**Core Concept**
Intraligamentary anesthesia is a regional anesthesia technique used to anesthetize the pulp of a tooth by injecting local anesthetic into the ligament surrounding the tooth. The success rate of this technique depends on various factors, including the patient's anatomy, the type of local anesthetic used, and the technique employed by the practitioner.

**Why the Correct Answer is Right**
The success rate of intraligamentary anesthesia is generally high, with a reported success rate of 80-90%. This is because the ligament surrounding the tooth is richly innervated with nerve fibers that transmit pain signals to the brain. When local anesthetic is injected into the ligament, it binds to the nerve fibers, blocking pain signals and providing effective anesthesia. The success rate can be further enhanced by using a needle with a small diameter and a gentle injection technique to avoid irritating the surrounding tissue.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not provide a specific percentage or range of success rates, making it a vague and unhelpful answer.
**Option B:** This option is incorrect because it suggests a much lower success rate than what is commonly reported in the literature, which may lead to underestimation of the effectiveness of the technique.
**Option C:** This option is incorrect because it implies that the success rate of intraligamentary anesthesia is 100%, which is not supported by clinical evidence.

**Clinical Pearl / High-Yield Fact**
To maximize the success rate of intraligamentary anesthesia, it is essential to use a needle with a small diameter and to inject the local anesthetic slowly and gently into the ligament. This technique helps to minimize tissue irritation and ensures effective anesthesia.

**Correct Answer: D. 90-100%**