Digital Versus Conventional Altered Cast Techniques For Constructing Mandibular Distal Extension Removable Partial Dentures Using Digitally Fabricated Frameworks: Alveolar Bone Height Changes

Digital Versus Conventional Altered Cast Techniques For Constructing Mandibular Distal Extension Removable Partial Dentures Using Digitally Fabricated Frameworks: A Clinical Comparative Parallel Study of Alveolar Bone Height Changes

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT05899712

Enrollment

Registered

2023-06-12

Start date

2023-05-15

Completion date

2025-05-10

Last updated

2025-06-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Denture, Partial, Removable

Brief summary

This clinical study compares between digital and conventional altered cast techniques using digitally constructed frameworks in removable partial dentures' construction regarding their effect on bone height changes around abutment teeth and in residual ridge.

Interventions

OTHERRemovable Partial Denture Construction

Construction of class I Removable partial denture by digital workflow

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

TRIPLE (Subject, Caregiver, Outcomes Assessor)

Eligibility

Sex/Gender

ALL

Age

50 Years to 60 Years

Healthy volunteers

Yes

Inclusion criteria

1. All patients having completely edentulous maxilla and class I Kennedy mandible. 2. Sufficient (not less than 15 mm) restorative space must be available (from the mucosa covering the crest of the residual ridge to proposed occlusal plane). This will be detected by a tentative jaw relation. 3. All patients are of angel's class I maxillo-mandibular relationships 4. Abutment teeth must meet certain requirements : A. Abutment teeth should be healthy with good periodontal and bone support. B. should not show advanced destructions. C. should not show a pronounced degree of mobility or advanced gingival recession. D. Crown Root Ratio for an abutment is 1:2

Exclusion criteria

1. Sever undercuts or concavities on the buccal or lingual sides of the ridge. 2. Systemic diseases that may affect bone changes such as diabetes and osteoporosis. 3. History of radiotherapy in the head and neck region. 4. Crown Root Ratio for an abutment is 1:1.

Design outcomes

Primary

Measure	Time frame	Description
Alveolar Bone Height Changes	one year	Alveolar bone height changes of abutment teeth and residual ridge.

Countries

Egypt

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026