Influence of Acetal Resin Versus Nylon Elastic Cap on Crestal Bone Loss in Mandibular Implant-Supported Overdenture

Status

Not yet recruiting

Phases

Unknown

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT07666763

Acronym

AcetalResin

Enrollment

Registered

2026-06-24

Start date

2026-07-01

Completion date

2027-08-01

Last updated

2026-06-24

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

Conditions

Bone Loss, Pocket, Periodontal

Brief summary

Objective: To evaluate and compare the effect of two different attachment housing materials-Acetal Resin (Polyoxymethylene) versus conventional Nylon elastic caps-on marginal crestal bone loss around dental implants supporting a mandibular overdenture. It also evaluates peri-implant clinical tissue health by measuring pocket depth and the gingival bleeding index.

Detailed description

Study Design & Timeline: A prospective, double-blind, randomized controlled clinical trial with a 1:1 allocation ratio. Clinical and radiographic outcomes will be evaluated at overdenture insertion (baseline), and at 6 and 12 months post-insertion.ethodology & Analysis: Pre-operative bone volume will be assessed via Cone Beam CT (CBCT). Crestal bone loss will be measured using the long cone parallel radiographic technique , while pocket depth and gingival bleeding will be measured using a William's graduated probing device. Data will undergo normality testing to determine the use of parametric (Independent t-test, Repeated Measures ANOVA) or non-parametric (Mann-Whitney, Friedman) statistical analyse

Interventions

DEVICEAcetal Resin

overdenture supported by implants

DEVICEnylon

overdenture supported by implants

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

PREVENTION

Masking

TRIPLE (Subject, Caregiver, Outcomes Assessor)

Eligibility

Sex/Gender

MALE

Age

40 Years to 60 Years

Healthy volunteers

Yes

Inclusion criteria

* Completely edentulous mandible. * Sufficient bone height/width in mandibular residual ridges. * Angles classification class I. * Sufficient inter-arch distance

Exclusion criteria

* TMJ disorders. * Diabetic * Hypertensive * Cancer patients. * Smoker * Osteoporosis. * Immunosuppressive disease * Any disease affecting bone/implant stability.

Design outcomes

Primary

Measure	Time frame	Description
Change in crestal bone levels	one year	mm

Secondary

Measure	Time frame	Description
pocket depth changes	one year	mm

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 25, 2026