Using the Roots of a Non Restorable Wisdom Tooth as a Block for Augmentation of Localized Defects (Clinical)

Ain Shams University

Status and phase: Unknown; Phase 4

Conditions: Augmentation

Treatments: Procedure: tooth block; Procedure: autogenous bone block

Study type: Interventional

Funder types: Other

Identifiers

NCT04266652

121734

Details and patient eligibility

About

assess and compare the efficacy and safety of autogenous tooth roots for lateral alveolar ridge augmentation with staged implant placement in comparison to autogenous bone block.

Full description

A total of 14 patients in need of implant therapy and lateral ridge augmentation were allocated to parallel groups receiving either 1) healthy autogenous tooth roots (e.g. retained wisdom or impacted teeth or 2) cortical autogenous bone blocks harvested from the retromolar area. After 26 weeks of submerged healing the horizontal bone gain were assessed both clinically and radiographically. A core biopsy was taken during the implant placement to assess the histology of the newly formed bone.

Enrollment: 14 estimated patients

Sex: All

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Candidate for lateral ridge augmentation
2. Insufficient bone ridge width at the recipient site for implant placement
3. Sufficient bone height at the recipient site for implant placement
4. Healthy oral mucosa, at least 3 mm keratinized tissue.
5. Presence of wisdom teeth free from periapical infection.
6. Missing maxillary or mandibular tooth with moderate horizontal defect (4-8) according to cologne classification

Exclusion criteria

• 1. Patients are systemically free according to Modified Cornell Medical Index 2) smokers patients. 3) Pregnant or lactating women.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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14 participants in 2 patient groups

Autogenous bone block

Experimental group

Description:

the monocortical block grafts were harvested from the retromolar region (i.e. linea oblique) by using of rotating (i.e. carbide burs)

Treatment:

Procedure: autogenous bone block

Tooth block

Experimental group

Description:

In the first group, a second mucoperiosteal flap was elevated to surgically remove the respective wisdom tooth. After its removal and during the same surgery, the crown was decapitated at the cemento -enamel junction using a rotating carbide bur under gentle sterile saline cooling and the exposed pulp was preserved. The separated tooth root was adapted to match the size and shape of the defect area. To improve ankylosis between the graft and the defect site, the layer of cementum at the respective downward aspects of the root was carefully removed using a diamond bur until the underlying dentin was entirely exposed

Treatment:

Procedure: tooth block