| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Surgical face mask, reusable | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Surgical face mask, single-use | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Surgical helmet | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Dental occlusal splint, custom-made | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Dental occlusal splint, over-the-counter | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Dental occlusal splint, preformed | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Face shield | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Eye shield/protector | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Smoking apron | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Acoustic earmuffs | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Earplugs, reusable | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Earplugs, single-use | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Eye pad | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Wheelchair glove | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Orthotic helmet | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Stump sock | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Moisture chamber spectacles | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Semi-insert earplugs | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Airway protection face mask | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Moisture chamber goggles | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Moisture chamber face mask | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Thermal earmuffs | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Dental abrasive disk guard | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Instrument guard, reusable | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Mouthguard, custom-made | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Mouthguard, preformed | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Bunion shield | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Eye mask | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Infant heat shield | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Nipple shield, reusable | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Nipple shield, single-use | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Wound shield | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Surgical wound protection ring | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Arm/elbow protector | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Knee protector | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Hip protection trousers | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Elbow protector | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Heel protector | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Chest protector | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Foot protector | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Intubation teeth protector | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Dental teeth protector | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Instrument guard, single-use | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Point-of-care blood glucose continuous monitoring system connector cap | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Public respirator | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Breast/nipple pad, hydrogel, reusable | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Antimicrobial surgical respirator | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Surgical respirator | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Breast/nipple pad, hydrogel, single-use | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Nasal air filter, fabric | Is a | False | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Hearing aid wax guard | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Surgical finger guard | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Laser beam-blocking barrier | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Respiratory thermal shield | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Tracheostoma shower shield | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Surgical stapler handpiece housing | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Flexible laparoscope protective guide | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Shin guard | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Dental throat shield | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  | 
| Perineo-gynecological wound protector | Is a | True | Shield, device | Inferred relationship | Existential restriction modifier |  |