**Core Concept**
Glass ionomer cement (GIC) is a type of dental restorative material that combines the properties of glass particles and an acidulated phosphate fluoride solution to form a durable and fluoride-releasing restorative material. It is widely used for non-load bearing restorations, such as Class III and Class V cavities.

**Why the Correct Answer is Right**
Glass ionomer cement releases fluoride ions, which help to prevent secondary caries and promote remineralization of tooth enamel. This property is unique to GIC and is a major advantage over other dental restorative materials. The fluoride release is due to the degradation of the polyalkenoic acid matrix, which occurs over time, releasing fluoride ions into the surrounding oral environment.

**Why Each Wrong Option is Incorrect**
**Option A:** Glass ionomer cement is a type of ceramic material, which is false. GIC is a type of resin-modified glass ionomer cement, which is a hybrid material that combines the properties of glass and resin.
**Option B:** Glass ionomer cement is not suitable for non-load bearing restorations, which is false. GIC is widely used for non-load bearing restorations, such as Class III and Class V cavities.
**Option C:** Glass ionomer cement does not release fluoride ions, which is false. GIC releases fluoride ions, which help to prevent secondary caries and promote remineralization of tooth enamel.
**Option D:** Glass ionomer cement is not a type of composite resin, which is true, but this option is not explicitly stated as false in the question.

**Clinical Pearl / High-Yield Fact**
Glass ionomer cement has a high fluoride release, which can be beneficial for preventing secondary caries. However, it also has a lower compressive strength compared to other dental restorative materials, making it less suitable for load-bearing restorations.

**Correct Answer: C. Glass ionomer cement does not release fluoride ions.**