Introduction. It is well known that previously has been demonstrated a correlation between respir... more Introduction. It is well known that previously has been demonstrated a correlation between respiratory function and the harmonious craniofacial development and head posture respectively. Aim of the study. The purpose of this study was to investigate the correlation between rapid maxillary expansion (RME) and the change in natural head position (NHP) resulting from the consequent change in airway resistance and to elucidate how RME influences NHP in terms of cephalometric angles in children with nasal obstruction. Material and methods. The study included 12 girls and 8 boys who had a history of mouth breathing, as confirmed by the parents and ORL specialist and due to this fact, they underwent RME as part of orthodontic treatment. Dental casts, clinical photographs and lateral skull radiographs exposed in natural head position were obtained at the first visit (T1) and 8-10 months (T2) later for all subjects. In order to evaluate the patient's lateral skull radiographs, I used AudaxCeph software, within which I created a new type of analysis. Student T test and Pearson correlation test were used to statistically analyze the results. Results. Our findings demonstrate that no significant changes in any of the variables are observed in patients treated with rapid maxillary expansion, however a positive correlation was observed in the variables measured before and after the treatment, respectively between the anomaly and the measured values. Positivity can also be detected when examining the correlation between the patient's gender and the measured values. Conclusions. Based on the obtained results, we cannot state that there is a correlation between rapid maxillary expansion and cervical posture.
Revista medico-chirurgicală̆ a Societă̆ţ̜ii de Medici ş̧i Naturaliş̧ti din Iaş̧i, Sep 30, 2021
Lateral skull radiographs are used to perform cephalometric measurements and to evaluate the skel... more Lateral skull radiographs are used to perform cephalometric measurements and to evaluate the skeletal component of the orthodontic anomalies. It is difficult for the p atients to imagine the expected outcome of their orthodontic treatments. so visual treatment objectives (VTO) can be a significant motivating factor. It can be used to illustrate the e xpected growth. the outcome of orthognathic surgery and the amount of teeth movements. This study was aimed to evaluate the accuracy of the visual treatment objectives through analysis of predicted and actual treatment outcomes. The second objective was the compar ison of the initial cephalometric measurements with the final ones and th e visualized treatment objectives prediction accuracy. Material and methods: Using the AudaxCeph cephalometric program and Roth-Jarabak analysis, lateral skull radiographs of 27 patients were analyzed. Visual treatment objectives were assessed by modification of the dental parameters as well as of the skeletal bases where indicated. Results: Lateral skull radiographs taken after the orthodontic treatment were used to evaluate the final cephalometric measurements. Statistical comparison of the dental and skeletal measurements of the final radiographs and the visual treatment objectives did not show statistically significant differences of the most important parameters. However, the following measurements were significantly different when compared with the visual treatment objectives Ar-Go-N angle (degrees), Go-Ar distance (mm) and S-Ar / Ar-Go ratio. Conclusions: Using the VTO, the expected orthodontic outcome can be well estimated, and it can be considered an effective tool for planning.
Introduction: Tooth impaction is defined as the absence of a tooth on the arch, after its normal ... more Introduction: Tooth impaction is defined as the absence of a tooth on the arch, after its normal eruption age. The main reason canines are impacted is the lack of space required for the tooth to erupt. Aim of study: The main objective of this study is to determine the types of malocclusions associated with canine impaction (Lindauer classification). A secondary objective is to establish the correlation between these parameters and identification of subjects with high risk of canine impaction based on pre-existing malocclusion. Material and methods: This study was performed on a sample of 20 patients, 9 men and 11 women. The dental casts were subject to Angle classification and various measurements such as arch perimeter, Pont's index, sum of the mesiodistal width of the incisor and arch length were performed. The Lindauer sectorial classification was determined based on the patients' panoramic radiography. Results: According to the data collected, the Class II /2 malocclusion is more frequent, and it is associated with the impacted canine (approximately 50%). According to the Lindauer classification higher frequency of the impacted canines was found in Sector IV. Conclusion: The diagnosis for impacted canines is often associated with Class II /2 malocclusion, and according to the Sector classification, it is often localised in Sector IV.
Introduction: The fundamental mechanical properties of 3D printed surgical guides used in orthodo... more Introduction: The fundamental mechanical properties of 3D printed surgical guides used in orthodontics represent an important indicator for the accuracy of the insertion of skeletal anchorage devices. The tensile strength of devices printed by stereolithography (SLA) and digital light processing (DLP) methods, respectively, is influenced by factors such as finishing process. Aim of the study: This study illustrates a comparison of the tensile strength in two different types of 3D printed devices (SLA, DLP respectively) undergoing or not a standard process of polishing. Material and methods: Twenty-four specimens obtained according to ASTM D638-14 (Standard Test Method for Tensile Properties of Plastics) were used for the evaluation of tensile strength. Four groups of 6 samples from each category were created: SLA polished, SLA unpolished, DLP polished and DLP unpolished. After removing the support, finishing was performed to obtain smooth surfaces, according to the manufacturer’s re...
Lateral skull radiographs are used to perform cephalometric measurements and to evaluate the skel... more Lateral skull radiographs are used to perform cephalometric measurements and to evaluate the skeletal component of the orthodontic anomalies. It is difficult for the p atients to imagine the expected outcome of their orthodontic treatments. so visual treatment objectives (VTO) can be a significant motivating factor. It can be used to illustrate the e xpected growth. the outcome of orthognathic surgery and the amount of teeth movements. This study was aimed to evaluate the accuracy of the visual treatment objectives through analysis of predicted and actual treatment outcomes. The second objective was the compar ison of the initial cephalometric measurements with the final ones and th e visualized treatment objectives prediction accuracy. Material and methods: Using the AudaxCeph cephalometric program and Roth-Jarabak analysis, lateral skull radiographs of 27 patients were analyzed. Visual treatment objectives were assessed by modification of the dental parameters as well as of the skeletal bases where indicated. Results: Lateral skull radiographs taken after the orthodontic treatment were used to evaluate the final cephalometric measurements. Statistical comparison of the dental and skeletal measurements of the final radiographs and the visual treatment objectives did not show statistically significant differences of the most important parameters. However, the following measurements were significantly different when compared with the visual treatment objectives Ar-Go-N angle (degrees), Go-Ar distance (mm) and S-Ar / Ar-Go ratio. Conclusions: Using the VTO, the expected orthodontic outcome can be well estimated, and it can be considered an effective tool for planning.
Introduction. It is well known that previously has been demonstrated a correlation between respir... more Introduction. It is well known that previously has been demonstrated a correlation between respiratory function and the harmonious craniofacial development and head posture respectively. Aim of the study. The purpose of this study was to investigate the correlation between rapid maxillary expansion (RME) and the change in natural head position (NHP) resulting from the consequent change in airway resistance and to elucidate how RME influences NHP in terms of cephalometric angles in children with nasal obstruction. Material and methods. The study included 12 girls and 8 boys who had a history of mouth breathing, as confirmed by the parents and ORL specialist and due to this fact, they underwent RME as part of orthodontic treatment. Dental casts, clinical photographs and lateral skull radiographs exposed in natural head position were obtained at the first visit (T1) and 8-10 months (T2) later for all subjects. In order to evaluate the patient’s lateral skull radiographs, I used AudaxCe...
<jats:p>The correlation between the superior airways and the craniofacial development has... more <jats:p>The correlation between the superior airways and the craniofacial development has been the subject of many studies where the mouth breathing is one of the main causes for the underdevelopment of the inferior and middle level of the face. The skeletal and dental alterations are caused by the muscle balance disturbance, where the orbicularis hypotonia makes it impossible to properly close the mouth and the masseters hypertonia applies pressure on the lateral areas of the alveolar arches. This study was conducted in a group of young subjects with mouth breathing, assessing the changes of several skeletal and dental parameters by analyzing the dental casts (anterior perimetry, intermolar distance, intercanine distance) and the cephalometric radiography (Tweed and Steiner cephalometric analysis). The analysis was applied before and after functional orthodontics treatment, and its aim was to correct the vicious habit by encouraging nasal breathing and palatal expansion. The functional orthodontics together with miogimnastical exercises are an efficient treatment method which significantly contributes in breaking the vicious habit and enabling treatments for skeletal complications caused by oral breathing. </jats:p>
The insertion of the fixed retention is an important stage of the orthodontic treatment after fix... more The insertion of the fixed retention is an important stage of the orthodontic treatment after fixed appliances. The fixed retainers used in orthodontic treatments must be passive towards teeth, without developing any stress. This characteristic is challenging to achieve due to the mechanical properties (bending properties, stiffness) of the materials the retainers are manufactured from. Residual stress might be generated because of their flexibility and because the chemical composition of the stainless steel wires.This study aims to determine the mechanical properties of different austenitic stainlees steel wires used in retention. Also, we have compared the mechanical properties of wires with different sizes, as well as wires with the same size, new and intra-orally used. The results confirm that the mechanical parameters of the two types of wires used in fixed retention (3 braided round wires and 6 braided Flat wires) present statistically insignificant differences. The study also...
Introduction: Tooth impaction is defined as the absence of a tooth on the arch, after its normal ... more Introduction: Tooth impaction is defined as the absence of a tooth on the arch, after its normal eruption age. The main reason canines are impacted is the lack of space required for the tooth to erupt. Aim of study: The main objective of this study is to determine the types of malocclusions associated with canine impaction (Lindauer classification). A secondary objective is to establish the correlation between these parameters and identification of subjects with high risk of canine impaction based on pre-existing malocclusion. Material and methods: This study was performed on a sample of 20 patients, 9 men and 11 women. The dental casts were subject to Angle classification and various measurements such as arch perimeter, Pont’s index, sum of the mesiodistal width of the incisor and arch length were performed. The Lindauer sectorial classification was determined based on the patients’ panoramic radiography. Results: According to the data collected, the Class II /2 malocclusion is mor...
Introduction. It is well known that previously has been demonstrated a correlation between respir... more Introduction. It is well known that previously has been demonstrated a correlation between respiratory function and the harmonious craniofacial development and head posture respectively. Aim of the study. The purpose of this study was to investigate the correlation between rapid maxillary expansion (RME) and the change in natural head position (NHP) resulting from the consequent change in airway resistance and to elucidate how RME influences NHP in terms of cephalometric angles in children with nasal obstruction. Material and methods. The study included 12 girls and 8 boys who had a history of mouth breathing, as confirmed by the parents and ORL specialist and due to this fact, they underwent RME as part of orthodontic treatment. Dental casts, clinical photographs and lateral skull radiographs exposed in natural head position were obtained at the first visit (T1) and 8-10 months (T2) later for all subjects. In order to evaluate the patient's lateral skull radiographs, I used AudaxCeph software, within which I created a new type of analysis. Student T test and Pearson correlation test were used to statistically analyze the results. Results. Our findings demonstrate that no significant changes in any of the variables are observed in patients treated with rapid maxillary expansion, however a positive correlation was observed in the variables measured before and after the treatment, respectively between the anomaly and the measured values. Positivity can also be detected when examining the correlation between the patient's gender and the measured values. Conclusions. Based on the obtained results, we cannot state that there is a correlation between rapid maxillary expansion and cervical posture.
Revista medico-chirurgicală̆ a Societă̆ţ̜ii de Medici ş̧i Naturaliş̧ti din Iaş̧i, Sep 30, 2021
Lateral skull radiographs are used to perform cephalometric measurements and to evaluate the skel... more Lateral skull radiographs are used to perform cephalometric measurements and to evaluate the skeletal component of the orthodontic anomalies. It is difficult for the p atients to imagine the expected outcome of their orthodontic treatments. so visual treatment objectives (VTO) can be a significant motivating factor. It can be used to illustrate the e xpected growth. the outcome of orthognathic surgery and the amount of teeth movements. This study was aimed to evaluate the accuracy of the visual treatment objectives through analysis of predicted and actual treatment outcomes. The second objective was the compar ison of the initial cephalometric measurements with the final ones and th e visualized treatment objectives prediction accuracy. Material and methods: Using the AudaxCeph cephalometric program and Roth-Jarabak analysis, lateral skull radiographs of 27 patients were analyzed. Visual treatment objectives were assessed by modification of the dental parameters as well as of the skeletal bases where indicated. Results: Lateral skull radiographs taken after the orthodontic treatment were used to evaluate the final cephalometric measurements. Statistical comparison of the dental and skeletal measurements of the final radiographs and the visual treatment objectives did not show statistically significant differences of the most important parameters. However, the following measurements were significantly different when compared with the visual treatment objectives Ar-Go-N angle (degrees), Go-Ar distance (mm) and S-Ar / Ar-Go ratio. Conclusions: Using the VTO, the expected orthodontic outcome can be well estimated, and it can be considered an effective tool for planning.
Introduction: Tooth impaction is defined as the absence of a tooth on the arch, after its normal ... more Introduction: Tooth impaction is defined as the absence of a tooth on the arch, after its normal eruption age. The main reason canines are impacted is the lack of space required for the tooth to erupt. Aim of study: The main objective of this study is to determine the types of malocclusions associated with canine impaction (Lindauer classification). A secondary objective is to establish the correlation between these parameters and identification of subjects with high risk of canine impaction based on pre-existing malocclusion. Material and methods: This study was performed on a sample of 20 patients, 9 men and 11 women. The dental casts were subject to Angle classification and various measurements such as arch perimeter, Pont's index, sum of the mesiodistal width of the incisor and arch length were performed. The Lindauer sectorial classification was determined based on the patients' panoramic radiography. Results: According to the data collected, the Class II /2 malocclusion is more frequent, and it is associated with the impacted canine (approximately 50%). According to the Lindauer classification higher frequency of the impacted canines was found in Sector IV. Conclusion: The diagnosis for impacted canines is often associated with Class II /2 malocclusion, and according to the Sector classification, it is often localised in Sector IV.
Introduction: The fundamental mechanical properties of 3D printed surgical guides used in orthodo... more Introduction: The fundamental mechanical properties of 3D printed surgical guides used in orthodontics represent an important indicator for the accuracy of the insertion of skeletal anchorage devices. The tensile strength of devices printed by stereolithography (SLA) and digital light processing (DLP) methods, respectively, is influenced by factors such as finishing process. Aim of the study: This study illustrates a comparison of the tensile strength in two different types of 3D printed devices (SLA, DLP respectively) undergoing or not a standard process of polishing. Material and methods: Twenty-four specimens obtained according to ASTM D638-14 (Standard Test Method for Tensile Properties of Plastics) were used for the evaluation of tensile strength. Four groups of 6 samples from each category were created: SLA polished, SLA unpolished, DLP polished and DLP unpolished. After removing the support, finishing was performed to obtain smooth surfaces, according to the manufacturer’s re...
Lateral skull radiographs are used to perform cephalometric measurements and to evaluate the skel... more Lateral skull radiographs are used to perform cephalometric measurements and to evaluate the skeletal component of the orthodontic anomalies. It is difficult for the p atients to imagine the expected outcome of their orthodontic treatments. so visual treatment objectives (VTO) can be a significant motivating factor. It can be used to illustrate the e xpected growth. the outcome of orthognathic surgery and the amount of teeth movements. This study was aimed to evaluate the accuracy of the visual treatment objectives through analysis of predicted and actual treatment outcomes. The second objective was the compar ison of the initial cephalometric measurements with the final ones and th e visualized treatment objectives prediction accuracy. Material and methods: Using the AudaxCeph cephalometric program and Roth-Jarabak analysis, lateral skull radiographs of 27 patients were analyzed. Visual treatment objectives were assessed by modification of the dental parameters as well as of the skeletal bases where indicated. Results: Lateral skull radiographs taken after the orthodontic treatment were used to evaluate the final cephalometric measurements. Statistical comparison of the dental and skeletal measurements of the final radiographs and the visual treatment objectives did not show statistically significant differences of the most important parameters. However, the following measurements were significantly different when compared with the visual treatment objectives Ar-Go-N angle (degrees), Go-Ar distance (mm) and S-Ar / Ar-Go ratio. Conclusions: Using the VTO, the expected orthodontic outcome can be well estimated, and it can be considered an effective tool for planning.
Introduction. It is well known that previously has been demonstrated a correlation between respir... more Introduction. It is well known that previously has been demonstrated a correlation between respiratory function and the harmonious craniofacial development and head posture respectively. Aim of the study. The purpose of this study was to investigate the correlation between rapid maxillary expansion (RME) and the change in natural head position (NHP) resulting from the consequent change in airway resistance and to elucidate how RME influences NHP in terms of cephalometric angles in children with nasal obstruction. Material and methods. The study included 12 girls and 8 boys who had a history of mouth breathing, as confirmed by the parents and ORL specialist and due to this fact, they underwent RME as part of orthodontic treatment. Dental casts, clinical photographs and lateral skull radiographs exposed in natural head position were obtained at the first visit (T1) and 8-10 months (T2) later for all subjects. In order to evaluate the patient’s lateral skull radiographs, I used AudaxCe...
<jats:p>The correlation between the superior airways and the craniofacial development has... more <jats:p>The correlation between the superior airways and the craniofacial development has been the subject of many studies where the mouth breathing is one of the main causes for the underdevelopment of the inferior and middle level of the face. The skeletal and dental alterations are caused by the muscle balance disturbance, where the orbicularis hypotonia makes it impossible to properly close the mouth and the masseters hypertonia applies pressure on the lateral areas of the alveolar arches. This study was conducted in a group of young subjects with mouth breathing, assessing the changes of several skeletal and dental parameters by analyzing the dental casts (anterior perimetry, intermolar distance, intercanine distance) and the cephalometric radiography (Tweed and Steiner cephalometric analysis). The analysis was applied before and after functional orthodontics treatment, and its aim was to correct the vicious habit by encouraging nasal breathing and palatal expansion. The functional orthodontics together with miogimnastical exercises are an efficient treatment method which significantly contributes in breaking the vicious habit and enabling treatments for skeletal complications caused by oral breathing. </jats:p>
The insertion of the fixed retention is an important stage of the orthodontic treatment after fix... more The insertion of the fixed retention is an important stage of the orthodontic treatment after fixed appliances. The fixed retainers used in orthodontic treatments must be passive towards teeth, without developing any stress. This characteristic is challenging to achieve due to the mechanical properties (bending properties, stiffness) of the materials the retainers are manufactured from. Residual stress might be generated because of their flexibility and because the chemical composition of the stainless steel wires.This study aims to determine the mechanical properties of different austenitic stainlees steel wires used in retention. Also, we have compared the mechanical properties of wires with different sizes, as well as wires with the same size, new and intra-orally used. The results confirm that the mechanical parameters of the two types of wires used in fixed retention (3 braided round wires and 6 braided Flat wires) present statistically insignificant differences. The study also...
Introduction: Tooth impaction is defined as the absence of a tooth on the arch, after its normal ... more Introduction: Tooth impaction is defined as the absence of a tooth on the arch, after its normal eruption age. The main reason canines are impacted is the lack of space required for the tooth to erupt. Aim of study: The main objective of this study is to determine the types of malocclusions associated with canine impaction (Lindauer classification). A secondary objective is to establish the correlation between these parameters and identification of subjects with high risk of canine impaction based on pre-existing malocclusion. Material and methods: This study was performed on a sample of 20 patients, 9 men and 11 women. The dental casts were subject to Angle classification and various measurements such as arch perimeter, Pont’s index, sum of the mesiodistal width of the incisor and arch length were performed. The Lindauer sectorial classification was determined based on the patients’ panoramic radiography. Results: According to the data collected, the Class II /2 malocclusion is mor...
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