2.Application of digital technique in shaping of emergence profile for prostheses supported by dental implant.
Chinese Journal of Stomatology 2022;57(4):334-339
In the field of dental implantology, the design of interface esthetics not only affects the esthetic coutcome, but also affects the health and long-term stability of the tissue around dental implant. Dental implant, bone tissue, soft tissue, and prostheses' morphology are the four critical elements of interface esthetics. The emergence profile located at the junction of these four components is an important form of oral esthetics. With the wide application of digital technique in the field of dentistry, the shaping of emergence profile also involves the application of many kinds of digital approaches. This article intends to make a review of the application of digital technique in rehabilitation of interface esthetics to provide a reference for clinical practic.
Dental Implants
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Dental Prosthesis, Implant-Supported
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Esthetics, Dental
3.Effect of cement washout on loosening of abutment screws and vice versa in screw- and cement- retained implant-supported dental prosthesis.
Seok Gyu KIM ; Chae Heon CHUNG ; Mee Kyoung SON
The Journal of Advanced Prosthodontics 2015;7(3):207-213
PURPOSE: The purpose of this study was to examine the abutment screw stability of screw- and cement-retained implant-supported dental prosthesis (SCP) after simulated cement washout as well as the stability of SCP cements after complete loosening of abutment screws. MATERIALS AND METHODS: Thirty-six titanium CAD/CAM-made implant prostheses were fabricated on two implants placed in the resin models. Each prosthesis is a two-unit SCP: one screw-retained and the other cemented. After evaluating the passive fit of each prosthesis, all implant prostheses were randomly divided into 3 groups: screwed and cemented SCP (Control), screwed and noncemented SCP (Group 1), unscrewed and cemented SCP (Group 2). Each prosthesis in Control and Group 1 was screwed and/or cemented, and the preloading reverse torque value (RTV) was evaluated. SCP in Group 2 was screwed and cemented, and then unscrewed (RTV=0) after the cement was set. After cyclic loading was applied, the postloading RTV was measured. RTV loss and decementation ratios were calculated for statistical analysis. RESULTS: There was no significant difference in RTV loss ratio between Control and Group 1 (P=.16). No decemented prosthesis was found among Control and Group 2. CONCLUSION: Within the limits of this in vitro study, the stabilities of SCP abutment screws and cement were not significantly changed after simulated cement washout or screw loosening.
Dental Cements
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Dental Prosthesis, Implant-Supported*
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Prostheses and Implants
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Titanium
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Torque
5.Criteria for success in dental implants.
Yi MAN ; Hai-Yang YU ; Zuo-Lin WANG ; Yao WU ; Bang-Cheng YANG ; Lei CHENG ; Xue-Dong ZHOU ; Yao SUN
West China Journal of Stomatology 2019;37(1):1-6
With the comprehensive application and development of implant dentistry in recent years, multi-institutional data have supported a large number of clinical research findings. A consensus was gradually reached on the evaluation of the state and effect of implants and types of indicators that were selected after restoration. This study aims to examine the frequently used criteria to define treatment success in implant dentistry.
Dental Implants
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Dental Prosthesis Design
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Dental Prosthesis, Implant-Supported
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Dental Restoration Failure
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Treatment Outcome
6.Clinical application of integrated angulated screw channel abutment crown in implant-supported rehabilitation of aesthetic area.
Yan Mei WANG ; Xin LIU ; Jia Cai HE
West China Journal of Stomatology 2021;39(6):712-717
OBJECTIVES:
To evaluate the clinical effect of integrated angulated screw channel (ASC) abutment crown in implant-supported rehabilitation of the aesthetic area.
METHODS:
Sixteen patients who received single implant-supported rehabilitation using integrated ASC abutment crown in the aesthetic area were included in the study. After one-year follow-up, the cumulative survival rate, aesthetic effectiveness, bone resorption around implants, and patient satisfaction were analyzed through periapical film, clinical examination, and the visual analog scale (VAS).
RESULTS:
The implant cumulative survival rate of the integrated ASC abutment crown in the implant-supported rehabilitation of the aesthetic area was 100%. The average pink esthetic index scores reached 9.5, and the white esthetic index scores reached 9.4. The mean marginal bone loss of implants was (0.439±0.123) mm at the mesial side and (0.341±0.118) mm at the distal side. The average VAS satisfaction score was 8.9, which showed that all patients were satisfied with the final restorative effect.
CONCLUSIONS
Using integrated ASC abutment crown for implant restoration is an ideal implant restoration design in the aesthetic zone and can be applied clinically.
Bone Screws
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Crowns
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Dental Implants
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Dental Implants, Single-Tooth
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Dental Prosthesis, Implant-Supported
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Esthetics, Dental
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Humans
7.Effect of the number and inclination of implant on stress distribution for mandibular full-arch fixed prosthesis.
Xiaoying ZHENG ; Xiaomei LI ; Zhen TANG ; Lulu GONG ; Dalin WANG
Chinese Journal of Stomatology 2014;49(6):339-342
OBJECTIVETo study the effect of implant number and inclination on stress distribution in implant and its surrounding bone with three-dimensional finite element analysis.
METHODSA special denture was made for an edentulous mandible cast to collect three-dimensional finite element data. Three three-dimensional finite element models were established as follows. Model 1: 6 paralleled implants; model 2: 4 paralleled implants; model 3: 4 implants, the two anterior implants were parallel, the two distal implants were tilted 30° distally.
RESULTSAmong the three models, the maximum stress values found in anterior implants, posterior implants, and peri-implant bone were modle 3
CONCLUSIONSWithin the limitation of this study, when implants are placed parallel, the maximum stress of the distal implant can be reduced by increasing the number of implant.When the number of implant was decreased from six to four, the maximum stress around the implant can be reduced by tilting the distal implant. This design will provide a better prostheses effect than the design with six implants does.
Dental Implants ; Dental Prosthesis Design ; Dental Prosthesis, Implant-Supported ; Dental Stress Analysis ; Finite Element Analysis ; Mandible ; Prostheses and Implants ; Prosthesis Implantation
9.Clinical research of immediate restoration implant with mini-implants in edentulous space.
Jian-sheng HUANG ; Jian-jiang ZHAO ; Qiong LIU ; Tian-tao LIU
West China Journal of Stomatology 2010;28(4):412-416
OBJECTIVEThe purpose of this study was to investigate the clinical effective of immediate restoration with Osstem MS mini-implant in the edentulous space of 5-6 mm.
METHODSThe sample consisted of 36 consecutively treated partially edentulous patients who had a total of 36 Osstem MS mini-implants, which were 2.5 mm or 3.0 mm in diameter and placed in 5-6 mm gap. The chair-side-made or laboratory-made provisional crowns for implants were fabricated at the time of fixtures placed. The final restorations were fabricated with gold alloy-fused-porcelain crown 3 to 5 months later. During the mean 21.3 months (12-37 months) follow-up time since fixtures placement, all implants were examined clinically and radiologically.
RESULTSNo implant failed before restoration. One implant led an adjacent tooth pulp necrosis after the implantation, but the natural tooth and implant were successfully retained by root canal therapy. 36 implants in 36 patients who were followed-up were successful and their aesthetic results were satisfactory.
CONCLUSIONImmediate loaded implant with Osstem MS mini-implant has good clinical prosthetic effects in the edentulous space of 5-6 mm.
Dental Abutments ; Dental Implantation, Endosseous ; Dental Prosthesis, Implant-Supported ; Humans ; Jaw, Edentulous
10.Immediate loading of implants in fully edentulous jaws: two cases report.
Jian-sheng HUANG ; Xiao-bin ZHU
West China Journal of Stomatology 2009;27(2):227-231
Thirty-six implants were placed into 2 patients with fully edentulous jaws. Provisional prosthesis were placed into 34 of 36 implants which implant stability quotient (ISQ) was larger than 60 at the time of fixture placement. After 3 months, osseointegration of implants completed and permanence reparations were made. None implant lost among 18 months to 26 months since the immediate restoration was loaded. The average accumulate bone loss was 0.41 mm.
Dental Implantation, Endosseous
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Dental Implants
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Dental Prosthesis, Implant-Supported
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Humans
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Jaw, Edentulous
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Male
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Osseointegration