This clinical study investigates the sensation deficit in the lower lip and chin area after surgical correction of lower jaw deformity. The primary null hypothesis is: Lower jaw osteotomy cause no sensory deficit in the inferior alveolar nerve. The secondary null hypothesis is: Concurrent genioplasty with sagittal split does not increase the risk of sensory deficit in the inferior alveolar nerve.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
SUPPORTIVE_CARE
Masking
NONE
Enrollment
40
Surgical correction of lower jaw deformity by performing bilateral intraoral sagittal osteotomy of the mandible under general anesthesia.
Riyadh Elm University
Riyadh, Saudi Arabia
Light touch sensation first week
Light touch sensation will be measured using cotton wisp applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. The cotton wisp will be in touch with skin in the four quadrants and will be moved in four directions for each quadrant. The score will be recorded as 0 = No response to stimuli, 1= serious perception loss, 2 = hardly perceive sensation, 3 = perceive touch sensation at a lower degree than preoperative, and 4 = normal sensation.
Time frame: One week after the surgery
Light touch sensation first month
Light touch sensation will be measured using cotton wisp applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. The cotton wisp will be in touch with skin in the four quadrants and will be moved in four directions for each quadrant. The score will be recorded as 0 = No response to stimuli, 1= serious perception loss, 2 = hardly perceive sensation, 3 = perceive touch sensation at a lower degree than preoperative, and 4 = normal sensation.
Time frame: One month after the surgery
Light touch sensation three months
Light touch sensation will be measured using cotton wisp applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. The cotton wisp will be in touch with skin in the four quadrants and will be moved in four directions for each quadrant. The score will be recorded as 0 = No response to stimuli, 1= serious perception loss, 2 = hardly perceive sensation, 3 = perceive touch sensation at a lower degree than preoperative, and 4 = normal sensation.
Time frame: Three months after the surgery
Pinprick sensation first week
A tip of sharp dental explorer will be used to measure the pinprick sensation applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. The measurement will be recorded as a positive or negative response
Time frame: One week after the surgery
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Pinprick sensation first month
A tip of sharp dental explorer will be used to measure the pinprick sensation applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. The measurement will be recorded as a positive or negative response
Time frame: One month after the surgery
Pinprick sensation three months
A tip of sharp dental explorer will be used to measure the pinprick sensation applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. The measurement will be recorded as a positive or negative response
Time frame: Three months after the surgery
Static two points discrimination first week
A Vernier caliper will be used to measure static two-point discrimination applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. Instrument spikes of the caliper will be set open on different separation distances. The score will be recorded as 0 = more than 15 mm, 1 = 10-15 mm, 2 = 9-10 mm, 3 = 7-9 mm, 4 = 6-7 mm, 5 = equal or less than 5 mm.
Time frame: One week after the surgery
Static two points discrimination first month
A Vernier caliper will be used to measure static two-point discrimination applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. Instrument spikes of the caliper will be set open on different separation distances. The score will be recorded as 0 = more than 15 mm, 1 = 10-15 mm, 2 = 9-10 mm, 3 = 7-9 mm, 4 = 6-7 mm, 5 = equal or less than 5 mm.
Time frame: One month after the surgery
Static two points discrimination three months
A Vernier caliper will be used to measure static two-point discrimination applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. Instrument spikes of the caliper will be set open on different separation distances. The score will be recorded as 0 = more than 15 mm, 1 = 10-15 mm, 2 = 9-10 mm, 3 = 7-9 mm, 4 = 6-7 mm, 5 = equal or less than 5 mm.
Time frame: Three months after the surgery
Warm/cold test first week
The measure will be preformed using test tube filled with hot water at temperature 45-50 degrees Celsius, and an ice cube applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. The measurement will be recorded as a positive or negative response.
Time frame: One week after the surgery
Warm/cold test first month
The measure will be preformed using test tube filled with hot water at temperature 45-50 degrees Celsius, and an ice cube applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. The measurement will be recorded as a positive or negative response.
Time frame: One month after the surgery
Warm/cold test three months
The measure will be preformed using test tube filled with hot water at temperature 45-50 degrees Celsius, and an ice cube applied to the chin and lower lip area divided into four quadrants: upper right, upper left, lower right, and lower left. The measurement will be recorded as a positive or negative response.
Time frame: Three months after the surgery