| Field | Value |
|---|---|
| ID | OA-0149 |
| Type | retention |
| Category | retention |
| Fixed/removable | removable |
| Primary function | post-treatment retention; minor tooth movement |
| Malocclusion target | retention (all post-treatment cases) |
| Inventor | Charles A. Hawley |
| First year | 1919 |
| Period | historical / current |
| Status | current |
| Uses TADs | no |
| Wire specs | Labial bow: 0.028″ (0.7 mm) SS; Adams clasps: 0.028″ SS |
| Expected lifespan | 5–10 years with proper care |
The Hawley retainer is a removable acrylic baseplate appliance with a wire framework that has been the orthodontic retention standard for over a century. The acrylic base seats against the palate (upper) or covers the lingual surface of the lower anterior teeth (lower), while a labial bow with U-loops contacts the facial surface of the anterior teeth. Adams clasps (or ball clasps, C-clasps) on the posterior teeth provide retention. Its longevity in clinical practice comes from three unique advantages: the labial bow is adjustable for minor tipping corrections, the acrylic can be added to or trimmed, and when broken it can almost always be repaired rather than replaced.
The Hawley retainer maintains tooth positions through passive contact. The labial bow rests lightly against the anterior teeth, preventing labial flaring; the acrylic base supports the palate and posterior segments. Because the bow can be activated, the retainer can perform minor mesio-distal and labial tipping corrections after delivery — a capability that clear retainers lack. The appliance allows natural occlusal settling (interdigitation) because it doesn't cover the occlusal surfaces, which is clinically beneficial after brace removal.
Post-orthodontic retention in any case (braces or clear aligner treatment). Particularly preferred when minor post-treatment tooth position corrections are anticipated (bow can be re-activated at each recall visit); in patients with heavy bruxism (more durable than thermoformed retainers); when occlusal settling is desirable after comprehensive treatment; or when a patient cannot tolerate full-coverage retainers due to gag reflex (upper Hawley leaves more palate exposed than a clear retainer). Also used as a simple space maintainer or as a phase I retention appliance.
Patient compliance is the main limitation — the appliance must be worn as instructed. Studies show compliance rates ~10–20% lower than clear retainers (67% vs 89% at 12 months) due to aesthetics and speech effects. The labial bow can create anterior open bite if over-activated; excessive acrylic can cause tissue irritation. Not indicated as the sole long-term mandibular anterior retainer — many clinicians pair with a bonded retainer canine-to-canine.
2–3 mm thick; provides palatal coverage and posterior support.
canine to canine with a U-loop at each canine for adjustment.
(standard); Adams clasp engages the mesiobuccal and distobuccal undercuts of the molar.
habit cribs, expansion screws.
Clasps are adapted first directly on the model; labial bow is then bent so the horizontal portion contacts the middle third of the anterior teeth. The acrylic is built up by layering or salt-and-pepper technique, then cured and trimmed. Polish all tissue-facing surfaces to a smooth finish — rough acrylic causes tissue irritation and plaque accumulation. For the modified Hawley variants (Mod Hawley), the bow design varies: flat labial wire in the vestibule for minimal anterior contact, or a wraparound bow that extends to the posterior. CFL's extensive SKU list covers upper/lower, standard/modified, 2-clasp through 6-clasp, and Adams-clasp variants — the difference in price reflects clasp count and complexity.
anterior contact patterns; common in practices that want less anterior tipping tendency.
around all teeth to the molars.
minor expansion during retention.
correction.
mixed-dentition habit cases.
bonded retainer is not placed.
PMC](https://pmc.ncbi.nlm.nih.gov/articles/PMC9954726/)
Labs](https://odlortho.com/hawley-retainers-your-complete-guide-to-post-braces-smile-maintenance/)
Lab](https://www.roedentallab.com/knowledge-base/what-are-the-primary-clinical-indications-for-hawley-retainers)
Dentistry](https://pocketdentistry.com/14-retention-appliances/)
indications, business notes.