Impact of Mandibular Canal Trajectory on Paresthesia After Inferior Alveolar Nerve Lateralization

Marmara University20 enrolled

Overview

This prospective cohort study aims to investigate the relationship between mandibular canal trajectory and the duration of postoperative paresthesia in patients undergoing inferior alveolar nerve lateralization. The study will assess mandibular canal trajectory using anatomic factors and evaluate nerve sensory function using subjective and objective tests. Implant success criteria will also be assessed. The study will be conducted on patients who underwent IANL due to mandibular atrophy and were unable to receive standard or short implant placement. Data will be collected at regular follow-up visits up to 1-year post-surgery.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Alveolar Bone Loss Neurosensory Disorder

Eligibility

Sex: ALLMin age: 18 YearsMax age: 65 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patients with atrophied posterior mandible with less than or equal to 6 mm of bone over the inferior alveolar canal * No previous grafting or implant surgery at the site where nerve lateralization is planned * No neurosensory impairment * No contra-indications for implant surgery Exclusion Criteria: * Patients who have undergone radiotherapy in the associated area * Patients using bone-modifying agents * Smokers with daily consumption of more than ten cigarettes * Patients with neurosensory impairment due to trauma, tumor, or cancer

Locations (1)

Outcomes

Primary Outcomes

Light touch test results

The light touch test is a common diagnostic tool used to assess sensory perception. Patients' lower lip and chin areas will be gently stroked with a soft object, such as a piece of cotton or a brush. The patients will then be asked to report their sensation. If they feel the touch, the response is considered normal. However, any reported changes, such as numbness or tingling, can indicate possible nerve damage or recovery after surgery.

Time frame: Visits at 10 days, 1 month, 2 months, 3 months, 6 months, and 1 year after surgery

2-point discrimination test results

The 2-point discrimination test is a neurological examination used to measure tactile spatial acuity. Two points of a caliper will be applied to the patients' lower lip and chin areas. The distance at which a patient can no longer differentiate between the two points provides an indicator of sensory nerve function. Any reported changes in the ability to distinguish between two points may suggest alterations in nerve sensitivity or recovery after surgery.

Time frame: isits at 10 days, 1 month, 2 months, 3 months, 6 months, and 1 year after surgery.

Secondary Outcomes

Thickness of the buccal cortex

This outcome measure evaluates the thickness of the buccal cortex using radiographic measurements obtained from CBCT scans.

Time frame: At baseline

Thickness of the mandibular inferior border

This outcome measure evaluates the thickness of the mandibular inferior border using radiographic measurements obtained from CBCT scans.

Time frame: At baseline

Diameter of the nerve canal

This outcome measure evaluates the diameter of the nerve canal using radiographic measurements obtained from CBCT scans.

Time frame: At baseline

Distance from the nerve canal to the buccal cortex

This outcome measure evaluates the distance from the nerve canal to the buccal cortex using radiographic measurements obtained from CBCT scans.

Time frame: At baseline

Distance from the nerve canal to the inferior border of the mandible

This outcome measure evaluates the distance from the nerve canal to the inferior border of the mandible using radiographic measurements obtained from CBCT scans.

Time frame: At baseline

Change in Implant stability quotient (ISQ) values:

The Implant Stability Quotient (ISQ) is a metric ranging from 1 to 100 that is used to assess implant stability within the bone, with higher values indicating greater stability. To determine ISQ values, resonance frequency analysis (RFA) or sound waves are passed through a specialized peg attached to the implant.

Time frame: During implant placement and follow-up visits at 3 months.

Change in peri-implant bone resorption

This outcome measure evaluates peri-implant bone resorption using OPTG. The amount of bone loss around the implant will be assessed and recorded.

Time frame: At 3 months, and 12 months after surgery.

Patient satisfaction

This outcome measure assesses patient satisfaction using a visual analog scale. Patients will be asked to rate their satisfaction with the treatment outcome at the 12-month follow-up visit.

Time frame: At 12 month follow-up visit