Autogenous Bone Ring Versus Split Bone Block for Management of Posterior Atrophic Mandible

Alexandria University16 enrolled

Overview

Teeth loss in the posterior mandible initiates residual ridge resorption especially in vertical direction, this causes difficulty in implant placement so ridge augmentation must be done either simultaneous with implant placement or in a staged approach Aim: To evaluate the effect of bone ring technique versus split bone block technique with simultaneous implant clinically on primary and secondary

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

SINGLE

Enrollment

Conditions

Ridge Augmentation

Interventions

Bone RingOTHER

Patients in this group will be treated with the bone ring technique. An implant drill will be used next to prepare central osteotomies corresponding to the final implant diameter to be placed in the center of the disc converting it to a "bone ring".

Split Bone blockOTHER

Patients of this group will be treated with split bone block with simultaneous implant technique. The bone shell will be split into two bone shells each 1 \~ 2 mm in thickness using a disc.

Eligibility

Sex: ALLMin age: 35 YearsMax age: 50 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patients with missing posterior mandibular teeth. * Vertical bone defect from 3 to 4 mm. * Adequate zone of keratinized tissue. Exclusion Criteria: * Presence of infection or periapical lesions in adjacent teeth. * Medically compromised patients with a condition that affects the procedure. * Insufficient inter-arch distance. * Bruxism or clenching. * Alcoholism. * Heavy Smokers.

Locations (1)

Outpatient Clinic of Oral and Maxillofacial Surgery Department, Faculty of Dentistry, Alexandria University, Egypt

Alexandria, Azarita, Egypt

Outcomes

Primary Outcomes

Change in implant stability

Implant stability will be recorded immediately after placement (1ry stability) and after 6 months (2ry stability ) by using osstell device. The result is presented in form of ISQ value from 1to 100, the higher the ISQ the higher the stability of implant(

Time frame: Immediate and 6 months

Change in pain scores

Pain will be assessed for 7 days postoperatively using 10-point visual analouge scale (VAS) (0-1=None, 2-4=mild, 5-7=moderate, 8-10=severe ).

Time frame: up to 7 days

Change in marginal bone level

At buccal, lingual, mesial, and distal sites will be evaluated radiographically from the shoulder of the implant to the alveolar crest.

Time frame: 6 and 9 months

Secondary Outcomes

Change in bone density

Will be measured at 6 points around the implant and a mean value will be calculated using CBCT

Time frame: 6 months

Change in edema

Measured as follows: No inflammation = none. Intra oral swelling confined to the surgical field = mild. Extra oral swelling in the surgical zone =moderate. Extra oral swelling spreading beyond the surgical zone =intense.

Time frame: up to 7 days

Data from ClinicalTrials.gov

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