Quantitative Evaluation of Tissue Surface Adaption of CAD-Designed and 3D Printed Wax Pattern of Maxillary Complete Denture

Chen, Hu; Wang, Han; Lv, Peijun; Wang, Yong; Sun, Yuchun

doi:10.1155/2015/453968

Cited by 44 publications

(32 citation statements)

References 7 publications

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“…Although CAD/CAM obturators showed lower misfit values (0.28 ± 0.18) when compared to Heat-cured ones (0.45 ± 0.21), there were no statistical significant differences between both obturator groups at any measured surface. These findings are in line with those of Chen et al (20) who found higher adaption values for CAD/CAM bases.…”

Section: Analysis Of Resulting Miss Fit Of the Two Groupssupporting

confidence: 93%

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Digital Evaluation of Dimensional Accuracy and Intimacy of Fit of Single-Piece Closed Hollow Bulb Obturators Fabricated by Cad/Cam Additive Manufacturing

Neena

Alshimy

Khamis

et al. 2020

Alexandria Dental Journal

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INTRODUCTION: Conventional techniques for closed hollow bulb obturators construction are technique sensitive, consume considerable amount of materials, and lack adequate control of the walls thickness of the bulb. Additionally, created sealing area is a potential site of leakage and discoloration. Digital technologies offer promising solutions to these drawbacks. Subtractive manufacturing systems are unable to produce hollow objects as one piece. In contrast, additive manufacturing systems can produce a hollow object in one piece. OBJECTIVES: The aim of the present study was to evaluate one-piece closed hollow bulb obturators fabricated using CAD/CAM additive manufacturing and compare them to those constructed from heat cured resin. MATERIALS AND METHODS: Six partially dentate patients with healed unilateral maxillary defects (Aramany's classes I or II) received two closed hollow bulb obturators. One constructed using CAD/CAM additive manufacturing, and another constructed from conventional acrylic resin. All patients' prostheses were evaluated for dimensional accuracy and intimacy of fit using digital measuring software package. RESULTS: CAD/CAM obturators showed negative dimensional change values when compared to the original design, while Heat-cured obturators showed positive ones. Generally, the highest values of deviations were recorded at occlusal units for CAD/CAM obturators (-0.34 ± 0.10) and Heat-cured obturators (0.21 ± 0.12) when fitting surface was used as reference. There were statistical significant differences in dimensional deviation between both obturator groups using two registration references. CAD/CAM obturators showed lower misfit values when compared to Heat-cured ones. The highest values of misfit were recorded at the oral extensions of the CAD/CAM (0.44 ± 0.27) and Heat-cured obturators (0.47 ± 0.32). However, there were no statistical significant differences between both obturator groups at any measured surface. CONCLUSIONS: Additive manufacturing of obturators could be an alternative to conventional techniques for direct construction of onepiece closed hollow bulb obturators.

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Section: Analysis Of Resulting Miss Fit Of the Two Groupssupporting

confidence: 93%

“…Chen et al (20) suggested a digital technique to quantitatively evaluate the tissue surface adaption of a maxillary complete denture wax pattern produced by CAD/CAM. The cast model and the two wax patterns to be evaluated for tissue adaption were separately scanned.…”

Section: Introductionmentioning

confidence: 99%

Digital Evaluation of Dimensional Accuracy and Intimacy of Fit of Single-Piece Closed Hollow Bulb Obturators Fabricated by Cad/Cam Additive Manufacturing

Neena

Alshimy

Khamis

et al. 2020

Alexandria Dental Journal

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show abstract

“…Clinical success, in terms of patient satisfaction and patient preference for the CAD/CAM manufactured CRDPs, has been reported in literature [4][5][6] . In terms of the trueness of the CAD/CAM fabricated CRDPs, when compared to conventional CRDPs, was found to be non-inferior to a conventional PMMA and within the clinically acceptable range [7][8][9][10] . The conventional 'flask-pack-press' technique for the fabrication of CRDPs has been employed for more than half-a-century and can be considered as a time-tested "gold standard" procedure.…”

Section: Introductionmentioning

confidence: 90%

CAD/CAM milled complete removable dental prostheses: An <i>in vitro</i> evaluation of biocompatibility, mechanical properties, and surface roughness

Srinivasan

Gjengedal

Cattani-Lorente

et al. 2018

Dental Materials Journal

109

124

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This study compared the biocompatibility, mechanical properties, and surface roughness of a pre-polymerized polymethyl methacrylate (PMMA) resin for CAD/CAM complete removable dental prostheses (CRDPs) and a traditional heat-polymerized PMMA resin. Two groups of resin substrates [Control (RC): conventional PMMA; Test (RA): CAD/CAM PMMA] were fabricated. Human primary osteoblasts and mouse embryonic-fibroblasts were cultured for biocompatibility assays. Mechanical properties and surface roughness were compared. ANOVA revealed no difference between the resin groups in the biocompatibility assays. RA demonstrated a higher elastic modulus (p=0.002), young's modulus (p=0.002), plastic energy (p=0.002), ultimate strength (p=0.0004), yield point (p=0.016), strain at yield point (p=0.037), and toughness (p<0.0001); while RC displayed a higher elastic energy (p<0.0001). Laser profilometry concluded a rougher surface profile (p<0.0001) for RA. This study concluded that the tested CAD/CAM resin was equally biocompatible and presented with improved mechanical properties than the traditional heat-polymerized PMMA resin used in the fabrication of CRDPs.

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“…A steady evolution and improvement of the technologies, has led to an exponential increase in the number of providers and systems available in the market today [4]. Evidence suggests that CRDPs manufactured by CAD/CAM methods are equivalent or superior to conventionally manufactured CRDPs in terms of accuracy [5][6][7][8][9] and have improved material properties [10,11]. A number of studies have demonstrated very high levels of patient satisfaction with CRDPs constructed with CAD/CAM methods [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

CAD/CAM milled removable complete dentures: time and cost estimation study

Srinivasan

Schimmel

Naharro

et al. 2019

Journal of Dentistry

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ObjectiveThis study compared the clinical time spent and the costs incurred whilstconstructing complete dentures (CDs) using a two-visit digital-denture protocol (DDP) with the conventional complete denture protocol (CCDP), in a university setting.Methods Twelve undergraduate final-year dental students utilized both the DDP and the CCDP to construct two sets of CDs for patients requiring either an upper CD opposing a partial natural dentition restored using a partial removable prosthesis [Group#1: students: n = 6, upper CD: n = 12 (6-DDP +6-CCDP)] or both upper and lower CDs [Group#2: students: n = 6, upper and lower CDs: n = 24 (12-DDP + 12-CCDP)]. Overall time spent and costs (clinical, materials, and laboratory) were calculated. Cost minimization analyses was performed to compare the economic costs of the two protocols. Paired t-tests were applied for the statistical analyses (p < 0.05). Results CCDP required longer clinical time than DDP for both Group#1 (p = 0.0206) and Group#2 (p = 0.0020). The materials costs were higher for the DDP in both groups (Group#1 p < 0.0001; Group#2: p = 0.0002). The overall costs, were significantly higher for the CCDP than the DDP (Group#1: p = 0.0032;Group 2: p = 0.0080).ConclusionsIn a university setting student clinic in Geneva, Switzerland,construction of CDs utilizing a DDP is significantly less costly in terms of the chairside time and overall costs incurred when compared with the CCDP.

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Quantitative Evaluation of Tissue Surface Adaption of CAD-Designed and 3D Printed Wax Pattern of Maxillary Complete Denture

Cited by 44 publications

References 7 publications

Digital Evaluation of Dimensional Accuracy and Intimacy of Fit of Single-Piece Closed Hollow Bulb Obturators Fabricated by Cad/Cam Additive Manufacturing

Digital Evaluation of Dimensional Accuracy and Intimacy of Fit of Single-Piece Closed Hollow Bulb Obturators Fabricated by Cad/Cam Additive Manufacturing

CAD/CAM milled complete removable dental prostheses: An <i>in vitro</i> evaluation of biocompatibility, mechanical properties, and surface roughness

CAD/CAM milled removable complete dentures: time and cost estimation study

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