Evaluation Of New Shape of 3D Bone Plate in the Treatment of Posterior Mandibular Fractures

ten patients with posterior mandibular fractures involving the body or angle region, were treated with pin buckle bone plate

Procedure: ORIF using Pin Buckle bone plate

ten patients with posterior mandibular fractures involving the body or angle region, were treated with conventional two miniplates

Procedure: ORIF using conventional two miniplates

open reduction and internal fixation

Open Reduction and Internal Fixation

Plazo: Immediately postoperatively (baseline), 3 months, and 6 months postoperatively.

The width of the fracture line will be measured in millimeters using DIGORA image analysis software on standardized digital panoramic radiographs. Measurements will be performed at three standardized points (superior, middle, and inferior) along the visible fracture line, and the mean value will be calculated. Changes from baseline will be assessed at 3 and 6 months postoperatively and compared between the study and control groups.

Plazo: Immediately postoperatively (baseline), 3 months, and 6 months postoperatively.

Radiographic bone healing will be assessed by measuring the mean grayscale value at the fracture site using DIGORA image analysis software on standardized digital panoramic radiographs. Measurements will be performed using a standardized region of interest (ROI) at the immediate postoperative baseline, 3 months, and 6 months postoperatively. The change in mean grayscale values from baseline to 3 and 6 months will be evaluated and compared between the study and control groups.

Plazo: Postoperative days 1, 7, and 14.

Postoperative pain intensity will be evaluated using a 10-cm Visual Analogue Scale (VAS), ranging from 0 (no pain) to 10 (worst pain imaginable). Patients will be asked to indicate their pain intensity at each follow-up assessment. Pain scores will be compared between the study and control groups.

Plazo: Preoperatively (baseline) and postoperative days 1, 7, and 14.

Facial edema will be assessed using standardized tape measurements between two anatomical landmarks: the tragus and corner of the mouth, and the lateral canthus and gonion. The sum of the two measurements will be calculated. Changes in the summed measurements relative to the preoperative baseline will be used to evaluate postoperative facial edema and compared between the study and control groups.

Plazo: Postoperative days 1, 7, and 14.

Wound healing will be evaluated clinically using a structured scoring system consisting of five parameters: wound size reduction, tissue appearance, wound exudate, pain and inflammatory response, and mucosal integrity. Each parameter will be scored from 0 (poor) to 2 (good), resulting in a total score ranging from 0 to 10, with higher scores indicating better wound healing. Total wound healing scores will be compared between the study and control groups.

Plazo: Immediately postoperatively and 6 months postoperatively.

Fracture stability will be assessed by bimanual digital palpation to detect mobility between fracture segments during functional mandibular movements and manual manipulation. Fractures will be classified as stable (absence of detectable movement) or unstable (presence of detectable movement). The proportion of stable fractures will be compared between the study and control groups.

Clinical And Radiographic Evaluation Of Pin Buckle Bone Plate in the Treatment of Posterior Mandibular Fractures: A Randomized Study