A novel conversion method for radiographic guide into surgical guide

Peng, Yao; Tseng, Chung‐Chih; Du, Yi; Chen, Yen-Nien; Chang, Chih Han

doi:10.1111/cid.12469

Cited by 9 publications

(6 citation statements)

References 28 publications

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“…3). To calculate the marginal gaps, the original standard and silicone-coated models were digitally mapped by accuracy analysis module of MIRDC Dental software (Metal Industry Research Development Centre, Kaohsiung, Taiwan) 3 . The superimposition of these two models was performed by aligning the corresponding matrix based on a number of planes (mesial, distal, buccal, and lingual) and mapped points.…”

Section: Methodsmentioning

confidence: 99%

“…High-quality restorations can be achieved by experienced dental technicians in a series of precision conventional lost wax and casting manufacturing processes. Recently, more and more digital technologies, such as the dental computer-aided design and computer-aided manufacturing (CAD/CAM) system (subtractive manufacturing) 1 , 2 or the surgical planning system, 3 , 4 have been developed to assist clinicians to complete treatments effectively. In these digital systems, the dental CAD/CAM systems are generally used to improve the effectiveness of prosthesis fabrications.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of marginal adaptation of Co Cr Mo metal crowns fabricated by traditional method and computer-aided technologies

Chang

Peng

Hung³

et al. 2019

Journal of Dental Sciences

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Background/purposeThe purpose of this study was to evaluate the marginal gaps of dental restorations manufactured using conventional loss wax and casting, computer-aided design/computer-aided manufacturing (CAD/CAM), and 3D printing methods.Materials and methodsA zirconia master die model with an upper right first molar resin crown was prepared as a standardized model. A total of 30 resin master die models were duplicated from this standard model. Simultaneously, 10 Co—Cr—Mo metal crowns were individually obtained using the conventional loss wax and casting method (Group A), selective laser sintering (Group B), and CAD/CAM (Group C), respectively. The marginal gaps between the crowns fabricated conventional and digital methods with master die models were calculated using a 3D replica and mapping technique.ResultsStatistical analyses revealed there were significant differences in the marginal gaps in the group A with group B and C (p < 0.05). The mean marginal gaps between dental crowns with die models were 76 ± 61 μm, 116 ± 92 μm, and 121 ± 98 μm for groups A, B, and C, respectively.ConclusionWithin the limitations of this study, the marginal gaps were clinical acceptable in conventional and digital techniques.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of marginal adaptation of Co Cr Mo metal crowns fabricated by traditional method and computer-aided technologies

Chang

Peng

Hung³

et al. 2019

Journal of Dental Sciences

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“…The lack of stability is a danger, since it can determine spatial deviations in the insertion of the implants, compared to the original planning [2, 3, 6, 18, 21, 22]. Such deviations do not necessarily lead to invasion of dangerous anatomical structures, but may result in an implant placement that is too buccal, which may lead to complications and aesthetic sequelae [3, 6, 18, 21, 22, 26], or insertion too close to other teeth or implants. All these situations can complicate the prosthetic rehabilitation, forcing the dental technician to adopt compromise solutions.…”

Section: Introductionmentioning

confidence: 99%

A novel guided surgery system with a sleeveless open frame structure: a retrospective clinical study on 38 partially edentulous patients with 1 year of follow-up

et al. 2019

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BackgroundThis retrospective clinical study aims to present results of experience with a novel guided surgery system with a sleeveless, open-frame structure, in which the surgical handpiece (not the drills used for preparation) is guided.MethodsThis study was based on an evaluation of the records of partially edentulous patients who had been treated with a sleeveless open-frame guided surgery system (TWIN-Guide®, 2Ingis, Brussels, Belgium), between January 2015 and December 2017. Inclusion criteria were patients with good systemic/oral health and a minimum follow-up of 1 year. Exclusion criteria were patients who had been treated without a guide, or with a guide with sleeves, patients with systemic/oral diseases and who did not have a follow-up of 1 year. The main outcomes were surgical (fit and stability of the surgical guide, duration of the intervention, implant stability, and any intra-operative or immediate post-operative complication), biologic, and prosthetic.ResultsThirty-eight patients (24 males, 14 females; mean age 56.5 ± 14.0 years) were included in the study. These patients had been treated with 110 implants inserted by means of 40 sleeveless, open-frame guides. With regard to fit and stability, 34 guides were excellent, 4 acceptable, and 2 inadequate for use. The mean duration of the intervention was 23.7 (± 6.7) minutes. Immediately after placement, 2 fixtures were not stable and had to be removed. Two patients experienced pain/swelling after surgery. The 108 surviving implants were restored with 36 single crowns and 32 fixed partial prostheses (24 two-unit and 8 three-unit bridges); these restorations survived until the 1-year follow-up, with a low incidence of biologic and prosthetic complications.ConclusionsWithin the limits of this study, this novel guided surgery system with sleeveless, open frame–structure guides seems to be clinically reliable; further studies on a larger sample of patients are needed to confirm these outcomes.

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“…For laboratory milled surgical guide, the most critical step is to transfer the virtual implant position into the coordinates of the milling machine. Previous studies have reported several transfer methods, such as the "X-cube", orthogonally designed acrylic rods or a standard template [9,10]. In 2018, a kind of implant surgical guide fabricated using 5-axis Computer Numerical Control (CNC) milling machine for guided implant placement in the edentulous jaw was introduced [11].…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Implant Surgical Guides Fabricated Using Computer Numerical Control Milling for Edentulous Jaws: A Pilot Clinical Trial

Chai

Liu

Schweyen

et al. 2020

Preprint

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Background: To evaluate the accuracy of a computer numerical control (CNC) milled surgical guide for implant placement in edentulous jaws.Methods: Edentulous patients seeking implants treatment were recruited in this prospective cohort study. Radiographic guides with diagnostic templates were fabricated from wax-up dentures. Patients took cone-beam computed tomography (CBCT) wearing the radiopaque radiographic guides. Implant positions were virtually designed in the planning software based on the CBCT data, and the radiographic templates were converted into surgical guides using CNC milling technique. Forty-four implants were placed into 12 edentulous jaws following guided implant surgery protocol. Post-surgery CBCT scans were made for each jaw, and the deviations between the planned and actual implant positions were measured. Deviation of implant position was compared between maxilla and mandible, and between cases with and without anchor pins using independent t-test.Results: Nine patients (3 males and 6 females) with 12 edentulous jaws were recruited. The mean age of patients was 59.2±13.9 years old. All 44 implants was placed without complication and survived, The mean three dimensional linear deviation of implant position between virtual planning and actual placement was 1.53 ±0.48mm at the implant neck and 1.58 ±0.49 mm at the apex. The angular deviation was 3.96 ±3.05 degrees. No significant difference was found in the deviation of implant position between maxilla and mandible (P=0.28 at neck, 0.08 at apex), nor between cases with and without anchor pins (P=0.87 at neck, 0.06 at apex). Conclusions: The guides fabricated using the CNC milling technique provided comparable accuracy as those fabricated by Stereolithography. The displacement of the guides on edentulous arch might be the main contributing factor of deviation.Trial registration: Chinese Clinical Trial Registry, ChiCTR-ONC-17014159 (July 26, 2017)

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A novel conversion method for radiographic guide into surgical guide

Abstract: The novel method for converting a radiographic guide into a surgical guide appears accurate and stable compared with SLA.

Cited by 9 publications

References 28 publications

Evaluation of marginal adaptation of Co Cr Mo metal crowns fabricated by traditional method and computer-aided technologies

Evaluation of marginal adaptation of Co Cr Mo metal crowns fabricated by traditional method and computer-aided technologies

A novel guided surgery system with a sleeveless open frame structure: a retrospective clinical study on 38 partially edentulous patients with 1 year of follow-up

Accuracy of Implant Surgical Guides Fabricated Using Computer Numerical Control Milling for Edentulous Jaws: A Pilot Clinical Trial

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