| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Tin AND/OR tin compound | Is a | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Iron compound | Is a | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Non-ferrous metal | Is a | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Nonmagnetic metal | Is a | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Magnetic metal | Is a | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Light metal | Is a | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Soft metal | Is a | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Thorium | Is a | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Nickel compound | Is a | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Cerium | Is a | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Ferrous metal | Is a | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Heavy metal | Is a | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Hard metal | Is a | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Antimony | Is a | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Contact metal agent | Is a | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metal element | Is a | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Pontic cast, noble metal | Direct substance | True | Metal | Inferred relationship | Existential restriction modifier | 1 | 
| [X]Toxic effect of other metals | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Accidental poisoning caused by beryllium and/or beryllium compound | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Pontic, porcelain fused to high noble metal | Direct substance | True | Metal | Inferred relationship | Existential restriction modifier | 3 | 
| Posteruptive tooth staining caused by metal | Causative agent | True | Metal | Inferred relationship | Existential restriction modifier | 3 | 
| Nonferrous ocular metallosis | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 3 | 
| Other metals causing toxic effect OS | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Other metals causing toxic effect NOS | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Other metals causing toxic effect | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of metal | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 1 | 
| Toxic effect of beryllium AND/OR its compounds | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metal pneumoconiosis | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Pontic, porcelain fused to noble metal | Direct substance | True | Metal | Inferred relationship | Existential restriction modifier | 3 | 
| Metallosis | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 2 | 
| Metals causing toxic effect NOS | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Pontic cast, predominantly base metal | Direct substance | True | Metal | Inferred relationship | Existential restriction modifier | 1 | 
| Pontic cast, high noble metal | Direct substance | True | Metal | Inferred relationship | Existential restriction modifier | 3 | 
| Accidental poisoning caused by metal | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 1 | 
| Lutetium | Is a | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Irritant contact dermatitis caused by metal | Causative agent | True | Metal | Inferred relationship | Existential restriction modifier | 1 | 
| Allergic contact dermatitis caused by metal | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Scandium | Is a | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Antimony pneumoconiosis | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Cobaltosis | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of nickel compound | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 2 | 
| Stannosis | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Toxic effect of iron compound | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 2 | 
| Toxic effect of tin and/or tin compound | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 2 | 
| Aluminosis of lung | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Allergy to metal | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 1 | 
| Cadmium pneumonitis | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier |  | 
| Aluminum bone disease | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 3 | 
| Aluminum-related osteomalacia | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 3 | 
| Aluminum-related fracturing osteodystrophy | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 3 | 
| Aluminum intoxication | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 2 | 
| Contact dermatitis caused by mercurial | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 1 | 
| Allergic contact dermatitis caused by metal | Causative agent | False | Metal | Inferred relationship | Existential restriction modifier | 1 | 
| Metallosis | Causative agent | True | Metal | Inferred relationship | Existential restriction modifier | 1 | 
| Nonferrous ocular metallosis | Causative agent | True | Metal | Inferred relationship | Existential restriction modifier | 1 | 
| Metallic spinal interbody fusion cage | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Resurfacing metallic femoral head prosthesis | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Resurfacing metallic acetabulum prosthesis | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal colonic stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal aortic stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal biliary stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal carotid artery stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Non-sterile bare metal esophageal stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal bronchial stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal coronary artery stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal esophageal stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Non-sterile bare metal tracheal and/or bronchial stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal ureteral stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal pancreatic stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Permanent bare metal urethral stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Short-term bare metal urethral stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal iliac artery stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metal stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal multiple peripheral artery stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metal stent-graft | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Sterile polymer coated metal esophageal stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Non-sterile polymer coated metal tracheal and/or bronchial stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Polymer coated metal colonic stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Polymer coated metal duodenal stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal intracranial vascular stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Bare metal renal artery stent | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Uncoated knee tibia prosthesis, metallic | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Orthodontic bracket, metal | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metallic reverse shoulder prosthesis cup | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metallic osteotomy fusion cage | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Multi-purpose surgical mesh, metallic | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metallic acetabulum prosthesis | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metallic osteotomy fusion cage, non-sterile | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metal medicine container | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metallic metatarsophalangeal joint prosthesis | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Fixative, metallic | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metal ear, nose and throat bur | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metal nail | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Non-neurovascular embolization plug, metallic | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metal device | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Uncoated unicondylar knee tibia prosthesis, metallic | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metal tube, device | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Teeth in wax and metal framework | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Metal-on-metal total hip prosthesis | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  | 
| Hemodynamic-modulation vessel repair implant, intracranial/carotid, polymer-metal | Has compositional material | True | Metal | Inferred relationship | Existential restriction modifier |  |