Pretend you are a teacher preparing a quiz for the text I will provide. 
            Each quiz question should follow the format below. 
            Ensure that you carefully recheck the questions and answers for accuracy. 
            The output should be a ready-to-use list of dictionaries for the Python eval function:

            [

                    "question": "WRITE THE QUESTION HERE",
                    "options": ["A) OPTION_1", "B) OPTION_2", "C) OPTION_3", "D) OPTION_4"],
                    "answer": INDEX_OF_CORRECT_ANSWER_IN_OPTIONS_LIST,
                    "explanation": "EXPLAIN WHY THE ANSWER IS CORRECT"

            ]

            Text:
            ssues. 
5. Orientation of the bevel: although not significant to the success of the technique, it is recommended that the bevel of the needle face toward the root to permit easy advancement of the needle in an apical direction. 


6. Procedure:
Position the patient supine or semisupine .
Stabilize the syringe and direct it along the long axis of the root to be anesthetized. The bevel faces the root of the tooth.
With the bevel of the needle on the root, advance the needle apically until resistance is met.
Deposit 0.2 mL of local anesthetic solution in a minimum of 20 seconds. 
With a PDL syringe, each squeeze of the “trigger” provides a volume of 0.2 mL.

f. There are two important indicators of success of the injection: 
	i. Significant resistance to the deposition of local anaesthetic solution. This is especially noticeable when the conventional syringe is used . The local anaesthetic should not flow back into the patient’s mouth. If this happens, repeat the injection at the same site but from a different angle. 
	ii. Ischemia of the soft tissues adjacent to the injection site.
If the tooth has only one root, remove the syringe from the tissue and cap the needle. Dental treatment may usually start within 30 seconds
If the tooth is multirooted, remove the needle and repeat the procedure on the other root(s).
Signs and Symptoms :
 1. Subjective:
 There are no signs that absolutely assure adequate anaesthesia. When the following two signs are present, there is an excellent chance that profound anaesthesia is present:
	a. Ischemia of soft tissues at the injection site.
	b. Significant resistance to injection of solution (with a traditional syringe).
 2. Objective: use of a freezing spray (e.g., Endo-Ice) or an electric pulp tester (EPT) with no response from the tooth with maximal EPT output (80/80).
Precautions :
	1. Keep the needle against the tooth to prevent over insertion into soft tissues on the lingual aspect.
	2. Do not inject anaesthetic solution too rapidly (minimum 20 seconds for 0.2 mL).
	3. Do not inject too much solution (0.2 mL per root retained within tissues).
	4. Do not inject anaesthetic solution directly into infected or highly inflamed tissues.
Failures of Anaesthesia :
	1. Periapical infection. The pH and vascularity changes at the apex and periodontal tissues minimize the effectiveness of the local anaesthetic.	
	2. Solution not retained.
Complications :
   1. Pain during insertion of the needle:
	Cause 1: the needle tip is in soft tissues. 
	Cause 2: the tissues are inflamed. 
   2. Pain during injection of solution :
	Cause: too rapid injection of local anaesthetic solution. 
   3. Postinjection pain :
	Cause: too rapid injection.
Duration of Expected Anaesthesia:
The duration of pulpal anaesthesia obtained with a successful PDL injection is quite variable and is not related to the drug administered. for example, provides pulpal anaesthesia ranging in duration from 5 to 55 minutes.

Intraseptal Injection :
The intraseptal i

            Quiz: