• Journal of Periodontal and Implant Science
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• 제41권6호
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• pp.302-308
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• 2011

Purpose: The emergence profile concept of an implant restoration is one of the most important factors for the esthetics and health of peri-implant soft tissue. This paper reports on two cases of gingival recontouring by the fabrication of a provisional implant restoration to produce an optimal emergence profile of a definitive implant restoration. Methods: After the second surgery, a preliminary impression was taken to make a soft tissue working cast. A provisional crown was fabricated on the model. The soft tissue around the implant fixture on the model was trimmed with a laboratory scalpel to produce the scalloped gingival form. Light curing composite resin was added to fill the space between the provisional crown base and trimmed gingiva. After 4 to 6 weeks, the final impression was taken to make a definitive implant restoration, where the soft tissue and tooth form were in harmony with the adjacent tooth. Results: At the first insertion of the provisional restoration, gum bleaching revealed gingival pressure. Four to six weeks after placing the provisional restoration, the gum reformed with harmony between the peri-implant gingiva and adjacent dentition. Conclusions: Gingival recontouring with a provisional implant restoration is a non-surgical and non-procedure-sensitive method. The implant restoration with the optimal emergence profile is expected to provide superior esthetic and functional results.

• 대한심미치과학회지
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• 제30권2호
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• pp.44-52
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• 2021

본 기고를 통해, provisional restoration 의 정보를 final restoration 에 정확하게 전달하기 위한 방법중의 하나인 Cross mounting 의 개념과 자세한 방법, 그리고 임상 팁에 대해서 소개하고자 한다.

• 대한치과보철학회지
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• 제55권1호
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• pp.46-52
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• 2017

임시보철물은 고정성 보철물로의 수복 과정에서 지대치 보호 및 기능과 심미성 회복의 측면에서 중요한 역할을 수행한다. 특히 이를 장착한 상태로 최종 수복 전에 장기간의 관찰이 필요한 환자에서 그 중요성이 더욱 강조되나, 상대적으로 낮은 강도로 인하여 잦은 파절이 발생할 수 있으며 이를 방지하기 위해 강화된 임시보철물의 제작을 고려할 수 있다. 이 문헌에서는 교합 수직 고경의 증가를 필요로 하는 환자의 증례를 소개하고자 하였으며, 수직 고경 증가의 영향으로 임시보철물 사용 시 더 큰 부하의 작용 및 장기간의 사용이 예상되었다. 이에 주조 금속 하부구조물을 첨가하여 bis-acryl 레진으로 강화된 임시보철물을 제작하였으며, 약 4개월의 관찰 기간 동안 만족스러운 결과를 보였다.

• 대한치과기공학회지
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• 제32권1호
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• pp.65-78
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• 2010

• 대한치과보철학회지
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• 제51권3호
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• pp.221-225
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• 2013

임시 보철물의 적절한 관리는 보철의 성공에 있어서 중요한 요소이다. 상악 전치 결손부 임시 보철물은 장경간의 결손부가 존재하거나, 타원형의 악궁을 가진 환자에서 자주 탈락하게 된다. 이는 상악 전치부가 구치부에 비해서 수평적인 힘에 더 많이 노출되며, 부가적으로 전방 캔틸레버 효과가 임시 보철물의 유지를 저해하고, 상악 전치부 임시 보철물은 하악의 기능 운동시 적절한 전방 유도를 제공하여야 하기 때문이다. 또한 임시 보철물의 최대 감합위에서 교합접촉은 지점선의 반대편에 위치하게 되어 그 자체로 임시 보철물의 탈락을 야기한다. 본 증례에서는 임시 임플란트를 이용하여 상악 전치부 보철물에 대한 전술한 유해 작용을 피할 수 있었고, 발치 후 치유기간 동안 환자에게 편안함과 만족감을 부여하였으므로 이를 보고하는 바이다.

• 대한치과의사협회지
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• 제54권1호
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• pp.21-26
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• 2016

The requirements for the successful treatment of all-ceramic restorations are not so different from the ones of conventional restorations. "The provisional restoration followed by an adequate tooth reduction" and "the accurately fitting prostheses with corresponding to final impression" can be the examples of them. Nevertheless, the one which all-ceramic restorations are distinguished from conventional restorations is the additional procedure of so called "bonding". In addition to the application of resin cement between "inner surface of restoration and outer surface of abutment", bonding technology can be also applied to the treatment process of "Post and Core" in particular if the abutments are non-vital teeth. Core build-up for all-ceramic crown is conducted with fiber post and tooth colored composite by considering the properties of the restorations transmitting light. I would like to share my clinical experience about "silica based ceramic and non silica based ceramic restoration.

• 구강생물연구
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• 제42권4호
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• pp.262-268
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• 2018

In a situation where a vertical dimension has to be increased, the normal occlusion, function and aesthetics should be restored after taking into consideration the neuromuscular system and temporomandibular join. In order to do this, the provisional prosthesis should be made according to the patient's information. Moreover, the period of adjustment should be made through the provisional prosthesis modification, if necessary. The patient is then transferred to the final prosthesis to obtain results that are satisfactory. In the modern-day world, provisional prosthesis are replicated using three dimensional scanning and computer aided design/computer aided manufacturing (CAD/CAM) then made into final prosthesis. The adaptability of stomatognathic system can be judged by the PMMA provisional restoration. Functional and aesthetical aspect can be obtained. The adjustment period can be shortened by an intraoral correction and proper wear between provisional restorations. By using the CAD/CAM technology that transfers the information right into the final prosthesis.

• The Journal of Advanced Prosthodontics
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• 제11권2호
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• pp.95-104
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• 2019

PURPOSE. To evaluate the effect of surface treatments and repair materials on the shear bond strength and to measure the fracture toughness of CAD/CAM provisional restoration materials. MATERIALS AND METHODS. Four CAD/CAM (3D printing: Nextdent C&B and ZMD-1000B Temporary, CAD/CAM resin block: Yamahachi PMMA disk and Huge PMMA block) and four conventional (monometacrylate: Jet and Alike, dimetacrylate: Luxatemp and Protemp 4) materials were selected to fabricate disk-shaped specimens and divided into six groups according to surface treatment (n=10). CAD/CAM materials were repaired with Jet or Luxatemp, while conventional materials were repaired with their own materials. The shear bond strength was measured by using universal testing machine. Ten rectangular column-shaped specimens for each material were fabricated to measure the fracture toughness by single edge v notched beam technique. Statistical analysis was performed by one-way ANOVA. RESULTS. The highest shear bond strength of CAD/CAM materials was achieved by SiC paper + sandblasting. It was also accomplished when repairing 3D printing materials with Luxatemp, and repairing CAD/CAM resin blocks with Jet. Yamahachi PMMA disk showed the highest fracture toughness. Nextdent C&B showed the lowest fracture toughness value but no statistically significant difference from Alike and Luxatemp (P>.05). CONCLUSION. In order to successfully repair the CAD/CAM provisional restoration, mechanical surface treatment and appropriate repair material according to the CAD/CAM material type should be selected. The CAD/CAM provisional materials have proper mechanical properties for clinical use as compared to conventional materials.

• The Journal of Advanced Prosthodontics
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• 제12권5호
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• pp.322-328
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• 2020

PURPOSE. This study evaluated the shear bond strength between 3D printed provisional resin and conventional provisional resin depending on type of conventional provisional resin and different surface treatments of 3D printed resin. MATERIALS AND METHODS. Ninety-six disc-shaped specimens (Ø14 mm × 20 mm thickness) were printed with resin for 3D printing (Nextdent C&B, Vertex-Dental B. V., Soesterberg, Netherlands). After post-processing, the specimens were randomly divided into 8 groups (n=12) according to two types of conventional repair resin (methylmethacrylate and bis-acryl composite) and four different surface treatments: no additional treatment, air abrasion, soaking in methylmethacrylate (MMA) monomer, and soaking in MMA monomer after air abrasion. After surface treatment, each repair resin was bonded in cylindrical shape using a silicone mold. Specimens were stored in 37℃ distilled water for 24 hours. The shear bond strength was measured using a universal testing machine at a crosshead speed of 0.5 mm/min. Failure modes were analyzed by scanning electron microscope. Statistical analysis was done using one-way ANOVA test and Kruskal-Wallis test (α=.05). RESULTS. The group repaired with bis-acryl composite without additional surface treatment showed the highest mean shear bond strength. It was significantly higher than all four groups repaired with methylmethacrylate (P<.05). Additional surface treatments, neither mechanical nor chemical, increased the shear bond strength within methylmethacrylate groups and bis-acryl composite groups (P>.05). Failure mode analysis showed that cohesive failure was most frequent in both methylmethacrylate and bis-acryl composite groups. CONCLUSION. Our results suggest that when repairing 3D printed provisional restoration with conventional provisional resin, repair with bis-acryl composite without additional surface treatment is recommended.

• The Journal of Advanced Prosthodontics
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• 제11권4호
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• pp.232-238
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• 2019

PURPOSE. The aim of this study was to investigate simulated localized and generalized wear of indirect composite resins used for implant supported provisional restorations. MATERIALS AND METHODS. The study investigated ten indirect composite resins. Two kinds of wear were simulated by 400,000 cycles in a Leinfelder-Suzuki (Alabama) machine. Localized wear was simulated with a stainless-steel ball bearing antagonist and generalized with a flat-ended stainless-steel cylinder antagonist. The tests were carried out in water slurry of polymethyl methacrylate beads. Wear was measured using a Proscan 2100 noncontact profilometer in conjunction with Proscan and AnSur 3D software. RESULTS. Both localized and generalized wear were significantly different (P<.05) among the indirect composite resins. SR Nexco and Gradia Plus showed significantly less wear than the other indirect composite resins. The rank order of wear was same in both types of wear simulation. CONCLUSION. Indirect composite resins are recommended when a provisional implant-supported restoration is required to function in place over a long period. Although only some indirect composite resins showed similar wear resistance to CAD/CAM composite resins, the wear resistance of all the indirect composite resins was higher than that of bis-acryl base provisional and polymethyl methacrylate resins.