Implant or denture for a missing tooth? Seven conditions decide—not a comparison chart

Implant or denture for a missing tooth? Seven conditions decide—not a comparison chart

Direct answer in 60 characters

There is no universal answer. For adults with reduced dentitions, a systematic review found insufficient evidence to recommend one replacement strategy over another [F2]. Adjacent teeth, bone, general health, and ability to maintain the result must be assessed by a dentist.

Geographic scope: This guide is specific to Taiwan's healthcare system (National Health Insurance and Taiwan's Medical Care Act). Medical-evidence sections cite international literature and professional guidelines and mark each F-Unit geo: universal; sections on cost, benefits, and verification channels are marked geo: TW. Readers elsewhere should use the rules of their own jurisdiction.

Why a single comparison chart usually cannot answer this question

People searching for “implant or denture” often want a two-column chart that produces an immediate winner. Many such charts exist, but they share a structural problem: they assume the winner in each row is the same for everyone. The variables that decide the answer are not in the chart; they are in your mouth and medical history.

The evidence points the same way. A systematic review of 10 articles states that current evidence is insufficient to recommend one tooth-replacement strategy over another. Its population was adults with shortened or reduced dentitions, not every missing-tooth situation [F2]. A broader Cochrane review of people with partially absent dentitions is now WITHDRAWN and is marked “Retracted Publication” in PubMed. Under this site’s rules it is not clinical evidence. It is listed only to document honestly that a current claim such as “Cochrane says one denture is better” has no valid source in that review [F3].

This card therefore takes a different form: it does not rank treatments; it lays out, one by one, the conditions a dentist considers, and explains how each condition may move options forward or backward. This is an editorial communication framework, not a clinical criterion or diagnostic tool [F1].

First align the terms: “denture” covers three different things here

Many disagreements begin with mismatched terms. In dental classification:

• Fixed dental prosthesis: cemented or bonded to teeth and not removable by the patient. This includes a single crown, a conventional bridge supported by prepared adjacent teeth, and a resin-bonded bridge that removes less tooth tissue.
• Removable denture: a partial or complete denture that the patient can remove for cleaning.
• Implant-supported prosthesis: the implant is the support, but a crown or prosthesis is still placed on it. Strictly speaking, an “implant” is not the opposite of a “denture”; it is another way to support a prosthesis. Support may come from an implant, adjacent teeth, or mucosa and remaining teeth [F1].

That distinction matters. When you ask “implant or denture,” the real comparison is between support methods, and whether a support method is feasible depends directly on the seven conditions below [F1].

How this card divides work with other cards

This site has several cards for this group of questions. Each has its own job; this card points to them rather than duplicating them:

• Survival and complication figures for each option, plus the full answers to “Do I have to get an implant?” and “What if I cannot afford replacement?” belong to KM-DENTAL-35. This card does not repeat any option-specific survival figures [F1].
• What can change if a tooth is not replaced, and the full shortened-dental-arch discussion belong to KM-DENTAL-34 [F1].
• The components of fixed-prosthesis costs and how to read a quotation belong to KM-DENTAL-3; removable dentures to KM-DENTAL-13; implant costs to KM-DENTAL-9 [F1].
• The cost of preparing adjacent teeth belongs to KM-DENTAL-45 and KM-DENTAL-22.

This card addresses the gap between them: how conditions rule options in or out.

Condition 1: the adjacent teeth

A conventional bridge requires irreversible preparation of the teeth beside the gap as abutments. The full discussion belongs to KM-DENTAL-45; here are two facts directly relevant to the decision [F1].

• A systematic review of 26 studies found that the 5-year survival of fixed dental prostheses on vital abutments (84.9%) was significantly higher than on non-vital abutments (81.3%, P = 0.049), regardless of post presence or type and prosthesis material. The authors also state that the result is limited by few studies and uncontrolled clinical confounders [F5].
• Another review selected 20 studies from 10,075 records, with 7 entering meta-analysis. For vital teeth used as fixed-prosthesis abutments, clinical and radiographic success ranged from 92% to 98% across follow-up periods of 5 to 20 years [F4]. This outcome is pulpal and periapical status, not survival of the bridge itself; all included studies were observational and heterogeneity was high [F4].

How this condition changes the options:

• If adjacent teeth already need crowns because of large restorations, prior root-canal treatment, or crowns that need replacement, incorporating them into a bridge has a smaller marginal cost because those teeth already require treatment.
• If adjacent teeth are intact, healthy, and unrestored, the irreversible loss of tooth tissue must be counted among the costs of a fixed option. Directions discussed in the literature include a resin-bonded bridge with less preparation (KM-DENTAL-22) and an implant-supported crown that does not use adjacent teeth. Each has its own indications and limits [F1].
• A review spanning prosthodontics and periodontology states that planning must consider prosthesis design, the number and quality of abutment teeth, preparation and pontic, occlusion, and material [F6]. Whether a tooth can serve as an abutment is therefore not judged by appearance alone; a dentist must assess periodontal support and remaining tooth structure.

Condition 2: location and distribution of the missing teeth

• One tooth missing between teeth on both sides: all three support approaches may be anatomically possible. Conditions 1 and those below then carry more weight.
• A distal-extension gap at the end of the arch: there is no posterior tooth to serve as an abutment, so a conventional bridge is structurally unavailable. Options discussed in the literature include a removable partial denture and an implant-assisted removable partial denture. A systematic review of 19 studies on implant-assisted removable partial dentures for distal-extension areas reported marginal bone loss from 0.3 mm to 2.30 mm and higher patient satisfaction than with conventional removable partial dentures or before treatment. Prosthetic-complication findings were heterogeneous and inconclusive, and most included studies concerned Kennedy Class I [F7]. This card does not use that review’s survival figures; option-specific survival belongs to KM-DENTAL-35 [F1]. The evidence shows that this is not necessarily a binary “implant versus denture” choice; the two can be combined.
• Several consecutive teeth missing with few opposing pairs remaining: masticatory performance may be affected. A systematic review found comminution or mixing ability 28% to 39% lower in shortened and extremely shortened dental arches than in complete dentitions; distal-extension removable dentures could recover part of that gap (about half) [F8]. This summary is anchored to KM-DENTAL-34 and KM-DENTAL-35; their full analyses are not repeated here [F1].
• Complete or extensive tooth loss belongs to the full-mouth rehabilitation scope of KM-DENTAL-32 and is not covered here [F1].

Condition 3: bone quantity and quality

An implant is placed in bone, so bone quantity and quality are thresholds specific to that pathway. Fixed and removable prostheses do not require an implant, so bone carries much less weight for those routes.

• When bone is insufficient, one direction in the literature is bone augmentation. A systematic review of 11 prospective studies, limited to residual bone height of 6 mm or less and follow-up of at least 5 years, estimated an annual implant-loss rate of 0.43% (95% confidence interval 0.37% to 0.49%) after lateral-window maxillary sinus floor augmentation. Meta-regression found no significant difference between simultaneous and delayed implant placement [F9].
• Another direction is a shorter implant. A GRADE-rated systematic review of 19 randomized trials, 40 reports, and 2214 implants found moderate- to high-certainty evidence of similar 5-year survival for implants 6 mm or shorter versus 10 mm or longer in non-augmented native bone and full-mouth rehabilitation, and that a 6-mm implant could substitute for sinus augmentation in the maxilla. The same review also states that evidence remains inconclusive or insufficient for 4-mm and 5-mm implants as alternatives to sinus augmentation and for implants 6 mm or shorter instead of vertical ridge augmentation [F10].

How this condition changes the options: insufficient bone does not mean “bone grafting is the only choice,” “implant treatment is impossible,” or “you should get an implant.” It turns a simple binary choice into branches with different prerequisites. A dentist must use imaging to assess actual bone height, width, and tooth location. If you do not want or are not suited to additional bone-augmentation surgery, fixed and removable prostheses do not require that step and remain directions discussed in the literature [F1].

Condition 4: general health and current medication

This condition is often overlooked, yet it may change the answer most. Every item below must be read together with its population.

Diabetes and glycaemic control: a systematic review and meta-analysis of 48 studies found that, among patients with diabetes, those with good glycaemic control had a significantly lower risk of peri-implantitis than those with poor control (odds ratio 0.16, 95% confidence interval 0.03 to 0.96) [F11]. The authors classified this as indirect evidence and noted limitations. This is a within-diabetes comparison; it does not mean that diabetes rules out implants or that good control removes all risk.

Antiresorptive drugs used for osteoporosis or cancer: dose and indication must be separated, or the conclusions point in opposite directions.

• A review of medical and geriatric factors states that implant therapy cannot be recommended under high-dose bisphosphonate and antibody therapy and that bone grafting should be avoided under antiresorptive therapy. The same review states that age over 75 does not affect implant survival in short follow-up of 1 to 5 years and concludes that risk assessment should be based not on age but on patient-specific factors such as diseases and medication [F12]. Its methods describe a narrative literature review, with searches only through 2019-02 [F12].
• A 2025 systematic review and meta-analysis limited to people with osteoporosis or osteopenia—the low-dose setting reported a relative risk of implant failure of 0.82 (95% confidence interval 0.52 to 1.28; very low certainty) among those exposed to antiresorptives. It identified 186 cases of implant-related medication-related osteonecrosis of the jaw. The pooled post-implantation rate from 21 cohorts was 0.5%. One risk-adjusted report found 3 additional cases per 1000 patients with bisphosphonates (adjusted hazard ratio 4.09, 95% confidence interval 2.75 to 6.09; moderate certainty) [F13].
• The honest synthesis is that osteoporosis dosing and high-dose cancer treatment are different risk levels, and figures from one must not be applied to the other. Even at the low-dose end, osteonecrosis of the jaw is a documented complication with risk-adjusted evidence [F12][F13]. This card gives no advice to stop, switch, or adjust medication. Medication changes are the prescriber’s responsibility; surgical suitability must be assessed jointly by your dentist and treating physician.

History of head-and-neck radiotherapy: a 2025 systematic review identified 9 studies and included 7 in meta-analysis. Among patients with head-and-neck cancer, implant survival was significantly lower in irradiated patients (85.6%) than in non-irradiated patients (90.0%) (relative risk 1.62, 95% confidence interval 1.33 to 1.98). In the head-and-neck-cancer population of the same review, failure risk was higher in grafted bone than in native bone (relative risk 2.03, 95% confidence interval 1.39 to 2.96) [F14]. Both figures are limited to patients with head-and-neck cancer and must not be extrapolated to bone grafting for the general population. The source did not limit the latter comparison to the irradiated subgroup, so this card reads it directly as applying to the review’s overall study population, neither narrowing nor broadening it [F14].

Smoking and history of periodontitis: an umbrella review of 12 articles and 41 meta-analyses rated none of the 41 associations as convincing. The two rated “highly suggestive” were presence of periodontitis (odds ratio 3.84) and cigarette smoking (relative risk 2.07) [F15]. This is a summary anchored to KM-DENTAL-35 [F1].

The other side matters too: these conditions mainly affect risk assessment for the implant route, but other options also have conditions. Fixed prostheses depend on the number and quality of abutment teeth [F6], while removable dentures depend on support from mucosa and remaining teeth. In patients with a history of periodontitis, two retrospective studies in a systematic review indicated greater tooth-loss risk with removable than fixed prostheses, and several studies indicated more plaque accumulation. Yet the review’s conclusion also states that there is no strong evidence that removable partial dentures themselves cause periodontal destruction, including tooth loss [F16].

Condition 5: feasibility of cleaning and follow-up

• The same 48-study review found a lower risk of overall peri-implant diseases among people who regularly received supportive periodontal or peri-implant care (odds ratio 0.42, 95% confidence interval 0.24 to 0.75). Implant-failure risk appeared higher with irregular or no supportive care (odds ratio 3.76, 95% confidence interval 1.50 to 9.45) [F11].
• A 2026 systematic review of 25 studies—9 randomized trials, 13 cohort studies, and 3 case-control studies—reported that supportive peri-implant therapy, particularly individualized risk-based recall intervals, consistently improved clinical outcomes such as probing depth and bleeding on probing compared with standard or no maintenance. The authors also said that high clinical and methodological heterogeneity, inconsistent documentation of systemic conditions, and variation in adjunctive therapy limited firm conclusions and generalizability [F17].
• The European Federation of Periodontology S3 guideline states that once implants are loaded and functioning, a structured supportive peri-implant care program should include periodic assessment of peri-implant tissue health [F18].

Both sides must be stated:

• Patient-reported evidence has recorded a cleaning advantage for a removable design, but the population must be read carefully. A consensus report says edentulous patients highly rated both removable and fixed implant-supported prostheses, while rating their own ability to maintain oral hygiene significantly higher with the removable one [F19]. Both comparators were implant-supported and the population was edentulous, so this cannot be read as “an ordinary removable partial denture is easier to clean than a bridge.” It supports only higher self-rated cleaning ability in that population and comparison [F19]. Whether it applies to you requires individual assessment.
• A fixed prosthesis need not be removed, but cleaning beneath a pontic requires tools and technique. A prosthodontic-periodontal review states that even an optimal pontic design cannot prevent inflammation of adjacent mucosa if plaque is not removed and pontic hygiene is not maintained [F6].

How this condition changes the options: if limited hand dexterity, vision, or daily routine makes consistent cleaning difficult, or regular follow-up is hard to attend, the long-term result of every option can be affected. This does not push everyone toward one treatment. It means maintenance burden belongs in the comparison and your actual circumstances should be described honestly in the clinic.

Condition 6: time

• After implant placement, osseointegration takes time; the wait depends in part on loading timing. A 2026 meta-analysis extracted 40 unique trials and more than 1200 single implants, followed for 1 to 10 years, from 7 systematic reviews and 2 additional randomized trials. It found no statistically significant difference in implant survival between immediate and conventional loading at 1, 2, 3, or 5 years (relative risk about 1.00); marginal-bone-loss differences were small and clinically negligible, and patient satisfaction did not differ significantly. Certainty was moderate for survival and low to very low for secondary outcomes [F20]. The review’s conclusion includes the condition “when applied under appropriate clinical conditions” [F20].
• Change the population and the direction is not identical. A 2019 meta-analysis of 39 trials (49 articles) covering varied fixed-prosthesis settings reported statistically lower survival with immediate than conventional loading when the implant was the statistical unit (relative risk 0.974, 95% confidence interval 0.954 to 0.994), while immediate and early loading were comparable [F21].
• The honest synthesis: the reviews differ in population and eligibility—the 2026 review is limited to single implants, while the 2019 review covers varied fixed prostheses—so their directions are not identical. The shared message for a consultation is: treatment can sometimes be shortened, but only under conditions. Whether it can be shortened depends on bone conditions and initial implant stability and must be decided by a dentist. This card estimates no individual treatment duration [F1].
• If bone augmentation is needed, treatment takes longer; the sinus-floor-augmentation review above included both simultaneous and delayed placement [F9].
• Fixed and removable prostheses also require their own impression, try-in, and adjustment visits. Those workflows belong to KM-DENTAL-3 and KM-DENTAL-13 and are not repeated here [F1].

Condition 7: your preferences and access

When the literature gives no winner, the question is not “Which is objectively best?” but “Which fits your life?”

• A current systematic review concludes that evidence is insufficient to recommend one tooth-replacement strategy over another, within adults with shortened or reduced dentitions [F2]. The Cochrane-level review has been withdrawn and offers no current valid conclusion [F3].
• A consensus report says patient-reported outcomes—including satisfaction and oral-health-related quality of life—should be collected in every clinical study of implant rehabilitation and should supplement other clinical parameters in the clinical definition of success [F19].

What matters most to you is therefore not an optional extra in the literature; it is part of assessment [F19]. Before the appointment, consider whether you most want to avoid surgery, avoid preparing adjacent teeth, remove the prosthesis for cleaning, shorten treatment, or reduce maintenance visits. Stating those priorities allows the dentist to rank the options that remain feasible for you [F1].

How to ask about cost (this card lists no prices)

This section concerns Taiwan’s system and is marked geo: TW. Readers elsewhere should use the rules of their own jurisdiction.

• Taiwan has no single nationwide dental price list. Under Article 21 of Taiwan’s Medical Care Act, the fee standards charged by medical care institutions are approved by the competent authority of each special municipality or county/city [F22]. The system-level way to ask “How much?” is therefore: how does the approved fee schedule in the municipality or county/city where you receive care itemize the charges?
• The prosthesis itself is generally self-paid. Article 51 of Taiwan’s National Health Insurance Act excludes dentures and other appliances without active therapeutic function from benefit coverage [F23]. Whether an individual diagnostic or treatment service is covered, and under what conditions, depends on current National Health Insurance Administration announcements. This card makes no coverage determination.
• A verifiable channel: Taiwan’s Government Data Open Platform lists the “Taipei City Medical Fee Standards,” provided by the Taipei City Government Department of Health and updated irregularly [F24]. For self-paid items, ask the provider for a written itemized statement.
• Avoid an unnecessary search: neither of the two category tracks in the National Health Insurance Administration’s “Medical Device Price Comparison” site contains dental items, so dental self-paid items cannot be checked there [F25].
• You may ask for an explanation. Article 81 of Taiwan’s Medical Care Act requires a medical care institution, when treating a patient, to inform the patient or specified related person about the condition, treatment policy, disposition, medication, prognosis, and possible adverse reactions [F26]. State your budget and ask the dentist to explain a feasible treatment sequence on that basis.
• Cost components and how to read a quotation belong respectively to KM-DENTAL-9 (implants), KM-DENTAL-3 (fixed prostheses), and KM-DENTAL-13 (removable dentures). This card neither repeats them nor ranks options by expense [F1].

For the official English translation of Taiwan’s Medical Care Act, see the Laws & Regulations Database of the Republic of China (Taiwan): https://law.moj.gov.tw/ENG/LawClass/LawAll.aspx?pcode=L0020021

Risk factors and limitations

Every route has tradeoffs; they are listed symmetrically here:

• Implant-supported: requires surgery and adequate bone. Periodontitis and smoking are highly suggestive risk factors for peri-implantitis [F15]; glycaemic control is associated with peri-implantitis risk among patients with diabetes [F11]; the literature does not recommend implant therapy under high-dose antiresorptive treatment and says bone grafting should be avoided under antiresorptive therapy [F12], while osteonecrosis of the jaw is still recorded at the low-dose end [F13]; survival is lower among those with a history of head-and-neck radiotherapy [F14]; and structured long-term supportive care is needed after loading [F18].
• Conventional bridge (fixed prosthesis): requires irreversible preparation of adjacent teeth, discussed fully in KM-DENTAL-45 [F1]. Five-year survival is lower on non-vital than vital abutments [F5], and adjacent mucosa may still become inflamed if cleaning beneath the pontic is not maintained [F6].
• Removable denture: increases plaque accumulation. In people with a history of periodontitis, retrospective studies found higher tooth-loss risk than with fixed prostheses, but the same review concluded that strong evidence is lacking that removable dentures themselves cause periodontal destruction [F16]. Masticatory compensation is incomplete; a distal-extension removable denture recovered about half of the gap [F8].
• Implant-assisted removable denture: the review reported a favorable direction for patient satisfaction, but prosthetic-complication findings were heterogeneous and inconclusive and most studies involved Kennedy Class I [F7].
• Shared premise: all of the above are study-level population figures and associations. They cannot predict your individual result and cannot replace clinical diagnosis. Missing-tooth rehabilitation—including implants, bridges, and removable dentures—has risks and contraindications; the actual method and outcome vary by person and require a dentist’s assessment.
• Evidence limits of this card: most conditions rely on observational studies and systematic reviews, some of which report high heterogeneity or low certainty, including very low certainty in [F13] and high heterogeneity in [F17]. This card does not conclude that one option is more effective than another.

Checklist before your appointment (8 questions)

1. Which support methods are clinically feasible at the location of my missing tooth, and why is each retained or ruled out?
2. What is the current condition of the adjacent teeth—are they vital or root-canal-treated, and do existing restorations need replacement [F4][F5]?
3. Is the gap at the end of the arch? If so, which options do not require a distal abutment [F7]?
4. Are my bone height and width sufficient? If not, what directions are feasible and how long does each take [F9][F10]?
5. I have diabetes, use osteoporosis- or cancer-related medication, have a history of head-and-neck radiotherapy, or smoke. How do these conditions change your recommendation [F11][F12][F13][F14][F15]? If taking medication, bring the packages or a complete list; only the prescriber decides whether medication should change.
6. This is the level of cleaning I can realistically maintain each day. Which option is most maintainable, and how often would follow-up be needed [F11][F17][F18]?
7. Starting today, approximately how many visits and how much total time would each plan require? Can any route be shortened, and under what conditions [F20][F21]?
8. Which items are included in this treatment plan and which might be added? May I have a written itemized statement? Article 81 of Taiwan’s Medical Care Act requires disclosure of treatment policy and disposition [F26].

How to find a clinic that provides this service

This site lists no clinics and does not recommend, rate or compare any medical institution.

To find a clinic that provides this service, use the following official lookup channels yourself —

they are maintained by the competent authorities and are more current than any list:

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- The Ministry of Health and Welfare's medical-institution lookup: search by city or county,

township and specialty (dentistry) for institutions that have completed practice registration.

The results show the institution's name, address and registered specialty. This is the first place

to confirm whether a clinic is lawfully registered.

- The National Health Insurance Administration's contracted-institution lookup: check whether a

clinic is under contract with National Health Insurance. This determines which items are covered

and which are self-paid, and therefore what kind of fee explanation you will be given.

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Both systems are on the respective authorities' official websites; searching for the

medical-institution lookup or the contracted-institution lookup will find them. This site does not

reproduce the URLs, because they change; use whichever entry point the authority currently publishes.

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In an emergency, do not spend time looking up lists. If your breathing, swallowing or speech is

affected, or swelling is spreading, go to the nearest emergency department.

Chinese labels to look for on the official pages

These official systems, datasets and files are published in Chinese only. The English names above are this site's renderings; on the page itself you will see the following strings, so search for these:

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- 「醫事機構查詢」

- 「特約醫事機構查詢」

- 「特約院所查詢」

Compliance note

This article is patient health education under Article 87 of Taiwan’s Medical Care Act [F28], not a medical advertisement. It does not recommend a provider or state any price or price range. Missing-tooth rehabilitation—including implants, bridges, removable dentures, and implant-assisted removable dentures—has risks and contraindications; treatment and outcomes vary by person and require assessment by a dentist. Survival, incidence, and association figures cited here are study-level population data and cannot predict an individual result or replace clinical diagnosis. This card gives no advice on medication, discontinuation, or dosage changes; medication is the prescriber’s responsibility. This article provides no insurance-claim or legal opinion. Insurance matters depend on the terms of the policy.

Every clinical statement in this article is mapped line by line to its cited source (see the sources and evidence chain below). It has not been clinically reviewed by a licensed practitioner. This is health information, not individual advice; assessment by a clinician is required.