## Core Concept
The condition described suggests a case of **supernumerary tooth** or **odontome**, which is a type of extra tooth that can cause irritation, discomfort, or complications in the eruption of adjacent teeth. The presence of a white hard spicule embedded overlying the crest of the ridge further supports this diagnosis.

## Why the Correct Answer is Right
The management of a supernumerary tooth or odontome typically involves **surgical removal** to prevent potential complications such as delayed eruption of adjacent teeth, pain, infection, or cyst formation around the supernumerary tooth. The approach often depends on the location, size, and complexity of the supernumerary tooth. Given that the supernumerary tooth is causing irritation and is described as a white hard spicule, a straightforward **extraction or surgical removal** would be indicated.

## Why Each Wrong Option is Incorrect
- **Option A:** Without specifics on what this option entails, it's hard to directly refute, but generally, doing nothing (not intervening) would not be appropriate given the symptoms described.
- **Option B:** This could potentially involve procedures that are not directly related to the immediate management of a supernumerary tooth causing irritation, such as orthodontic movement or observation, which might not address the immediate need to alleviate symptoms.
- **Option C:** Similar to Option B, without specifics, any approach that does not directly address the removal of the causative agent (the supernumerary tooth) could be considered less optimal in this acute scenario.

## Clinical Pearl / High-Yield Fact
A key point to remember is that **supernumerary teeth** can be associated with various dental anomalies and syndromes. Their early identification and management can prevent complications such as malocclusion, delayed tooth eruption, and pathological changes like cyst formation.

## Correct Answer Line
**Correct Answer: D.**