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case_images: (a) Panoramic X-ray. (b-d) Intraoral photographs.
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case_images: Given the characteristics of the patient, the treatment planning consisted of the following: extraction of teeth 17 and 27, placement of immediate monomaxillary prostheses, and implant-supported mandibular prostheses with immediate loading (Figure 1(a)-(d)).
case_images: Vita MFT  teeth articulator.
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case_images: The articulation of three-layer acrylic artificial teeth (Vita MFT ) was carried out, with a short-arch occlusal scheme (Figure 2).
case_images: 4.3 mm x 13 mm Nobel Replace  implant planning.
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case_images: The placement of five interforaminal implants (Nobel Biocare ) of 4.3 mm in diameter by 13 mm in length was planned with the help of Mimic's software (Figure 3).
case_images: Dental extractions.
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case_images: The surgical guide was placed on the alveolar ridge, fixed with screws, and a Nobel Biocare drilling protocol   was performed (Figures 4 and 5).
case_images: Alveolar process regularization guide.
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case_images: The surgical guide was placed on the alveolar ridge, fixed with screws, and a Nobel Biocare drilling protocol   was performed (Figures 4 and 5).
case_images: Restrictive guide.
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case_images: A platform was made with the help of an acrylic regularization guide (Figure 6) and the implants were placed obtaining a primary stability of 45 N/cm2 in the implants in positions 33, 41, 42, and 43, only on 31 a primary stability of 20 N/cm2 was obtained (Figure 7).
case_images: Nobel replace implants placed.
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case_images: A platform was made with the help of an acrylic regularization guide (Figure 6) and the implants were placed obtaining a primary stability of 45 N/cm2 in the implants in positions 33, 41, 42, and 43, only on 31 a primary stability of 20 N/cm2 was obtained (Figure 7).
case_images: Splinting of prosthetic attachments with low shrinkage resin.
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case_images: Immediate loading was performed by trapping the 4.3 mm diameter titanium attachments on implants 31, 41, and 42 and the UCLA'S with customized distal extension on implants 33 and 43 with low shrinkage resin (Triad, Dentsply ) to achieve passivity and rigidity of the prostheses (Figure 8).
case_images: Conventional upper immediate prostheses antagonizing with implant-supported immediate fixed mandibular prostheses.
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case_images: During the first postoperative month, the case was followed up weekly for occlusal adjustment and evaluation of the healing, showing an adequate evolution (Figure 9).
case_images: Impression with polyvinylsiloxane.
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case_images: After splinting, the impression pins with low-shrinkage self-curing acrylic (Duralay ) (Figure 10).
case_images: Upper physiological impression and registration of craniomandibular relations.
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case_images: The upper denture was duplicated in clear acrylic for physiological impression taking with polyvinylsiloxane (Zhemarck), which was used to record the craniomandibular relationships and their transfer to the Hanau articulator (Figure 11).
case_images: Nickel-chromium alloy metal framework.
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case_images: From the articulation of the five-layer artificial teeth (Premier, Kulser ), the metallic structure of the implant-supported prostheses was made with nickel-chromium alloy (Remanium) (Figure 12).
case_images: (a and b) Finished prostheses.
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case_images: Finally, the final placement of the implant-supported fixed mandibular prostheses was performed with a torque of 35 N/cm2, rectifying simultaneous occlusal contacts and occlusal scheme of canine and anterior guides (Figure 13).