• 구강회복응용과학지
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• 제18권2호
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• pp.119-126
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• 2002

The purpose of this study was to restorate a patient who has a few remaining teeth with #15,23,24 supported Konus telescope denture in Maxillar and #44,43,33,34 supported Dolder bar retained overdenture in Mandible. Konus telescope and bar retained overdenture was taken better results in retention, support, stability compair with regular Removable partial denture. In Removable partial denture, the change of remaining teeth and edentulous ridge is natural. But Konus telescope and bar retained overdenture is a little effected in this change, so it is possiblble in long-term use. In cosider of patient's medical history and the possibility of additional tooth loss, Konus telescope denture can be easily repaired. Compaired with Konus telescope and bar retained overdenture showed high stability and easy cleansing because of rigid support, cross - arch splinting, and simple design. In delivery, patient had a difficulty with removal of denture and plaque control, but showed better condition, good oral hygienic care. Patient satisfied with denture functionally and esthetically. This study showed Konus telescope and bar retained overdenture was effective for treatment of patient remaing a few teeth in function, esthetic and psycologic satisfaction.

• The Journal of Advanced Prosthodontics
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• 제10권3호
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• pp.197-204
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• 2018

PURPOSE. To determine the extent of treatment traces, the roughness depth, and the quantity of titanium nitride (TiN) removed from the surface of CAD/CAM abutments after treatment with various instruments. MATERIALS AND METHODS. Twelve TiN coated CAD/CAM abutments were investigated for an in vitro study. In the test group (9), each abutment surface was subjected twice (150 g vs. 200 g pressure) to standardized treatment in a simulated prophylaxis measure with the following instruments: acrylic scaler, titanium curette, and ultrasonic scaler with steel tip. Three abutments were used as control group. Average surface roughness (Sa) and developed interfacial area ratio (Sdr) of treated and untreated surfaces were measured with a profilometer. The extent of treatment traces were analyzed by scanning electron microscopy. RESULTS. Manipulation with ultrasonic scalers resulted in a significant increase of average surface roughness (Sa, P<.05) and developed interfacial area ratio (Sdr, P<.018). Variable contact pressure did not yield any statistically significant difference on Sa-values for all instruments (P=.8). Ultrasonic treatment resulted in pronounced surface traces and partially detachment of the TiN coating. While titanium curettes caused predominantly moderate treatment traces, no traces or detectable substance removal has been determined after manipulation with acrylic curettes. CONCLUSION. Inappropriate instruments during regular plaque control may have an adverse effect on the integrity of the TiN coating of CAD/CAM abutments. To prevent defects and an increased surface roughness at the transmucosal zone of TiN abutments, only acrylic scaling instruments can be recommended for regular maintenance care.

• 대한치과보철학회지
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• 제36권2호
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• pp.258-272
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• 1998

This investigation evaluated patients who received Steri-Oss implants from the Dental Hospital of Chosun University during the period from March 1989 to August 1997. 346 fixtures of 127 patients were included in this study. The results were as follows ; 1.The follow-up period was defined as the period between the surgical placement of the implants and the last follow-up examination. The mean follow-up period was $2.17{\pm}1.21$ years. 2.The period between fixture installation and second surgery was $0.71{\pm}0.44$ years in the maxilla and $0.46{\pm}0.21$ years in the mandible. 3.The number of fixtures which were installed in the upper jaw(112) was less than that in the lower jaw(234) and in the posterior region(260) was more than in the anterior region(86). 4.The length of fixture which was most frequently used was 12 mm and least was 8mm. Screw implants were installed more than cylindrical implants. 3.8mm implant was the most common implans, followed by 4.5mm and 3.25mm. 5.The number of augmentation cases was more than that of non-augmentation cases and the rate of augmentation cases in the maxilla was more than that in the mandible. 6.Implant restorations for partial edentulos patients(94cases) were more than single- tooth implant restorations(33cases) or implant restorations for complete edentulos patients(10cases). 7.Free-standing prostheses for partially edentulous patients were more commom than any other type of connection between implants and natural teeth. 8.Plaque Index($0.95{\pm}0.74$) and Gingival Index($0.31{\pm}0.52$) were very similar around the natural teeth and reflected an acceptable level of plaque and gingivitis control. Mean value for keratinized mucosa index($1.93{\pm}1.20$) remained fairly constant around level 2(1-2 mm keratinized epithelium). 9.Patients were generally satisfied with implant in terms of comfort, function, speech and esthetics. 10.There was not a statistically significant differences in overall survial rate between implants placed in the maxilla (91.5%) and those placed in the mandible (93.8%). Fourteen implants lost before the prosthetic rehabilitation and eleven implants lost following variable periods in function after the prosthetic phase of the treatment. 11.Cause of implant failures was exfoliation or removal of fixture due to non-osseointegration before the prosthetic rehabilitation or due to fracture of fixture, masticatory pain after the prosthetic rehabilitation. 12.The survival rate of Steri-Oss implants using the Kaplan-Meier statistical analysis was 93.8% at 2 year and 86.6% at 5 year, In all cases, implant losses occured predominantly in the healing period. There was a steep decline in the rate of implant loss after the first year. 13.The survival rate of Steri-Oss implants in the anterior region was 94.8% at 2 year and 94.8% at 5 year and that in the posterior region was 92.8% at 2 year and 75.9% at 5 year. In conclusion, this study revealed a number of parameters and guidelines for achieving an optimal success rate in osseointegration.

• Journal of Periodontal and Implant Science
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• 제32권3호
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• pp.615-630
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• 2002

Various long-term studies have shown that titanium implants as abutments for different types of prostheses have become a predictable adjunct in the treatment of partially or fully edentulous patients. The continuous exposure of dental implants to the oral cavity with all its possible contaminants creates a problem. A lack of attachment, together with or caused by bacterial insult, may lead to peri-implantitis and eventual implant failure. Removal of plaque and calculus deposits from dental titanium implants with procedures and instruments originally made for cleaning natural teeth or roots may cause major alterations of the delicate titanium oxide layer. Therefore, the ultimate goal of a cleaning procedure should be to remove the contaminants and restore the elemental composition of the surface oxide without changing the surface topography and harming the surrounding tissues. Among many chemical and mechanical procedure, air-powder abrasive have been known to be most effective for cleaning and detoxification of implant surface. Most of published studies show that the dental laser may be useful in the treatment of pen-implantitis. $CO_2$ laser and Soft Diode laser were reported to kill bacteria of implant surface. The purpose of this study was to obtain clinical guide by application these laser to implant surface by means of Non-contact Surface profilometer and X-ray photoelectron spectroscopy(XPS) with respect to surface roughness and atomic composition. Experimental rough pure titanium cylinder models were fabricated. All of them was air-powder abraded for 1 minute and they were named control group. And then, the $CO_2$ laser treatment under dry, hydrogen peroxide and wet condition or the Soft Diode laser treatment under Toluidine blue O solution condition was performed on the each of the control models. The results were as follows: 1. Mean Surface roughness(Ra) of all experimental group was decreased than that of control group. But it wasn't statistically significant. 2. XPS analysis showed that in the all experimental group, titanium level were decreased, when compared with control group. 3. XPS analysis showed that the level of oxygen in the experimental group 1, 3($CO_2$ laser treatment under dry and wet condition) and 4(Soft Diode laser was used under toluidine blue O solution) were decreased, when compared with control group. 4. XPS analysis showed that the atomic composition of experimental group 2($CO_2$ laser treatment under hydrogen peroxide) was to be closest to that of control group than the other experimental group. From the result of this study, this may be concluded. Following air-powder abrasive treatment, the $CO_2$ laser in safe d-pulse mode and the Soft Diode laser used with photosensitizer would not change rough titanium surface roughness. Especially, $CO_2$ laser treatment under hydrogen peroxide gave the best results from elemental points of view, and can be used safely to treat peri-implantitis.

• 대한치과보철학회지
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• 제58권1호
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• pp.14-22
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• 2020

목적: 본 연구의 목적은 보철 재료 표면에서 MnO₂-diatom microbubbler (DM)의 세균막 제거 효과를 기존에 치과 임상에 구강세정제로 사용되고 있는 성분들과 비교하여 이 재료가 구강세정제로 사용될 수 있는 가능성을 평가하는 것이다. 재료 및 방법: 이산화망간 나노 시트가 도핑된 DM을 만들었고, 주사전자현미경(SEM)을 이용하여 형태에 대한 관찰 및 도핑된 MnO₂의 성분 분석을 시행하였다. 3% 과산화수소수에서 DM의 반응을 시간에 따라 관찰하기 위해 실체 현미경을 이용하였다. 보철 재료 표면의 세균막 제거 효과를 평가하기 위해 비귀금속 합금, 지르코니아, 레진 시편을 제작하였고 치아우식의 원인균이며 호기성 세균인 Streptococcus mutans와 치주질환의 원인균이며 혐기성 세균인 Porphyromonas gingivalis 세균막을 각각 형성하였다. 형성된 세균막에 3% 과산화수소수와 DM을 처리하였을 때 세균막 제거 효과를 클로르헥시딘 글루코네이트와 3% 과산화수소수의 경우와 crystal violet 염색 실험을 통해 비교 평가하였다. 결과: 속이 빈 원통 형태의 규조류에 이산화망간 성분이 발견되었고, 3% 과산화수소수에서 기체를 만들어내는 것을 확인할 수 있었다. 실험에 이용된 모든 재료에서 DM을 처리한 군이 클로르헥시딘 글루코네이트나 3% 과산화수소수 단독으로 사용한 군에 비해 통계적으로 유의하게 세균막을 효과적으로 제거하였다. 결론: MnO₂-diatom microbubbler는 보철 재료 표면의 세균막을 기존의 구강세정제 성분에 비해 더 효과적으로 제거할 수 있다.

• Journal of Periodontal and Implant Science
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• 제31권1호
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• pp.257-269
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• 2001

Removal of subgingival calculus is essential for the success in periodontal treatment. Subgingival instrumentation is used for the removal of all bacterial plaque and calculus. In this study, Gracey curet and Ultrasonic curet were used on single rooted teeth to conduct subgingval scaling and root planning. The remaining amount of calculus was evaluated according to type of instrument, depth of pocket, and tooth surface. 24 teeth were extracted from 14 patients being treated at department Periodontology Seoul Advantist dental hospital were used. Total 96 area(4 surface per teeth) were evaluated. 12 teeth treated with Gracey curet were used as the control group and the other 12 teeth treated with Ultrasonic curet were examined for experimental group. The 4 surface of the teeth(buccal, mesial, lingual or palatal, distal) were observed through the stereomicroscope and the images of the surface were captured and saved in CCD. The images were displayed on the monitor and the amount of calculus remained was evaluated by overlapping $10{\times}10$ grid pixel screen produced by Microsoft power point. The results evaluated were as follows 1. There was no statistically significant difference in residual calculus and tooth position following scaling and root planning of all group, but statistically significant correlation with residual calculus, probing depth, instruments and tooth surface. 2. There was statistically significant correlation between residual calculus and probing depth, but no statistically significant difference in residual calculus, tooth surface and tooth position on experimental(Ultrasonic curet) group. 3. There was no statistically significant difference in residual calculus according to the pre-treatment pocket depth and tooth position, but statistically significant correlation with tooth surface. The amount of residual calculus increase with mesial, distal, buccal and lingual(or palatal) surface on control(Gracey curet) group. 4. The Gracey showed better results than ultrasonic curet in mesial and distal surface, and there is significant difference. The results demonstrate that ultrasonic curet alone is inadequate for thorough subgingival debridement and suggest that Ultrasonic curet with Gracey curet should be more effective.

• 치위생과학회지
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• 제13권4호
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• pp.501-509
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• 2013

본 연구는 치아우식증 예방을 위한 모범 유치원 구강건강관리프로그램의 효과를 확인하고자 2012년 4월 구강보건 교육 전, 후 유아의 구강보건행태 변화에 대해 부모를 통한 설문을 진행하였으며, 유아를 대상으로는 치면세균막관리 능력을 평가하기 위해 교육 전, 교육 직후, 교육 3주 후에 PHP index를 측정하였다. 전체 156명의 유아 중 참여에 동의하지 않았거나, 해당일 결석으로 구강보건교육에 참여하지 못한 유아와 설문지 회수가 되지 않은 유아를 제외하고 총 130명을 대상으로 분석을 실시하였으며, 다음과 같은 결론을 얻었다. 1. 구강보건교육 시행 후 자녀의 시기별 칫솔질 실천율과 칫솔질 빈도, 소요시간, 칫솔질 행동에는 변화가 없었다(p>0.05). 치아건강교육에 대한 관심은 변화 없었으나(p>0.05), 칫솔질 방법 인지와 칫솔질 권유 시 반응, 치아의 중요성 인지는 긍정적으로 변화되었다(p<0.05). 2. 유아의 구강환경관리능력(PHP index)은 교육 전 3.87, 교육 직후 2.71, 교육 3주 경과 후 3.27로, 교육 전에 비해 유의하게 개선된 것을 확인할 수 있었다(p<0.001). 3. 보호자의 자일리톨 급식 인지율은 90.0%, 충치예방효과 인지율은 75.3%, 권유의사는 50.8%였으며, 추후 구강보건교육을 실시할 경우 보호자의 76.9%는 참여한다고 응답하였다. 부모의 관찰 결과 유아의 33.1%는 자일리톨 급식후, 60.7%는 구강보건교육 후 충치예방에 대한 관심이 생겼다고 하였다. 결과적으로 충치예방 모범 유치원 구강건강관리프로그램의 효과를 확인하였으므로 프로그램의 활성화를 위한 노력이 필요하며, 교사와 부모, 유아를 대상으로 계속구강건강관리프로그램을 운영함으로써 유아의 구강건강행동이 습관화되고 칫솔질 능력이 완성될 수 있도록 지속적인 관리와 재교육이 이루어져야 할 것이다.