1.A study on fitness of several domestic implant fixture and abutment screws.
Young Sun PARK ; Mong Sook VANG ; Seok Hyung LEE
The Journal of Korean Academy of Prosthodontics 2004;42(1):94-109
STATEMENT OF PROBLEM: Several domestic dental implants have been developed since dental treatment being implants are increasing and popularized. However, they have not been used in domestic market like imported goods. MATERIAL AND METHODS: This study was carried out to compare domestic and imported implants in aspect of fitness, dental implant fixture and abutment screw using scanning electron microscope. All experiments were performed under dry condition. RESULTS: 1. Only in aspect of relation of dental implant fixture and abutment screw, except only one group with point contact, good fitness was existed. 2. Home products must presevere in their efforts, so as excellent to fit.
Dental Implants
3.Analysis on Focus of Clinical Evaluation of Dental Implants (Systems).
Jiaxin TIAN ; Weilu CHENG ; Qing ZHANG ; Yidan ZHANG ; Jiaying GUO ; Yinghui LIU
Chinese Journal of Medical Instrumentation 2022;46(1):84-87
From the perspective of technical evaluation, this article introduces the focus of clinical evaluation of dental implants (systems) in comparison with the comparable devices and discusses the clinical evaluation of such products,combined with the clinical evaluation review of dental implants (systems) products in recent years, in order to provide reference for the registration of these products.
Dental Implants
4.Influence of implant misplacement on the success of the final prosthesis: Subjective evaluation by a prosthodontist of dental implants placed by an oral and maxillofacial surgeon.
Young Kyun KIM ; Jung Won HWANG ; Hyo Jung LEE ; In Sung YEO ; Pil Young YUN
Journal of the Korean Association of Oral and Maxillofacial Surgeons 2009;35(6):437-441
PURPOSE: In many cases, the erroneous placement of a dental implant brings about undesirable results. Here, the effect of dental implant placement on the success of the final prosthesis was evaluated from the point of view of the prosthodontist. MATERIALS AND METHODS: All surgical operations were performed by the same oral surgeon with the same surgical protocol and all prosthodontic procedures were performed by the same prosthodontist. The problems faced by the prosthodontist, their causes, and their effect on prosthesis success were identified. The success of the final prostheses was evaluated by the same prosthodontist. RESULTS: Only 53% (238 implants in 105 patients) of dental implants were not associated with prosthodontic problems. Multiple implant placement (more than three implants) was associated more frequently with prosthodontic problems. CONCLUSIONS: The data indicate that the satisfactory construction of a prosthesis is highly dependent on the placement of the dental implant in the best possible position. It is strongly recommended that the oral surgeon and the prosthodontist engage in pre-operative discussions to establish a topdown treatment plan, as this will improve implant placement and ultimately the success of the prosthesis.
Dental Implants
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Prostheses and Implants
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Prosthodontics
5.A stress analysis of fixed prostheses with dental implant and natural tooth.
The Journal of Korean Academy of Prosthodontics 1993;31(3):447-459
No abstract available.
Dental Implants*
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Prostheses and Implants*
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Tooth*
6.A COMPARISON OF ACCURACY BETWEEN FIXTURE IMPRESSION AND ABUTMENT IMPRESSION FOR DENTAL IMPLANTS.
Hyun Sik CHOI ; Soon Ho YIM ; In Ho CHO
The Journal of Korean Academy of Prosthodontics 1997;35(4):662-673
The purpose of this study was to compare the accuracy between fixture impression and abutment impression using strain gauges. The master model used in this study was a partially edentulous mandibular metal cast with two fixture analogs on both sides. On the left, two fixture analogs were parallel, whereas right side, posterior fixture analog exhibiting a 15-degree lingual inclination. From master cast, 10 impression were made for each of the three impression methods. The master frameworks was fabricated on the master model, and two-element strain gauge was attached to a master framework. The master framework was seated on each cast, and gold screws were tightened to 10 Ncm using a torque controller. AI-1600 strain measurement system was used for strain maesuring. Impression methods studied were : Group 1:abutment impression Group 2:fixture impression Group 3:combined impression (anterior:fixture impression, posterior:abutment impression) The results were as followed. 1. The strain values on X-axis and Y-axis according to the three impression methods showed no significant difference. 2. The strain values on parallel and angulated groups according to the three impression methods showed no significant difference. 3. The parallel group exhibited significantly higher accuracy in adaptation than angulated group for all experimental groups (p<0.05). In conclusion, it is considered that accuracy of implant prostheses is more affected by implant angulation than impression methods.
Dental Implants*
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Prostheses and Implants
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Torque
7.Repairment of abutment and abutment screw fracture in implant prosthesis: A case report.
Jae Hoon KIM ; Jin Joo YOO ; Man Yong KIM ; Joon Ho YOON
The Journal of Korean Academy of Prosthodontics 2019;57(1):37-41
Dental implants are an effective and predictable treatment for restoration of missing teeth. However, as the use of implants increases, complications are also increasing. The mechanical complications are not only highly frequent, but also increasing as life span of an implant increases, thus, solutions should be prepared. In this report, we will present a case dealing with abutment fracture and abutment screw fracture which are the most common mechanical complication of the implant, focusing on preserving and reusing existing components by reconstructing only the damaged parts.
Dental Implants
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Prostheses and Implants*
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Tooth
8.A study on the effect of rotational speeds of the trephine mill on the temperature of surrounding bone during dental implantation procedure and osseointegration of implants.
Jin Geol LEE ; Jae Ho YANG ; Sun Hyung LEE
The Journal of Korean Academy of Prosthodontics 1992;30(2):167-189
No abstract available.
Dental Implantation*
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Dental Implants*
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Osseointegration*
9.A histological study of surrounding bone tissue reaction to hydroxy apatite coated dental implant.
Joon Ki SONG ; Sung Joo HUR ; In Ho CHO
The Journal of Korean Academy of Prosthodontics 1991;29(2):23-34
No abstract available.
Bone and Bones*
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Dental Implants*
10.PERIOTESTa ASSESSMENT OF DENTAL IMPLANT MOBILITY: A CLINCAL STUDY.
The Journal of Korean Academy of Prosthodontics 1998;36(5):758-771
Assessment of implant mobility is an important and reliable method to clinically evaluate implant stability. PerioTest is a precise and reproducible device that cam dynamically measure the reaction of damping characteristics of peri-implant tissue. The aim of this study is to evaluate the effects of amount of implant surface area, diameter, type, implantation site, degrees of cortical engagement, and length of time in function on PTVs and to find out the most determining factor on PTVs. The results are as follows 1. 5.0mm diameter implants show significantly lower PTV than that of 3.75mm diameter implants. 2. PTV in the mandible is significantly lower than that of the maxilla 3. In the maxilla, there is no significant difference in PTV during the first year of implant function, but during the second year a significant decrease in PTV is noted. 4. In the mandible, there is a significant decrease in PTV during the first and second year of implant function. 5. Implantation site seems to be the most determining factor on PTV among the influencing factors in this study. In conclusion, the amount of implant surface area, type, degrees of cortical engagement had no significant effect on PTV, but installation site and diameter influenced significantly on PTV
Dental Implants*
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Mandible
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Maxilla