden complicar este movimiento. Dado que no se encuentra en la bibliografía, suficiente información …
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Canine mandibular osteotomy model: the effects of fixation on bone healing and nerve regeneration
Osteotomies made between premolar 3 and premolar 4 in the body of the mandible in canine cadaver hemimandibles (n = 48) were stabilized with five interdental fixation apparatuses in a preliminary biomechanical study. Testing in bending determined ultimate strength, stiffness, and yield strength of …
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Assessment of tooth movement in the maxilla during orthodontic treatment using digital recording of orthodontic study model surface contours
… treatment in patients treated with and without premolar extractions.
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A biophysical analysis of the occlusal wear of dental materials
… friction between occlusal surfaces of natural premolar teeth demonstrated large variation. High viscosity lubricants and surfactant containing lubricants were capable of reducing the surface friction. The enamel appeared otherwise insensitive to natural and artificial salivary fluids. …
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Comparison of Bone- and Tooth-Anchored, Bone-Anchored, and Surgically Assisted Bone-Anchored Rapid Palatal Expansion: a Pilot Retrospective CBCT Study
… two angular measurements evaluated at the first premolar, second premolar, first molar, and second molar levels for intra- and intergroup comparisons. Results: BTAME and BAME approaches both resulted in significant changes to transverse skeletal and alveolar transverse dimension with some dental …
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The Skeletal Effects to the Maxilla after Rapid Maxillary Expansion using CBCT
… the maxilla at the maxillary canine (Cl), first premolar (PI), second premolar (P2) and first molar (Ml) after rapid maxillary expansion (RME). Transverse effects to the maxillary suture, nasal width and maxillary sinus were also assessed. Included in the study were thirty consecutive patients …
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Dental and Buccal Bone Stability After Rapid Maxillary Expansion and Fixed Orthodontic Treatment
… buccal marginal bone level (BMBL) of the first premolar (P1), second premolar (P2) and first molar (M1) at T1, T2 and T3 were made and recorded. This data was compared using Friedman, Kruskal-Wallis, Wilcoxon Signed Rank and Mann-Whitney U-tests (α = 0.05). To determine which variables were …
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Effects of Unilateral Extraction Treatment on Arch Symmetry and Occlusion
… symmetry in patients treated with unilateral premolar extractions. Post-treatment casts of 60 patients were divided into four treatment groups based on the history of occlusal asymmetry and the treatment plan. DesignCAD3000 software (Upperspace Corporation, Pryor, OK) was used to evaluate …
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Comparative Study on Alveolar Bone Level of Maxillary Molar Area and Anatomical Variation of Maxillary Sinus with CT Image
… of remaining bones and septum near the maxillary premolar and molar regions has been examined. Then, it has been found that the amount of remaining bones had significant differences by region and the frequency of septum and that of patients with the pathological findings who needed to be excluded …
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Quality and intensity of pain associated with continuously applied orthodontic stresses of relatively high and low magnitudes
… males, 3 females) who required maxillary first premolar extractions had maxillary canines retracted segmentally using 4 kPa on one side and 78 kPa on the other. Subjects scored Modified McGill Pain Questionnaire- Short Forms (MMPQ-SF), Visual Analogue Scales (VAS), and Present Pain Intensities …
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