Mihaela Chirila - Academia.edu (original) (raw)

Papers by Mihaela Chirila

Research paper thumbnail of Practical Aspects Regarding Magnetic Retained Overdenture

Acta Medica Transilvanica, 2021

Overdenture is a type of treatment suitable for subtotal and complete edentulous patients and is ... more Overdenture is a type of treatment suitable for subtotal and complete edentulous patients and is characterized by making a total prosthesis, with the mucosal face embedding remaining teeth (remaining roots) or dental implants. In this material we will try to present some practical aspects, regarding retained overdenture with magnetic systems fixed in the remaining roots at the level of the dental arches.

Research paper thumbnail of In vitro evaluation of the cyto- and genotoxicity of titanium and titanium-based alloy Ti-6Al-4V used in the manufacture of screw type dental implants - preliminary study

Introduction. Titanium and the alloys that contain this element became in the last decade of the ... more Introduction. Titanium and the alloys that contain this element became in the last decade of the twentieth century almost irreplaceable materials in many biomedical fields, including dentistry. Purpose. The purpose of this study is to test and evaluate the cytoand genotoxicity of Ti4 and Ti-6Al-4V, to obtain biomaterials with antimicrobial properties, compatible with the human body. Material and method. Ti4 and Ti-4Al-6V in powder form were analyzed using cell proliferation analysis and micronucleus test. Two concentrations of 1.5 mg/ml and 3 mg/ml were tested for each type of sample. Results and discussions. For both materials tested in the two concentrations, the presence of micronuclei was observed, but within normal limits. Conclusions. Although the variations are within normal limits, it should be noted that for Ti-6Al-4V the incidence was higher at both concentrations than in the case of Ti4.

Research paper thumbnail of First Report in Romania Regarding Salivary Iodine Level and Its Correlation with Carious Lesions , Chronic Marginal Periodontitis and Periapical Pathology

Since the beginning of administration of iodine to prevent iodine deficiency, children have less ... more Since the beginning of administration of iodine to prevent iodine deficiency, children have less dental cavities; iodine seems to increase the resistance to dental caries, retarding the process and reducing its incidence (in Romania the law regarding universal salt iodization was implemented in January 2003). Given its antioxidant properties, iodide may act as an antimicrobial agent in saliva. In our studied groups (group I, II, III) we found a statistically significant difference between the smokers and nonsmokers on each of the above mentioned group. Our results confirm previous studies, showing that smoking had an increasing effect on the concentration of salivary thyocianate and a decreasing effect on the content of iodide in saliva.

Research paper thumbnail of Biological Effects of Endodontic Medication on Human Fibroblast Cell Culture

The aim of this in vitro study was to determine the cytotoxic effect of endodontic medication in ... more The aim of this in vitro study was to determine the cytotoxic effect of endodontic medication in the treatment of apical periodontitis. Materials and Methods: The toxicity of four antibacterial products (Cresophene, Septodont. Ledermix, Riemser. R4, Septodont. Calxyl, OCO Praparate.) commonly used as endodontic dressings, has been tested on a stabilized human diploid cell line of fibroblasts ICP-23, similar to human diploid cell lines belonging to ATCC ( American Tissue Culture Collection). The outcome of the study, that run 96 hours, was expresed as a mortality test. Results: Statistic analysis of the mortality of a fibroblasts cell line (ICP-23) induced by different endodontic dressings highlights the lowest cytotoxicity for Ledermix and highest levels for Calxyl and Cresophene. In case of Ledermix, the cell mortality raised after 96 hours only with 50%, as compared to Cresophene and Calxyl, approximately twice. R4 had an intermediate value. Conclusions: Some proprietary antimicro...

Research paper thumbnail of Tertiary dentin deposition in the proximity of the cervical perforation aperture – A case study

Romanian Biotechnological Letters, 2021

Dead tracts are dentin areas characterized by degenerated odontoblastic processes; may result fro... more Dead tracts are dentin areas characterized by degenerated odontoblastic processes; may result from injury caused by caries, attrition, erosion, or cavity preparation. Odontoblasts can also form tertiary dentin, as a response to injury, in association with caries, trauma, or restorative procedures. Generally, this dentin is less organized than primary and secondary dentin and mostly localized to the site of injury. The reactive dentin formation that lays under caries, the pulp displays chronic inflammation and tertiary dentinogenesis takes place on the inner walls of the pulp space, in the region of the dentinal tubules associated with the base of the carious lesion. Higher-power photomicrograph of tertiary dentin shown in a primary dentin, first period of tertiary dentin formation, second period of tertiary dentin formation. We initiated a case study regarding depositition of tertiary dentin in the close proximity of the cervical perforation hole on mesial root of the second maxilla...

Research paper thumbnail of Etiology and Prevention of an Endodontic Iatrogenic Event: Instrument Fracture

Journal of Medicine and Life

Although benefiting from an unprecedented technological evolution, contemporary endodontics is st... more Although benefiting from an unprecedented technological evolution, contemporary endodontics is still characterized by the recurrence of retreatments, due to the need to solve quite frequent incidents, accidents, or even failures of primary endodontic treatment. This survey aims to assess both the etiology and the prevention methods of one of the most troublesome endodontic iatrogenies: instrument separation during root canal shaping. The multifactorial nature of this occurrence entails identifying and taking into account all the causal and contributing factors. Their significant number and the possible involvement of any of them, starting with the complexity and variability of the root canals and ending with the technical specifications concerning the nickel-titanium rotary instrumentation system being used, highlight the necessity to develop valid guidelines to avert the occurring of such an upsetting situation.

Research paper thumbnail of Performance Evaluation on Rotary Preparation of Root Canal by Beginner Operators

Journal of Medicine and Life, 2020

This study aims to analyze the performance of rotary root canal preparation, conducted by beginne... more This study aims to analyze the performance of rotary root canal preparation, conducted by beginner operators (students). After acquiring the necessary skills involved in applying endodontic preparation techniques on extracted teeth, all students from a cohort learned to use ProTaper Universal files (Dentsply Maillefer). The preclinical training had several stages. Experience 1: instrumentation on extracted single-root teeth; Experience 2: instrumentation on EndoTraining blocks (Dentsply Maillefer); Experience 3: instrumentation on EndoTraining blocks (Dia Dent Group International); Experience 4: Instrumentation on extracted multiradicular teeth. Preparation was done according to the manufacturer’s instructions, the initial file is Sx, followed by S1, S2, F1, F2 and the last file is F3. A batch of 50 teeth (E1, E2, E3, E4) was randomly selected to evaluate the onset of the rotary preparation of young operators. Two independent evaluators analyzed the array radiologically by stereomic...

Research paper thumbnail of Stereomicroscopic and Microscopic Study of Dental Structural Aspects Derived from Iatrogenic and Pathological Processes Suffered by a Second Mandibular Premolar - A Case Study

Journal of Medicine and Life, 2020

Microscopic studies performed on extracted human teeth after their preparation in advance is help... more Microscopic studies performed on extracted human teeth after their preparation in advance is helpful in a relatively good reestablishment of the treatment steps that have been applied to these teeth, as well as an evaluation of the quality of such treatments. Therefore, we have used stereo- and optical microscopy, highlighting aspects of external morphology, as well as root canal space of an extracted mandibular second premolar, subjected to prosthetic and endodontic treatment. In order to verify some technical errors that might occur during the endodontic and restorative treatment, we tried to appreciate the quality of the root canal filling and cervical defect and access cavity restoration of an extracted premolar #45.Without having the data from clinical records, we concluded that the method used for root canal filling was the warm lateral condensation technic; we also appreciated the quality of the fusion of the gutta-percha cones used, so the introduction of heated spreaders on...

Research paper thumbnail of Fracture resistance of endodontically treated teeth restored with resin post reinforced with glass fiber

Journal of Medicine and Life, 2021

This study aims to determine whether the design of resin posts reinforced with glass fiber (FRC) ... more This study aims to determine whether the design of resin posts reinforced with glass fiber (FRC) and Reporfost (Angelus, Londrina, PR, Brazil) significantly improves the fracture resistance of endodontically treated teeth restored through this method.A batch of 30 maxillary monoradicular teeth (15 central incisors, 15 canines) were treated endodontically by step-back technique (apical enlargement 40-K file) sealed with Sealapex (Kerr Corporation, Orange, US) and gutta-percha by lateral condensation, cold. They were divided into two equal groups, prepared for cementing the FRC posts. The Exacto posts (Angelus, Londrina, PR, Brazil) in group 1 and the Reforpost posts (Angelus; Londrina; PR, Brazil) were cemented with dual cure resin cement Breeze Self-Adhesive Resin Cement (Pentron Clinical, Orange, US). Fracture resistance testing was performed on the crown-apical axial direction, using the Hounsfield / Tinius Olsen H1-KS, PA, USA mechanical testing apparatus. The behavior of each to...

Research paper thumbnail of A microscopic study on the intercanalar isthmuses of the maxillary premolars and associated iatrogenic cracks

Romanian Biotechnological Letters, 2020

The purpose of this microscopic investigation, using stereomicroscopy and light transmited micros... more The purpose of this microscopic investigation, using stereomicroscopy and light transmited microscopy was to evaluate the configuration of the endodontic treated maxillary premolars, making correlations between the presence of the intercanalar isthmuses and also, to identify possible associated fracture lines. We also evaluated the thickness of the tertiary dentinal layer (irritation dentin layer). The study was based on microscopic investigation on thin sections on fragments or separate preparations resulting from 12 premolars that were clinically compromised. The tertiary dentin is deposited in response to irritations and moderate intensity injuries. As the tendency of crack propagation is directed to the areas corresponding to the root canal towards one of the root surfaces (which is the closest) the crackline – almost without exception, is more or less arched, without detecting an eventual crack in a straight line.

Research paper thumbnail of Reputed Dentists and / or Specialists in the Oro-Maxillo-Facial Field Who Worked in French Civil and Military Hospitals During the First World War (1914-1918)

The First World War was and is considered the most terrible conflagration of all time. Thus, over... more The First World War was and is considered the most terrible conflagration of all time. Thus, over 65,000,000 soldiers made up the corps of land armies, naval and air forces, combat armies that participated in the conduct of military operations during the First World War. About 8,500,000 people died and more than 21,000,000 were injured. France was one of the countries most affected by this war, its medical services, including dentistry and oral and maxillofacial surgery, being completely obsolete. Thus, in this material, we tried to describe some important figures of French oral and maxillofacial dentistry and surgery, which were active in French civil and military hospitals during the First World War (1914-1918).

Research paper thumbnail of Fracture resistance of endodontically treated teeth restored with resin post reinforced with glass fiber

Journal of Medicine and Life

This study aims to determine whether the design of resin posts reinforced with glass fiber (FRC) ... more This study aims to determine whether the design of resin posts reinforced with glass fiber (FRC) and Reporfost (Angelus, Londrina, PR, Brazil) significantly improves the fracture resistance of endodontically treated teeth restored through this method.A batch of 30 maxillary monoradicular teeth (15 central incisors, 15 canines) were treated endodontically by step-back technique (apical enlargement 40-K file) sealed with Sealapex (Kerr Corporation, Orange, US) and gutta-percha by lateral condensation, cold. They were divided into two equal groups, prepared for cementing the FRC posts. The Exacto posts (Angelus, Londrina, PR, Brazil) in group 1 and the Reforpost posts (Angelus; Londrina; PR, Brazil) were cemented with dual cure resin cement Breeze Self-Adhesive Resin Cement (Pentron Clinical, Orange, US). Fracture resistance testing was performed on the crown-apical axial direction, using the Hounsfield / Tinius Olsen H1-KS, PA, USA mechanical testing apparatus. The behavior of each to...

Research paper thumbnail of Evaluation of the sealer/gutta-percha ratio on sets of root section surfaces of some extracted teeth sealed using the cold lateral condensation technique

Journal of Medicine and Life

Canal filling must be well adapted to the walls of the root canal to prevent bacterial infiltrati... more Canal filling must be well adapted to the walls of the root canal to prevent bacterial infiltration. Endodontic seals play an essential role in ensuring tightness, without which the canal filling would suffer infiltrations. This study aimed to evaluate the areas occupied by the two components of the canal filling, as well as the sealer/gutta-percha ratio in the root canals of the maxillary central incisors after their filling using the cold lateral condensation technique with gutta-percha. Thirty extracted upper central incisors were rotatably prepared with ProTaper Universal up to F3 and sealed using the cold lateral condensation technique with gutta-percha. After setting the sealer, the roots of the teeth were sectioned perpendicularly to 1 (L1), 3 (L3), 6 (L6), and 8 (L8) mm from the apex. The surface of the sections was analyzed with a Leica EZ4D stereomicroscope and photographed at two magnification orders: 10x and 25x. The areas corresponding to the gutta-percha, sealer, gaps,...

Research paper thumbnail of Hopeless tooth? Prognosis and comprehensive treatment. A case report

Journal of Medicine and Life

A hopeless tooth from a periodontal point of view, with severe bone resorption, mobility and abno... more A hopeless tooth from a periodontal point of view, with severe bone resorption, mobility and abnormal tooth migration, is often extracted. In advanced cases, function and esthetics are impaired, and an interdisciplinary treatment is requested. Retaining or not these teeth is based on clinician judgment. A growing body of evidence claims that prognosis has great potential to be improved in a motivated patient with good oral hygiene and regular maintenance. This case report aims to present a periodontal regenerative technique combining enamel matrix protein derivatives and a particulated xenograft to treat intraosseous defects caused by periodontitis. The patient healed uneventfully, and no complications were recorded after the surgical procedure. To correct abnormal tooth migration and improve function and esthetics, orthodontic treatment was instituted. Tooth prognosis improved from hopeless to questionable. This approach extended the life span of a compromised tooth, improving peri...

Research paper thumbnail of Theoretical and Practical Aspects of Sedentary Behavior Among Medical Professions in the Field of Dentistry – Part I

Romanian Medical Journal

Sedentary behavior, both professional, occupational, and leisure, recreational, is one of the maj... more Sedentary behavior, both professional, occupational, and leisure, recreational, is one of the major risk factors for cardio-metabolic health and premature mortality. But we find this sedentary behavior in many of the existing professional activities in 2021, among which are the professional activities with a medical profile in the field of dentistry: specific activities of the dental office (and here we discuss dentists and dental nurses) and activities specific to the dental technique laboratory (in this case, we are talking about dental technicians).

Research paper thumbnail of Aspects related to dental practice in Romania during the COVID-19 pandemic

Romanian Journal of Stomatology

Aspecte legate de practica stomatologică din România în perioada pandemiei COVID-19 marina imre 1... more Aspecte legate de practica stomatologică din România în perioada pandemiei COVID-19 marina imre 1 , Silviu Mirel Pițuru 2 , Alexandra totan 3 , mihaela pantea 4 , mihaela chirila 5 ,

Research paper thumbnail of Microscopic study of endodontic ledges on extracted teeth

Romanian Biotechnological Letters

Research paper thumbnail of Practical Aspects Regarding Magnetic Retained Overdenture

Acta Medica Transilvanica, 2021

Overdenture is a type of treatment suitable for subtotal and complete edentulous patients and is ... more Overdenture is a type of treatment suitable for subtotal and complete edentulous patients and is characterized by making a total prosthesis, with the mucosal face embedding remaining teeth (remaining roots) or dental implants. In this material we will try to present some practical aspects, regarding retained overdenture with magnetic systems fixed in the remaining roots at the level of the dental arches.

Research paper thumbnail of In vitro evaluation of the cyto- and genotoxicity of titanium and titanium-based alloy Ti-6Al-4V used in the manufacture of screw type dental implants - preliminary study

Introduction. Titanium and the alloys that contain this element became in the last decade of the ... more Introduction. Titanium and the alloys that contain this element became in the last decade of the twentieth century almost irreplaceable materials in many biomedical fields, including dentistry. Purpose. The purpose of this study is to test and evaluate the cytoand genotoxicity of Ti4 and Ti-6Al-4V, to obtain biomaterials with antimicrobial properties, compatible with the human body. Material and method. Ti4 and Ti-4Al-6V in powder form were analyzed using cell proliferation analysis and micronucleus test. Two concentrations of 1.5 mg/ml and 3 mg/ml were tested for each type of sample. Results and discussions. For both materials tested in the two concentrations, the presence of micronuclei was observed, but within normal limits. Conclusions. Although the variations are within normal limits, it should be noted that for Ti-6Al-4V the incidence was higher at both concentrations than in the case of Ti4.

Research paper thumbnail of First Report in Romania Regarding Salivary Iodine Level and Its Correlation with Carious Lesions , Chronic Marginal Periodontitis and Periapical Pathology

Since the beginning of administration of iodine to prevent iodine deficiency, children have less ... more Since the beginning of administration of iodine to prevent iodine deficiency, children have less dental cavities; iodine seems to increase the resistance to dental caries, retarding the process and reducing its incidence (in Romania the law regarding universal salt iodization was implemented in January 2003). Given its antioxidant properties, iodide may act as an antimicrobial agent in saliva. In our studied groups (group I, II, III) we found a statistically significant difference between the smokers and nonsmokers on each of the above mentioned group. Our results confirm previous studies, showing that smoking had an increasing effect on the concentration of salivary thyocianate and a decreasing effect on the content of iodide in saliva.

Research paper thumbnail of Biological Effects of Endodontic Medication on Human Fibroblast Cell Culture

The aim of this in vitro study was to determine the cytotoxic effect of endodontic medication in ... more The aim of this in vitro study was to determine the cytotoxic effect of endodontic medication in the treatment of apical periodontitis. Materials and Methods: The toxicity of four antibacterial products (Cresophene, Septodont. Ledermix, Riemser. R4, Septodont. Calxyl, OCO Praparate.) commonly used as endodontic dressings, has been tested on a stabilized human diploid cell line of fibroblasts ICP-23, similar to human diploid cell lines belonging to ATCC ( American Tissue Culture Collection). The outcome of the study, that run 96 hours, was expresed as a mortality test. Results: Statistic analysis of the mortality of a fibroblasts cell line (ICP-23) induced by different endodontic dressings highlights the lowest cytotoxicity for Ledermix and highest levels for Calxyl and Cresophene. In case of Ledermix, the cell mortality raised after 96 hours only with 50%, as compared to Cresophene and Calxyl, approximately twice. R4 had an intermediate value. Conclusions: Some proprietary antimicro...

Research paper thumbnail of Tertiary dentin deposition in the proximity of the cervical perforation aperture – A case study

Romanian Biotechnological Letters, 2021

Dead tracts are dentin areas characterized by degenerated odontoblastic processes; may result fro... more Dead tracts are dentin areas characterized by degenerated odontoblastic processes; may result from injury caused by caries, attrition, erosion, or cavity preparation. Odontoblasts can also form tertiary dentin, as a response to injury, in association with caries, trauma, or restorative procedures. Generally, this dentin is less organized than primary and secondary dentin and mostly localized to the site of injury. The reactive dentin formation that lays under caries, the pulp displays chronic inflammation and tertiary dentinogenesis takes place on the inner walls of the pulp space, in the region of the dentinal tubules associated with the base of the carious lesion. Higher-power photomicrograph of tertiary dentin shown in a primary dentin, first period of tertiary dentin formation, second period of tertiary dentin formation. We initiated a case study regarding depositition of tertiary dentin in the close proximity of the cervical perforation hole on mesial root of the second maxilla...

Research paper thumbnail of Etiology and Prevention of an Endodontic Iatrogenic Event: Instrument Fracture

Journal of Medicine and Life

Although benefiting from an unprecedented technological evolution, contemporary endodontics is st... more Although benefiting from an unprecedented technological evolution, contemporary endodontics is still characterized by the recurrence of retreatments, due to the need to solve quite frequent incidents, accidents, or even failures of primary endodontic treatment. This survey aims to assess both the etiology and the prevention methods of one of the most troublesome endodontic iatrogenies: instrument separation during root canal shaping. The multifactorial nature of this occurrence entails identifying and taking into account all the causal and contributing factors. Their significant number and the possible involvement of any of them, starting with the complexity and variability of the root canals and ending with the technical specifications concerning the nickel-titanium rotary instrumentation system being used, highlight the necessity to develop valid guidelines to avert the occurring of such an upsetting situation.

Research paper thumbnail of Performance Evaluation on Rotary Preparation of Root Canal by Beginner Operators

Journal of Medicine and Life, 2020

This study aims to analyze the performance of rotary root canal preparation, conducted by beginne... more This study aims to analyze the performance of rotary root canal preparation, conducted by beginner operators (students). After acquiring the necessary skills involved in applying endodontic preparation techniques on extracted teeth, all students from a cohort learned to use ProTaper Universal files (Dentsply Maillefer). The preclinical training had several stages. Experience 1: instrumentation on extracted single-root teeth; Experience 2: instrumentation on EndoTraining blocks (Dentsply Maillefer); Experience 3: instrumentation on EndoTraining blocks (Dia Dent Group International); Experience 4: Instrumentation on extracted multiradicular teeth. Preparation was done according to the manufacturer’s instructions, the initial file is Sx, followed by S1, S2, F1, F2 and the last file is F3. A batch of 50 teeth (E1, E2, E3, E4) was randomly selected to evaluate the onset of the rotary preparation of young operators. Two independent evaluators analyzed the array radiologically by stereomic...

Research paper thumbnail of Stereomicroscopic and Microscopic Study of Dental Structural Aspects Derived from Iatrogenic and Pathological Processes Suffered by a Second Mandibular Premolar - A Case Study

Journal of Medicine and Life, 2020

Microscopic studies performed on extracted human teeth after their preparation in advance is help... more Microscopic studies performed on extracted human teeth after their preparation in advance is helpful in a relatively good reestablishment of the treatment steps that have been applied to these teeth, as well as an evaluation of the quality of such treatments. Therefore, we have used stereo- and optical microscopy, highlighting aspects of external morphology, as well as root canal space of an extracted mandibular second premolar, subjected to prosthetic and endodontic treatment. In order to verify some technical errors that might occur during the endodontic and restorative treatment, we tried to appreciate the quality of the root canal filling and cervical defect and access cavity restoration of an extracted premolar #45.Without having the data from clinical records, we concluded that the method used for root canal filling was the warm lateral condensation technic; we also appreciated the quality of the fusion of the gutta-percha cones used, so the introduction of heated spreaders on...

Research paper thumbnail of Fracture resistance of endodontically treated teeth restored with resin post reinforced with glass fiber

Journal of Medicine and Life, 2021

This study aims to determine whether the design of resin posts reinforced with glass fiber (FRC) ... more This study aims to determine whether the design of resin posts reinforced with glass fiber (FRC) and Reporfost (Angelus, Londrina, PR, Brazil) significantly improves the fracture resistance of endodontically treated teeth restored through this method.A batch of 30 maxillary monoradicular teeth (15 central incisors, 15 canines) were treated endodontically by step-back technique (apical enlargement 40-K file) sealed with Sealapex (Kerr Corporation, Orange, US) and gutta-percha by lateral condensation, cold. They were divided into two equal groups, prepared for cementing the FRC posts. The Exacto posts (Angelus, Londrina, PR, Brazil) in group 1 and the Reforpost posts (Angelus; Londrina; PR, Brazil) were cemented with dual cure resin cement Breeze Self-Adhesive Resin Cement (Pentron Clinical, Orange, US). Fracture resistance testing was performed on the crown-apical axial direction, using the Hounsfield / Tinius Olsen H1-KS, PA, USA mechanical testing apparatus. The behavior of each to...

Research paper thumbnail of A microscopic study on the intercanalar isthmuses of the maxillary premolars and associated iatrogenic cracks

Romanian Biotechnological Letters, 2020

The purpose of this microscopic investigation, using stereomicroscopy and light transmited micros... more The purpose of this microscopic investigation, using stereomicroscopy and light transmited microscopy was to evaluate the configuration of the endodontic treated maxillary premolars, making correlations between the presence of the intercanalar isthmuses and also, to identify possible associated fracture lines. We also evaluated the thickness of the tertiary dentinal layer (irritation dentin layer). The study was based on microscopic investigation on thin sections on fragments or separate preparations resulting from 12 premolars that were clinically compromised. The tertiary dentin is deposited in response to irritations and moderate intensity injuries. As the tendency of crack propagation is directed to the areas corresponding to the root canal towards one of the root surfaces (which is the closest) the crackline – almost without exception, is more or less arched, without detecting an eventual crack in a straight line.

Research paper thumbnail of Reputed Dentists and / or Specialists in the Oro-Maxillo-Facial Field Who Worked in French Civil and Military Hospitals During the First World War (1914-1918)

The First World War was and is considered the most terrible conflagration of all time. Thus, over... more The First World War was and is considered the most terrible conflagration of all time. Thus, over 65,000,000 soldiers made up the corps of land armies, naval and air forces, combat armies that participated in the conduct of military operations during the First World War. About 8,500,000 people died and more than 21,000,000 were injured. France was one of the countries most affected by this war, its medical services, including dentistry and oral and maxillofacial surgery, being completely obsolete. Thus, in this material, we tried to describe some important figures of French oral and maxillofacial dentistry and surgery, which were active in French civil and military hospitals during the First World War (1914-1918).

Research paper thumbnail of Fracture resistance of endodontically treated teeth restored with resin post reinforced with glass fiber

Journal of Medicine and Life

This study aims to determine whether the design of resin posts reinforced with glass fiber (FRC) ... more This study aims to determine whether the design of resin posts reinforced with glass fiber (FRC) and Reporfost (Angelus, Londrina, PR, Brazil) significantly improves the fracture resistance of endodontically treated teeth restored through this method.A batch of 30 maxillary monoradicular teeth (15 central incisors, 15 canines) were treated endodontically by step-back technique (apical enlargement 40-K file) sealed with Sealapex (Kerr Corporation, Orange, US) and gutta-percha by lateral condensation, cold. They were divided into two equal groups, prepared for cementing the FRC posts. The Exacto posts (Angelus, Londrina, PR, Brazil) in group 1 and the Reforpost posts (Angelus; Londrina; PR, Brazil) were cemented with dual cure resin cement Breeze Self-Adhesive Resin Cement (Pentron Clinical, Orange, US). Fracture resistance testing was performed on the crown-apical axial direction, using the Hounsfield / Tinius Olsen H1-KS, PA, USA mechanical testing apparatus. The behavior of each to...

Research paper thumbnail of Evaluation of the sealer/gutta-percha ratio on sets of root section surfaces of some extracted teeth sealed using the cold lateral condensation technique

Journal of Medicine and Life

Canal filling must be well adapted to the walls of the root canal to prevent bacterial infiltrati... more Canal filling must be well adapted to the walls of the root canal to prevent bacterial infiltration. Endodontic seals play an essential role in ensuring tightness, without which the canal filling would suffer infiltrations. This study aimed to evaluate the areas occupied by the two components of the canal filling, as well as the sealer/gutta-percha ratio in the root canals of the maxillary central incisors after their filling using the cold lateral condensation technique with gutta-percha. Thirty extracted upper central incisors were rotatably prepared with ProTaper Universal up to F3 and sealed using the cold lateral condensation technique with gutta-percha. After setting the sealer, the roots of the teeth were sectioned perpendicularly to 1 (L1), 3 (L3), 6 (L6), and 8 (L8) mm from the apex. The surface of the sections was analyzed with a Leica EZ4D stereomicroscope and photographed at two magnification orders: 10x and 25x. The areas corresponding to the gutta-percha, sealer, gaps,...

Research paper thumbnail of Hopeless tooth? Prognosis and comprehensive treatment. A case report

Journal of Medicine and Life

A hopeless tooth from a periodontal point of view, with severe bone resorption, mobility and abno... more A hopeless tooth from a periodontal point of view, with severe bone resorption, mobility and abnormal tooth migration, is often extracted. In advanced cases, function and esthetics are impaired, and an interdisciplinary treatment is requested. Retaining or not these teeth is based on clinician judgment. A growing body of evidence claims that prognosis has great potential to be improved in a motivated patient with good oral hygiene and regular maintenance. This case report aims to present a periodontal regenerative technique combining enamel matrix protein derivatives and a particulated xenograft to treat intraosseous defects caused by periodontitis. The patient healed uneventfully, and no complications were recorded after the surgical procedure. To correct abnormal tooth migration and improve function and esthetics, orthodontic treatment was instituted. Tooth prognosis improved from hopeless to questionable. This approach extended the life span of a compromised tooth, improving peri...

Research paper thumbnail of Theoretical and Practical Aspects of Sedentary Behavior Among Medical Professions in the Field of Dentistry – Part I

Romanian Medical Journal

Sedentary behavior, both professional, occupational, and leisure, recreational, is one of the maj... more Sedentary behavior, both professional, occupational, and leisure, recreational, is one of the major risk factors for cardio-metabolic health and premature mortality. But we find this sedentary behavior in many of the existing professional activities in 2021, among which are the professional activities with a medical profile in the field of dentistry: specific activities of the dental office (and here we discuss dentists and dental nurses) and activities specific to the dental technique laboratory (in this case, we are talking about dental technicians).

Research paper thumbnail of Aspects related to dental practice in Romania during the COVID-19 pandemic

Romanian Journal of Stomatology

Aspecte legate de practica stomatologică din România în perioada pandemiei COVID-19 marina imre 1... more Aspecte legate de practica stomatologică din România în perioada pandemiei COVID-19 marina imre 1 , Silviu Mirel Pițuru 2 , Alexandra totan 3 , mihaela pantea 4 , mihaela chirila 5 ,

Research paper thumbnail of Microscopic study of endodontic ledges on extracted teeth

Romanian Biotechnological Letters