Neoplasms

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ten patients with mandibular benign lesions which were treated with bone lid technique to enucleate the lesion using piezo-electric device to allow removal of buccal bone cortex with preservation of it to have access to lesion then reposition of bone lid in its place

ten patients with mandibular benign lesions in which the buccal cortex was removed by gridding using surgical rotary bur to allow enucleation of lesion

group I ten patients with mandibular lesion will be undergo excision of lesion using bone lid technique with piezo-electric device then reposition of buccal bone cortex

bone lid technique

group II ten patients with mandibular lesion will be undergo excision of lesion using surgical bur to remove buccal cortex to get access to lesion

standard technique

mona s sheta

Twenty patients with benign mandibular lesion will be included in this study. the patient will be divided randomly (10 patients each group). Group I the lesion will be treated using bone lid technique. Group II the lesion will be treated using the standard technique. The patients will be received, clinically and radiologically examined, and managed at the Oral and Maxillofacial surgery Department, Faculty of Dentistry, Tanta University.

The patients will be evaluated clinically to evaluate healing and radiographically using cone beam CT (CBCT) scan to identify bone healing, the extension and the volume of lesion six months later

Purpose: This study aimed to compare the clinical and radiologic outcomes of the bone lid technique performed using a piezoelectric device versus the traditional technique in patients requiring excision of the mandibular bony lesions

Materials \& Methods: Twenty patients with mandibular lesion will be included in this study. the patient will be divided randomly (10 patients each group). Group I the lesion will be treated using bone lid technique. Group II the lesion will be treated using the standard technique. The patients will be received, clinically and radiologically examined, and managed at the Oral and Maxillofacial surgery Department, Faculty of Dentistry, Tanta University.

Preoperative evaluation: The patients will be evaluated clinically and radiographically using Cone beam CT(CBCT) scan to identify the extension and the volume of lesion.

Surgical procedure: A full thickness flap will be elevated in both groups to achieve access to the bone above the lesion, in group I osteotomy of bone will be designed to extend beyond the actual extension of lesion in radiograph using piezoelectric device to secure a latter repositioning of the lid on a healthy stable bone. The osteotomy will be performed with an internal bevel angle to facilitate repositioning. The removed bone lid will be soaked in saline. After excision of the lesion, the bony lid will be repositioned to its original position and fixed to the bone with an absorbable suture.

In group II the bone will be removed buccally using surgical bur then the lesion is removed. Finally, the flap will be sutured in both groups.

Postoperative evaluation: The patients will be evaluated clinically regarding healing, presence of infection, inflammation, necrosis, or bone exposure each week for one month then monthly for six months.

Radiographically, (CBCT) scan six months later to evaluate Healing and integration of the repositioned bone lid, any signs of recurrence in the case of cysts, and filling of the bone defect bone healing and volume of the defect.

All selected cases of both groups b were went for CBCT scan using fixed exposure parameters (Kv, mA) and the same field of view prior surgery and 6 months post-surgical using the same axial slicing to evaluate the following

1. Cyst area in coronal view for posterior region and sagittal view for anterior region
2. Evaluating lesion location by making perpendicular line from alveolar crest on the occlusal plane and measuring the distance from alveolar crest to the lesion using (Coronal view posterior, sagittal anterior).

3- recurrence of lesion , integration of buccal cortex 4- bone density

Bone Lid Technique Versus Standard Technique for Treatment of Mandibular Lesions

Lecturer of Oral and Maxillofacial Surgery

using visual analogue scale:0 represent no pain and 10 represents the highest level of pain

adequate means closed or inadequate means open wound

1 means mild,2 means moderate or3 means sever infection

making perpendicular line from alveolar crest on the occlusal plane and measuring the distance from alveolar crest to the lesion in (mm) using (Coronal view posterior, sagittal anterior) in CBCT.

CBCT to measure density (D1\> 1250 ,D2 850-1250,D3 350-850,D4 150-350) hounsfield

0 no inflammation 1-3 mild inflammation 4-7 moderate inflammation 8-10 sever inflammation

presence of radiolucency around of buccal cortex or not

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Bone Lid Technique Versus Standard Technique for Treatment of Mandibular Lesions	NCT05987930	Mandible Cyst Mandible Tumor Mandibular Dise...	bone lid techni... standard techni...	6 Years -	Tanta University
Bone Lid Technique Versus Standard Technique for Treatment of Mandibular Lesions	NCT05987930	Mandible Cyst Mandible Tumor Mandibular Dise...	bone lid techni... standard techni...	6 Years -	Tanta University

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