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Table 3 Study findings

From: Oral health knowledge, attitudes, and practices of people living with mental illness: a mixed-methods systematic review

Author, Year

Findings

Quality rating

Oral Health Knowledge

Oral Health Attitudes

Oral Health Practices

Adams et al., 2018 [34]

 

Oral health not a priority

Tooth brushing aids

 
  

- 22% No need (to see a dentist)

- 98% owned a toothbrush

 
  

- 21% Not registered with a dentist

Frequency of brushing

 
  

- 17% Dental avoidance

- 50% brushed 2–3 times a day

High

   

- 4% brushed between 1–2 times a day

 
   

- 40% brushed 1 per day-few times a week

 

Agarwal et al., 2021 [35]

 

Oral health not a priority

Tooth brushing aids

 
  

- 84.7% perceived oral health as having little influence on their lives

- 72.1% aid of cleaning teeth: toothbrush

 
   

- 77.5% rinsed mouth after every meal

Moderate

   

- 11.7% used an aid for cleaning tongue (brush or tongue cleaner)

 
   

Frequency of brushing

 
   

- 2.7% brushed teeth twice a day

 

Alkan et al., 2015 [48]

  

Frequency of brushing

 
   

- 40.6% brushed once a day

 
   

- 29.9% twice a day

 
   

- 29.9% every other day

Moderate

   

Dental visits

 
   

- 15.1% once a year

 
   

- 80.5% when had a problem

 
   

- 4.4% never visited dentist

 

Almomani et al., 2009 [28]

- Poor oral health knowledge scores related to questions on oral health knowledge < 45% (14.7 and 15.0/34)

  

High

 Anita et al., 2019 [49]

  

Tooth brushing aids

 
   

- 11% required assistance in brushing teeth and brushed teeth once a day

 
   

- 89% cleaned teeth with no assistance

 
   

Frequency of brushing

Moderate

   

- 10% cleaned twice a day

 
   

- 4% were irregular in cleaning their teeth

 

Bertaud-Gounot et al., 2013 [50]

  

Frequency of brushing

 
   

- 65% brushed once a day

 
   

- 18.2% brushed less than once a day

High

   

- 12.6% never brushed

 

Bjorkvik et al., 2021 [40]

 

Impact of mental illness- Reduced adherence to oral health care when feeling hopeless or experiencing suicidal ideation

- Some participants expressed difficulty in planning dental appointments when going through bad periods or being depressed

Barriers to accessing dental care

Practical barriers

- Some participants expressed difficulties making a dental appointment

- Transport and getting there on time was also identified as a barrier by some participants

Poor

Gurbuz, 2011 [55]

  

Frequency of brushing

- 37.6% several times a week

- 62.4% seldom/never brushed

Moderate

Hall et al., 2018 [45]

  

Barriers to accessing dental care

Cost

- 39% identified cost as a barrier,

- 22% lack of perceived need

- 8% avoiding due to anticipated problems

Practical barriers

- 7.4% had a fear or dislike of dentists

- 2.7% transportation

- 12.5% Uncertainty about coverage or difficulty accessing providers

Poor

Hede, et al., 1992 [30]

Preventative oral health care

- 80% agreed toothbrushing mattered in dental health

- 75% believed that you can improve your dental health

- 55% agreed that they expect to lose most of their teeth in their lifetime

Side effects of psychotropic medications

- 86% were not aware that medication they receive may create cavities

 

Frequency of brushing

- 59% claimed to brush their teeth twice a day

- 24% claimed they brushed their teeth one a day

- 17% claimed that they seldomly or never brushed their teeth

Dental Visit

- 66% attended the dentist regularly

Poor

Hede, B. 1995 [36]

 

Oral health not a priority- 45% of participants stated that they perceived that they needed dental treatment (due to the oral health symptoms they were experiencing)

Frequency of brushing

Regular brushing

- 42% with schizophrenia,

- 75% with affective psychosis

- 77% with reactive psychosis

- 52% with personality disorder

- 58% other

Neglect of toothbrushing

- 39% with schizophrenia,

- 42% with affective psychosis

- 39% with personality disorders

- 31% with reactive psychosis

- 27% with other

Dental visits

Constant regular dental visits = 31%

- 70% Affective psychosis

- 23% Personality disorder

- 29%, Reactive psychosis

- 24% other

High

Ho et al., 2018 [42]

 

Impact of mental illness- Coping with their mental health condition/dealing with life stressors made attending to preventive oral health routine challenging (managing their own lives and living with mental illness was a barrier to improving oral health competing priorities), even though they had intention to attend to OH

Barriers to accessing dental care

Cost

- Some participants expressed that they would often live with dental pain than seek treatment due to the cost associated with dental care

- Participants avoided seeking a dental opinion as they feared they were unable to pay the dental bill

Dental fear

- Many participants expressed dental fear and anxiety as a barrier to accessing regular dental care

Poor communication with dentists and health care providers

- Participants that had high levels of oral health literacy, miscommunication between dental practitioner and patient still occurred

- Some participants expressed that they felt that language used by dental professionals made them feel uncomfortable

Poor

Janardhanan et al., 2011 [59]

  

Dental visits

- 24.2% one dental visit in previous year

- 14.1% had at least two dental visits in previous year

High

Kebede et al., 2012 [54]

  

Frequency of brushing

- 3.8% brushed more than once a day

- 7.1% brushed once a day

- 87.5% brushed irregularly

- 1.7% did not brush

Tooth brushing technique

- 52.9% had incorrect brushing technique

- 47.1% had correct brushing technique

Moderate

Khokhar, et al., 2011 [32]

Preventative oral health care

55% basic oral hygiene knowledge (brush twice/day)

 

Tooth brushing aids

- 68% of participants had access to a toothbrush

Frequency of brushing

- 29% basic oral hygiene practice twice daily brushing (for those with a toothbrush)

Dental visits

- 34% were registered with a dentist

- 29% had a dentist visit within one year

- 50% had their dentures checked within last five years

Poor

Kuipers et al., 2018 [41]

 

Oral health not a priority- All participants expressed that they did not view dental care as a priority

- Some participants identified that Dental care was not a priority when experiencing psychosis

Barriers to accessing dental care

Cost

- Current debts and finances prevented some participants going to the dentist and/or paying for health insurance to cover dental visit

High

Kuipers et al., 2022 [58]

  

Tooth brushing aids

- 38.3% use of dental aid to brush

Frequency of brushing

- 49.4% low frequency brushing

- 46% had short duration brushing

Dental visits

- 44.4% Low number of dental visits

- 82.7% low number of dental hygienist visits

High

Kuo et al., 2020 [29]

- Poor OH knowledge scoring < 50% (4.6 and 4.3/10) on questions relating to oral health knowledge

- Moderate OH attitudes scoring average 64.6% (45.9 and 47.3 out of a range of 13–65) on questions related to attitudes towards oral health

- Poor OH practices scoring < 14% (4.1 and 3.6/10) on questions related to oral health practices including tooth brushing

Poor

Lalloo et al., 2013 [51]

  

Frequency of brushing

- 52% brushed once a day

- 24% twice a day

Dental visits

- 32% had not seen a dentist in past 2 years

High

Lopes, 2021 [52]

  

Frequency of brushing

- 37.3% brushed less than once a day

- 62.5% 2 or more times a day

High

McKibbin et al., 2015 [24]

Preventative oral health care

- Participants expressed very basic understanding about oral health including brushing and flossing

Side effects of psychotropic medication

-Limited knowledge regarding increase risk for poor oral among adults with serious mental illness

- Limited knowledge on medication side effects and impact on oral health

 

Barriers to accessing dental care

Cost

- Majority of participants expressed poverty as a barrier

- Participants expressed difficulty in affording toothpaste and dental floss

- Some participants expressed that they were unaware of what public health insurances (such as Medicaid) would cover

Practical barriers

- Difficulties accessing providers that accepted public health insurances, especially in rural areas

High

Mishu et al., 2022 [39]

 

Impact of mental illness

- Participants expressed that mental illness, including amotivation, impacted ability to maintain oral health

Oral health not a priority

- Participants felt that oral health was not considered important from the perspective of mental health and other health professionals

- Participants expressed wanting to be involved in their dental care and planning

Barriers to accessing dental care

Cost

- Participants expressed not being able to afford necessities as well as dental care

Dental fear

- Nature of dental treatments being intrusive

Practical barriers

- Difficulties accessing providers due to distance and transportation

Poor communication with dentists and health care providers

- Dentist lack of understanding about mental illness

- Negative experiences, feeling discriminated against, or misunderstood prevented participants from accessing dental services

high

Nayak et al., 2020 [53]

  

Frequency of brushing

- 68% brush once a day (48.8% depression, 8% schizophrenia, 6.8% mood disorder, 5.2% mania)

- 31.2% brush twice or more a day (19.6% depression, 4% schizophrenia, 3.6% mood disorder, 4% mania)

Poor

Ngo et al., 2018 [37]

 

Oral health not a priority- Some participants expressed that feeling lazy was a barrier to attending oral health

Frequency of brushing

- 48.9% brush twice a day

Barriers to accessing dental care

Practical barriers

- lack of access to brushing at night (for those in wheelchairs)

- long queues for brushing (limited sink numbers)

High

Nielsen et al., 2011 [60]

  

Dental visits

- 43% visited the dentist within past 12 months

- 31% had a regular annual dental check-up in past 3 years

High

Persson et al., 2009 [46]

  

Dental visits

- 77% Regular contact with a dentist

- 69% said they visited a dentist a least once a year

- 15% had not been to a dentist in the past 2 years

Barriers to accessing dental care

Cost

- 17% didn’t visit dentist due to financial

- 43% neglected teeth due to finances

Dental fear

- Low anxiety reported towards dental visits (9.12 on scale between 4–20) in participants (77%) that attended dental appointments regularly

High

Persson et al., 2010 [22]

 

Oral health not a priority- Participants expressed waiting until an acute oral health situation arose then choosing the least complicated way of managing this (having the tooth removed instead of undergoing a series of treatments)

- Denial regarding tooth ache/dental infections and hope they would go away without treatment

 

High

Sogi, 2020 [38]

 

Oral health not a priority- 41.7% never felt the need

- 27.1% lack of awareness

Tooth brushing aids

- 75.8% used brush + paste

- 12.8% used finger + powder

- 4.4% used tree stick

- 7% use other

Frequency of brushing

- 72.1% brush once a day

- 4.8% brush teeth twice a day

- 0.6% brush thrice a day

- 22.4% brush occasionally

Dental visits

- 29.3% never visited dentist

- 5.5% < 6 months dentist visit

- 10.4% dentist visit 6–12 months

- 15.2% greater than 12 months since dentist visit

- 39.6% only seen dentist when there is some problem

Barriers to accessing dental care

Cost

- 14.6% costly treatment

Dental fear

- 2.1% dental anxiety

Practical barriers

- 14.6% time constraint

Poor

Stevens et al., 2010 [33]

- 61% could not identify a dentist to visit

 

Tooth brushing aids

- 28% of participants did not have a toothbrush/toothpaste

Frequency of brushing

- 30% of brushed twice a day

- 40% brushed once a day

- 25% brushed between daily and weekly

- 5% less often than weekly

Dental visits

- 55% last saw a dentist over 1 year ago

High

Tani et al., 2012 [56]

  

Frequency of brushing

- 26% brushed less than once a day

- 29.6% brushed once a day

- 18.9% brushed twice a day

- 25.5% brushed 3 or more times a day

High

Teng et al., 2011 [31]

Preventative oral health care

- 82.5% did not identify regular oral health check-ups as necessary

- 50% identified dental pain as a reason to see a dentist

 

Frequency of brushing

- 49% neglected tooth brushing

Dental visits

- 22.5% visited dentist within 1 year

- 28% had not visited the dentist in recent years

- 25% consulted dentists when they suspected an oral health problem

High

Tredget et al., 2019 [57]

  

Frequency of brushing

- 50% twice daily

- 31.1% daily

- 9.4% every 2 days

- 4.7% mouthwash only

- 3.8% Never

Dental visits

- 50% less than 6 months

- 23.6% only when there is problem

- 18.9% Never

- 3.8% annually

- 3.8% every 2 years

Barriers to accessing dental care

Dental fears

- 27% of patients had significant anxiety about dental care

Poor

Villadsen et al., 2017 [43]

 

Impact of mental illness- Symptomology of mental illness affected ability to take care of oral health

Oral health not a priority- Oral health not assigned a priority among other self-care priorities

 

High

Waplington et al., 2000 [47]

  

Barriers to accessing dental care

Cost

- Two residents expressed financial reasons prevented them from attending the dentist

Poor

Wright et al., 2021 [44]

 

Oral health not a priority- Some participants considered oral health a low priority

Barriers to accessing dental care

Cost

- cost/limited income/lack of dental insurance

- socioeconomic status

Dental fear

- dental anxiety

- fear of pain

- negative experiences with dental care

- fear of suffocation

Practical barrier

- Expressed transportation as a barrier

Poor communication with dentist and health care providers

- perceived lack of empathy

- lack of communication by dentists

- lack of communication on oral health by psychiatrists

High

Yoshii et al., 2017 [61]

  

Tooth brushing aids

Use of fluoride toothpaste

Yes = 45.8%, No = 31.7%, unaware of toothpaste content 22.5%

Use of interdental brushes or floss

Everyday = 14.8%, sometimes 20.4%, No = 64.8%

Frequency of brushing

Tooth brushing before bed

Everyday M = 32.7%, F = 27.9%, Sometimes = M 11.5%, F = 4.3%, No = M 18.3%, F = 5.3%

Tooth brushing after meals

Ever day M = 20.1%, F = 16.4%; Sometimes M = 28.6%, F = 16.4% No M = 13.8%, F = 4.6%

Of those in the program at Baseline (n = 142)

Tooth brushing after meals

Everyday = 38.7%, sometimes = 43.7%, No = 17.6%

Tooth brushing on the go

Always = 20.4%, sometimes = 26.1%, No = 53.5%

Dental visits

- Yearly routine dental visit Yes: M = 15.8%, F = 16.1%, No: M = 46.7%, F = 21.4%

- 19% Regular basis

- 21.8%, Go early when you have a concern

- 49.3%, when there is a worrying symptom

- 9.9% when there are multiple symptoms

High