치아 임플란트에서 이비인후과의 역할

정진혁,김기태,정승규 대한비과학회 2008 Journal of rhinology Vol.15 No.2

In recent years, dental implants have become a frequently performed procedure in most dental clinics. The edentulous posterior maxilla provides a limited amount of bony volume due to atrophy of the alveolar ridge and pneumatization of the maxillary sinus. Consequently, dental implant placement in the posterior maxilla can be complicated and it becomes a matter for the otolaryngology field. However, for most otolaryngologists, knowledge of dental implantation is scarce. Therefore, consensus on the diagnosis and treatment associated with dental implants is needed. During consultation, before a dental implant, a nasal endoscope and paranasal sinus CT scan should be taken and any mucosal thickening, incidental polyps, acute sinusitis, chronic sinusitis, or malignancy should be differentiated and treated as needed. After the dental implant, acute sinusitis and migration of the dental implant into the maxillary sinus can occur because of damage to sinus mucosa or a foreign body reaction. These complications can be evaluated and treated more easily by an otolaryngologist than by a dentist. Nasal endoscopy and endoscopic sinus surgery can be applied to problems associated with dental implants. In recent years, dental implants have become a frequently performed procedure in most dental clinics. The edentulous posterior maxilla provides a limited amount of bony volume due to atrophy of the alveolar ridge and pneumatization of the maxillary sinus. Consequently, dental implant placement in the posterior maxilla can be complicated and it becomes a matter for the otolaryngology field. However, for most otolaryngologists, knowledge of dental implantation is scarce. Therefore, consensus on the diagnosis and treatment associated with dental implants is needed. During consultation, before a dental implant, a nasal endoscope and paranasal sinus CT scan should be taken and any mucosal thickening, incidental polyps, acute sinusitis, chronic sinusitis, or malignancy should be differentiated and treated as needed. After the dental implant, acute sinusitis and migration of the dental implant into the maxillary sinus can occur because of damage to sinus mucosa or a foreign body reaction. These complications can be evaluated and treated more easily by an otolaryngologist than by a dentist. Nasal endoscopy and endoscopic sinus surgery can be applied to problems associated with dental implants.

치과 임플란트 국민건강보험 급여화 이후 노인의 치과 임플란트 이용에 대한 예측 모형: 사회경제적 요인 중심으로

이상희,김규석,문혜영,강정윤 한국치위생학회 2024 한국치위생학회지 Vol.24 No.1

Objectives: The demand for dental care is expected to increase as the population ages. This study aimed to predict the utilization of dental implant care following the expansion of national health insurance benefits for dental implants. Methods: Multiple linear regression analysis was performed on HIRA big data open portal data and DNN-based artificial intelligence models to forecast the utilization of dental care in relation to the national health insurance coverage for dental implants. Results: National health insurance coverage of dental implants was found to be associated with the number of patients using dental implant services and demonstrated a statistical significance. The dental implant services utilization increased with the increased dental implant health insurance benefits for the elderly population, increased mean by region, increased number of dental institutions by region, and increased health insurance coverage rate for dental implants. However, the dental implant services utilization decreased with the increased number of older people living alone and increased size of dental institutions. Conclusions: With the expansion of the national health insurance coverage for dental implants, it is predicted that the utilization of dental implant medical services will increase in the future.

식립 보조도구를 이용한 3D 치아 임플란트 시술 시뮬레이션

박형욱(Hyung-Wook Park),김명수(Myong-Soo Kim),박형준(Hyungjun Park) (사)한국CDE학회 2012 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2012 No.2

Surgeon dentists usually rely on their experiential judgments from patients’ oral plaster casts and medical images to determine the positional and directional information of implant fixtures and to perform drilling tasks during dental implant surgical operations. This approach, however, may cause some errors and deteriorate the quality of dental implants. Computer-aided methods have been introduced as supportive tools to alleviate the shortcomings of the conventional approach. In this paper, we present an approach of 3D dental implant simulation which can provide the realistic and immersive experience of dental implant information. The dental implant information is primarily composed of several kinds of 3D mesh models obtained as follows. Firstly, we construct 3D mesh models of jawbones, teeth and nerve curves from the patient’s dental images using software MimicsTM. Secondly, we construct 3D mesh models of gingival regions from the patient’s oral impression using a reverse engineering technique. Thirdly, we select suitable types of implant fixtures from fixture database and determine the positions and directions of the fixtures by using the 3D mesh models and the dental images with software SimplantTM. Fourthly, from the geometric and/or directional information of the jawbones, the gingival regions, the teeth and the fixtures, we construct the 3D models of surgical guide stents which are crucial to perform the drilling operations with ease and accuracy. In the application phase, the dental implant information is combined with the tangible interface device to accomplish 3D dental implant simulation. The user can see and touch the 3D models related with dental implant surgery. Furthermore, the user can experience drilling paths to make holes where fixtures are implanted. A preliminary user study shows that the presented approach can be used to provide dental students with good educational contents. With future work, we expect that it can be utilized for clinical studies of dental implant surgery.

가토의 대퇴골에 이식된 치과용 임프란트 nProtect-447n의 골결합에 대한 연구

김태인,이재일,한준현,김형진 대한치과이식임플란트학회 2001 The Korean Academy of Implant Dentistry Vol.20 No.1

Osseointegrated dental implants are have used for the fixation of dental prosthesis with good long tern clinical results. The unique combination of tapered implant body with screw divided to three parts in Protect-447 dental implant system makes newly designed implant extremely strong initial stability, better stress distribution, less bone reduction during surgical procedure. The purpose of present study was to evaluate histomorphometric examination and removal torque value of newly developed dental implant Protect-447 in the femur of rabbits. After 12 weeks of healing of the implantation, bone contact ratio and bone regeneration rate for histomorphometric examination and removal torque values were compared to evaluate osseointegration properties of Protect-447 dental implant. Obtained results were as follows: 1. Protect-447 dental implants showed 59.8% of bone to implant contact ratio, whereas imported dental implants showed 54.5% (statistically no difference p<0.05). 2. Protect-447 dental implants showed mean bone regeneration rate 63.4%, whereas imported dental implants showed 49.7% (statistically difference p<0.05). 3. Protect-447 dental implants demonstrated mean removal torque values 40.5Ncm, whereas mean removal torque values of imported dental implants showed 39.3Ncm.

Current trends in dental implants

Laura Gaviria,John Paul Salcido,Teja Guda,Joo L. Ong 대한구강악안면외과학회 2014 대한구강악안면외과학회지 Vol.40 No.2

Tooth loss is very a very common problem; therefore, the use of dental implants is also a common practice. Although research on dental implant designs, materials and techniques has increased in the past few years and is expected to expand in the future, there is still a lot of work involved in the use of better biomaterials, implant design, surface modification and functionalization of surfaces to improve the long-term outcomes of the treatment. This paper provides a brief history and evolution of dental implants. It also describes the types of implants that have been developed, and the parameters that are presently used in the design of dental implants. Finally, it describes the trends that are employed to improve dental implant surfaces, and current technologies used for the analysis and design of the implants.

Design and fabrication of custom-made dental implants

Xianshuai Chen,Longhan Xie,Jianyu Chen,R. Du,Feilong Deng 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.7

Dental implant has been attracting more and more attention due to their advantages of reliability and comfort. It is estimated that 10%of people will need dental implants in their life time. Especially, companies offer a system for customer to choice. But, no one research on custom-made dental implants. Traditional implants have their limitation and they are not better fit due to the difference of patient’s oral condition. The advantages of custom implant are accuracy fit and esthetic emergence profile. So, custom-made implant is desirable. Another key problem of custom-made dental implant is manufacturing. Dental implant is difficult to machine due to its complex features and its material (titanium). With the ever increasing demand for tight tolerance and increased complexity and accuracy, traditional machine tools have become ineffective for machining them. So, we design and built a PC-based CNC Turn-Mill-Hob professional machining center for machining our custom-made dental implants accurately and efficiently. This paper introduces our method: firstly, the custom-made dental implant in various oral conditions is designed by using our implant database. And then, FEA results indicate the stress distribution and magnitude of implant-bone interface for dentist referring. Finally, samples are automatic machined by our machining center.

Brain MRI 검사 시 치아 임플란트 시술유무와 RF Pulse 세기에 따른 인체 영향에 관한 연구: XFDTD 프로그램을 이용

최대연(Dea-yeon Choe),김동현(Dong-Hyun Kim) 한국방사선학회 2017 한국방사선학회 논문지 Vol.11 No.5

Brain MRI 검사에서는 영상을 얻기 위해 RF Pulse를 인체에 조사하게 되는데 이때 조사된 RF Pulse 에너지의 상당 부분은 우리 몸에 그대로 흡수되게 되고 이로 인해 인체 온도가 상승하게 되는데 노출 정도에 따라 인체에 영향을 주게 된다. 이러한 RF Pulse 에너지는 MRI 장비의 발전으로 인해 자기장의 세기가 1.5 Tesla에서 3 Tesla, 3 Tesla에서 7 Tesla로 높아지는 시점에서 자기장의 세기 변화에 따른 두부 전체의 SAR와 온도의 변화를 알아보고 위의 결과가 치아 임플란트 사용 여부에 따른 결과의 차이를 알아보기 위해 연구를 시작하게 되었다. 실험은 인체 두부 모델에 1.5 Tesla MRI 장비에서 발생되는 64 MHz RF Pulse 주파수, 3.0 Tesla MRI 장비 에서 발생되는 128 MHz RF Pulse 주파수, 7 Tesla MRI 장비에서 발생되는 298 MHz RF Pulse 주파수를 조사하고 위의 실험을 치아 임플란트를 사용하였을 때와 사용하지 않았을 때로 나누어 XFDTD 프로그램을 사용하여 머리 주변의 SAR와 체온의 변화를 각각 실험하였다. 치아 임플란트를 하지 않았을 때보다 치아 임플란트를 하였을 때 SAR값은 7T의 RF Pulse 주파수 256MH z에서 최대 약 5800배의 차이를 나타냈으며 주파수가 증가할수록 치아 임플란트 사용으로 인한 SAR값의 차이는 크게 나타났다. 치아 임플란트를 하지 않았을 때보다 치아 임플란트를 하였을 때 두부전체의 온도 변화는 2배에서 최대 4배 가까운 온도 상승을 나타내었다. 또한 RF Pulse 주파수가 증가할수록 SAR값은 증가하지만, 두부 전체의 온도는 감소하였는데 이는 주파수가 증가할수록 파장이 작을수록 인체표면에 흡수 되는 양이 많아지기 때문이다. 향후 치아 임플란트 유무와 RF Pulse 주파수의 세기 변화로 인한 이상 반응 요인에 대한 연구를 통해 인체의 생리적 연구와 생화학적 연구 등 인체에 대한 영향과 관련하여 연구가 필요하다고 하겠다. In the Brain MRI, RF Pulse is irradiated on the human body in order to acquire an image. At this time, a considerable part of the irradiated RF Pulse energy is absorbed as it is in our body. This will raise the temperature of the human body, but depending on the extent of exposure, it will affect the human body. The change of the SAR and the temperature of the head according to the change of the magnetic field strength is examined. And to investigate the difference in results depending on the use of dental implant. In the human head model, 64 MHz RF Pulse frequency generated from 1.5 T, 128 MHz RF Pulse frequency generated from 3.0 T, and 298 MHz RF Pulse frequency generated from 7.0 T send a frequency and experiment was performed using dental implant using the XFDTD program, we measured the SAR and body temperature changes around the head. The SAR value showed up to about 5800 times the difference at the RF Pulse frequency of 256 MHz, when with dental implant than without dental implant and as the frequency increased, the use of the dental implant increased difference in the SAR value. The change of the temperature of the head showed a temperature rise nearly 2 to 4 times when with dental implant than without dental implant. As the RF Pulse frequency increase, the SAR value increase, but the change of the temperature of the head decrease. Because of as the frequency increase, wavelength is smaller and the more the amount absorbed by the surface of the human. Physiological and biochemical studies of the human body ar necessary through studies of the presence of dental implant and the cause of reaction caused by change in the RF Pulse frequency.

임플란트 표면에 따른 인공치면세균막 형성에 관한 연구

김진우(Jin-Woo Kim),한세진(Se-Jin Han),김경욱(Kyung-Wook Kim) 대한구강악안면외과학회 2008 대한구강악안면외과학회지 Vol.34 No.3

The purpose of this study was to evaluate the artificial dental plaque by Streptococcus mutans on 4 different implant surfaces. In this study, the specimens were divided into 4 groups according to implant surface treatment. Uncoated implant group(n=5) which has an uncoated, smooth surfaced implant(Osstem, Korea), SLA implant group(n=5) which has an sandblasted large grit and acid-etched surface implant(Bicon, USA). Oxidized implant group(n=5) which has an oxidized surfaced implant (Osstem, Korea), and RBM implant group(n=5) which has resorbable blasting media(RBM) surfaced implant(Osstem, Korea). Acquired pellicle by human saliva and dental plaque by Streptococcus mutans were made on each implant surface. To analyze the plaque condition on implants surfaces, cell count and optical density were taken as a microbiologic method, and SEM(Scanning Electronic Microscope) findings was also taken for evaluation of surface condition. The following results were obtained. 1. Cell counting results of artificial dental plaque were Uncoated group(658.0±102.0), RBM group(878.0±170.0), SLA group (946.0±42.0), Oxidized group(992.0±40.0), and there was difference between Oxidized group and Uncoated implant group(p<0.05). In case of modified cell counting results by v/w% were RBM group(197.8±45.2), Oxidized group(207.04±8.34), Uncoated group(261.6±40.6), SLA group(315.4±14.0), and there was difference between RBM group and SLA group(p<0.05). 2. Optical density results of artificial dental plaque after ultrasonic treatment was that there was difference among groups, and optical density of RBM group was higher than that of Uncoated group(p<0.05). In case of modified optical density results by v/w%, there was difference among groups, and the modified optical density of Uncoated group and SLA group was higher than those of Oxidized group and RBM group(P>0.05). 3. SEM findings of artificial dental plaque on the surfaces of implant as follows; there were artificial dental plaque on the surfaces of all test implants. Streptococcus mutans and by-product were observed at 10,000 times magnified condition on all test implants. Adhesion area of artificial dental plaque was about 1/2 of total surface after 24 hours incubate at 37℃. These results showed that there were differences among implant surfaces on the growth of Streptococcus mutans, and bacteria and by-product were covered about 1/2 area of total implant surfaces at 24 hours incubate at 37℃.

식립 보조도구를 이용한 3D 치아 임플란트 시술 시뮬레이션

박형욱(Hyung-Wook Park),김명수(Myong-Soo Kim),박형준(Hyungjun Park) (사)한국CDE학회 2011 한국CDE학회 논문집 Vol.16 No.3

Surgeon dentists usually rely on their experiential judgments from patients’ oral plaster casts and medical images to determine the positional and directional information of implant fixtures and to perform drilling tasks during dental implant surgical operations. This approach, however, may cause some errors and deteriorate the quality of dental implants. Computer-aided methods have been introduced as supportive tools to alleviate the shortcomings of the conventional approach. In this paper, we present an approach of 3D dental implant simulation which can provide the realistic and immersive experience of dental implant information. The dental implant information is primarily composed of several kinds of 3D mesh models obtained as follows. Firstly, we construct 3D mesh models of jawbones, teeth and nerve curves from the patient’s dental images using software Mimics™. Secondly, we construct 3D mesh models of gingival regions from the patient’s oral impression using a reverse engineering technique. Thirdly, we select suitable types of implant fixtures from fixture database and determine the positions and directions of the fixtures by using the 3D mesh models and the dental images with software Simplant™. Fourthly, from the geometric and/or directional information of the jawbones, the gingival regions, the teeth and the fixtures, we construct the 3D models of surgical guide stents which are crucial to perform the drilling operations with ease and accuracy. In the application phase, the dental implant information is combined with the tangible interface device to accomplish 3D dental implant simulation. The user can see and touch the 3D models related with dental implant surgery. Furthermore, the user can experience drilling paths to make holes where fixtures are implanted. A preliminary user study shows that the presented approach can be used to provide dental students with good educational contents. With future work, we expect that it can be utilized for clinical studies of dental implant surgery.

Review on finite element analysis of dental implants

Fatma Nur Büyük(Fatma Nur Büyük ),Efe Savran(Efe Savran ),Fatih Karpat(Fatih Karpat ) 대한치과이식임플란트학회 2022 The Korean Academy of Implant Dentistry Vol.41 No.3

Dental implants are structures of high importance, as in other implant studies used in the biomedical field. The jawbone is a structure of such importance that it affects the nutritional functions of the living thing with which it is integrated. Therefore, intervention in this structure is of high importance. Parts for use in the biomedical field can be produced using numerical analysis, thus saving time and cost. In addition, the level of trust increases in the living being where the dental implant is applied. This paper reviews studies using the finite element method for the numerical analysis of dental implants. The analysis revealed important conditions, such as groove type, material, osseointegration status, splinting, dimensions, neck region, and fatigue strength of the dental implant.