mihai david | Universiti Teknologi Mara (original) (raw)
Papers by mihai david
Dental services market in Romania is growing and the development is not always based on careful r... more Dental services market in Romania is growing and the development is not always based on careful research of the market so that the offer could reflect the desire and demand of services. The purpose of this study is outlining a marketing strategy more efficient and productive for dentistry. Materials and methods: For this study, a structured questionnaire was used, which was applied to 148 subjects. The results of the questionnaire outline a clear picture of patients' needs concerning attention given to health care from the perspective of patient preferences regarding location, atmosphere and dental treatment stimulation by offering bonuses. Conclusions: Dental treatment market is ruled by patient's income and the cost of dental treatment. Furthermore, patients respond positively to loyalty programs in dental treatment and become sensitive when educational programs are designed with interdictions or restrictive advices.
Presse médicale (Paris, France : 1983)
Radiation Protection Dosimetry, 2003
Peripheral blood samples obtained from a normal healthy volunteer were exposed in vitro to gamma ... more Peripheral blood samples obtained from a normal healthy volunteer were exposed in vitro to gamma radiation with various doses at different dose rates of 1.0, 0.1 and 0.0014 Gy min(-1). The exposed samples were analysed for different chromosomal aberrations such as dicentrics (DC), centric rings (CR) and double-minutes (DM). The ratio of DC chromosomes (inter) to the total number of centric rings (CR) and double-minutes (DM) (CR + DM = intra) were analysed for all the three dose rates. The study showed that the frequency of inter-arm chromosomal aberrations was more then three times higher than that observed with intra-arm chromosomal aberrations in samples exposed at a dose rate of 1.0 and 0.1 Gy min (-1). However, the frequency of inter- and intra-arm chromosomal aberrations were almost same (ratio 1:1) in samples exposed at a dose rate of 0.0014 Gy min(-1). This paper discusses the usefulness of the ratio of inter- and intra-arm chromosome aberration in finding out whether the sample was exposed to high or low dose rate radiation.
La semaine des hôpitaux : organe fondé par l'Association d'enseignement médical des hôpitaux de Paris, Jan 4, 1959
Revista Română de Drept Privat, 2019
Acta Medica Transilvanica, 2021
When talking about dental assistance we actually refer to the prevention, detection and treatment... more When talking about dental assistance we actually refer to the prevention, detection and treatment of diseases of the oral and maxillo-facial region which, in most cases, have as a starting point or interest the dento-maxillary system. In this material, we tried to present a comparative study on the typology and complexity of different stages of dental treatments that can be performed in urban areas, compared to various stages of dental treatments that are performed and / or could be made in rural dental offices from in Romania.
We deem that the marketing concept in dental technique may be applied both to an individual denta... more We deem that the marketing concept in dental technique may be applied both to an individual dental technique laboratory being strictly meant to dental practices, or it may be applied to a welldefined structure of dental practicedental technique laboratory (or to a dentistdental technician team). In this preliminary study, based on two distinct questionnaires applied to both, a group of dentists and a group of dental technicians, we have tried to outline, as far as possible, a future marketing strategy as efficient and productive as possible for the dental technique laboratories.
Rezumat: După tratamentul uzual de carie simplă, apare destul de frecvent o complicaţie neplăcută... more Rezumat: După tratamentul uzual de carie simplă, apare destul de frecvent o complicaţie neplăcută, cunoscută sub numele de hipersensibilitate dureroasă postoperatorie. Scopul lucrării este acela de a atrage atenţia asupra acestei complicaţii destul de frecventă şi de puţin cunoscută de către medicul dentist. Această afecţiune prezintă o varietate de manifestări clinice, factori etiologici diverşi şi mecanisme diferite de producere. Metoda de lucru a constat în examinarea unui număr de 104 pacienţi de ambe sexe şi vârste cuprinse între 23-40 ani, care s-au prezentat pentru tratament de carie simplă în cadrul Universităţii de Medicină şi Farmacie "Carol Davila" Bucureşti, urmăriţi fiind pe o perioadă de 3 luni de la efectuarea tratamentului. Am luat în studiu doar leziuni carioase cu localizare ocluzală la nivelul molarilor, aceştia fiind restauraţi cu materiale compozite. Examinarea pacienţilor a fost efectuată prin chestionar, care a cuprins un examen clinic, privind relatarea subiectivă a pacientului, cu privire la prezenţa durerii postoperatorii, profunzimea şi întinderea preparaţiei, starea restaurării, sensibilitatea la stimulul rece şi cea tactilă efectuată de examinator, durata şi intensitatea durerii, toate evaluate după un scor de la 0 la 3. Rezultatele studiului au fost sistematizate în studiu, iar discuţiile asupra acestora au luat în considerare date din literatura de specialitate studiată. Concluziile au evidenţiat varietatea manifestărilor clinice ale durerii postoperatorii, dependenţa sa de o serie de factori individuali, de profunzimea cavităţii şi respectarea unei tehnici corecte de preparare şi restaurare.
Keywords: flapless surgery, cone beam computed tomography (CBCT), computer-aided design/ computer... more Keywords: flapless surgery, cone beam computed tomography (CBCT), computer-aided design/ computer aided manufacturing (CAD/CAM) stereolitographic template Abstract: Computer aided implant planning and placement has been developed in the past years allowing for more efficient preoperative patient evaluation and safe restorative driven implant insertion. The use of a computer based surgical template allows to use the advantages of state-of-the-art flapless surgery including reduced postoperative pain and swelling, reduced intraoperative bleeding, preservation of soft and hard tissue and maintenance of periosteal blood supply. The aim of this prospective study was to present a predictable protocol for dental implants insertion with the use of a stereolitographic guide for flapless surgery and immediate or conventional loading based on a bone quality assessment. Material and methods: Four consecutive patients partially dentate and fully edentulous were planned and operated using a compu...
The aim of this study is to provide an overview of management in the dental laboratory activity. ... more The aim of this study is to provide an overview of management in the dental laboratory activity. Materials and methods. The research was based on a prospective survey implemented using a questionnaire with 10 questions applied to a sample of 20 laboratories. The results obtained show the complexity of actions and decisions involved in the managerial process, with a medium and long-term action and development plan. Conclusions. The managerial plan of the dental laboratory should be based on long-term development using highly qualified staff and good communication between the laboratory and dental office.
In odontology, cervical carious lesions represent a distinct entity because of the morphological ... more In odontology, cervical carious lesions represent a distinct entity because of the morphological and physiological particularities of the area; their therapy poses problems related to the viability and duration of restorations. The aim of the present paper is to highlight the deficiencies that may occur over time in cervical composite or amalgam restorations. The material is represented by 105 three-year-old cervical restorations, more exactly 59 composite and 46 silver-amalgam restorations. The method is represented by a clinical-statistical analysis of the restorations, considering the patients' gender and age (patients in the 20-60+ age bracket). The clinical status of restorations is assessed comparatively for the 2 restorative materials to meet 8 criteria, 6 common to the 2 types of restorations and 2 specific to each type of restoration. The results of the study show that, in the case of 3-year-old restorations, there are more or less important deficiencies, both common an...
Acta Medica Transilvanica, 2021
Flexible dentures are an increasingly interesting prosthetic alternative both for dental practiti... more Flexible dentures are an increasingly interesting prosthetic alternative both for dental practitioners (dentists and dental technicians), but also for patients. This type of prosthetic restoration can rehabilitate a wide range of edentulous, but the financial effort that patients have to make is more consistent than in the case of a partial acrylic dentures. In this study, we will try to present some essential aspects in the technology of creating flexible partial dentures.
Cuvinte cheie: canal mandibular, edentație totală, m ă nunchi vasculo-nervos Rezumat: Absența uno... more Cuvinte cheie: canal mandibular, edentație totală, m ă nunchi vasculo-nervos Rezumat: Absența unor programe eficiente de prevenție dentară conduce către o înmulțire a pacienților cu edentații uni-sau pluri-dentare. La pacienții edentați total, apar dificultăți tehnice și clinice de protezare, datorită unei atrofii osoase accentuate. În funcție de restructurările mandibulare consecutive vârstei și edentației, canalul mandibular prezintă modificări de calibru (se reduce) și poziție (se apropie de marginea alveolară a mandibulei). Varianta protezării cu ajutorul implanturilor dentare a unor astfel de cazuri, suportă o serie de contraindicații de ordin loco-regional. Lucrarea de față a luat în studiu un număr de 32 de tomografii computerizate, pe baza cărora s-a putut stabili poziția atât în sens craniocaudal, cât și în sens vestibulo-oral a canalului mandibular. De asemenea, tomografia computerizată prezintă și relația găurii mentoniere cu creasta edentată. Raportul canalului mandibular cu marginea alveolară a mandibulei, prezintă o importanță deosebită în stabilirea planului de tratament al pacientului. Zona de siguranță clinică trebuie stabilită în raport cu topografia canalului mandibular, astfel încât nici osteotomia și nici inserarea unui implant dentar, să nu lezeze în niciun fel integritatea pachetului vasculo-nervos alveolar inferior.
Romanian Medical Journal, 2020
Introduction. In general, implant-prosthetic restorations, whether they are fixed or mobile, and ... more Introduction. In general, implant-prosthetic restorations, whether they are fixed or mobile, and regardless of their location (maxillary or mandibular), imply slightly different design and conceiving criteria, compared to the conventional prosthetic restorations already known. Purpose. In this material we tried to present some general and particular aspects regarding the design and manufacture of fixed implant-prosthetic restorations. Material and method. The study took place between September and December 2019 with the help of 31 dentists from Bucharest. Results and discussions. Following the application of the questionnaire, we were able to outline some aspects, frequently encountered in practice, by dentists who perform implant-prosthetic restorations related to occlusal balancing and the forces that appear at the level of implant restorations. Conclusions. The correct analysis and evaluation of the occlusal contacts and forces, leads to an increase in the life expectancy of prosthetic work as well as of their support (dental or implant).
L'invention concerne un procede et un systeme servant a detecter la presence et/ou a determin... more L'invention concerne un procede et un systeme servant a detecter la presence et/ou a determiner la concentration de certaines substances a analyser. Le procede selon l'invention consiste a recevoir dans une chambre de mesure un echantillon contenant une substance a analyser cible, la chambre de mesure comprenant une paire d'electrodes (42a-b) dont au moins une (42a) est compatible avec des mesures optiques, agissant comme capteur photosensible connecte a un analyseur optique (32); a appliquer un champ d'activation oscillant (par ex. magnetique, electromagnetique, mecanique) a la chambre de mesure (12), le champ applique oscillant a une premiere frequence; a mesurer une impedance electrique cible de la paire d'electrodes (42a-b), l'impedance indiquant un changement de position de la substance a analyser cible (60) en reponse a l'application du champ d'activation oscillant, la mesure de l'impedance electrique cible consistant a appliquer un signal e...
Dental services market in Romania is growing and the development is not always based on careful r... more Dental services market in Romania is growing and the development is not always based on careful research of the market so that the offer could reflect the desire and demand of services. The purpose of this study is outlining a marketing strategy more efficient and productive for dentistry. Materials and methods: For this study, a structured questionnaire was used, which was applied to 148 subjects. The results of the questionnaire outline a clear picture of patients' needs concerning attention given to health care from the perspective of patient preferences regarding location, atmosphere and dental treatment stimulation by offering bonuses. Conclusions: Dental treatment market is ruled by patient's income and the cost of dental treatment. Furthermore, patients respond positively to loyalty programs in dental treatment and become sensitive when educational programs are designed with interdictions or restrictive advices.
Presse médicale (Paris, France : 1983)
Radiation Protection Dosimetry, 2003
Peripheral blood samples obtained from a normal healthy volunteer were exposed in vitro to gamma ... more Peripheral blood samples obtained from a normal healthy volunteer were exposed in vitro to gamma radiation with various doses at different dose rates of 1.0, 0.1 and 0.0014 Gy min(-1). The exposed samples were analysed for different chromosomal aberrations such as dicentrics (DC), centric rings (CR) and double-minutes (DM). The ratio of DC chromosomes (inter) to the total number of centric rings (CR) and double-minutes (DM) (CR + DM = intra) were analysed for all the three dose rates. The study showed that the frequency of inter-arm chromosomal aberrations was more then three times higher than that observed with intra-arm chromosomal aberrations in samples exposed at a dose rate of 1.0 and 0.1 Gy min (-1). However, the frequency of inter- and intra-arm chromosomal aberrations were almost same (ratio 1:1) in samples exposed at a dose rate of 0.0014 Gy min(-1). This paper discusses the usefulness of the ratio of inter- and intra-arm chromosome aberration in finding out whether the sample was exposed to high or low dose rate radiation.
La semaine des hôpitaux : organe fondé par l'Association d'enseignement médical des hôpitaux de Paris, Jan 4, 1959
Revista Română de Drept Privat, 2019
Acta Medica Transilvanica, 2021
When talking about dental assistance we actually refer to the prevention, detection and treatment... more When talking about dental assistance we actually refer to the prevention, detection and treatment of diseases of the oral and maxillo-facial region which, in most cases, have as a starting point or interest the dento-maxillary system. In this material, we tried to present a comparative study on the typology and complexity of different stages of dental treatments that can be performed in urban areas, compared to various stages of dental treatments that are performed and / or could be made in rural dental offices from in Romania.
We deem that the marketing concept in dental technique may be applied both to an individual denta... more We deem that the marketing concept in dental technique may be applied both to an individual dental technique laboratory being strictly meant to dental practices, or it may be applied to a welldefined structure of dental practicedental technique laboratory (or to a dentistdental technician team). In this preliminary study, based on two distinct questionnaires applied to both, a group of dentists and a group of dental technicians, we have tried to outline, as far as possible, a future marketing strategy as efficient and productive as possible for the dental technique laboratories.
Rezumat: După tratamentul uzual de carie simplă, apare destul de frecvent o complicaţie neplăcută... more Rezumat: După tratamentul uzual de carie simplă, apare destul de frecvent o complicaţie neplăcută, cunoscută sub numele de hipersensibilitate dureroasă postoperatorie. Scopul lucrării este acela de a atrage atenţia asupra acestei complicaţii destul de frecventă şi de puţin cunoscută de către medicul dentist. Această afecţiune prezintă o varietate de manifestări clinice, factori etiologici diverşi şi mecanisme diferite de producere. Metoda de lucru a constat în examinarea unui număr de 104 pacienţi de ambe sexe şi vârste cuprinse între 23-40 ani, care s-au prezentat pentru tratament de carie simplă în cadrul Universităţii de Medicină şi Farmacie "Carol Davila" Bucureşti, urmăriţi fiind pe o perioadă de 3 luni de la efectuarea tratamentului. Am luat în studiu doar leziuni carioase cu localizare ocluzală la nivelul molarilor, aceştia fiind restauraţi cu materiale compozite. Examinarea pacienţilor a fost efectuată prin chestionar, care a cuprins un examen clinic, privind relatarea subiectivă a pacientului, cu privire la prezenţa durerii postoperatorii, profunzimea şi întinderea preparaţiei, starea restaurării, sensibilitatea la stimulul rece şi cea tactilă efectuată de examinator, durata şi intensitatea durerii, toate evaluate după un scor de la 0 la 3. Rezultatele studiului au fost sistematizate în studiu, iar discuţiile asupra acestora au luat în considerare date din literatura de specialitate studiată. Concluziile au evidenţiat varietatea manifestărilor clinice ale durerii postoperatorii, dependenţa sa de o serie de factori individuali, de profunzimea cavităţii şi respectarea unei tehnici corecte de preparare şi restaurare.
Keywords: flapless surgery, cone beam computed tomography (CBCT), computer-aided design/ computer... more Keywords: flapless surgery, cone beam computed tomography (CBCT), computer-aided design/ computer aided manufacturing (CAD/CAM) stereolitographic template Abstract: Computer aided implant planning and placement has been developed in the past years allowing for more efficient preoperative patient evaluation and safe restorative driven implant insertion. The use of a computer based surgical template allows to use the advantages of state-of-the-art flapless surgery including reduced postoperative pain and swelling, reduced intraoperative bleeding, preservation of soft and hard tissue and maintenance of periosteal blood supply. The aim of this prospective study was to present a predictable protocol for dental implants insertion with the use of a stereolitographic guide for flapless surgery and immediate or conventional loading based on a bone quality assessment. Material and methods: Four consecutive patients partially dentate and fully edentulous were planned and operated using a compu...
The aim of this study is to provide an overview of management in the dental laboratory activity. ... more The aim of this study is to provide an overview of management in the dental laboratory activity. Materials and methods. The research was based on a prospective survey implemented using a questionnaire with 10 questions applied to a sample of 20 laboratories. The results obtained show the complexity of actions and decisions involved in the managerial process, with a medium and long-term action and development plan. Conclusions. The managerial plan of the dental laboratory should be based on long-term development using highly qualified staff and good communication between the laboratory and dental office.
In odontology, cervical carious lesions represent a distinct entity because of the morphological ... more In odontology, cervical carious lesions represent a distinct entity because of the morphological and physiological particularities of the area; their therapy poses problems related to the viability and duration of restorations. The aim of the present paper is to highlight the deficiencies that may occur over time in cervical composite or amalgam restorations. The material is represented by 105 three-year-old cervical restorations, more exactly 59 composite and 46 silver-amalgam restorations. The method is represented by a clinical-statistical analysis of the restorations, considering the patients' gender and age (patients in the 20-60+ age bracket). The clinical status of restorations is assessed comparatively for the 2 restorative materials to meet 8 criteria, 6 common to the 2 types of restorations and 2 specific to each type of restoration. The results of the study show that, in the case of 3-year-old restorations, there are more or less important deficiencies, both common an...
Acta Medica Transilvanica, 2021
Flexible dentures are an increasingly interesting prosthetic alternative both for dental practiti... more Flexible dentures are an increasingly interesting prosthetic alternative both for dental practitioners (dentists and dental technicians), but also for patients. This type of prosthetic restoration can rehabilitate a wide range of edentulous, but the financial effort that patients have to make is more consistent than in the case of a partial acrylic dentures. In this study, we will try to present some essential aspects in the technology of creating flexible partial dentures.
Cuvinte cheie: canal mandibular, edentație totală, m ă nunchi vasculo-nervos Rezumat: Absența uno... more Cuvinte cheie: canal mandibular, edentație totală, m ă nunchi vasculo-nervos Rezumat: Absența unor programe eficiente de prevenție dentară conduce către o înmulțire a pacienților cu edentații uni-sau pluri-dentare. La pacienții edentați total, apar dificultăți tehnice și clinice de protezare, datorită unei atrofii osoase accentuate. În funcție de restructurările mandibulare consecutive vârstei și edentației, canalul mandibular prezintă modificări de calibru (se reduce) și poziție (se apropie de marginea alveolară a mandibulei). Varianta protezării cu ajutorul implanturilor dentare a unor astfel de cazuri, suportă o serie de contraindicații de ordin loco-regional. Lucrarea de față a luat în studiu un număr de 32 de tomografii computerizate, pe baza cărora s-a putut stabili poziția atât în sens craniocaudal, cât și în sens vestibulo-oral a canalului mandibular. De asemenea, tomografia computerizată prezintă și relația găurii mentoniere cu creasta edentată. Raportul canalului mandibular cu marginea alveolară a mandibulei, prezintă o importanță deosebită în stabilirea planului de tratament al pacientului. Zona de siguranță clinică trebuie stabilită în raport cu topografia canalului mandibular, astfel încât nici osteotomia și nici inserarea unui implant dentar, să nu lezeze în niciun fel integritatea pachetului vasculo-nervos alveolar inferior.
Romanian Medical Journal, 2020
Introduction. In general, implant-prosthetic restorations, whether they are fixed or mobile, and ... more Introduction. In general, implant-prosthetic restorations, whether they are fixed or mobile, and regardless of their location (maxillary or mandibular), imply slightly different design and conceiving criteria, compared to the conventional prosthetic restorations already known. Purpose. In this material we tried to present some general and particular aspects regarding the design and manufacture of fixed implant-prosthetic restorations. Material and method. The study took place between September and December 2019 with the help of 31 dentists from Bucharest. Results and discussions. Following the application of the questionnaire, we were able to outline some aspects, frequently encountered in practice, by dentists who perform implant-prosthetic restorations related to occlusal balancing and the forces that appear at the level of implant restorations. Conclusions. The correct analysis and evaluation of the occlusal contacts and forces, leads to an increase in the life expectancy of prosthetic work as well as of their support (dental or implant).
L'invention concerne un procede et un systeme servant a detecter la presence et/ou a determin... more L'invention concerne un procede et un systeme servant a detecter la presence et/ou a determiner la concentration de certaines substances a analyser. Le procede selon l'invention consiste a recevoir dans une chambre de mesure un echantillon contenant une substance a analyser cible, la chambre de mesure comprenant une paire d'electrodes (42a-b) dont au moins une (42a) est compatible avec des mesures optiques, agissant comme capteur photosensible connecte a un analyseur optique (32); a appliquer un champ d'activation oscillant (par ex. magnetique, electromagnetique, mecanique) a la chambre de mesure (12), le champ applique oscillant a une premiere frequence; a mesurer une impedance electrique cible de la paire d'electrodes (42a-b), l'impedance indiquant un changement de position de la substance a analyser cible (60) en reponse a l'application du champ d'activation oscillant, la mesure de l'impedance electrique cible consistant a appliquer un signal e...