8+ Ways to Remove White Spots on Teeth Fast


8+ Ways to Remove White Spots on Teeth Fast

The presence of lighter-colored areas on tooth enamel is a typical aesthetic concern. Addressing these discolorations includes varied dental therapies designed to revive a uniform look. These strategies vary from minimally invasive procedures to extra advanced restorative choices, relying on the severity and underlying explanation for the enamel variation. As an example, microabrasion methods can gently polish away superficial imperfections, whereas resin infiltration goals to fill porous enamel and scale back the distinction between affected and wholesome areas.

Attaining a constant tooth shade affords each beauty and psychological benefits. A extra uniform smile can enhance shallowness and confidence in social interactions. Traditionally, people have sought options for tooth discoloration, resulting in the event and refinement of assorted dental procedures. Up to date approaches deal with preserving pure tooth construction whereas delivering efficient and long-lasting outcomes, reflecting developments in dental supplies and methods.

The following sections will delve into the precise remedy choices obtainable for addressing these enamel discolorations, detailing their mechanisms, suitability for various instances, and potential outcomes. The objective is to supply a radical understanding of the approaches dentists make the most of to handle and proper these frequent dental aesthetic issues.

1. Prognosis and evaluation

Efficient administration of enamel discolorations hinges critically on correct analysis and complete evaluation. Figuring out the underlying trigger of those spots is paramount, because the etiology immediately dictates the suitable remedy technique. As an example, fluorosis-induced imperfections require a unique strategy than these ensuing from enamel demineralization throughout orthodontic remedy. Visible examination, medical historical past overview, and doubtlessly radiographic analysis are normal parts of the diagnostic course of. Moreover, the severity and distribution of the spots should be rigorously assessed to find out the extent of remedy mandatory. With no exact analysis, therapeutic interventions could also be ineffective and even detrimental to the long-term well being of the tooth construction.

The diagnostic course of typically includes differentiating between varied potential causes. Enamel hypoplasia, a developmental defect, presents otherwise from the preliminary phases of dental caries. Equally, trauma to a creating tooth can lead to localized discolorations that require a definite remedy plan. Superior diagnostic instruments, comparable to transillumination or fluorescence-based imaging, can help in visualizing delicate enamel variations and figuring out the presence of subsurface lesions. Documenting the dimensions, form, and placement of the spots offers a baseline for monitoring remedy progress and evaluating long-term stability. This meticulous evaluation ensures that the chosen remedy successfully addresses the precise traits of the discoloration.

In abstract, correct analysis and thorough evaluation kind the cornerstone of profitable remedy for enamel discolorations. This preliminary step permits clinicians to tailor remedy plans to the person wants of every affected person, maximizing the potential for attaining each aesthetic and purposeful enhancements. Ignoring the significance of this diagnostic section can result in suboptimal outcomes and doubtlessly compromise the general well being and integrity of the affected enamel.

2. Microabrasion effectiveness

Microabrasion is a conservative dental process incessantly employed to deal with superficial enamel discolorations. Its effectiveness is immediately associated to the depth and nature of the imperfections, making it a viable possibility for sure kinds of enamel spots.

  • Mechanism of Motion

    Microabrasion includes the managed elimination of a skinny layer of enamel utilizing an abrasive compound mixed with an acidic agent. This course of mechanically and chemically polishes the tooth floor, lowering the visibility of superficial enamel irregularities. The effectiveness hinges on the discoloration being restricted to the outer enamel layer; deeper imperfections are unlikely to reply favorably.

  • Superb Candidates

    Essentially the most appropriate candidates for microabrasion are people with superficial enamel discolorations brought on by situations comparable to delicate fluorosis or enamel demineralization. These situations sometimes lead to white or brownish spots which might be confined to the outer enamel. Instances involving deeper structural defects or discolorations extending into the dentin are usually not amenable to this remedy.

  • Limitations and Options

    Microabrasion just isn’t efficient for all sorts of enamel discolorations. In instances the place the spots are deeply embedded or brought on by underlying dental situations, different therapies comparable to resin infiltration, dental bleaching, or restorative procedures (e.g., veneers) could also be mandatory. Microabrasion additionally carries a small threat of non permanent tooth sensitivity, which is often managed with desensitizing brokers.

  • Scientific Outcomes and Longevity

    When appropriately indicated, microabrasion can yield vital aesthetic enhancements. The longevity of the outcomes will depend on sustaining good oral hygiene practices and addressing any underlying elements that contributed to the preliminary discoloration. Periodic upkeep therapies could also be essential to protect the aesthetic consequence over time.

The effectiveness of microabrasion is critically depending on correct analysis and case choice. Whereas it affords a conservative and comparatively non-invasive strategy to addressing superficial enamel discolorations, its limitations should be acknowledged. Different remedy modalities exist for instances the place microabrasion just isn’t appropriate, underscoring the significance of a complete dental analysis.

3. Resin infiltration approach

The resin infiltration approach represents a minimally invasive strategy to addressing sure kinds of enamel discolorations, notably white spot lesions. These lesions, typically arising from post-orthodontic demineralization or enamel hypoplasia, exhibit elevated porosity in comparison with wholesome enamel. The resin infiltration approach leverages this porosity, using a low-viscosity resin to penetrate and fill the microscopic areas throughout the affected enamel. This course of successfully alters the optical properties of the lesion, lowering the refractive index distinction between the lesion and surrounding wholesome enamel, thereby diminishing or eliminating the seen white spot. A business instance is using a product containing hydrochloric acid etching, adopted by ethanol drying, after which resin infiltration. The cause-and-effect relationship is obvious: elevated enamel porosity causes visible discoloration, and resin infiltration eliminates that porosity, eliminating that discoloration.

The success of the resin infiltration approach hinges on correct analysis and case choice. It’s best for non-cavitated lesions, the place the enamel floor stays intact. Pre-treatment etching with hydrochloric acid is essential to take away the floor layer and create micro-retentions, facilitating resin penetration. An actual-world instance consists of its utilization to handle post-orthodontic white spot lesions in adolescent sufferers, restoring a extra uniform tooth look following bracket elimination. The sensible significance lies in its means to enhance aesthetics with out resorting to extra invasive procedures like veneers or composite restorations. Furthermore, resin infiltration can halt the development of early caries, offering a twin good thing about aesthetic enchancment and preventative care.

In abstract, the resin infiltration approach affords a useful instrument in managing choose instances of enamel discolorations. Its effectiveness stems from its means to penetrate and alter the optical properties of porous enamel, thereby lowering the visibility of white spot lesions. Whereas it isn’t a common answer for all sorts of enamel discolorations, its minimally invasive nature and potential for caries prevention make it a clinically vital remedy possibility. The approach’s success depends on meticulous utility and acceptable case choice based mostly on lesion traits and affected person elements.

4. Enamel remineralization choices

Enamel remineralization choices represent a preventative and, in some cases, restorative strategy to managing preliminary enamel lesions that manifest as white spots. This technique goals to reverse early demineralization, thereby minimizing the visibility and development of those aesthetic and doubtlessly cariogenic defects. The choice of acceptable remineralization brokers is crucial for attaining optimum outcomes.

  • Fluoride Remedy

    Fluoride utility, a cornerstone of remineralization, promotes the incorporation of fluoride ions into the enamel construction, forming fluorapatite, which is extra proof against acid dissolution. This course of reduces the solubility of enamel and enhances its means to resist acidic assaults from bacterial metabolism. Actual-world examples embrace using prescription-strength fluoride toothpaste or skilled fluoride varnish functions to reverse early white spot lesions, notably these arising from orthodontic remedy. The implication is a strengthened enamel floor much less vulnerable to additional demineralization and potential caries formation.

  • Amorphous Calcium Phosphate (ACP)

    ACP-based merchandise ship calcium and phosphate ions on to the tooth floor, facilitating the remineralization course of. ACP transforms into hydroxyapatite, the first mineral part of enamel, throughout the lesion. Scientific functions embrace ACP-containing toothpastes and gels used to deal with early white spot lesions. As an example, post-orthodontic sufferers can profit from ACP to deal with enamel demineralization round bracket areas. The result’s a replenishment of misplaced minerals, contributing to the discount in dimension and visibility of the white spots.

  • Casein Phosphopeptide-Amorphous Calcium Phosphate (CPP-ACP)

    CPP-ACP enhances the bioavailability of calcium and phosphate ions, rising their focus on the tooth floor. Casein phosphopeptides stabilize ACP, stopping its precipitation and permitting for sustained launch of calcium and phosphate ions. CPP-ACP merchandise, comparable to chewing gum and topical lotions, are used to advertise remineralization and scale back the looks of white spot lesions. An instance is using CPP-ACP merchandise in people with dry mouth, who’re at larger threat for enamel demineralization. The consequence is a steady provide of minerals to advertise enamel restore and scale back the visible impression of white spots.

  • Xylitol

    Whereas indirectly a remineralizing agent, xylitol, a sugar alcohol, inhibits the expansion of cariogenic micro organism, lowering acid manufacturing and not directly selling remineralization. Xylitol disrupts the metabolic processes of Streptococcus mutans, a major bacterium concerned in caries improvement. Xylitol-containing chewing gum and lozenges are generally used to cut back the danger of caries and assist enamel remineralization. An instance is the advice of xylitol gum to sufferers with a historical past of caries or these present process orthodontic remedy. The oblique impact is a discount in acid-induced demineralization, creating an setting conducive to enamel restore.

These remineralization choices, individually or together, supply a method to handle and doubtlessly reverse early enamel lesions that manifest as white spots. The choice of the suitable agent or mixture of brokers will depend on the etiology of the lesions, the affected person’s threat elements, and adherence to prescribed protocols. Whereas remineralization can scale back the visibility of white spots, it could not utterly remove them, particularly in instances of serious enamel injury. In such cases, different remedy modalities, comparable to microabrasion or resin infiltration, could also be mandatory to realize the specified aesthetic consequence.

5. Fluoride utility advantages

Fluoride utility performs a big position within the administration and potential discount of white spot lesions on enamel. Its advantages are intertwined with the processes of enamel remineralization and caries prevention, immediately influencing the aesthetic look of enamel.

  • Enhancement of Enamel Remineralization

    Fluoride ions, when utilized to the tooth floor, promote the incorporation of calcium and phosphate ions into the enamel construction, resulting in the formation of fluorapatite. Fluorapatite is extra proof against acid dissolution than the unique hydroxyapatite, strengthening the enamel and reversing early demineralization. Actual-world examples embrace using fluoride varnishes or prescription-strength fluoride toothpaste on sufferers with early white spot lesions, notably after orthodontic remedy. This course of reduces the visible prominence of those lesions by restoring mineral content material to the affected areas.

  • Inhibition of Caries Development

    White spot lesions typically symbolize the preliminary phases of dental caries. Fluoride utility inhibits the metabolic exercise of cariogenic micro organism, lowering the manufacturing of acids that additional demineralize the enamel. Common fluoride therapies, comparable to fluoride mouth rinses or skilled functions, create an setting much less conducive to caries improvement, stopping the development of white spot lesions into extra extreme decay. This motion preserves the integrity of the enamel and minimizes the necessity for extra invasive restorative procedures.

  • Improved Enamel Resistance to Acid Assaults

    Fluoride strengthens the enamel construction, rising its resistance to acid assaults from dietary sources and bacterial metabolism. This enhanced resistance protects the enamel from additional demineralization and the formation of recent white spot lesions. For instance, communities with fluoridated water provides exhibit decrease charges of dental caries and fewer cases of enamel demineralization, together with white spot lesions. The result’s a extra resilient tooth floor that’s much less vulnerable to aesthetic and purposeful injury.

  • Adjunctive Function in Different Remedy Modalities

    Fluoride utility typically serves as an adjunct to different remedy modalities aimed toward addressing white spot lesions, comparable to microabrasion or resin infiltration. Following these therapies, fluoride helps to keep up the remineralized enamel and forestall recurrence of the lesions. The strategic utility of fluoride, along with different interventions, ensures long-term aesthetic and purposeful success. As an example, after microabrasion, fluoride utility can strengthen the newly uncovered enamel floor, lowering the danger of subsequent demineralization.

In abstract, fluoride utility affords a number of advantages within the context of managing and doubtlessly lowering white spot lesions. Its position in enhancing enamel remineralization, inhibiting caries development, bettering enamel resistance to acid assaults, and serving as an adjunct to different remedy modalities underscores its significance in sustaining each the aesthetic look and the purposeful integrity of enamel. Integrating fluoride right into a complete oral hygiene routine is essential for stopping and addressing white spot lesions, contributing to general dental well being.

6. Beauty restoration strategies

Beauty restoration strategies supply definitive options when addressing enamel discolorations, together with white spot lesions, that show refractory to much less invasive approaches. These strategies purpose to masks or remove the visible imperfections via the applying of restorative supplies.

  • Dental Veneers

    Dental veneers, skinny shells sometimes crafted from porcelain or composite resin, are bonded to the facial floor of enamel to hide imperfections. In instances the place white spots are intensive or deeply embedded throughout the enamel, veneers present a uniform and aesthetically pleasing look. An instance consists of using porcelain veneers to cowl extreme fluorosis stains, utterly masking the underlying discolorations. The implication is a sturdy and visually transformative answer, although requiring enamel discount for correct match.

  • Composite Resin Fillings

    Composite resin fillings can be utilized to revive localized areas of enamel discoloration. This system includes eradicating the affected enamel and changing it with a tooth-colored composite materials. This strategy is appropriate for smaller, extra outlined white spots. A state of affairs can be the restoration of a small space of enamel hypoplasia utilizing composite resin to match the encircling tooth construction. The result’s a seamless mix, masking the defect and restoring a uniform look.

  • Dental Crowns

    Dental crowns, full-coverage restorations, are employed in instances the place the white spots are related to vital structural injury or weakening of the tooth. Crowns encase your complete seen portion of the tooth, offering each aesthetic enchancment and structural assist. An instance would possibly contain the location of a crown on a tooth with intensive fluorosis and enamel erosion. The benefit is complete protection and reinforcement, though it necessitates extra aggressive tooth preparation.

  • Enamel Microabrasion Mixed with Resin Restoration

    This mixed strategy initially employs microabrasion to take away superficial enamel discolorations. Following microabrasion, any remaining imperfections are addressed with composite resin to realize a ultimate, uniform look. This strategy represents a much less invasive different to full veneers. A sensible utility is using microabrasion to lighten white spots, adopted by resin restoration to fill any remaining defects. The consequence is a conservative remedy possibility that addresses each superficial and deeper discolorations.

Beauty restoration strategies symbolize a spectrum of choices for addressing enamel discolorations, starting from minimally invasive resin restorations to full-coverage crowns. The choice of an acceptable technique is contingent on the extent and nature of the white spots, in addition to the affected person’s aesthetic objectives. Whereas these strategies supply definitive options for concealing enamel imperfections, they might contain extra intensive tooth preparation in comparison with much less invasive methods. The final word objective is to realize a harmonious steadiness between aesthetics and preservation of pure tooth construction.

7. Underlying trigger identification

Efficient administration of enamel discolorations, particularly white spot lesions, basically will depend on precisely figuring out the underlying trigger. The etiology dictates the choice of acceptable remedy modalities, influencing each the success and longevity of the intervention. A misdiagnosis can result in ineffective and even detrimental remedy outcomes. Subsequently, a radical diagnostic course of is paramount earlier than initiating any therapeutic strategy.

  • Differentiating Fluorosis from Demineralization

    Fluorosis, ensuing from extreme fluoride publicity throughout tooth improvement, manifests as enamel hypomineralization. Demineralization, typically related to poor oral hygiene or orthodontic remedy, arises from acid assaults. Distinguishing between these two is crucial. For instance, microabrasion would possibly enhance delicate fluorosis, whereas remineralization remedy is extra appropriate for demineralization. Misidentification can lead to ineffective remedy and continued aesthetic issues.

  • Assessing Enamel Hypoplasia and Trauma

    Enamel hypoplasia, a developmental defect, presents with various levels of enamel deficiency. Trauma to a creating tooth may cause localized discolorations. These situations require distinct administration methods. As an example, composite resin restoration may be acceptable for enamel hypoplasia, whereas remark and fluoride remedy might suffice for delicate trauma-induced spots. Failure to acknowledge these particular etiologies can result in inappropriate remedy and suboptimal outcomes.

  • Figuring out Caries-Associated Lesions

    White spot lesions can symbolize the preliminary stage of dental caries. Correct analysis is essential to distinguish these from different kinds of enamel discolorations. If the white spot is caries-related, remineralization remedy and improved oral hygiene are mandatory to stop development. Treating a caries lesion as a purely aesthetic situation might lead to superior decay and eventual tooth loss.

  • Contemplating Systemic Components and Medicines

    Sure systemic situations and medicines can affect enamel improvement and mineralization, contributing to white spot formation. Figuring out these elements is important for complete administration. For instance, tetracycline staining may cause intrinsic discoloration that requires completely different remedy approaches than enamel demineralization. Ignoring systemic elements can restrict the effectiveness of native remedy and contribute to recurrence.

The correct identification of the underlying explanation for white spot lesions types the cornerstone of efficient administration. This diagnostic course of permits clinicians to tailor remedy plans to the person wants of every affected person, maximizing the potential for attaining each aesthetic and purposeful enhancements. A radical evaluation considers varied etiologies, together with fluorosis, demineralization, enamel hypoplasia, trauma, caries, and systemic elements, making certain that the chosen remedy successfully addresses the precise traits of the discoloration and promotes long-term dental well being.

8. Preventive upkeep methods

Methods designed to keep up oral well being play a crucial position in mitigating the formation and recurrence of enamel discolorations, together with white spot lesions. These preventive measures, when persistently applied, can scale back the necessity for extra invasive interventions centered on the elimination of established lesions. The efficacy of those methods hinges on addressing the underlying elements that contribute to enamel demineralization and selling situations conducive to remineralization.

  • Optimum Oral Hygiene Practices

    Constant and efficient tooth brushing, flossing, and using interdental cleansing aids take away plaque and forestall the buildup of micro organism that produce acids. These acids demineralize enamel, resulting in white spot lesions. For instance, people present process orthodontic remedy require meticulous oral hygiene to stop demineralization round brackets. Failure to keep up satisfactory hygiene will increase the chance of white spot formation, necessitating subsequent interventions to deal with the lesions.

  • Fluoride Publicity and Utility

    Common publicity to fluoride strengthens enamel and enhances its resistance to acid assaults. Fluoride could be delivered via fluoridated water, toothpaste, mouth rinses, {and professional} functions. Communities with fluoridated water expertise decrease charges of dental caries and fewer cases of white spot lesions. The constant use of fluoride merchandise reinforces enamel, minimizing the potential for demineralization and the following formation of ugly lesions.

  • Dietary Modifications and Management

    Limiting the consumption of sugary and acidic meals and drinks reduces the frequency and length of acid assaults on enamel. Frequent snacking on sugary gadgets creates a protracted acidic setting, selling demineralization. Lowering sugar consumption and choosing more healthy alternate options contributes to a extra impartial oral pH, minimizing the danger of white spot formation. Examples embrace limiting soda consumption and selecting water or unsweetened drinks.

  • Skilled Dental Cleanings and Examinations

    Common skilled dental cleanings take away plaque and tartar, disrupting the biofilm that contributes to enamel demineralization. Dental examinations enable for the early detection of enamel lesions and the implementation of preventive measures earlier than they progress. Routine check-ups allow dentists to observe oral well being and supply tailor-made suggestions for sustaining enamel integrity, lowering the danger of needing extra concerned therapies to take away established white spots.

In abstract, preventive upkeep methods are instrumental in minimizing the incidence and severity of enamel discolorations. These methods, encompassing optimum oral hygiene practices, fluoride publicity, dietary modifications, {and professional} dental care, create an setting conducive to enamel remineralization and scale back the danger of demineralization. The constant implementation of those measures contributes to long-term oral well being and aesthetic outcomes, lowering the need for interventions centered solely on lesion elimination.

Regularly Requested Questions

This part addresses frequent inquiries relating to the administration and remedy of enamel discolorations, particularly white spot lesions. Data offered goals to supply readability and understanding of the obtainable choices and their implications.

Query 1: What are the first causes of white spots on enamel?

White spot lesions can come up from varied elements, together with fluorosis (extreme fluoride publicity throughout tooth improvement), enamel demineralization (typically related to poor oral hygiene or orthodontic remedy), enamel hypoplasia (a developmental defect), and trauma to creating enamel. Correct analysis is important to find out the underlying trigger and information acceptable remedy.

Query 2: Is it potential to take away white spots utterly?

The potential of full elimination will depend on the severity and etiology of the lesions. Superficial discolorations might reply effectively to minimally invasive therapies comparable to microabrasion or resin infiltration. Deeper or extra intensive lesions would possibly require beauty restoration strategies like veneers or composite fillings to realize full masking.

Query 3: How does microabrasion work to enhance the looks of white spots?

Microabrasion includes the managed elimination of a skinny layer of enamel utilizing an abrasive compound mixed with an acidic agent. This course of polishes the tooth floor, lowering the visibility of superficial enamel irregularities. Its effectiveness is proscribed to imperfections confined to the outer enamel layer.

Query 4: What’s the position of fluoride in addressing enamel discolorations?

Fluoride strengthens enamel and enhances its resistance to acid assaults. It promotes remineralization of early enamel lesions, doubtlessly lowering their visibility and stopping their development into extra extreme decay. Fluoride is commonly used as an adjunct to different therapies, comparable to microabrasion or resin infiltration.

Query 5: Are there any over-the-counter merchandise that may successfully take away white spots?

Whereas some over-the-counter merchandise, comparable to fluoride toothpaste and remineralizing brokers, may help to stop or handle early enamel lesions, they’re unlikely to utterly take away established white spots. Skilled dental therapies are sometimes mandatory to realize vital aesthetic enchancment.

Query 6: What are the long-term upkeep necessities after remedy for white spots?

Lengthy-term upkeep includes constant oral hygiene practices, together with common brushing, flossing, {and professional} dental cleanings. Limiting the consumption of sugary and acidic meals can also be necessary. Periodic fluoride functions could also be really useful to keep up enamel power and forestall recurrence.

The data supplied on this FAQ part is meant for normal information and informational functions solely, and doesn’t represent medical recommendation. Session with a certified dental skilled is important for correct analysis and individualized remedy suggestions.

The following part will present insights into the long-term prognosis following remedy.

Steerage on Managing Enamel Discolorations

This part presents particular, actionable steering regarding the strategy to addressing enamel discolorations, notably these presenting as white spot lesions.

Tip 1: Prioritize Skilled Prognosis: Earlier than initiating any remedy, seek the advice of a dentist for correct identification of the underlying trigger. Differentiating between fluorosis, demineralization, and different etiologies is essential for choosing acceptable interventions.

Tip 2: Embrace Early Intervention: Tackle white spot lesions of their preliminary phases. Early interventions, comparable to remineralization remedy or improved oral hygiene, can stop development and scale back the necessity for extra invasive therapies.

Tip 3: Emphasize Meticulous Oral Hygiene: Implement a constant and efficient oral hygiene routine, together with common brushing, flossing, and using interdental cleansing aids. This minimizes plaque accumulation and prevents additional enamel demineralization.

Tip 4: Strategic Fluoride Utilization: Incorporate fluoride into the every day oral hygiene routine via fluoridated toothpaste, mouth rinses, or skilled functions. Fluoride strengthens enamel and enhances its resistance to acid assaults.

Tip 5: Aware Dietary Selections: Restrict the consumption of sugary and acidic meals and drinks. Frequent publicity to those substances contributes to enamel demineralization and the formation of white spot lesions.

Tip 6: Think about Microabrasion for Superficial Lesions: For superficial enamel discolorations, microabrasion can successfully take away the affected layer and enhance the tooth’s look. This system is most fitted for lesions confined to the outer enamel.

Tip 7: Discover Resin Infiltration for Porous Enamel: In instances of porous enamel, comparable to post-orthodontic white spot lesions, resin infiltration can penetrate and fill the microscopic areas, lowering the refractive index distinction and diminishing the visibility of the lesion.

Adherence to those suggestions can facilitate the efficient administration and potential discount of enamel discolorations, contributing to improved aesthetics and long-term dental well being.

The next part affords conclusive remarks relating to the excellent administration of enamel irregularities.

Conclusion

The exploration of the best way to take away white spots on enamel has revealed a spectrum of approaches, starting from preventative measures to restorative interventions. Correct analysis of the underlying trigger is paramount, guiding the choice of acceptable remedy modalities. Whereas superficial discolorations might reply favorably to microabrasion or resin infiltration, deeper lesions necessitate beauty restoration. Constant oral hygiene and strategic fluoride use function essential preventive measures.

Efficient administration of enamel discolorations requires a complete and individualized strategy. Prioritizing preventative methods and searching for skilled steering ensures the upkeep of each aesthetic attraction and long-term dental well being. A dedication to those ideas represents a proactive funding in preserving the integrity and look of the dentition.